Load only one job at a time

As a result of job, other jobs can be added or deleted. To avoid
processing deleted jobs and to process other jobs in the correct order,
we should reload them after performing each job.

However, we don't use "LIMIT 1" in SQL queries, because we want to be
able to skip over invalid jobs, and checking if job is invalid can only
be done in Rust.

CHANGELOG.md

@@ -1,5 +1,74 @@
 # Changelog 
 
+## 1.0.0-beta.22
+
+- #1095 normalize email lineends to CRLF
+
+- #1095 enable link-time-optimization, saves eg. on android 11 mb
+
+- #1099 fix import regarding devicechats
+
+- #1092 improve logging
+
+- #1096 #1097 #1094 #1090 #1091 internal cleanups
+
+## 1.0.0-beta.21
+
+- #1078 #1082 ensure RFC compliance by producing 78 column lines for
+  encoded attachments. 
+
+- #1080 don't recreate and thus break group membership if an unknown 
+  sender (or mailer-daemon) sends a message referencing the group chat 
+
+- #1081 #1079 some internal cleanups 
+
+- update imap-proto dependency, to fix yandex/oauth 
+
+## 1.0.0-beta.20
+
+- #1074 fix OAUTH2/gmail
+- #1072 fix group members not appearing in contact list
+- #1071 never block interrupt_idle (thus hopefully also not on maybe_network())
+- #1069 reduce smtp-timeout to 30 seconds
+- #1066 #1065 avoid unwrap in dehtml, make literals more readable
+
+## 1.0.0-beta.19
+
+- #1058 timeout smtp-send if it doesn't complete in 15 minutes 
+
+- #1059 trim down logging
+
+## 1.0.0-beta.18
+
+- #1056 avoid panicking when we couldn't read imap-server's greeting
+  message 
+
+- #1055 avoid panicking when we don't have a selected folder
+
+- #1052 #1049 #1051 improve logging to add thread-id/name and
+  file/lineno to each info/warn message.
+
+- #1050 allow python bindings to initialize Account with "os_name".
+
+
+## 1.0.0-beta.17
+
+- #1044 implement avatar recoding to 192x192 in core to keep file sizes small. 
+
+- #1024 fix #1021 SQL/injection malformed Chat-Group-Name breakage
+
+- #1036 fix smtp crash by pulling in a fixed async-smtp 
+
+- #1039 fix read-receipts appearing as normal messages when you change
+  MDN settings 
+
+- #1040 do not panic on SystemTimeDifference
+
+- #1043 avoid potential crashes in malformed From/Chat-Disposition... headers  
+
+- #1045 #1041 #1038 #1035 #1034 #1029 #1025 various cleanups and doc
+  improvments 
+
 ## 1.0.0-beta.16
 
 - alleviate login problems with providers which only

Cargo.toml

@@ -1,9 +1,12 @@
 [package]
 name = "deltachat"
-version = "1.0.0-beta.16"
+version = "1.0.0-beta.22"
 authors = ["Delta Chat Developers (ML) <delta@codespeak.net>"]
 edition = "2018"
-license = "MPL"
+license = "MPL-2.0"
+
+[profile.release]
+lto = true
 
 [dependencies]
 deltachat_derive = { path = "./deltachat_derive" }
@@ -14,13 +17,16 @@ hex = "0.4.0"
 sha2 = "0.8.0"
 rand = "0.7.0"
 smallvec = "1.0.0"
-reqwest = { version = "0.9.15" }
+reqwest = { version = "0.10.0", features = ["blocking", "json"] }
 num-derive = "0.3.0"
 num-traits = "0.2.6"
-async-smtp = { git = "https://github.com/async-email/async-smtp", branch = "master" }
+async-smtp = { git = "https://github.com/async-email/async-smtp" }
 email = { git = "https://github.com/deltachat/rust-email", branch = "master" }
-lettre_email = { git = "https://github.com/deltachat/lettre", branch = "native_tls" }
-async-imap = { git = "https://github.com/async-email/async-imap", branch="native_tls", default-features = false, features = ["tls_native"] }
+lettre_email = { git = "https://github.com/deltachat/lettre", branch = "master" }
+
+# XXX newer commits of async-imap lead to import-export tests hanging
+async-imap = { git = "https://github.com/async-email/async-imap", branch = "dcc-stable" }
+
 async-native-tls = "0.1.1"
 async-std = { version = "1.0", features = ["unstable"] }
 base64 = "0.11"
@@ -36,8 +42,8 @@ indexmap = "1.3.0"
 rustyline = "4.1.0"
 lazy_static = "1.4.0"
 regex = "1.1.6"
-rusqlite = { version = "0.20", features = ["bundled"] }
-r2d2_sqlite = "0.12.0"
+rusqlite = { version = "0.21", features = ["bundled"] }
+r2d2_sqlite = "0.13.0"
 r2d2 = "0.8.5"
 strum = "0.16.0"
 strum_macros = "0.16.0"
@@ -52,9 +58,10 @@ bitflags = "1.1.0"
 debug_stub_derive = "0.3.0"
 sanitize-filename = "0.2.1"
 stop-token = { version = "0.1.1", features = ["unstable"] }
-mailparse = "0.10.1"
+mailparse = "0.10.2"
 encoded-words = { git = "https://github.com/async-email/encoded-words", branch="master" }
 native-tls = "0.2.3"
+image = { version = "0.22.4", default-features=false, features = ["gif_codec", "jpeg", "ico", "png_codec", "pnm", "webp", "bmp"] }
 
 [dev-dependencies]
 tempfile = "3.0"
@@ -79,6 +86,6 @@ path = "examples/repl/main.rs"
 
 [features]
 default = ["nightly", "ringbuf"]
-vendored = ["native-tls/vendored", "reqwest/default-tls-vendored"]
+vendored = ["native-tls/vendored", "reqwest/native-tls-vendored"]
 nightly = ["pgp/nightly"]
 ringbuf = ["pgp/ringbuf"]

LICENSE

@@ -2,9 +2,6 @@ The files in this directory and under its subdirectories
 are (c) 2019 by Bjoern Petersen and contributors and released under the
 Mozilla Public License Version 2.0, see below for a copy.
 
-NOTE that the files in the "libs" directory are copyrighted by third parties
-and come with their own respective licenses.
-
 Mozilla Public License Version 2.0
 ==================================
 

README.md

@@ -114,3 +114,22 @@ $ cargo test -- --ignored
 [circle]: https://circleci.com/gh/deltachat/deltachat-core-rust/
 [appveyor-shield]: https://ci.appveyor.com/api/projects/status/lqpegel3ld4ipxj8/branch/master?style=flat-square
 [appveyor]: https://ci.appveyor.com/project/dignifiedquire/deltachat-core-rust/branch/master
+
+## Language bindings and frontend projects
+
+Language bindings are available for:
+
+- [C](https://c.delta.chat)
+- [Node.js](https://www.npmjs.com/package/deltachat-node)
+- [Python](https://py.delta.chat)
+- [Go](https://github.com/hugot/go-deltachat/)
+- **Java** and **Swift** (contained in the Android/iOS repos)
+
+The following "frontend" projects make use of the Rust-library
+or its language bindings:
+
+- [Android](https://github.com/deltachat/deltachat-android)
+- [iOS](https://github.com/deltachat/deltachat-ios)
+- [Desktop](https://github.com/deltachat/deltachat-desktop)
+- [Pidgin](https://code.ur.gs/lupine/purple-plugin-delta/)
+- several **Bots**

deltachat-ffi/Cargo.toml

@@ -1,11 +1,11 @@
 [package]
 name = "deltachat_ffi"
-version = "1.0.0-beta.16"
+version = "1.0.0-beta.22"
 description = "Deltachat FFI"
 authors = ["Delta Chat Developers (ML) <delta@codespeak.net>"]
 edition = "2018"
 readme = "README.md"
-license = "MIT OR Apache-2.0"
+license = "MPL-2.0"
 
 keywords = ["deltachat", "chat", "openpgp", "email", "encryption"]
 categories = ["cryptography", "std", "email"]
@@ -21,6 +21,7 @@ libc = "0.2"
 human-panic = "1.0.1"
 num-traits = "0.2.6"
 failure = "0.1.6"
+serde_json = "1.0"
 
 [features]
 default = ["vendored", "nightly", "ringbuf"]

deltachat-ffi/deltachat.h

@@ -404,14 +404,14 @@ int             dc_set_config                (dc_context_t* context, const char*
 char*           dc_get_config                (dc_context_t* context, const char* key);
 
 /**
- * Set stock string translation. 
+ * Set stock string translation.
  *
- * The function will emit warnings if it returns an error state. 
+ * The function will emit warnings if it returns an error state.
  *
  * @memberof dc_context_t
  * @param context The context object
  * @param stock_id   the integer id of the stock message (DC_STR_*)
- * @param stock_msg  the message to be used 
+ * @param stock_msg  the message to be used
  * @return int (==0 on error, 1 on success)
  */
 int             dc_set_stock_translation(dc_context_t* context, uint32_t stock_id, const char* stock_msg);
@@ -1603,7 +1603,7 @@ char*           dc_get_mime_headers          (dc_context_t* context, uint32_t ms
 void            dc_delete_msgs               (dc_context_t* context, const uint32_t* msg_ids, int msg_cnt);
 
 /**
- * Empty IMAP server folder: delete all messages. 
+ * Empty IMAP server folder: delete all messages.
  *
  * @memberof dc_context_t
  * @param context The context object as created by dc_context_new()
@@ -2618,18 +2618,18 @@ dc_context_t*    dc_chatlist_get_context     (dc_chatlist_t* chatlist);
 
 
 /**
- * Get info summary for a chat, in json format. 
+ * Get info summary for a chat, in json format.
  *
- * The returned json string has the following key/values: 
+ * The returned json string has the following key/values:
  *
- * id: chat id 
- * name: chat/group name 
- * color: color of this chat 
- * last-message-from: who sent the last message 
- * last-message-text: message (truncated) 
+ * id: chat id
+ * name: chat/group name
+ * color: color of this chat
+ * last-message-from: who sent the last message
+ * last-message-text: message (truncated)
  * last-message-state: DC_STATE* constant
- * last-message-date: 
- * avatar-path: path-to-blobfile 
+ * last-message-date:
+ * avatar-path: path-to-blobfile
  * is_verified: yes/no
 
  * @return a utf8-encoded json string containing all requested info. Must be freed using dc_str_unref().  NULL is never returned.
@@ -2989,15 +2989,15 @@ int             dc_msg_get_viewtype           (const dc_msg_t* msg);
  * Get the state of a message.
  *
  * Incoming message states:
- * - DC_STATE_IN_FRESH (10) - Incoming _fresh_ message. Fresh messages are not noticed nor seen and are typically shown in notifications. Use dc_get_fresh_msgs() to get all fresh messages.
- * - DC_STATE_IN_NOTICED (13) - Incoming _noticed_ message. Eg. chat opened but message not yet read - noticed messages are not counted as unread but did not marked as read nor resulted in MDNs. Use dc_marknoticed_chat() or dc_marknoticed_contact() to mark messages as being noticed.
- * - DC_STATE_IN_SEEN (16) - Incoming message, really _seen_ by the user. Marked as read on IMAP and MDN may be send. Use dc_markseen_msgs() to mark messages as being seen.
+ * - DC_STATE_IN_FRESH (10) - Incoming _fresh_ message. Fresh messages are neither noticed nor seen and are typically shown in notifications. Use dc_get_fresh_msgs() to get all fresh messages.
+ * - DC_STATE_IN_NOTICED (13) - Incoming _noticed_ message. E.g. chat opened but message not yet read - noticed messages are not counted as unread but did not marked as read nor resulted in MDNs. Use dc_marknoticed_chat() or dc_marknoticed_contact() to mark messages as being noticed.
+ * - DC_STATE_IN_SEEN (16) - Incoming message, really _seen_ by the user. Marked as read on IMAP and MDN may be sent. Use dc_markseen_msgs() to mark messages as being seen.
  *
  * Outgoing message states:
  * - DC_STATE_OUT_PREPARING (18) - For files which need time to be prepared before they can be sent,
  *   the message enters this state before DC_STATE_OUT_PENDING.
  * - DC_STATE_OUT_DRAFT (19) - Message saved as draft using dc_set_draft()
- * - DC_STATE_OUT_PENDING (20) - The user has send the "send" button but the
+ * - DC_STATE_OUT_PENDING (20) - The user has pressed the "send" button but the
  *   message is not yet sent and is pending in some way. Maybe we're offline (no checkmark).
  * - DC_STATE_OUT_FAILED (24) - _Unrecoverable_ error (_recoverable_ errors result in pending messages), you'll receive the event #DC_EVENT_MSG_FAILED.
  * - DC_STATE_OUT_DELIVERED (26) - Outgoing message successfully delivered to server (one checkmark). Note, that already delivered messages may get into the state DC_STATE_OUT_FAILED if we get such a hint from the server.
@@ -4167,30 +4167,30 @@ int64_t          dc_lot_get_timestamp     (const dc_lot_t* lot);
 #define DC_EVENT_IMAP_MESSAGE_MOVED   105
 
 /**
- * Emitted when an IMAP folder was emptied. 
+ * Emitted when an IMAP folder was emptied.
  *
  * @param data1 0
- * @param data2 (const char*) folder name. 
+ * @param data2 (const char*) folder name.
  *     Must not be unref'd or modified and is valid only until the callback returns.
  * @return 0
  */
 #define DC_EVENT_IMAP_FOLDER_EMPTIED  106
 
 /**
- * Emitted when a new blob file was successfully written 
+ * Emitted when a new blob file was successfully written
  *
  * @param data1 0
- * @param data2 (const char*) path name 
+ * @param data2 (const char*) path name
  *     Must not be unref'd or modified and is valid only until the callback returns.
  * @return 0
  */
 #define DC_EVENT_NEW_BLOB_FILE 150
 
 /**
- * Emitted when a blob file was successfully deleted 
+ * Emitted when a blob file was successfully deleted
  *
  * @param data1 0
- * @param data2 (const char*) path name 
+ * @param data2 (const char*) path name
  *     Must not be unref'd or modified and is valid only until the callback returns.
  * @return 0
  */

deltachat-ffi/src/dc_array.rs

@@ -2,7 +2,6 @@ use crate::location::Location;
 
 /* * the structure behind dc_array_t */
 #[derive(Debug, Clone)]
-#[allow(non_camel_case_types)]
 pub enum dc_array_t {
     Locations(Vec<Location>),
     Uint(Vec<u32>),

deltachat-ffi/src/lib.rs

@@ -4,12 +4,14 @@
     non_upper_case_globals,
     non_upper_case_globals,
     non_camel_case_types,
-    non_snake_case
+    clippy::missing_safety_doc,
+    clippy::expect_fun_call
 )]
 
 #[macro_use]
 extern crate human_panic;
 extern crate num_traits;
+extern crate serde_json;
 
 use std::collections::HashMap;
 use std::convert::TryInto;
@@ -121,74 +123,79 @@ impl ContextWrapper {
     }
 
     /// Translates the callback from the rust style to the C-style version.
-    unsafe fn translate_cb(&self, event: Event) -> uintptr_t {
-        match self.cb {
-            Some(ffi_cb) => {
-                let event_id = event.as_id();
-                match event {
-                    Event::Info(msg)
-                    | Event::SmtpConnected(msg)
-                    | Event::ImapConnected(msg)
-                    | Event::SmtpMessageSent(msg)
-                    | Event::ImapMessageDeleted(msg)
-                    | Event::ImapMessageMoved(msg)
-                    | Event::ImapFolderEmptied(msg)
-                    | Event::NewBlobFile(msg)
-                    | Event::DeletedBlobFile(msg)
-                    | Event::Warning(msg)
-                    | Event::Error(msg)
-                    | Event::ErrorNetwork(msg)
-                    | Event::ErrorSelfNotInGroup(msg) => {
-                        let data2 = CString::new(msg).unwrap_or_default();
-                        ffi_cb(self, event_id, 0, data2.as_ptr() as uintptr_t)
-                    }
-                    Event::MsgsChanged { chat_id, msg_id }
-                    | Event::IncomingMsg { chat_id, msg_id }
-                    | Event::MsgDelivered { chat_id, msg_id }
-                    | Event::MsgFailed { chat_id, msg_id }
-                    | Event::MsgRead { chat_id, msg_id } => ffi_cb(
+    unsafe fn translate_cb(&self, event: Event) {
+        if let Some(ffi_cb) = self.cb {
+            let event_id = event.as_id();
+            match event {
+                Event::Info(msg)
+                | Event::SmtpConnected(msg)
+                | Event::ImapConnected(msg)
+                | Event::SmtpMessageSent(msg)
+                | Event::ImapMessageDeleted(msg)
+                | Event::ImapMessageMoved(msg)
+                | Event::ImapFolderEmptied(msg)
+                | Event::NewBlobFile(msg)
+                | Event::DeletedBlobFile(msg)
+                | Event::Warning(msg)
+                | Event::Error(msg)
+                | Event::ErrorNetwork(msg)
+                | Event::ErrorSelfNotInGroup(msg) => {
+                    let data2 = CString::new(msg).unwrap_or_default();
+                    ffi_cb(self, event_id, 0, data2.as_ptr() as uintptr_t);
+                }
+                Event::MsgsChanged { chat_id, msg_id }
+                | Event::IncomingMsg { chat_id, msg_id }
+                | Event::MsgDelivered { chat_id, msg_id }
+                | Event::MsgFailed { chat_id, msg_id }
+                | Event::MsgRead { chat_id, msg_id } => {
+                    ffi_cb(
                         self,
                         event_id,
                         chat_id as uintptr_t,
                         msg_id.to_u32() as uintptr_t,
-                    ),
-                    Event::ChatModified(chat_id) => ffi_cb(self, event_id, chat_id as uintptr_t, 0),
-                    Event::ContactsChanged(id) | Event::LocationChanged(id) => {
-                        let id = id.unwrap_or_default();
-                        ffi_cb(self, event_id, id as uintptr_t, 0)
-                    }
-                    Event::ConfigureProgress(progress) | Event::ImexProgress(progress) => {
-                        ffi_cb(self, event_id, progress as uintptr_t, 0)
-                    }
-                    Event::ImexFileWritten(file) => {
-                        let data1 = file.to_c_string().unwrap_or_default();
-                        ffi_cb(self, event_id, data1.as_ptr() as uintptr_t, 0)
-                    }
-                    Event::SecurejoinInviterProgress {
-                        contact_id,
-                        progress,
-                    }
-                    | Event::SecurejoinJoinerProgress {
-                        contact_id,
-                        progress,
-                    } => ffi_cb(
+                    );
+                }
+                Event::ChatModified(chat_id) => {
+                    ffi_cb(self, event_id, chat_id as uintptr_t, 0);
+                }
+                Event::ContactsChanged(id) | Event::LocationChanged(id) => {
+                    let id = id.unwrap_or_default();
+                    ffi_cb(self, event_id, id as uintptr_t, 0);
+                }
+                Event::ConfigureProgress(progress) | Event::ImexProgress(progress) => {
+                    ffi_cb(self, event_id, progress as uintptr_t, 0);
+                }
+                Event::ImexFileWritten(file) => {
+                    let data1 = file.to_c_string().unwrap_or_default();
+                    ffi_cb(self, event_id, data1.as_ptr() as uintptr_t, 0);
+                }
+                Event::SecurejoinInviterProgress {
+                    contact_id,
+                    progress,
+                }
+                | Event::SecurejoinJoinerProgress {
+                    contact_id,
+                    progress,
+                } => {
+                    ffi_cb(
                         self,
                         event_id,
                         contact_id as uintptr_t,
                         progress as uintptr_t,
-                    ),
-                    Event::SecurejoinMemberAdded {
-                        chat_id,
-                        contact_id,
-                    } => ffi_cb(
+                    );
+                }
+                Event::SecurejoinMemberAdded {
+                    chat_id,
+                    contact_id,
+                } => {
+                    ffi_cb(
                         self,
                         event_id,
                         chat_id as uintptr_t,
                         contact_id as uintptr_t,
-                    ),
+                    );
                 }
             }
-            None => 0,
         }
     }
 }
@@ -408,7 +415,7 @@ fn render_info(
 ) -> std::result::Result<String, std::fmt::Error> {
     let mut res = String::new();
     for (key, value) in &info {
-        write!(&mut res, "{}={}\n", key, value)?;
+        writeln!(&mut res, "{}={}", key, value)?;
     }
 
     Ok(res)
@@ -509,7 +516,7 @@ pub unsafe extern "C" fn dc_interrupt_imap_idle(context: *mut dc_context_t) {
     }
     let ffi_context = &*context;
     ffi_context
-        .with_inner(|ctx| job::interrupt_inbox_idle(ctx, true))
+        .with_inner(|ctx| job::interrupt_inbox_idle(ctx))
         .unwrap_or(())
 }
 
@@ -1339,7 +1346,7 @@ pub unsafe extern "C" fn dc_get_mime_headers(
         .with_inner(|ctx| {
             message::get_mime_headers(ctx, MsgId::new(msg_id))
                 .map(|s| s.strdup())
-                .unwrap_or_else(|| ptr::null_mut())
+                .unwrap_or_else(ptr::null_mut)
         })
         .unwrap_or_else(|_| ptr::null_mut())
 }
@@ -1806,7 +1813,7 @@ pub unsafe extern "C" fn dc_get_securejoin_qr(
     ffi_context
         .with_inner(|ctx| {
             securejoin::dc_get_securejoin_qr(ctx, chat_id)
-                .unwrap_or("".to_string())
+                .unwrap_or_else(|| "".to_string())
                 .strdup()
         })
         .unwrap_or_else(|_| "".strdup())
@@ -2390,12 +2397,27 @@ pub unsafe extern "C" fn dc_chat_get_info_json(
     }
     let ffi_context = &*context;
     ffi_context
-        .with_inner(|ctx| match chat::get_info_json(ctx, chat_id) {
-            Ok(s) => s.strdup(),
-            Err(err) => {
-                error!(ctx, "get_info_json({}) returned: {}", chat_id, err);
-                return "".strdup();
-            }
+        .with_inner(|ctx| {
+            let chat = match chat::Chat::load_from_db(ctx, chat_id) {
+                Ok(chat) => chat,
+                Err(err) => {
+                    error!(ctx, "dc_get_chat_info_json() failed to load chat: {}", err);
+                    return "".strdup();
+                }
+            };
+            let info = match chat.get_info(ctx) {
+                Ok(info) => info,
+                Err(err) => {
+                    error!(
+                        ctx,
+                        "dc_get_chat_info_json() failed to get chat info: {}", err
+                    );
+                    return "".strdup();
+                }
+            };
+            serde_json::to_string(&info)
+                .unwrap_or_log_default(ctx, "dc_get_chat_info_json() failed to serialise to json")
+                .strdup()
         })
         .unwrap_or_else(|_| "".strdup())
 }
@@ -2579,7 +2601,7 @@ pub unsafe extern "C" fn dc_msg_get_filemime(msg: *mut dc_msg_t) -> *mut libc::c
     if let Some(x) = ffi_msg.message.get_filemime() {
         x.strdup()
     } else {
-        return dc_strdup(ptr::null());
+        dc_strdup(ptr::null())
     }
 }
 
@@ -2971,7 +2993,7 @@ pub unsafe extern "C" fn dc_contact_get_profile_image(
                 .contact
                 .get_profile_image(ctx)
                 .map(|p| p.to_string_lossy().strdup())
-                .unwrap_or_else(|| std::ptr::null_mut())
+                .unwrap_or_else(std::ptr::null_mut)
         })
         .unwrap_or_else(|_| ptr::null_mut())
 }

deltachat-ffi/src/providers.rs

@@ -86,8 +86,6 @@ pub unsafe extern "C" fn dc_provider_get_status(provider: *const dc_provider_t)
 }
 
 #[no_mangle]
-pub unsafe extern "C" fn dc_provider_unref(_provider: *const dc_provider_t) {
-    ()
-}
+pub unsafe extern "C" fn dc_provider_unref(_provider: *const dc_provider_t) {}
 
 // TODO expose general provider overview url?

examples/repl/cmdline.rs

@@ -20,14 +20,14 @@ use deltachat::qr::*;
 use deltachat::sql;
 use deltachat::Event;
 
-/// Reset database tables. This function is called from Core cmdline.
+/// Reset database tables.
 /// Argument is a bitmask, executing single or multiple actions in one call.
 /// e.g. bitmask 7 triggers actions definded with bits 1, 2 and 4.
-pub fn dc_reset_tables(context: &Context, bits: i32) -> i32 {
-    info!(context, "Resetting tables ({})...", bits);
+fn dc_reset_tables(context: &Context, bits: i32) -> i32 {
+    println!("Resetting tables ({})...", bits);
     if 0 != bits & 1 {
         sql::execute(context, &context.sql, "DELETE FROM jobs;", params![]).unwrap();
-        info!(context, "(1) Jobs reset.");
+        println!("(1) Jobs reset.");
     }
     if 0 != bits & 2 {
         sql::execute(
@@ -37,11 +37,11 @@ pub fn dc_reset_tables(context: &Context, bits: i32) -> i32 {
             params![],
         )
         .unwrap();
-        info!(context, "(2) Peerstates reset.");
+        println!("(2) Peerstates reset.");
     }
     if 0 != bits & 4 {
         sql::execute(context, &context.sql, "DELETE FROM keypairs;", params![]).unwrap();
-        info!(context, "(4) Private keypairs reset.");
+        println!("(4) Private keypairs reset.");
     }
     if 0 != bits & 8 {
         sql::execute(
@@ -80,7 +80,7 @@ pub fn dc_reset_tables(context: &Context, bits: i32) -> i32 {
         )
         .unwrap();
         sql::execute(context, &context.sql, "DELETE FROM leftgrps;", params![]).unwrap();
-        info!(context, "(8) Rest but server config reset.");
+        println!("(8) Rest but server config reset.");
     }
 
     context.call_cb(Event::MsgsChanged {
@@ -155,7 +155,7 @@ fn poke_spec(context: &Context, spec: Option<&str>) -> libc::c_int {
                 let name = name_f.to_string_lossy();
                 if name.ends_with(".eml") {
                     let path_plus_name = format!("{}/{}", &real_spec, name);
-                    info!(context, "Import: {}", path_plus_name);
+                    println!("Import: {}", path_plus_name);
                     if dc_poke_eml_file(context, path_plus_name).is_ok() {
                         read_cnt += 1
                     }
@@ -163,10 +163,7 @@ fn poke_spec(context: &Context, spec: Option<&str>) -> libc::c_int {
             }
         }
     }
-    info!(
-        context,
-        "Import: {} items read from \"{}\".", read_cnt, &real_spec
-    );
+    println!("Import: {} items read from \"{}\".", read_cnt, &real_spec);
     if read_cnt > 0 {
         context.call_cb(Event::MsgsChanged {
             chat_id: 0,
@@ -190,8 +187,7 @@ fn log_msg(context: &Context, prefix: impl AsRef<str>, msg: &Message) {
     };
     let temp2 = dc_timestamp_to_str(msg.get_timestamp());
     let msgtext = msg.get_text();
-    info!(
-        context,
+    println!(
         "{}{}{}{}: {} (Contact#{}): {} {}{}{}{}{} [{}]",
         prefix.as_ref(),
         msg.get_id(),
@@ -225,16 +221,14 @@ fn log_msglist(context: &Context, msglist: &Vec<MsgId>) -> Result<(), Error> {
     let mut lines_out = 0;
     for &msg_id in msglist {
         if msg_id.is_daymarker() {
-            info!(
-                context,
+            println!(
                 "--------------------------------------------------------------------------------"
             );
 
             lines_out += 1
         } else if !msg_id.is_special() {
             if lines_out == 0 {
-                info!(
-                    context,
+                println!(
                     "--------------------------------------------------------------------------------",
                 );
                 lines_out += 1
@@ -244,8 +238,7 @@ fn log_msglist(context: &Context, msglist: &Vec<MsgId>) -> Result<(), Error> {
         }
     }
     if lines_out > 0 {
-        info!(
-            context,
+        println!(
             "--------------------------------------------------------------------------------"
         );
     }
@@ -295,7 +288,7 @@ fn log_contactlist(context: &Context, contacts: &Vec<u32>) {
                 );
             }
 
-            info!(context, "Contact#{}: {}{}", contact_id, line, line2);
+            println!("Contact#{}: {}{}", contact_id, line, line2);
         }
     }
 }
@@ -491,7 +484,7 @@ pub fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::Error> {
             println!("{:#?}", context.get_info());
         }
         "interrupt" => {
-            interrupt_inbox_idle(context, true);
+            interrupt_inbox_idle(context);
         }
         "maybenetwork" => {
             maybe_network(context);
@@ -510,15 +503,13 @@ pub fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::Error> {
 
             let cnt = chatlist.len();
             if cnt > 0 {
-                info!(
-                    context,
+                println!(
                     "================================================================================"
                 );
 
                 for i in (0..cnt).rev() {
                     let chat = Chat::load_from_db(context, chatlist.get_chat_id(i))?;
-                    info!(
-                        context,
+                    println!(
                         "{}#{}: {} [{} fresh]",
                         chat_prefix(&chat),
                         chat.get_id(),
@@ -540,8 +531,7 @@ pub fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::Error> {
                     let timestr = dc_timestamp_to_str(lot.get_timestamp());
                     let text1 = lot.get_text1();
                     let text2 = lot.get_text2();
-                    info!(
-                        context,
+                    println!(
                         "{}{}{}{} [{}]{}",
                         text1.unwrap_or(""),
                         if text1.is_some() { ": " } else { "" },
@@ -554,14 +544,13 @@ pub fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::Error> {
                             ""
                         },
                     );
-                    info!(
-                        context,
+                    println!(
                         "================================================================================"
                     );
                 }
             }
             if location::is_sending_locations_to_chat(context, 0) {
-                info!(context, "Location streaming enabled.");
+                println!("Location streaming enabled.");
             }
             println!("{} chats", cnt);
         }
@@ -589,8 +578,7 @@ pub fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::Error> {
             } else {
                 format!("{} member(s)", members.len())
             };
-            info!(
-                context,
+            println!(
                 "{}#{}: {} [{}]{}{}",
                 chat_prefix(sel_chat),
                 sel_chat.get_id(),
@@ -693,7 +681,7 @@ pub fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::Error> {
             ensure!(sel_chat.is_some(), "No chat selected.");
 
             let contacts = chat::get_chat_contacts(context, sel_chat.as_ref().unwrap().get_id());
-            info!(context, "Memberlist:");
+            println!("Memberlist:");
 
             log_contactlist(context, &contacts);
             println!(
@@ -719,8 +707,7 @@ pub fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::Error> {
             let default_marker = "-".to_string();
             for location in &locations {
                 let marker = location.marker.as_ref().unwrap_or(&default_marker);
-                info!(
-                    context,
+                println!(
                     "Loc#{}: {}: lat={} lng={} acc={} Chat#{} Contact#{} {} {}",
                     location.location_id,
                     dc_timestamp_to_str(location.timestamp),
@@ -734,7 +721,7 @@ pub fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::Error> {
                 );
             }
             if locations.is_empty() {
-                info!(context, "No locations.");
+                println!("No locations.");
             }
         }
         "sendlocations" => {

examples/repl/main.rs

@@ -41,7 +41,7 @@ use self::cmdline::*;
 
 // Event Handler
 
-fn receive_event(_context: &Context, event: Event) -> libc::uintptr_t {
+fn receive_event(_context: &Context, event: Event) {
     match event {
         Event::Info(msg) => {
             /* do not show the event as this would fill the screen */
@@ -111,8 +111,6 @@ fn receive_event(_context: &Context, event: Event) -> libc::uintptr_t {
             print!("\x1b[33m{{Received {:?}}}\n\x1b[0m", event);
         }
     }
-
-    0
 }
 
 // Threads for waiting for messages and for jobs
@@ -202,7 +200,7 @@ fn stop_threads(context: &Context) {
         println!("Stopping threads");
         IS_RUNNING.store(false, Ordering::Relaxed);
 
-        interrupt_inbox_idle(context, true);
+        interrupt_inbox_idle(context);
         interrupt_mvbox_idle(context);
         interrupt_sentbox_idle(context);
         interrupt_smtp_idle(context);

examples/simple.rs

@@ -16,21 +16,18 @@ use deltachat::job::{
 };
 use deltachat::Event;
 
-fn cb(_ctx: &Context, event: Event) -> usize {
+fn cb(_ctx: &Context, event: Event) {
     print!("[{:?}]", event);
 
     match event {
         Event::ConfigureProgress(progress) => {
             print!("  progress: {}\n", progress);
-            0
         }
         Event::Info(msg) | Event::Warning(msg) | Event::Error(msg) | Event::ErrorNetwork(msg) => {
             print!("  {}\n", msg);
-            0
         }
         _ => {
             print!("\n");
-            0
         }
     }
 }
@@ -104,7 +101,7 @@ fn main() {
     println!("stopping threads");
 
     *running.write().unwrap() = false;
-    deltachat::job::interrupt_inbox_idle(&ctx, true);
+    deltachat::job::interrupt_inbox_idle(&ctx);
     deltachat::job::interrupt_smtp_idle(&ctx);
 
     println!("joining");

python/README.rst

@@ -6,8 +6,81 @@ This package provides bindings to the deltachat-core_ Rust -library
 which provides imap/smtp/crypto handling as well as chat/group/messages
 handling to Android, Desktop and IO user interfaces.
 
-Installing pre-built packages (linux-only)
-==========================================
+
+Installing bindings from source (Updated: 21-Dec-2019)
+=========================================================
+
+Install Rust and Cargo first.  Deltachat needs a specific nightly
+version, the easiest is probably to first install Rust stable from
+rustup and then use this to install the correct nightly version.
+
+Install rustup using::
+
+   curl https://sh.rustup.rs -sSf | sh
+
+GIT clone the repo and use rustup to check the correct nightly version
+is available, if you do not have the right nightly version rustup will
+download and install it::
+
+   git clone https://github.com/deltachat/deltachat-core-rust
+   cd deltachat-core-rust
+   rustup show
+
+To install the python bindings make sure you have python installed, a
+recent 3.x version will also come with the required venv module.
+E.g. on Debian-based systems `apt install python3 python3-pip
+python3-venv` should give you a usable python installation.  If you
+prefer you can also
+`Install virtualenv <https://virtualenv.pypa.io/en/stable/installation/>`_
+as an alternative to `venv`.
+
+Ensure you are in the deltachat-core-rust/python directory, create the
+vivrtual environment and activate it in your shell::
+
+   cd python
+   python3 -m venv venv  # or: virtualenv venv
+   source venv/bin/activate
+
+You should now be able to build the python bindings using the supplied
+script::
+
+   ./install_python_bindings.py
+
+The installation might take a while, depending on your machine.
+The bindings will be installed in release mode but with debug symbols.
+The release mode is necessary because some tests generate RSA keys
+which is prohibitively slow in debug mode.
+
+After successful binding installation you can install a few more
+python packages before finally running the tests::
+
+    python -m pip install pytest pytest-timeout pytest-rerunfailures requests
+    pytest -v tests
+
+
+running "live" tests (experimental)
+-----------------------------------
+
+If you want to run "liveconfig" functional tests you can set
+``DCC_PY_LIVECONFIG`` to:
+
+- a particular https-url that you can ask for from the delta
+  chat devs.
+
+- or the path of a file that contains two lines, each describing
+  via "addr=... mail_pw=..." a test account login that will
+  be used for the live tests.
+
+With ``DCC_PY_LIVECONFIG`` set pytest invocations will use real
+e-mail accounts and run through all functional "liveconfig" tests.
+
+
+============================================================================================================================
+(21-Dec-2019) THE BELOW WHEELS ARE CURRENTLY NOT WORKING/BROKEN, COMPILE FROM SOURCE USING ABOVE INSTRUCTIONS INSTEAD 
+============================================================================================================================
+
+Installing pre-built packages (linux-only)  (OUTDATED)
+========================================================
 
 If you have a linux system you may install the ``deltachat`` binary "wheel" package
 without any "build-from-source" steps.
@@ -31,8 +104,8 @@ without any "build-from-source" steps.
         python -c "import deltachat"
 
 
-Installing a wheel from a PR/branch
----------------------------------------
+Installing a wheel from a PR/branch    (OUTDATED)
+-------------------------------------------------
 
 For Linux, we automatically build wheels for all github PR branches
 and push them to a python package index. To install the latest github ``master`` branch::
@@ -46,62 +119,7 @@ and push them to a python package index. To install the latest github ``master``
     `in contact with us <https://delta.chat/en/contribute>`_.
 
 
-Installing bindings from source
-===============================
 
-If you can't use "binary" method above then you need to compile
-to core deltachat library::
-
-    git clone https://github.com/deltachat/deltachat-core-rust
-    cd deltachat-core-rust
-    cd python
-
-If you don't have one active, create and activate a python "virtualenv":
-
-    python virtualenv venv  # or python -m venv
-    source venv/bin/activate
-
-Afterwards ``which python`` tells you that it comes out of the "venv"
-directory that contains all python install artifacts. Let's first
-install test tools::
-
-    pip install pytest pytest-timeout pytest-rerunfailures requests
-
-then cargo-build and install the deltachat bindings::
-
-    python install_python_bindings.py
-
-The bindings will be installed in release mode but with debug symbols.
-The release mode is necessary because some tests generate RSA keys
-which is prohibitively slow in debug mode.
-
-After successful binding installation you can finally run the tests::
-
-    pytest -v tests
-
-.. note::
-
-    Some tests are sometimes failing/hanging because of
-    https://github.com/deltachat/deltachat-core-rust/issues/331
-    and
-    https://github.com/deltachat/deltachat-core-rust/issues/326
-
-
-running "live" tests (experimental)
------------------------------------
-
-If you want to run "liveconfig" functional tests you can set
-``DCC_PY_LIVECONFIG`` to:
-
-- a particular https-url that you can ask for from the delta
-  chat devs.
-
-- or the path of a file that contains two lines, each describing
-  via "addr=... mail_pw=..." a test account login that will
-  be used for the live tests.
-
-With ``DCC_PY_LIVECONFIG`` set pytest invocations will use real
-e-mail accounts and run through all functional "liveconfig" tests.
 
 
 

python/src/deltachat/account.py

@@ -26,7 +26,7 @@ class Account(object):
     by the underlying deltachat core library.  All public Account methods are
     meant to be memory-safe and return memory-safe objects.
     """
-    def __init__(self, db_path, logid=None, eventlogging=True, debug=True):
+    def __init__(self, db_path, logid=None, eventlogging=True, os_name=None, debug=True):
         """ initialize account object.
 
         :param db_path: a path to the account database. The database
@@ -34,10 +34,11 @@ class Account(object):
         :param logid: an optional logging prefix that should be used with
                       the default internal logging.
         :param eventlogging: if False no eventlogging and no context callback will be configured
+        :param os_name: this will be put to the X-Mailer header in outgoing messages
         :param debug: turn on debug logging for events.
         """
         self._dc_context = ffi.gc(
-            lib.dc_context_new(lib.py_dc_callback, ffi.NULL, ffi.NULL),
+            lib.dc_context_new(lib.py_dc_callback, ffi.NULL, as_dc_charpointer(os_name)),
             _destroy_dc_context,
         )
         if eventlogging:

python/tests/test_account.py

@@ -16,6 +16,14 @@ class TestOfflineAccountBasic:
         with pytest.raises(ValueError):
             Account(p.strpath)
 
+    def test_os_name(self, tmpdir):
+        p = tmpdir.join("hello.db")
+        # we can't easily test if os_name is used in X-Mailer
+        # outgoing messages without a full Online test
+        # but we at least check Account accepts the arg
+        ac1 = Account(p.strpath, os_name="solarpunk")
+        ac1.get_info()
+
     def test_getinfo(self, acfactory):
         ac1 = acfactory.get_unconfigured_account()
         d = ac1.get_info()
@@ -670,14 +678,26 @@ class TestOnlineAccount:
         chat2b.mark_noticed()
         assert chat2b.count_fresh_messages() == 0
 
-        lp.sec("mark message as seen on ac2, wait for changes on ac1")
-        ac2.mark_seen_messages([msg_in])
+        ac2._evlogger.consume_events()
+
+        lp.sec("sending a second message from ac1 to ac2")
+        msg_out2 = chat.send_text("message2")
+
+        lp.sec("wait for ac2 to receive second message")
+        ev = ac2._evlogger.get_matching("DC_EVENT_INCOMING_MSG")
+        assert ev[2] == msg_out2.id
+        msg_in2 = ac2.get_message_by_id(msg_out2.id)
+
+        lp.sec("mark messages as seen on ac2, wait for changes on ac1")
+        ac2.mark_seen_messages([msg_in, msg_in2])
         lp.step("1")
-        ev = ac1._evlogger.get_matching("DC_EVENT_MSG_READ")
-        assert ev[1] > const.DC_CHAT_ID_LAST_SPECIAL
-        assert ev[2] > const.DC_MSG_ID_LAST_SPECIAL
+        for i in range(2):
+            ev = ac1._evlogger.get_matching("DC_EVENT_MSG_READ")
+            assert ev[1] > const.DC_CHAT_ID_LAST_SPECIAL
+            assert ev[2] > const.DC_MSG_ID_LAST_SPECIAL
         lp.step("2")
         assert msg_out.is_out_mdn_received()
+        assert msg_out2.is_out_mdn_received()
 
         lp.sec("check that a second call to mark_seen does not create change or smtp job")
         ac2._evlogger.consume_events()
@@ -687,6 +707,41 @@ class TestOnlineAccount:
         except queue.Empty:
             pass  # mark_seen_messages() has generated events before it returns
 
+    def test_mdn_asymetric(self, acfactory, lp):
+        ac1, ac2 = acfactory.get_two_online_accounts()
+
+        lp.sec("ac1: create chat with ac2")
+        chat = self.get_chat(ac1, ac2, both_created=True)
+
+        # make sure mdns are enabled (usually enabled by default already)
+        ac1.set_config("mdns_enabled", "1")
+        ac2.set_config("mdns_enabled", "1")
+
+        lp.sec("sending text message from ac1 to ac2")
+        msg_out = chat.send_text("message1")
+
+        assert len(chat.get_messages()) == 1
+
+        lp.sec("disable ac1 MDNs")
+        ac1.set_config("mdns_enabled", "0")
+
+        lp.sec("wait for ac2 to receive message")
+        msg = ac2.wait_next_incoming_message()
+
+        assert len(msg.chat.get_messages()) == 1
+
+        lp.sec("ac2: mark incoming message as seen")
+        ac2.mark_seen_messages([msg])
+
+        lp.sec("ac1: waiting for incoming activity")
+        # MDN should be moved even though MDNs are already disabled
+        ac1._evlogger.get_matching("DC_EVENT_IMAP_MESSAGE_MOVED")
+
+        assert len(chat.get_messages()) == 1
+
+        # MDN is received even though MDNs are already disabled
+        assert msg_out.is_out_mdn_received()
+
     def test_send_and_receive_will_encrypt_decrypt(self, acfactory, lp):
         ac1, ac2 = acfactory.get_two_online_accounts()
 
@@ -786,7 +841,21 @@ class TestOnlineAccount:
         print("ac1: e2ee_enabled={}".format(ac1.get_config("e2ee_enabled")))
         print("ac2: e2ee_enabled={}".format(ac2.get_config("e2ee_enabled")))
         ac1.set_config("e2ee_enabled", "0")
-        chat.send_text("message2 -- should be encrypted")
+
+        # Set unprepared and unencrypted draft to test that it is not
+        # taken into account when determining whether last message is
+        # encrypted.
+        msg_draft = Message.new_empty(ac1, "text")
+        msg_draft.set_text("message2 -- should be encrypted")
+        chat.set_draft(msg_draft)
+
+        # Get the draft, prepare and send it.
+        msg_draft = chat.get_draft()
+        msg_out = chat.prepare_message(msg_draft)
+        chat.send_prepared(msg_out)
+
+        chat.set_draft(None)
+        assert chat.get_draft() is None
 
         lp.sec("wait for ac2 to receive message")
         ev = ac2._evlogger.get_matching("DC_EVENT_INCOMING_MSG")
@@ -1134,29 +1203,46 @@ class TestOnlineAccount:
 class TestGroupStressTests:
     def test_group_many_members_add_leave_remove(self, acfactory, lp):
         lp.sec("creating and configuring five accounts")
-        ac1 = acfactory.get_online_configuring_account()
-        accounts = [acfactory.get_online_configuring_account() for i in range(3)]
-        wait_configuration_progress(ac1, 1000)
+        accounts = [acfactory.get_online_configuring_account() for i in range(5)]
         for acc in accounts:
             wait_configuration_progress(acc, 1000)
+        ac1 = accounts.pop()
+
+        lp.sec("ac1: setting up contacts with 4 other members")
+        contacts = []
+        for acc, name in zip(accounts, list("äöüsr")):
+            contact = ac1.create_contact(acc.get_config("addr"), name=name)
+            contacts.append(contact)
+
+            # make sure we accept the "hi" message
+            ac1.create_chat_by_contact(contact)
+
+            # make sure the other side accepts our messages
+            c1 = acc.create_contact(ac1.get_config("addr"), "ä member")
+            chat1 = acc.create_chat_by_contact(c1)
+
+            # send a message to get the contact key via autocrypt header
+            chat1.send_text("hi")
+            msg = ac1.wait_next_incoming_message()
+            assert msg.text == "hi"
+
+        # Save fifth account for later
+        ac5 = accounts.pop()
+        contact5 = contacts.pop()
 
         lp.sec("ac1: creating group chat with 3 other members")
         chat = ac1.create_group_chat("title1")
-        contacts = []
-        chars = list("äöüsr")
-        for acc in accounts:
-            contact = ac1.create_contact(acc.get_config("addr"), name=chars.pop())
-            contacts.append(contact)
+        for contact in contacts:
             chat.add_contact(contact)
-            # make sure the other side accepts our messages
-            c1 = acc.create_contact(ac1.get_config("addr"), "ä member")
-            acc.create_chat_by_contact(c1)
-
         assert not chat.is_promoted()
 
         lp.sec("ac1: send mesage to new group chat")
-        chat.send_text("hello")
+        msg = chat.send_text("hello")
         assert chat.is_promoted()
+        assert msg.is_encrypted()
+
+        gossiped_timestamp = chat.get_summary()["gossiped_timestamp"]
+        assert gossiped_timestamp > 0
 
         num_contacts = len(chat.get_contacts())
         assert num_contacts == 3 + 1
@@ -1168,14 +1254,49 @@ class TestGroupStressTests:
         print("chat is", msg.chat)
         assert len(msg.chat.get_contacts()) == 4
 
-        lp.sec("ac1: removing one contacts and checking things are right")
-        to_remove = msg.chat.get_contacts()[-1]
+        lp.sec("ac3: checking that 'ac4' is a known contact")
+        ac3 = accounts[1]
+        msg3 = ac3.wait_next_incoming_message()
+        assert msg3.text == "hello"
+        ac3_contacts = ac3.get_contacts()
+        assert len(ac3_contacts) == 3
+        ac4_contacts = ac3.get_contacts(query=accounts[2].get_config("addr"))
+        assert len(ac4_contacts) == 1
+
+        lp.sec("ac2: removing one contact")
+        to_remove = contacts[-1]
         msg.chat.remove_contact(to_remove)
 
+        lp.sec("ac1: receiving system message about contact removal")
         sysmsg = ac1.wait_next_incoming_message()
         assert to_remove.addr in sysmsg.text
         assert len(sysmsg.chat.get_contacts()) == 3
 
+        # Receiving message about removed contact does not reset gossip
+        assert chat.get_summary()["gossiped_timestamp"] == gossiped_timestamp
+
+        lp.sec("ac1: sending another message to the chat")
+        chat.send_text("hello2")
+        msg = ac2.wait_next_incoming_message()
+        assert msg.text == "hello2"
+        assert chat.get_summary()["gossiped_timestamp"] == gossiped_timestamp
+
+        lp.sec("ac1: adding fifth member to the chat")
+        chat.add_contact(contact5)
+        # Additng contact to chat resets gossiped_timestamp
+        assert chat.get_summary()["gossiped_timestamp"] >= gossiped_timestamp
+
+        lp.sec("ac2: receiving system message about contact addition")
+        sysmsg = ac2.wait_next_incoming_message()
+        assert contact5.addr in sysmsg.text
+        assert len(sysmsg.chat.get_contacts()) == 4
+
+        lp.sec("ac5: waiting for message about addition to the chat")
+        sysmsg = ac5.wait_next_incoming_message()
+        msg = sysmsg.chat.send_text("hello!")
+        # Message should be encrypted because keys of other members are gossiped
+        assert msg.is_encrypted()
+
 
 class TestOnlineConfigureFails:
     def test_invalid_password(self, acfactory):

set_core_version.py

@@ -55,6 +55,7 @@ if __name__ == "__main__":
     replace_toml_version("Cargo.toml", newversion)
     replace_toml_version("deltachat-ffi/Cargo.toml", newversion)
 
+    subprocess.call(["cargo", "check"])
     subprocess.call(["git", "add", "-u"])
     # subprocess.call(["cargo", "update", "-p", "deltachat"])
 

spec.md

@@ -153,8 +153,8 @@ The message-id MUST have the format `Gr.<group-id>.<unique data>`.
     Hello group - this group contains three members
 
 Messengers adding the member list in the form `Name <email-address>`
-MUST take care only to spread the names authorized by the contacts themselves.
-Otherwise, names as _Daddy_ or _Honey_ may be spread
+MUST take care only to distribute the names authorized by the contacts themselves.
+Otherwise, names as _Daddy_ or _Honey_ may be distributed
 (this issue is also true for normal MUAs, however,
 for more contact- and chat-centralized apps
 such situations happen more frequently).
@@ -288,7 +288,7 @@ to add a `Chat-Group-Avatar` only on image changes.
 
 # Set profile image
 
-A user MAY have a profile-image that MAY be spread to their contacts.
+A user MAY have a profile-image that MAY be distributed to their contacts.
 To change or set the profile-image,
 the messenger MUST attach an image file to a message
 and MUST add the header `Chat-User-Avatar`
@@ -297,7 +297,7 @@ with the value set to the image name.
 To remove the profile-image,
 the messenger MUST add the header `Chat-User-Avatar: 0`.
 
-To spread the image,
+To distribute the image,
 the messenger MAY send the profile image
 together with the next mail to a given contact
 (to do this only once,

src/blob.rs

@@ -6,9 +6,13 @@ use std::fs;
 use std::io::Write;
 use std::path::{Path, PathBuf};
 
+use self::image::GenericImageView;
+use crate::constants::AVATAR_SIZE;
 use crate::context::Context;
 use crate::events::Event;
 
+extern crate image;
+
 /// Represents a file in the blob directory.
 ///
 /// The object has a name, which will always be valid UTF-8.  Having a
@@ -349,6 +353,31 @@ impl<'a> BlobObject<'a> {
         }
         true
     }
+
+    pub fn recode_to_avatar_size(&self, context: &Context) -> Result<(), BlobError> {
+        let blob_abs = self.to_abs_path();
+        let img = image::open(&blob_abs).map_err(|err| BlobError::RecodeFailure {
+            blobdir: context.get_blobdir().to_path_buf(),
+            blobname: blob_abs.to_str().unwrap_or_default().to_string(),
+            cause: err,
+            backtrace: failure::Backtrace::new(),
+        })?;
+
+        if img.width() <= AVATAR_SIZE && img.height() <= AVATAR_SIZE {
+            return Ok(());
+        }
+
+        let img = img.thumbnail(AVATAR_SIZE, AVATAR_SIZE);
+
+        img.save(&blob_abs).map_err(|err| BlobError::WriteFailure {
+            blobdir: context.get_blobdir().to_path_buf(),
+            blobname: blob_abs.to_str().unwrap_or_default().to_string(),
+            cause: err,
+            backtrace: failure::Backtrace::new(),
+        })?;
+
+        Ok(())
+    }
 }
 
 impl<'a> fmt::Display for BlobObject<'a> {
@@ -382,6 +411,13 @@ pub enum BlobError {
         cause: std::io::Error,
         backtrace: failure::Backtrace,
     },
+    RecodeFailure {
+        blobdir: PathBuf,
+        blobname: String,
+        #[cause]
+        cause: image::ImageError,
+        backtrace: failure::Backtrace,
+    },
     WrongBlobdir {
         blobdir: PathBuf,
         src: PathBuf,
@@ -429,6 +465,9 @@ impl fmt::Display for BlobError {
                 blobname,
                 blobdir.display(),
             ),
+            BlobError::RecodeFailure {
+                blobdir, blobname, ..
+            } => write!(f, "Failed to recode {} in {}", blobname, blobdir.display(),),
             BlobError::WrongBlobdir { blobdir, src, .. } => write!(
                 f,
                 "File path {} is not in blobdir {}",

src/chat.rs

@@ -4,7 +4,7 @@ use std::path::{Path, PathBuf};
 
 use itertools::Itertools;
 use num_traits::FromPrimitive;
-use serde_json::json;
+use serde::{Deserialize, Serialize};
 
 use crate::blob::{BlobError, BlobObject};
 use crate::chatlist::*;
@@ -19,7 +19,7 @@ use crate::job::*;
 use crate::message::{self, InvalidMsgId, Message, MessageState, MsgId};
 use crate::mimeparser::SystemMessage;
 use crate::param::*;
-use crate::sql::{self, Sql};
+use crate::sql;
 use crate::stock::StockMessage;
 
 /// An object representing a single chat in memory.
@@ -91,8 +91,8 @@ impl Chat {
                             let contacts = get_chat_contacts(context, chat.id);
                             let mut chat_name = "Err [Name not found]".to_owned();
 
-                            if !(*contacts).is_empty() {
-                                if let Ok(contact) = Contact::get_by_id(context, contacts[0]) {
+                            if let Some(contact_id) = contacts.first() {
+                                if let Ok(contact) = Contact::get_by_id(context, *contact_id) {
                                     chat_name = contact.get_display_name().to_owned();
                                 }
                             }
@@ -116,10 +116,12 @@ impl Chat {
         self.param.exists(Param::Selftalk)
     }
 
+    /// Returns true if chat is a device chat.
     pub fn is_device_talk(&self) -> bool {
         self.param.exists(Param::Devicetalk)
     }
 
+    /// Returns true if user can send messages to this chat.
     pub fn can_send(&self) -> bool {
         self.id > DC_CHAT_ID_LAST_SPECIAL && !self.is_device_talk()
     }
@@ -134,14 +136,17 @@ impl Chat {
         Ok(())
     }
 
+    /// Returns chat ID.
     pub fn get_id(&self) -> u32 {
         self.id
     }
 
+    /// Returns chat type.
     pub fn get_type(&self) -> Chattype {
         self.typ
     }
 
+    /// Returns chat name.
     pub fn get_name(&self) -> &str {
         &self.name
     }
@@ -167,7 +172,7 @@ impl Chat {
         }
 
         if self.typ == Chattype::Group || self.typ == Chattype::VerifiedGroup {
-            if self.id == 1 {
+            if self.id == DC_CHAT_ID_DEADDROP {
                 return context.stock_str(StockMessage::DeadDrop).into();
             }
             let cnt = get_chat_contact_cnt(context, self.id);
@@ -177,24 +182,46 @@ impl Chat {
         "Err".to_string()
     }
 
-    pub fn get_parent_mime_headers(&self, context: &Context) -> Option<(String, String, String)> {
+    fn parent_query(fields: &str) -> String {
+        // Check for server_uid guarantees that we don't
+        // select a draft or undelivered message.
+        format!(
+            "SELECT {} \
+             FROM msgs WHERE chat_id=?1 AND server_uid!=0 \
+             ORDER BY timestamp DESC, id DESC \
+             LIMIT 1;",
+            fields
+        )
+    }
+
+    fn get_parent_mime_headers(&self, context: &Context) -> Option<(String, String, String)> {
         let collect = |row: &rusqlite::Row| Ok((row.get(0)?, row.get(1)?, row.get(2)?));
-        let params = params![self.id as i32, DC_CONTACT_ID_SELF as i32];
+        let params = params![self.id as i32];
         let sql = &context.sql;
 
-        // use the last messsage of another user in the group as the parent
-        let main_query = "SELECT rfc724_mid, mime_in_reply_to, mime_references \
-                          FROM msgs WHERE chat_id=?1 AND timestamp=(SELECT max(timestamp) \
-                          FROM msgs WHERE chat_id=?1 AND from_id!=?2);";
+        let query = Self::parent_query("rfc724_mid, mime_in_reply_to, mime_references");
 
-        // there are no messages of other users - use the first message if SELF as parent
-        let fallback_query = "SELECT rfc724_mid, mime_in_reply_to, mime_references \
-                              FROM msgs WHERE chat_id=?1 AND timestamp=(SELECT min(timestamp) \
-                              FROM msgs WHERE chat_id=?1 AND from_id==?2);";
+        sql.query_row(&query, params, collect).ok()
+    }
 
-        sql.query_row(main_query, params, collect)
-            .or_else(|_| sql.query_row(fallback_query, params, collect))
-            .ok()
+    fn parent_is_encrypted(&self, context: &Context) -> bool {
+        let sql = &context.sql;
+        let params = params![self.id as i32];
+        let query = Self::parent_query("param");
+
+        let packed: Option<String> = sql.query_get_value(context, &query, params);
+
+        if let Some(ref packed) = packed {
+            match packed.parse::<Params>() {
+                Ok(param) => param.exists(Param::GuaranteeE2ee),
+                Err(err) => {
+                    error!(context, "invalid params stored: '{}', {:?}", packed, err);
+                    false
+                }
+            }
+        } else {
+            false
+        }
     }
 
     pub fn get_profile_image(&self, context: &Context) -> Option<PathBuf> {
@@ -204,8 +231,8 @@ impl Chat {
             }
         } else if self.typ == Chattype::Single {
             let contacts = get_chat_contacts(context, self.id);
-            if !contacts.is_empty() {
-                if let Ok(contact) = Contact::get_by_id(context, contacts[0]) {
+            if let Some(contact_id) = contacts.first() {
+                if let Ok(contact) = Contact::get_by_id(context, *contact_id) {
                     return contact.get_profile_image(context);
                 }
             }
@@ -223,8 +250,8 @@ impl Chat {
 
         if self.typ == Chattype::Single {
             let contacts = get_chat_contacts(context, self.id);
-            if !contacts.is_empty() {
-                if let Ok(contact) = Contact::get_by_id(context, contacts[0]) {
+            if let Some(contact_id) = contacts.first() {
+                if let Ok(contact) = Contact::get_by_id(context, *contact_id) {
                     color = contact.get_color();
                 }
             }
@@ -235,6 +262,30 @@ impl Chat {
         color
     }
 
+    /// Returns a struct describing the current state of the chat.
+    ///
+    /// This is somewhat experimental, even more so than the rest of
+    /// deltachat, and the data returned is still subject to change.
+    pub fn get_info(&self, context: &Context) -> Result<ChatInfo, Error> {
+        let draft = match get_draft(context, self.id)? {
+            Some(message) => message.text.unwrap_or_else(String::new),
+            _ => String::new(),
+        };
+        Ok(ChatInfo {
+            id: self.id,
+            type_: self.typ as u32,
+            name: self.name.clone(),
+            archived: self.archived,
+            param: self.param.to_string(),
+            gossiped_timestamp: self.get_gossiped_timestamp(context),
+            is_sending_locations: self.is_sending_locations,
+            color: self.get_color(context),
+            profile_image: self.get_profile_image(context).unwrap_or_else(PathBuf::new),
+            subtitle: self.get_subtitle(context),
+            draft,
+        })
+    }
+
     /// Returns true if the chat is archived.
     pub fn is_archived(&self) -> bool {
         self.archived
@@ -248,10 +299,12 @@ impl Chat {
         !self.is_unpromoted()
     }
 
+    /// Returns true if chat is a verified group chat.
     pub fn is_verified(&self) -> bool {
-        (self.typ == Chattype::VerifiedGroup)
+        self.typ == Chattype::VerifiedGroup
     }
 
+    /// Returns true if location streaming is enabled in the chat.
     pub fn is_sending_locations(&self) -> bool {
         self.is_sending_locations
     }
@@ -372,9 +425,7 @@ impl Chat {
                     }
                 }
 
-                if can_encrypt
-                    && (all_mutual || last_msg_in_chat_encrypted(context, &context.sql, self.id))
-                {
+                if can_encrypt && (all_mutual || self.parent_is_encrypted(context)) {
                     msg.param.set_int(Param::GuaranteeE2ee, 1);
                 }
             }
@@ -458,7 +509,7 @@ impl Chat {
                             DC_CONTACT_ID_SELF,
                             to_id as i32,
                             timestamp,
-                            msg.type_0,
+                            msg.viewtype,
                             msg.state,
                             msg.text.as_ref().map_or("", String::as_str),
                             msg.param.to_string(),
@@ -490,51 +541,108 @@ impl Chat {
     }
 }
 
-/// Create a normal chat or a group chat by a messages ID that comes typically
-/// from the deaddrop, DC_CHAT_ID_DEADDROP (1).
+/// The current state of a chat.
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+#[non_exhaustive]
+pub struct ChatInfo {
+    /// The chat ID.
+    pub id: u32,
+
+    /// The type of chat as a `u32` representation of [Chattype].
+    ///
+    /// On the C API this number is one of the
+    /// `DC_CHAT_TYPE_UNDEFINED`, `DC_CHAT_TYPE_SINGLE`,
+    /// `DC_CHAT_TYPE_GROUP` or `DC_CHAT_TYPE_VERIFIED_GROUP`
+    /// constants.
+    #[serde(rename = "type")]
+    pub type_: u32,
+
+    /// The name of the chat.
+    pub name: String,
+
+    /// Whether the chat is archived.
+    pub archived: bool,
+
+    /// The "params" of the chat.
+    ///
+    /// This is the string-serialised version of [Params] currently.
+    pub param: String,
+
+    /// Last time this client sent autocrypt gossip headers to this chat.
+    pub gossiped_timestamp: i64,
+
+    /// Whether this chat is currently sending location-stream messages.
+    pub is_sending_locations: bool,
+
+    /// Colour this chat should be represented in by the UI.
+    ///
+    /// Yes, spelling colour is hard.
+    pub color: u32,
+
+    /// The path to the profile image.
+    ///
+    /// If there is no profile image set this will be an empty string
+    /// currently.
+    pub profile_image: PathBuf,
+
+    /// Subtitle for the chat.
+    pub subtitle: String,
+
+    /// The draft message text.
+    ///
+    /// If the chat has not draft this is an empty string.
+    ///
+    /// TODO: This doesn't seem rich enough, it can not handle drafts
+    ///       which contain non-text parts.  Perhaps it should be a
+    ///       simple `has_draft` bool instead.
+    pub draft: String,
+    // ToDo:
+    // - [ ] deaddrop,
+    // - [ ] summary,
+    // - [ ] lastUpdated,
+    // - [ ] freshMessageCounter,
+    // - [ ] email
+}
+
+/// Create a chat from a message ID.
 ///
-/// If the given message ID already belongs to a normal chat or to a group chat,
-/// the chat ID of this chat is returned and no new chat is created.
-/// If a new chat is created, the given message ID is moved to this chat, however,
-/// there may be more messages moved to the chat from the deaddrop. To get the
-/// chat messages, use dc_get_chat_msgs().
+/// Typically you'd do this for a message ID found in the
+/// [DC_CHAT_ID_DEADDROP] which turns the chat the message belongs to
+/// into a normal chat.  The chat can be a 1:1 chat or a group chat
+/// and all messages belonging to the chat will be moved from the
+/// deaddrop to the normal chat.
 ///
-/// If the user is asked before creation, he should be
-/// asked whether he wants to chat with the *contact* belonging to the message;
-/// the group names may be really weird when taken from the subject of implicit
-/// groups and this may look confusing.
+/// In reality the messages already belong to this chat as receive_imf
+/// always creates chat IDs appropriately, so this function really
+/// only unblocks the chat and "scales up" the origin of the contact
+/// the message is from.
 ///
-/// Moreover, this function also scales up the origin of the contact belonging
-/// to the message and, depending on the contacts origin, messages from the
-/// same group may be shown or not - so, all in all, it is fine to show the
-/// contact name only.
+/// If prompting the user before calling this function, they should be
+/// asked whether they want to chat with the **contact** the message
+/// is from and **not** the group name since this can be really weird
+/// and confusing when taken from subject of implicit groups.
+///
+/// # Returns
+///
+/// The "created" chat ID is returned.
 pub fn create_by_msg_id(context: &Context, msg_id: MsgId) -> Result<u32, Error> {
-    let mut chat_id = 0;
-    let mut send_event = false;
+    let msg = Message::load_from_db(context, msg_id)?;
+    let chat = Chat::load_from_db(context, msg.chat_id)?;
+    ensure!(
+        chat.id > DC_CHAT_ID_LAST_SPECIAL,
+        "Message can not belong to a special chat"
+    );
+    if chat.blocked != Blocked::Not {
+        unblock(context, chat.id);
 
-    if let Ok(msg) = Message::load_from_db(context, msg_id) {
-        if let Ok(chat) = Chat::load_from_db(context, msg.chat_id) {
-            if chat.id > DC_CHAT_ID_LAST_SPECIAL {
-                chat_id = chat.id;
-                if chat.blocked != Blocked::Not {
-                    unblock(context, chat.id);
-                    send_event = true;
-                }
-                Contact::scaleup_origin_by_id(context, msg.from_id, Origin::CreateChat);
-            }
-        }
-    }
-
-    if send_event {
+        // Sending with 0s as data since multiple messages may have changed.
         context.call_cb(Event::MsgsChanged {
             chat_id: 0,
             msg_id: MsgId::new(0),
         });
     }
-
-    ensure!(chat_id > 0, "failed to load create chat");
-
-    Ok(chat_id)
+    Contact::scaleup_origin_by_id(context, msg.from_id, Origin::CreateChat);
+    Ok(chat.id)
 }
 
 /// Create a normal chat with a single user.  To create group chats,
@@ -627,6 +735,28 @@ pub fn update_device_icon(context: &Context) -> Result<(), Error> {
     Ok(())
 }
 
+fn update_special_chat_name(
+    context: &Context,
+    contact_id: u32,
+    stock_id: StockMessage,
+) -> Result<(), Error> {
+    if let Ok((chat_id, _)) = lookup_by_contact_id(context, contact_id) {
+        let name: String = context.stock_str(stock_id).into();
+        // the `!= name` condition avoids unneeded writes
+        context.sql.execute(
+            "UPDATE chats SET name=? WHERE id=? AND name!=?;",
+            params![name, chat_id, name],
+        )?;
+    }
+    Ok(())
+}
+
+pub fn update_special_chat_names(context: &Context) -> Result<(), Error> {
+    update_special_chat_name(context, DC_CONTACT_ID_DEVICE, StockMessage::DeviceMessages)?;
+    update_special_chat_name(context, DC_CONTACT_ID_SELF, StockMessage::SavedMessages)?;
+    Ok(())
+}
+
 pub fn create_or_lookup_by_contact_id(
     context: &Context,
     contact_id: u32,
@@ -646,8 +776,8 @@ pub fn create_or_lookup_by_contact_id(
     sql::execute(
         context,
         &context.sql,
-        format!(
-            "INSERT INTO chats (type, name, param, blocked, grpid, created_timestamp) VALUES({}, '{}', '{}', {}, '{}', {})",
+        "INSERT INTO chats (type, name, param, blocked, grpid, created_timestamp) VALUES(?, ?, ?, ?, ?, ?)",
+        params![
             100,
             chat_name,
             match contact_id {
@@ -658,8 +788,7 @@ pub fn create_or_lookup_by_contact_id(
             create_blocked as u8,
             contact.get_addr(),
             time(),
-        ),
-        params![],
+        ]
     )?;
 
     let chat_id = sql::get_rowid(context, &context.sql, "chats", "grpid", contact.get_addr());
@@ -667,11 +796,8 @@ pub fn create_or_lookup_by_contact_id(
     sql::execute(
         context,
         &context.sql,
-        format!(
-            "INSERT INTO chats_contacts (chat_id, contact_id) VALUES({}, {})",
-            chat_id, contact_id
-        ),
-        params![],
+        "INSERT INTO chats_contacts (chat_id, contact_id) VALUES(?, ?)",
+        params![chat_id, contact_id],
     )?;
 
     if contact_id == DC_CONTACT_ID_SELF {
@@ -735,16 +861,18 @@ pub fn msgtype_has_file(msgtype: Viewtype) -> bool {
 }
 
 fn prepare_msg_blob(context: &Context, msg: &mut Message) -> Result<(), Error> {
-    if msg.type_0 == Viewtype::Text {
+    if msg.viewtype == Viewtype::Text {
         // the caller should check if the message text is empty
-    } else if msgtype_has_file(msg.type_0) {
+    } else if msgtype_has_file(msg.viewtype) {
         let blob = msg
             .param
             .get_blob(Param::File, context, !msg.is_increation())?
-            .ok_or_else(|| format_err!("Attachment missing for message of type #{}", msg.type_0))?;
+            .ok_or_else(|| {
+                format_err!("Attachment missing for message of type #{}", msg.viewtype)
+            })?;
         msg.param.set(Param::File, blob.as_name());
 
-        if msg.type_0 == Viewtype::File || msg.type_0 == Viewtype::Image {
+        if msg.viewtype == Viewtype::File || msg.viewtype == Viewtype::Image {
             // Correct the type, take care not to correct already very special
             // formats as GIF or VOICE.
             //
@@ -754,7 +882,7 @@ fn prepare_msg_blob(context: &Context, msg: &mut Message) -> Result<(), Error> {
             if let Some((better_type, better_mime)) =
                 message::guess_msgtype_from_suffix(&blob.to_abs_path())
             {
-                msg.type_0 = better_type;
+                msg.viewtype = better_type;
                 msg.param.set(Param::MimeType, better_mime);
             }
         } else if !msg.param.exists(Param::MimeType) {
@@ -766,10 +894,10 @@ fn prepare_msg_blob(context: &Context, msg: &mut Message) -> Result<(), Error> {
             context,
             "Attaching \"{}\" for message type #{}.",
             blob.to_abs_path().display(),
-            msg.type_0
+            msg.viewtype
         );
     } else {
-        bail!("Cannot send messages of type #{}.", msg.type_0);
+        bail!("Cannot send messages of type #{}.", msg.viewtype);
     }
     Ok(())
 }
@@ -796,28 +924,7 @@ fn prepare_msg_common(context: &Context, chat_id: u32, msg: &mut Message) -> Res
     Ok(msg.id)
 }
 
-fn last_msg_in_chat_encrypted(context: &Context, sql: &Sql, chat_id: u32) -> bool {
-    let packed: Option<String> = sql.query_get_value(
-        context,
-        "SELECT param  \
-         FROM msgs  WHERE timestamp=(SELECT MAX(timestamp) FROM msgs WHERE chat_id=?)  \
-         ORDER BY id DESC;",
-        params![chat_id as i32],
-    );
-
-    if let Some(ref packed) = packed {
-        match packed.parse::<Params>() {
-            Ok(param) => param.exists(Param::GuaranteeE2ee),
-            Err(err) => {
-                error!(context, "invalid params stored: '{}', {:?}", packed, err);
-                false
-            }
-        }
-    } else {
-        false
-    }
-}
-
+/// Returns whether a contact is in a chat or not.
 pub fn is_contact_in_chat(context: &Context, chat_id: u32, contact_id: u32) -> bool {
     /* this function works for group and for normal chats, however, it is more useful for group chats.
     DC_CONTACT_ID_SELF may be used to check, if the user itself is in a group chat (DC_CONTACT_ID_SELF is not added to normal chats) */
@@ -951,7 +1058,7 @@ fn maybe_delete_draft(context: &Context, chat_id: u32) -> bool {
 ///
 /// Return true on success, false on database error.
 fn do_set_draft(context: &Context, chat_id: u32, msg: &mut Message) -> Result<(), Error> {
-    match msg.type_0 {
+    match msg.viewtype {
         Viewtype::Unknown => bail!("Can not set draft of unknown type."),
         Viewtype::Text => match msg.text.as_ref() {
             Some(text) => {
@@ -978,7 +1085,7 @@ fn do_set_draft(context: &Context, chat_id: u32, msg: &mut Message) -> Result<()
             chat_id as i32,
             DC_CONTACT_ID_SELF,
             time(),
-            msg.type_0,
+            msg.viewtype,
             MessageState::OutDraft,
             msg.text.as_ref().map(String::as_str).unwrap_or(""),
             msg.param.to_string(),
@@ -1108,6 +1215,7 @@ pub fn get_chat_msgs(
     }
 }
 
+/// Returns number of messages in a chat.
 pub fn get_msg_cnt(context: &Context, chat_id: u32) -> usize {
     context
         .sql
@@ -1252,7 +1360,7 @@ pub fn get_next_media(
             if msg_type != Viewtype::Unknown {
                 msg_type
             } else {
-                msg.type_0
+                msg.viewtype
             },
             msg_type2,
             msg_type3,
@@ -1278,6 +1386,7 @@ pub fn get_next_media(
     ret
 }
 
+/// Archives or unarchives a chat.
 pub fn archive(context: &Context, chat_id: u32, archive: bool) -> Result<(), Error> {
     ensure!(
         chat_id > DC_CHAT_ID_LAST_SPECIAL,
@@ -1313,6 +1422,7 @@ pub fn archive(context: &Context, chat_id: u32, archive: bool) -> Result<(), Err
     Ok(())
 }
 
+/// Deletes a chat.
 pub fn delete(context: &Context, chat_id: u32) -> Result<(), Error> {
     ensure!(
         chat_id > DC_CHAT_ID_LAST_SPECIAL,
@@ -1365,7 +1475,7 @@ pub fn get_chat_contacts(context: &Context, chat_id: u32) -> Vec<u32> {
     /* Normal chats do not include SELF.  Group chats do (as it may happen that one is deleted from a
     groupchat but the chats stays visible, moreover, this makes displaying lists easier) */
 
-    if chat_id == 1 {
+    if chat_id == DC_CHAT_ID_DEADDROP {
         return Vec::new();
     }
 
@@ -1443,6 +1553,7 @@ pub fn add_to_chat_contacts_table(context: &Context, chat_id: u32, contact_id: u
     .is_ok()
 }
 
+/// Adds a contact to the chat.
 pub fn add_contact_to_chat(context: &Context, chat_id: u32, contact_id: u32) -> bool {
     match add_contact_to_chat_ex(context, chat_id, contact_id, false) {
         Ok(res) => res,
@@ -1453,7 +1564,6 @@ pub fn add_contact_to_chat(context: &Context, chat_id: u32, contact_id: u32) ->
     }
 }
 
-#[allow(non_snake_case)]
 pub(crate) fn add_contact_to_chat_ex(
     context: &Context,
     chat_id: u32,
@@ -1527,7 +1637,7 @@ pub(crate) fn add_contact_to_chat_ex(
         }
     }
     if chat.param.get_int(Param::Unpromoted).unwrap_or_default() == 0 {
-        msg.type_0 = Viewtype::Text;
+        msg.viewtype = Viewtype::Text;
         msg.text = Some(context.stock_system_msg(
             StockMessage::MsgAddMember,
             contact.get_addr(),
@@ -1547,6 +1657,7 @@ pub(crate) fn add_contact_to_chat_ex(
         chat_id,
         msg_id: MsgId::new(0),
     });
+    context.call_cb(Event::ChatModified(chat_id));
     Ok(true)
 }
 
@@ -1565,7 +1676,7 @@ fn real_group_exists(context: &Context, chat_id: u32) -> bool {
         .unwrap_or_default()
 }
 
-pub fn reset_gossiped_timestamp(context: &Context, chat_id: u32) -> crate::sql::Result<()> {
+pub fn reset_gossiped_timestamp(context: &Context, chat_id: u32) -> Result<(), Error> {
     set_gossiped_timestamp(context, chat_id, 0)
 }
 
@@ -1586,31 +1697,23 @@ pub fn set_gossiped_timestamp(
     context: &Context,
     chat_id: u32,
     timestamp: i64,
-) -> crate::sql::Result<()> {
-    if 0 != chat_id {
-        info!(
-            context,
-            "set gossiped_timestamp for chat #{} to {}.", chat_id, timestamp,
-        );
+) -> Result<(), Error> {
+    ensure!(
+        chat_id > DC_CHAT_ID_LAST_SPECIAL,
+        "can not add member to special chats"
+    );
+    info!(
+        context,
+        "set gossiped_timestamp for chat #{} to {}.", chat_id, timestamp,
+    );
 
-        sql::execute(
-            context,
-            &context.sql,
-            "UPDATE chats SET gossiped_timestamp=? WHERE id=?;",
-            params![timestamp, chat_id as i32],
-        )
-    } else {
-        info!(
-            context,
-            "set gossiped_timestamp for all chats to {}.", timestamp,
-        );
-        sql::execute(
-            context,
-            &context.sql,
-            "UPDATE chats SET gossiped_timestamp=?;",
-            params![timestamp],
-        )
-    }
+    sql::execute(
+        context,
+        &context.sql,
+        "UPDATE chats SET gossiped_timestamp=? WHERE id=?;",
+        params![timestamp, chat_id as i32],
+    )?;
+    Ok(())
 }
 
 pub fn shall_attach_selfavatar(context: &Context, chat_id: u32) -> Result<bool, Error> {
@@ -1695,7 +1798,7 @@ pub fn remove_contact_from_chat(
                 /* we should respect this - whatever we send to the group, it gets discarded anyway! */
                 if let Ok(contact) = Contact::get_by_id(context, contact_id) {
                     if chat.is_promoted() {
-                        msg.type_0 = Viewtype::Text;
+                        msg.viewtype = Viewtype::Text;
                         if contact.id == DC_CONTACT_ID_SELF {
                             set_group_explicitly_left(context, chat.grpid)?;
                             msg.text = Some(context.stock_system_msg(
@@ -1799,7 +1902,7 @@ pub fn set_chat_name(
             .is_ok()
             {
                 if chat.is_promoted() {
-                    msg.type_0 = Viewtype::Text;
+                    msg.viewtype = Viewtype::Text;
                     msg.text = Some(context.stock_system_msg(
                         StockMessage::MsgGrpName,
                         &chat.name,
@@ -1834,7 +1937,6 @@ pub fn set_chat_name(
 /// The profile image can only be set when you are a member of the
 /// chat.  To remove the profile image pass an empty string for the
 /// `new_image` parameter.
-#[allow(non_snake_case)]
 pub fn set_chat_profile_image(
     context: &Context,
     chat_id: u32,
@@ -1875,6 +1977,7 @@ pub fn set_chat_profile_image(
                 _ => Err(err),
             },
         )?;
+        image_blob.recode_to_avatar_size(context)?;
         chat.param.set(Param::ProfileImage, image_blob.as_name());
         msg.param.set(Param::Arg, image_blob.as_name());
         msg.text = Some(context.stock_system_msg(
@@ -1915,8 +2018,11 @@ pub fn forward_msgs(context: &Context, msg_ids: &[MsgId], chat_id: u32) -> Resul
         ensure!(chat.can_send(), "cannot send to chat #{}", chat_id);
         curr_timestamp = dc_create_smeared_timestamps(context, msg_ids.len());
         let ids = context.sql.query_map(
-            "SELECT id FROM msgs WHERE id IN({}) ORDER BY timestamp,id",
-            params![msg_ids.iter().map(|_| "?").join(",")],
+            format!(
+                "SELECT id FROM msgs WHERE id IN({}) ORDER BY timestamp,id",
+                msg_ids.iter().map(|_| "?").join(",")
+            ),
+            msg_ids,
             |row| row.get::<_, MsgId>(0),
             |ids| ids.collect::<Result<Vec<_>, _>>().map_err(Into::into),
         )?;
@@ -1978,54 +2084,6 @@ pub fn forward_msgs(context: &Context, msg_ids: &[MsgId], chat_id: u32) -> Resul
     Ok(())
 }
 
-pub fn get_info_json(context: &Context, chat_id: u32) -> Result<String, Error> {
-    let chat = Chat::load_from_db(context, chat_id).unwrap();
-
-    // ToDo:
-    // - [x] id
-    // - [x] type
-    // - [x] name
-    // - [x] archived
-    // - [x] color
-    // - [x] profileImage
-    // - [x] subtitle
-    // - [x] draft,
-    // - [ ] deaddrop,
-    // - [ ] summary,
-    // - [ ] lastUpdated,
-    // - [ ] freshMessageCounter,
-    // - [ ] email
-
-    let profile_image = match chat.get_profile_image(context) {
-        Some(path) => path.into_os_string().into_string().unwrap(),
-        None => "".to_string(),
-    };
-
-    let draft = match get_draft(context, chat_id) {
-        Ok(message) => match message {
-            Some(m) => m.text.unwrap_or_else(|| "".to_string()),
-            None => "".to_string(),
-        },
-        Err(_) => "".to_string(),
-    };
-
-    let s = json!({
-         "id": chat.id,
-         "type": chat.typ as u32,
-         "name": chat.name,
-         "archived": chat.archived,
-         "param": chat.param.to_string(),
-         "gossiped_timestamp": chat.get_gossiped_timestamp(context),
-         "is_sending_locations": chat.is_sending_locations,
-         "color": chat.get_color(context),
-         "profile_image": profile_image,
-         "subtitle": chat.get_subtitle(context),
-         "draft": draft
-    });
-
-    Ok(s.to_string())
-}
-
 pub fn get_chat_contact_cnt(context: &Context, chat_id: u32) -> usize {
     context
         .sql
@@ -2053,23 +2111,26 @@ pub fn get_chat_cnt(context: &Context) -> usize {
     }
 }
 
-pub fn get_chat_id_by_grpid(context: &Context, grpid: impl AsRef<str>) -> (u32, bool, Blocked) {
-    context
-        .sql
-        .query_row(
-            "SELECT id, blocked, type FROM chats WHERE grpid=?;",
-            params![grpid.as_ref()],
-            |row| {
-                let chat_id = row.get(0)?;
+pub(crate) fn get_chat_id_by_grpid(
+    context: &Context,
+    grpid: impl AsRef<str>,
+) -> Result<(u32, bool, Blocked), sql::Error> {
+    context.sql.query_row(
+        "SELECT id, blocked, type FROM chats WHERE grpid=?;",
+        params![grpid.as_ref()],
+        |row| {
+            let chat_id = row.get(0)?;
 
-                let b = row.get::<_, Option<Blocked>>(1)?.unwrap_or_default();
-                let v = row.get::<_, Option<Chattype>>(2)?.unwrap_or_default();
-                Ok((chat_id, v == Chattype::VerifiedGroup, b))
-            },
-        )
-        .unwrap_or((0, false, Blocked::Not))
+            let b = row.get::<_, Option<Blocked>>(1)?.unwrap_or_default();
+            let v = row.get::<_, Option<Chattype>>(2)?.unwrap_or_default();
+            Ok((chat_id, v == Chattype::VerifiedGroup, b))
+        },
+    )
 }
 
+/// Adds a message to device chat.
+///
+/// Optional `label` can be provided to ensure that message is added only once.
 pub fn add_device_msg(
     context: &Context,
     label: Option<&str>,
@@ -2105,7 +2166,7 @@ pub fn add_device_msg(
                 DC_CONTACT_ID_DEVICE,
                 DC_CONTACT_ID_SELF,
                 dc_create_smeared_timestamp(context),
-                msg.type_0,
+                msg.viewtype,
                 MessageState::InFresh,
                 msg.text.as_ref().map_or("", String::as_str),
                 msg.param.to_string(),
@@ -2144,6 +2205,25 @@ pub fn was_device_msg_ever_added(context: &Context, label: &str) -> Result<bool,
     Ok(false)
 }
 
+// needed on device-switches during export/import;
+// - deletion in `msgs` with `DC_CONTACT_ID_DEVICE` makes sure,
+//   no wrong information are shown in the device chat
+// - deletion in `devmsglabels` makes sure,
+//   deleted messages are resetted and useful messages can be added again
+pub fn delete_and_reset_all_device_msgs(context: &Context) -> Result<(), Error> {
+    context.sql.execute(
+        "DELETE FROM msgs WHERE from_id=?;",
+        params![DC_CONTACT_ID_DEVICE],
+    )?;
+    context
+        .sql
+        .execute("DELETE FROM devmsglabels;", params![])?;
+    Ok(())
+}
+
+/// Adds an informational message to chat.
+///
+/// For example, it can be a message showing that a member was added to a group.
 pub fn add_info_msg(context: &Context, chat_id: u32, text: impl AsRef<str>) {
     let rfc724_mid = dc_create_outgoing_rfc724_mid(None, "@device");
 
@@ -2174,8 +2254,41 @@ pub fn add_info_msg(context: &Context, chat_id: u32, text: impl AsRef<str>) {
 mod tests {
     use super::*;
 
+    use crate::contact::Contact;
     use crate::test_utils::*;
 
+    #[test]
+    fn test_chat_info() {
+        let t = dummy_context();
+        let bob = Contact::create(&t.ctx, "bob", "bob@example.com").unwrap();
+        let chat_id = create_by_contact_id(&t.ctx, bob).unwrap();
+        let chat = Chat::load_from_db(&t.ctx, chat_id).unwrap();
+        let info = chat.get_info(&t.ctx).unwrap();
+
+        // Ensure we can serialise this.
+        println!("{}", serde_json::to_string_pretty(&info).unwrap());
+
+        let expected = r#"
+            {
+                "id": 10,
+                "type": 100,
+                "name": "bob",
+                "archived": false,
+                "param": "",
+                "gossiped_timestamp": 0,
+                "is_sending_locations": false,
+                "color": 15895624,
+                "profile_image": "",
+                "subtitle": "bob@example.com",
+                "draft": ""
+            }
+        "#;
+
+        // Ensure we can deserialise this.
+        let loaded: ChatInfo = serde_json::from_str(expected).unwrap();
+        assert_eq!(info, loaded);
+    }
+
     #[test]
     fn test_get_draft_no_draft() {
         let t = dummy_context();
@@ -2405,6 +2518,25 @@ mod tests {
         assert!(forward_msgs(&t.ctx, &[msg_id], device_chat_id).is_err());
     }
 
+    #[test]
+    fn test_delete_and_reset_all_device_msgs() {
+        let t = test_context(Some(Box::new(logging_cb)));
+        let mut msg = Message::new(Viewtype::Text);
+        msg.text = Some("message text".to_string());
+        let msg_id1 = add_device_msg(&t.ctx, Some("some-label"), Some(&mut msg)).unwrap();
+
+        // adding a device message with the same label won't be executed again ...
+        assert!(was_device_msg_ever_added(&t.ctx, "some-label").unwrap());
+        let msg_id2 = add_device_msg(&t.ctx, Some("some-label"), Some(&mut msg)).unwrap();
+        assert!(msg_id2.is_unset());
+
+        // ... unless everything is deleted and resetted - as needed eg. on device switch
+        delete_and_reset_all_device_msgs(&t.ctx).unwrap();
+        assert!(!was_device_msg_ever_added(&t.ctx, "some-label").unwrap());
+        let msg_id3 = add_device_msg(&t.ctx, Some("some-label"), Some(&mut msg)).unwrap();
+        assert_ne!(msg_id1, msg_id3);
+    }
+
     fn chatlist_len(ctx: &Context, listflags: usize) -> usize {
         Chatlist::try_load(ctx, listflags, None, None)
             .unwrap()

src/chatlist.rs

@@ -162,6 +162,12 @@ impl Chatlist {
             let query = query.trim().to_string();
             ensure!(!query.is_empty(), "missing query");
 
+            // allow searching over special names that may change at any time
+            // when the ui calls set_stock_translation()
+            if let Err(err) = update_special_chat_names(context) {
+                warn!(context, "cannot update special chat names: {:?}", err)
+            }
+
             let str_like_cmd = format!("%{}%", query);
             context.sql.query_map(
                 "SELECT c.id, m.id
@@ -314,7 +320,7 @@ impl Chatlist {
     }
 }
 
-/// Get the number of archived chats
+/// Returns the number of archived chats
 pub fn dc_get_archived_cnt(context: &Context) -> u32 {
     context
         .sql
@@ -384,4 +390,27 @@ mod tests {
         let chats = Chatlist::try_load(&t.ctx, DC_GCL_ARCHIVED_ONLY, None, None).unwrap();
         assert_eq!(chats.len(), 1);
     }
+
+    #[test]
+    fn test_search_special_chat_names() {
+        let t = dummy_context();
+        t.ctx.update_device_chats().unwrap();
+
+        let chats = Chatlist::try_load(&t.ctx, 0, Some("t-1234-s"), None).unwrap();
+        assert_eq!(chats.len(), 0);
+        let chats = Chatlist::try_load(&t.ctx, 0, Some("t-5678-b"), None).unwrap();
+        assert_eq!(chats.len(), 0);
+
+        t.ctx
+            .set_stock_translation(StockMessage::SavedMessages, "test-1234-save".to_string())
+            .unwrap();
+        let chats = Chatlist::try_load(&t.ctx, 0, Some("t-1234-s"), None).unwrap();
+        assert_eq!(chats.len(), 1);
+
+        t.ctx
+            .set_stock_translation(StockMessage::DeviceMessages, "test-5678-babbel".to_string())
+            .unwrap();
+        let chats = Chatlist::try_load(&t.ctx, 0, Some("t-5678-b"), None).unwrap();
+        assert_eq!(chats.len(), 1);
+    }
 }

src/config.rs

@@ -136,6 +136,7 @@ impl Context {
                 match value {
                     Some(value) => {
                         let blob = BlobObject::new_from_path(&self, value)?;
+                        blob.recode_to_avatar_size(self)?;
                         self.sql.set_raw_config(self, key, Some(blob.as_name()))
                     }
                     None => self.sql.set_raw_config(self, key, None),
@@ -143,7 +144,7 @@ impl Context {
             }
             Config::InboxWatch => {
                 let ret = self.sql.set_raw_config(self, key, value);
-                interrupt_inbox_idle(self, true);
+                interrupt_inbox_idle(self);
                 ret
             }
             Config::SentboxWatch => {
@@ -189,7 +190,11 @@ mod tests {
     use std::str::FromStr;
     use std::string::ToString;
 
+    use crate::constants::AVATAR_SIZE;
     use crate::test_utils::*;
+    use image::GenericImageView;
+    use std::fs::File;
+    use std::io::Write;
 
     #[test]
     fn test_to_string() {
@@ -209,30 +214,55 @@ mod tests {
     }
 
     #[test]
-    fn test_selfavatar() -> failure::Fallible<()> {
+    fn test_selfavatar_outside_blobdir() {
         let t = dummy_context();
         let avatar_src = t.dir.path().join("avatar.jpg");
-        std::fs::write(&avatar_src, b"avatar")?;
+        let avatar_bytes = include_bytes!("../test-data/image/avatar1000x1000.jpg");
+        File::create(&avatar_src)
+            .unwrap()
+            .write_all(avatar_bytes)
+            .unwrap();
         let avatar_blob = t.ctx.get_blobdir().join("avatar.jpg");
         assert!(!avatar_blob.exists());
         t.ctx
-            .set_config(Config::Selfavatar, Some(&avatar_src.to_str().unwrap()))?;
+            .set_config(Config::Selfavatar, Some(&avatar_src.to_str().unwrap()))
+            .unwrap();
         assert!(avatar_blob.exists());
-        assert_eq!(std::fs::read(&avatar_blob)?, b"avatar");
+        assert!(std::fs::metadata(&avatar_blob).unwrap().len() < avatar_bytes.len() as u64);
         let avatar_cfg = t.ctx.get_config(Config::Selfavatar);
         assert_eq!(avatar_cfg, avatar_blob.to_str().map(|s| s.to_string()));
-        Ok(())
+
+        let img = image::open(avatar_src).unwrap();
+        assert_eq!(img.width(), 1000);
+        assert_eq!(img.height(), 1000);
+
+        let img = image::open(avatar_blob).unwrap();
+        assert_eq!(img.width(), AVATAR_SIZE);
+        assert_eq!(img.height(), AVATAR_SIZE);
     }
 
     #[test]
-    fn test_selfavatar_in_blobdir() -> failure::Fallible<()> {
+    fn test_selfavatar_in_blobdir() {
         let t = dummy_context();
-        let avatar_src = t.ctx.get_blobdir().join("avatar.jpg");
-        std::fs::write(&avatar_src, b"avatar")?;
+        let avatar_src = t.ctx.get_blobdir().join("avatar.png");
+        let avatar_bytes = include_bytes!("../test-data/image/avatar900x900.png");
+        File::create(&avatar_src)
+            .unwrap()
+            .write_all(avatar_bytes)
+            .unwrap();
+
+        let img = image::open(&avatar_src).unwrap();
+        assert_eq!(img.width(), 900);
+        assert_eq!(img.height(), 900);
+
         t.ctx
-            .set_config(Config::Selfavatar, Some(&avatar_src.to_str().unwrap()))?;
+            .set_config(Config::Selfavatar, Some(&avatar_src.to_str().unwrap()))
+            .unwrap();
         let avatar_cfg = t.ctx.get_config(Config::Selfavatar);
         assert_eq!(avatar_cfg, avatar_src.to_str().map(|s| s.to_string()));
-        Ok(())
+
+        let img = image::open(avatar_src).unwrap();
+        assert_eq!(img.width(), AVATAR_SIZE);
+        assert_eq!(img.height(), AVATAR_SIZE);
     }
 }

src/configure/mod.rs

@@ -6,12 +6,14 @@ mod read_url;
 
 use percent_encoding::{utf8_percent_encode, NON_ALPHANUMERIC};
 
+use async_std::task;
+
 use crate::config::Config;
 use crate::constants::*;
 use crate::context::Context;
 use crate::dc_tools::*;
 use crate::e2ee;
-use crate::job::*;
+use crate::job::{self, job_add, job_kill_action};
 use crate::login_param::{CertificateChecks, LoginParam};
 use crate::oauth2::*;
 use crate::param::Params;
@@ -35,8 +37,8 @@ pub fn configure(context: &Context) {
         warn!(context, "There is already another ongoing process running.",);
         return;
     }
-    job_kill_action(context, Action::ConfigureImap);
-    job_add(context, Action::ConfigureImap, 0, Params::new(), 0);
+    job_kill_action(context, job::Action::ConfigureImap);
+    job_add(context, job::Action::ConfigureImap, 0, Params::new(), 0);
 }
 
 /// Check if the context is already configured.
@@ -48,15 +50,15 @@ pub fn dc_is_configured(context: &Context) -> bool {
  * Configure JOB
  ******************************************************************************/
 #[allow(non_snake_case, unused_must_use)]
-pub fn JobConfigureImap(context: &Context) {
+pub fn JobConfigureImap(context: &Context) -> job::Status {
     if !context.sql.is_open() {
         error!(context, "Cannot configure, database not opened.",);
         progress!(context, 0);
-        return;
+        return job::Status::Finished(Err(format_err!("Database not opened")));
     }
     if !context.alloc_ongoing() {
         progress!(context, 0);
-        return;
+        return job::Status::Finished(Err(format_err!("Cannot allocated ongoing process")));
     }
     let mut success = false;
     let mut imap_connected_here = false;
@@ -439,6 +441,7 @@ pub fn JobConfigureImap(context: &Context) {
 
     context.free_ongoing();
     progress!(context, if success { 1000 } else { 0 });
+    job::Status::Finished(Ok(()))
 }
 
 fn get_offline_autoconfig(context: &Context, param: &LoginParam) -> Option<LoginParam> {
@@ -540,13 +543,14 @@ fn try_imap_one_param(context: &Context, param: &LoginParam) -> Option<bool> {
         param.imap_certificate_checks
     );
     info!(context, "Trying: {}", inf);
-    if context
-        .inbox_thread
-        .read()
-        .unwrap()
-        .imap
-        .connect(context, &param)
-    {
+    if task::block_on(
+        context
+            .inbox_thread
+            .read()
+            .unwrap()
+            .imap
+            .connect(context, &param),
+    ) {
         info!(context, "success: {}", inf);
         return Some(true);
     }

src/configure/read_url.rs

@@ -11,10 +11,10 @@ pub type Result<T> = std::result::Result<T, Error>;
 pub fn read_url(context: &Context, url: &str) -> Result<String> {
     info!(context, "Requesting URL {}", url);
 
-    match reqwest::Client::new()
+    match reqwest::blocking::Client::new()
         .get(url)
         .send()
-        .and_then(|mut res| res.text())
+        .and_then(|res| res.text())
     {
         Ok(res) => Ok(res),
         Err(err) => {

src/constants.rs

@@ -1,5 +1,5 @@
 //! # Constants
-#![allow(non_camel_case_types, dead_code)]
+#![allow(dead_code)]
 
 use deltachat_derive::*;
 use lazy_static::lazy_static;
@@ -61,10 +61,6 @@ pub const DC_GCL_ADD_SELF: usize = 0x02;
 // unchanged user avatars are resent to the recipients every some days
 pub const DC_RESEND_USER_AVATAR_DAYS: i64 = 14;
 
-// values for DC_PARAM_FORCE_PLAINTEXT
-pub(crate) const DC_FP_NO_AUTOCRYPT_HEADER: i32 = 2;
-pub(crate) const DC_FP_ADD_AUTOCRYPT_HEADER: i32 = 1;
-
 /// virtual chat showing all messages belonging to chats flagged with chats.blocked=2
 pub(crate) const DC_CHAT_ID_DEADDROP: u32 = 1;
 /// messages that should be deleted get this chat_id; the messages are deleted from the working thread later then. This is also needed as rfc724_mid should be preset as long as the message is not deleted on the server (otherwise it is downloaded again)
@@ -114,7 +110,7 @@ pub const DC_MSG_ID_LAST_SPECIAL: u32 = 9;
 /// approx. max. length returned by dc_msg_get_text()
 const DC_MAX_GET_TEXT_LEN: usize = 30000;
 /// approx. max. length returned by dc_get_msg_info()
-const DC_MAX_GET_INFO_LEN: usize = 100000;
+const DC_MAX_GET_INFO_LEN: usize = 100_000;
 
 pub const DC_CONTACT_ID_UNDEFINED: u32 = 0;
 pub const DC_CONTACT_ID_SELF: u32 = 1;
@@ -184,10 +180,14 @@ pub const DC_VC_CONTACT_CONFIRM: i32 = 6;
 pub const DC_BOB_ERROR: i32 = 0;
 pub const DC_BOB_SUCCESS: i32 = 1;
 
+// max. width/height of an avatar
+pub const AVATAR_SIZE: u32 = 192;
+
 #[derive(Debug, Display, Clone, Copy, PartialEq, Eq, FromPrimitive, ToPrimitive, FromSql, ToSql)]
 #[repr(i32)]
 pub enum Viewtype {
     Unknown = 0,
+
     /// Text message.
     /// The text of the message is set using dc_msg_set_text()
     /// and retrieved with dc_msg_get_text().

src/contact.rs

@@ -1,3 +1,5 @@
+//! Contacts module
+
 use std::path::PathBuf;
 
 use deltachat_derive::*;
@@ -46,20 +48,26 @@ pub struct Contact {
     ///
     /// Normal contact IDs are larger than these special ones (larger than DC_CONTACT_ID_LAST_SPECIAL).
     pub id: u32,
+
     /// Contact name. It is recommended to use `Contact::get_name`,
     /// `Contact::get_display_name` or `Contact::get_name_n_addr` to access this field.
     /// May be empty, initially set to `authname`.
     name: String,
+
     /// Name authorized by the contact himself. Only this name may be spread to others,
     /// e.g. in To:-lists. May be empty. It is recommended to use `Contact::get_authname`,
     /// to access this field.
     authname: String,
+
     /// E-Mail-Address of the contact. It is recommended to use `Contact::get_addr`` to access this field.
     addr: String,
+
     /// Blocked state. Use dc_contact_is_blocked to access this field.
-    blocked: bool,
+    pub blocked: bool,
+
     /// The origin/source of the contact.
     pub origin: Origin,
+
     /// Parameters as Param::ProfileImage
     pub param: Params,
 }
@@ -71,38 +79,54 @@ pub struct Contact {
 #[repr(i32)]
 pub enum Origin {
     Unknown = 0,
+
     /// From: of incoming messages of unknown sender
     IncomingUnknownFrom = 0x10,
+
     /// Cc: of incoming messages of unknown sender
     IncomingUnknownCc = 0x20,
+
     /// To: of incoming messages of unknown sender
     IncomingUnknownTo = 0x40,
+
     /// address scanned but not verified
     UnhandledQrScan = 0x80,
+
     /// Reply-To: of incoming message of known sender
     IncomingReplyTo = 0x100,
+
     /// Cc: of incoming message of known sender
     IncomingCc = 0x200,
+
     /// additional To:'s of incoming message of known sender
     IncomingTo = 0x400,
+
     /// a chat was manually created for this user, but no message yet sent
     CreateChat = 0x800,
+
     /// message sent by us
     OutgoingBcc = 0x1000,
+
     /// message sent by us
     OutgoingCc = 0x2000,
+
     /// message sent by us
     OutgoingTo = 0x4000,
+
     /// internal use
     Internal = 0x40000,
+
     /// address is in our address book
     AdressBook = 0x80000,
+
     /// set on Alice's side for contacts like Bob that have scanned the QR code offered by her. Only means the contact has once been established using the "securejoin" procedure in the past, getting the current key verification status requires calling dc_contact_is_verified() !
-    SecurejoinInvited = 0x1000000,
+    SecurejoinInvited = 0x0100_0000,
+
     /// set on Bob's side for contacts scanned and verified from a QR code. Only means the contact has once been established using the "securejoin" procedure in the past, getting the current key verification status requires calling dc_contact_is_verified() !
-    SecurejoinJoined = 0x2000000,
-    /// contact added mannually by dc_create_contact(), this should be the largets origin as otherwise the user cannot modify the names
-    ManuallyCreated = 0x4000000,
+    SecurejoinJoined = 0x0200_0000,
+
+    /// contact added mannually by dc_create_contact(), this should be the largest origin as otherwise the user cannot modify the names
+    ManuallyCreated = 0x0400_0000,
 }
 
 impl Default for Origin {
@@ -112,14 +136,11 @@ impl Default for Origin {
 }
 
 impl Origin {
-    /// Contacts that are verified and known not to be spam.
-    pub fn is_verified(self) -> bool {
-        self as i32 >= 0x100
-    }
-
-    /// Contacts that are shown in the contact list.
-    pub fn include_in_contactlist(self) -> bool {
-        self as i32 >= DC_ORIGIN_MIN_CONTACT_LIST
+    /// Contacts that are known, i. e. they came in via accepted contacts or
+    /// themselves an accepted contact. Known contacts are shown in the
+    /// contact list when one creates a chat and wants to add members etc.
+    pub fn is_known(self) -> bool {
+        self >= Origin::IncomingReplyTo
     }
 }
 
@@ -389,18 +410,30 @@ impl Contact {
                 }
                 sth_modified = Modifier::Modified;
             }
-        } else if sql::execute(
-            context,
-            &context.sql,
-            "INSERT INTO contacts (name, addr, origin) VALUES(?, ?, ?);",
-            params![name.as_ref(), addr, origin,],
-        )
-        .is_ok()
-        {
-            row_id = sql::get_rowid(context, &context.sql, "contacts", "addr", addr);
-            sth_modified = Modifier::Created;
         } else {
-            error!(context, "Cannot add contact.");
+            if origin == Origin::IncomingUnknownFrom {
+                update_authname = true;
+            }
+
+            if sql::execute(
+                context,
+                &context.sql,
+                "INSERT INTO contacts (name, addr, origin, authname) VALUES(?, ?, ?, ?);",
+                params![
+                    name.as_ref(),
+                    addr,
+                    origin,
+                    if update_authname { name.as_ref() } else { "" }
+                ],
+            )
+            .is_ok()
+            {
+                row_id = sql::get_rowid(context, &context.sql, "contacts", "addr", addr);
+                sth_modified = Modifier::Created;
+                info!(context, "added contact id={} addr={}", row_id, addr);
+            } else {
+                error!(context, "Cannot add contact.");
+            }
         }
 
         Ok((row_id, sth_modified))
@@ -484,7 +517,7 @@ impl Contact {
                 params![
                     self_addr,
                     DC_CONTACT_ID_LAST_SPECIAL as i32,
-                    0x100,
+                    Origin::IncomingReplyTo,
                     &s3str_like_cmd,
                     &s3str_like_cmd,
                     if flag_verified_only { 0 } else { 1 },
@@ -870,22 +903,6 @@ impl Contact {
             .unwrap_or_default() as usize
     }
 
-    pub fn get_origin_by_id(context: &Context, contact_id: u32, ret_blocked: &mut bool) -> Origin {
-        let mut ret = Origin::Unknown;
-        *ret_blocked = false;
-
-        if let Ok(contact) = Contact::load_from_db(context, contact_id) {
-            /* we could optimize this by loading only the needed fields */
-            if contact.blocked {
-                *ret_blocked = true;
-            } else {
-                ret = contact.origin;
-            }
-        }
-
-        ret
-    }
-
     pub fn real_exists_by_id(context: &Context, contact_id: u32) -> bool {
         if !context.sql.is_open() || contact_id <= DC_CONTACT_ID_LAST_SPECIAL {
             return false;
@@ -969,7 +986,7 @@ fn set_block_contact(context: &Context, contact_id: u32, new_blocking: bool) {
 pub fn set_profile_image(
     context: &Context,
     contact_id: u32,
-    profile_image: AvatarAction,
+    profile_image: &AvatarAction,
 ) -> Result<()> {
     // the given profile image is expected to be already in the blob directory
     // as profile images can be set only by receiving messages, this should be always the case, however.
@@ -1259,6 +1276,63 @@ mod tests {
         assert!(!contact.is_blocked());
     }
 
+    #[test]
+    fn test_remote_authnames() {
+        let t = dummy_context();
+
+        let (contact_id, sth_modified) = Contact::add_or_lookup(
+            &t.ctx,
+            "bob1",
+            "bob@example.org",
+            Origin::IncomingUnknownFrom,
+        )
+        .unwrap();
+        assert!(contact_id > DC_CONTACT_ID_LAST_SPECIAL);
+        assert_eq!(sth_modified, Modifier::Created);
+        let contact = Contact::load_from_db(&t.ctx, contact_id).unwrap();
+        assert_eq!(contact.get_authname(), "bob1");
+        assert_eq!(contact.get_name(), "bob1");
+        assert_eq!(contact.get_display_name(), "bob1");
+
+        let (contact_id, sth_modified) = Contact::add_or_lookup(
+            &t.ctx,
+            "bob2",
+            "bob@example.org",
+            Origin::IncomingUnknownFrom,
+        )
+        .unwrap();
+        assert!(contact_id > DC_CONTACT_ID_LAST_SPECIAL);
+        assert_eq!(sth_modified, Modifier::Modified);
+        let contact = Contact::load_from_db(&t.ctx, contact_id).unwrap();
+        assert_eq!(contact.get_authname(), "bob2");
+        assert_eq!(contact.get_name(), "bob2");
+        assert_eq!(contact.get_display_name(), "bob2");
+
+        let (contact_id, sth_modified) =
+            Contact::add_or_lookup(&t.ctx, "bob3", "bob@example.org", Origin::ManuallyCreated)
+                .unwrap();
+        assert!(contact_id > DC_CONTACT_ID_LAST_SPECIAL);
+        assert_eq!(sth_modified, Modifier::Modified);
+        let contact = Contact::load_from_db(&t.ctx, contact_id).unwrap();
+        assert_eq!(contact.get_authname(), "bob2");
+        assert_eq!(contact.get_name(), "bob3");
+        assert_eq!(contact.get_display_name(), "bob3");
+
+        let (contact_id, sth_modified) = Contact::add_or_lookup(
+            &t.ctx,
+            "bob4",
+            "bob@example.org",
+            Origin::IncomingUnknownFrom,
+        )
+        .unwrap();
+        assert!(contact_id > DC_CONTACT_ID_LAST_SPECIAL);
+        assert_eq!(sth_modified, Modifier::Modified);
+        let contact = Contact::load_from_db(&t.ctx, contact_id).unwrap();
+        assert_eq!(contact.get_authname(), "bob4");
+        assert_eq!(contact.get_name(), "bob3");
+        assert_eq!(contact.get_display_name(), "bob3");
+    }
+
     #[test]
     fn test_addr_cmp() {
         assert!(addr_cmp("AA@AA.ORG", "aa@aa.ORG"));

src/context.rs

@@ -1,12 +1,10 @@
-//! Contacts module
+//! Context module
 
 use std::collections::HashMap;
 use std::ffi::OsString;
 use std::path::{Path, PathBuf};
 use std::sync::{Arc, Condvar, Mutex, RwLock};
 
-use libc::uintptr_t;
-
 use crate::chat::*;
 use crate::config::Config;
 use crate::constants::*;
@@ -19,7 +17,7 @@ use crate::job_thread::JobThread;
 use crate::key::*;
 use crate::login_param::LoginParam;
 use crate::lot::Lot;
-use crate::message::{self, Message, MsgId};
+use crate::message::{self, Message, MessengerMessage, MsgId};
 use crate::param::Params;
 use crate::smtp::Smtp;
 use crate::sql::Sql;
@@ -32,12 +30,7 @@ use crate::sql::Sql;
 /// * `event` - One of the [Event] items.
 /// * `data1` - Depends on the event parameter, see [Event].
 /// * `data2` - Depends on the event parameter, see [Event].
-///
-/// # Returns
-///
-/// This callback must return 0 unless stated otherwise in the event
-/// description at [Event].
-pub type ContextCallback = dyn Fn(&Context, Event) -> uintptr_t + Send + Sync;
+pub type ContextCallback = dyn Fn(&Context, Event) -> () + Send + Sync;
 
 #[derive(DebugStub)]
 pub struct Context {
@@ -82,16 +75,7 @@ pub fn get_info() -> HashMap<&'static str, String> {
     let mut res = HashMap::new();
     res.insert("deltachat_core_version", format!("v{}", &*DC_VERSION_STR));
     res.insert("sqlite_version", rusqlite::version().to_string());
-    res.insert(
-        "sqlite_thread_safe",
-        unsafe { rusqlite::ffi::sqlite3_threadsafe() }.to_string(),
-    );
-    res.insert(
-        "arch",
-        (std::mem::size_of::<*mut libc::c_void>())
-            .wrapping_mul(8)
-            .to_string(),
-    );
+    res.insert("arch", (std::mem::size_of::<usize>() * 8).to_string());
     res.insert("level", "awesome".into());
     res
 }
@@ -172,8 +156,8 @@ impl Context {
         self.blobdir.as_path()
     }
 
-    pub fn call_cb(&self, event: Event) -> uintptr_t {
-        (*self.cb)(self, event)
+    pub fn call_cb(&self, event: Event) {
+        (*self.cb)(self, event);
     }
 
     /*******************************************************************************
@@ -452,15 +436,17 @@ impl Context {
                 return;
             }
 
-            // 1 = dc message, 2 = reply to dc message
-            if 0 != msg.is_dc_message {
-                job_add(
-                    self,
-                    Action::MoveMsg,
-                    msg.id.to_u32() as i32,
-                    Params::new(),
-                    0,
-                );
+            match msg.is_dc_message {
+                MessengerMessage::No => {}
+                MessengerMessage::Yes | MessengerMessage::Reply => {
+                    job_add(
+                        self,
+                        Action::MoveMsg,
+                        msg.id.to_u32() as i32,
+                        Params::new(),
+                        0,
+                    );
+                }
             }
         }
     }
@@ -533,7 +519,7 @@ mod tests {
         let tmp = tempfile::tempdir().unwrap();
         let dbfile = tmp.path().join("db.sqlite");
         std::fs::write(&dbfile, b"123").unwrap();
-        let res = Context::new(Box::new(|_, _| 0), "FakeOs".into(), dbfile);
+        let res = Context::new(Box::new(|_, _| ()), "FakeOs".into(), dbfile);
         assert!(res.is_err());
     }
 
@@ -548,7 +534,7 @@ mod tests {
     fn test_blobdir_exists() {
         let tmp = tempfile::tempdir().unwrap();
         let dbfile = tmp.path().join("db.sqlite");
-        Context::new(Box::new(|_, _| 0), "FakeOS".into(), dbfile).unwrap();
+        Context::new(Box::new(|_, _| ()), "FakeOS".into(), dbfile).unwrap();
         let blobdir = tmp.path().join("db.sqlite-blobs");
         assert!(blobdir.is_dir());
     }
@@ -559,7 +545,7 @@ mod tests {
         let dbfile = tmp.path().join("db.sqlite");
         let blobdir = tmp.path().join("db.sqlite-blobs");
         std::fs::write(&blobdir, b"123").unwrap();
-        let res = Context::new(Box::new(|_, _| 0), "FakeOS".into(), dbfile);
+        let res = Context::new(Box::new(|_, _| ()), "FakeOS".into(), dbfile);
         assert!(res.is_err());
     }
 
@@ -569,7 +555,7 @@ mod tests {
         let subdir = tmp.path().join("subdir");
         let dbfile = subdir.join("db.sqlite");
         let dbfile2 = dbfile.clone();
-        Context::new(Box::new(|_, _| 0), "FakeOS".into(), dbfile).unwrap();
+        Context::new(Box::new(|_, _| ()), "FakeOS".into(), dbfile).unwrap();
         assert!(subdir.is_dir());
         assert!(dbfile2.is_file());
     }
@@ -579,7 +565,7 @@ mod tests {
         let tmp = tempfile::tempdir().unwrap();
         let dbfile = tmp.path().join("db.sqlite");
         let blobdir = PathBuf::new();
-        let res = Context::with_blobdir(Box::new(|_, _| 0), "FakeOS".into(), dbfile, blobdir);
+        let res = Context::with_blobdir(Box::new(|_, _| ()), "FakeOS".into(), dbfile, blobdir);
         assert!(res.is_err());
     }
 
@@ -588,7 +574,7 @@ mod tests {
         let tmp = tempfile::tempdir().unwrap();
         let dbfile = tmp.path().join("db.sqlite");
         let blobdir = tmp.path().join("blobs");
-        let res = Context::with_blobdir(Box::new(|_, _| 0), "FakeOS".into(), dbfile, blobdir);
+        let res = Context::with_blobdir(Box::new(|_, _| ()), "FakeOS".into(), dbfile, blobdir);
         assert!(res.is_err());
     }
 

src/dc_receive_imf.rs

@@ -13,11 +13,11 @@ use crate::error::Result;
 use crate::events::Event;
 use crate::headerdef::HeaderDef;
 use crate::job::*;
-use crate::message::{self, MessageState, MsgId};
+use crate::message::{self, MessageState, MessengerMessage, MsgId};
 use crate::mimeparser::*;
 use crate::param::*;
 use crate::peerstate::*;
-use crate::securejoin::handle_securejoin_handshake;
+use crate::securejoin::{self, handle_securejoin_handshake};
 use crate::sql;
 use crate::stock::StockMessage;
 use crate::{contact, location};
@@ -55,15 +55,12 @@ pub fn dc_receive_imf(
         println!("{}", String::from_utf8_lossy(imf_raw));
     }
 
-    let mut mime_parser = MimeParser::from_bytes(context, imf_raw)?;
+    let mut mime_parser = MimeMessage::from_bytes(context, imf_raw)?;
 
     // we can not add even an empty record if we have no info whatsoever
     ensure!(mime_parser.has_headers(), "No Headers Found");
 
     // the function returns the number of created messages in the database
-    let mut incoming = true;
-    let mut incoming_origin = Origin::Unknown;
-    let mut to_id = 0u32;
     let mut chat_id = 0;
     let mut hidden = false;
 
@@ -73,15 +70,11 @@ pub fn dc_receive_imf(
     let mut sent_timestamp = 0;
     let mut created_db_entries = Vec::new();
     let mut create_event_to_send = Some(CreateEvent::MsgsChanged);
-    let mut rr_event_to_send = Vec::new();
-
-    let mut to_ids = ContactIds::new();
 
     // helper method to handle early exit and memory cleanup
     let cleanup = |context: &Context,
                    create_event_to_send: &Option<CreateEvent>,
-                   created_db_entries: &Vec<(usize, MsgId)>,
-                   rr_event_to_send: &Vec<(u32, MsgId)>| {
+                   created_db_entries: &Vec<(usize, MsgId)>| {
         if let Some(create_event_to_send) = create_event_to_send {
             for (chat_id, msg_id) in created_db_entries {
                 let event = match create_event_to_send {
@@ -97,12 +90,6 @@ pub fn dc_receive_imf(
                 context.call_cb(event);
             }
         }
-        for (chat_id, msg_id) in rr_event_to_send {
-            context.call_cb(Event::MsgRead {
-                chat_id: *chat_id,
-                msg_id: *msg_id,
-            });
-        }
     };
 
     if let Some(value) = mime_parser.get(HeaderDef::Date) {
@@ -110,51 +97,37 @@ pub fn dc_receive_imf(
         sent_timestamp = mailparse::dateparse(value).unwrap_or_default();
     }
 
-    // Make sure, to_ids starts with the first To:-address (Cc: is added in the loop below pass)
-    if let Some(field) = mime_parser.get(HeaderDef::To) {
-        dc_add_or_lookup_contacts_by_address_list(
-            context,
-            &field,
-            if !incoming {
-                Origin::OutgoingTo
-            } else if incoming_origin.is_verified() {
-                Origin::IncomingTo
-            } else {
-                Origin::IncomingUnknownTo
-            },
-            &mut to_ids,
-        )?;
-    }
-
     // get From: (it can be an address list!) and check if it is known (for known From:'s we add
     // the other To:/Cc: in the 3rd pass)
     // or if From: is equal to SELF (in this case, it is any outgoing messages,
     // we do not check Return-Path any more as this is unreliable, see issue #150)
     let mut from_id = 0;
     let mut from_id_blocked = false;
+    let mut incoming = true;
+    let mut incoming_origin = Origin::Unknown;
 
     if let Some(field_from) = mime_parser.get(HeaderDef::From_) {
-        let mut from_ids = ContactIds::new();
-        dc_add_or_lookup_contacts_by_address_list(
+        let from_ids = dc_add_or_lookup_contacts_by_address_list(
             context,
             &field_from,
             Origin::IncomingUnknownFrom,
-            &mut from_ids,
         )?;
-        if from_ids.len() > 1 {
-            warn!(
-                context,
-                "mail has more than one address in From: {:?}", field_from
-            );
-        }
         if from_ids.contains(&DC_CONTACT_ID_SELF) {
             incoming = false;
-            if to_ids.len() == 1 && to_ids.contains(&DC_CONTACT_ID_SELF) {
-                from_id = DC_CONTACT_ID_SELF;
-            }
+            from_id = DC_CONTACT_ID_SELF;
+            incoming_origin = Origin::OutgoingBcc;
         } else if !from_ids.is_empty() {
+            if from_ids.len() > 1 {
+                warn!(
+                    context,
+                    "mail has more than one From address, only using first: {:?}", field_from
+                );
+            }
             from_id = from_ids.get_index(0).cloned().unwrap_or_default();
-            incoming_origin = Contact::get_origin_by_id(context, from_id, &mut from_id_blocked)
+            if let Ok(contact) = Contact::load_from_db(context, from_id) {
+                incoming_origin = contact.origin;
+                from_id_blocked = contact.blocked;
+            }
         } else {
             warn!(context, "mail has an empty From header: {:?}", field_from);
             // if there is no from given, from_id stays 0 which is just fine. These messages
@@ -163,6 +136,23 @@ pub fn dc_receive_imf(
         }
     }
 
+    let mut to_ids = ContactIds::new();
+    for header_def in &[HeaderDef::To, HeaderDef::Cc] {
+        if let Some(field) = mime_parser.get(header_def.clone()) {
+            to_ids.extend(&dc_add_or_lookup_contacts_by_address_list(
+                context,
+                &field,
+                if !incoming {
+                    Origin::OutgoingTo
+                } else if incoming_origin.is_known() {
+                    Origin::IncomingTo
+                } else {
+                    Origin::IncomingUnknownTo
+                },
+            )?);
+        }
+    }
+
     // Add parts
 
     let rfc724_mid = match mime_parser.get_rfc724_mid() {
@@ -179,53 +169,39 @@ pub fn dc_receive_imf(
             }
         }
     };
-    if mime_parser.get_last_nonmeta().is_some() {
+    if mime_parser.parts.last().is_some() {
         if let Err(err) = add_parts(
             context,
             &mut mime_parser,
             imf_raw,
             incoming,
-            &mut incoming_origin,
+            incoming_origin,
             server_folder.as_ref(),
             server_uid,
-            &mut to_ids,
+            &to_ids,
             &rfc724_mid,
             &mut sent_timestamp,
-            &mut from_id,
+            from_id,
             from_id_blocked,
             &mut hidden,
             &mut chat_id,
-            &mut to_id,
             flags,
             &mut needs_delete_job,
             &mut insert_msg_id,
             &mut created_db_entries,
             &mut create_event_to_send,
         ) {
-            cleanup(
-                context,
-                &create_event_to_send,
-                &created_db_entries,
-                &rr_event_to_send,
-            );
+            cleanup(context, &create_event_to_send, &created_db_entries);
             bail!("add_parts error: {:?}", err);
         }
     } else {
-        // there are no non-meta data in message, do some basic calculations so that the varaiables
+        // there are parts in this message, do some basic calculations so that the variables
         // are correct in the further processing
         if sent_timestamp > time() {
             sent_timestamp = time()
         }
     }
 
-    mime_parser.handle_reports(
-        from_id,
-        sent_timestamp,
-        &mut rr_event_to_send,
-        &server_folder,
-        server_uid,
-    );
-
     if mime_parser.location_kml.is_some() || mime_parser.message_kml.is_some() {
         save_locations(
             context,
@@ -238,7 +214,7 @@ pub fn dc_receive_imf(
     }
 
     if mime_parser.user_avatar != AvatarAction::None {
-        match contact::set_profile_image(&context, from_id, mime_parser.user_avatar) {
+        match contact::set_profile_image(&context, from_id, &mime_parser.user_avatar) {
             Ok(()) => {
                 context.call_cb(Event::ChatModified(chat_id));
             }
@@ -266,32 +242,28 @@ pub fn dc_receive_imf(
         "received message {} has Message-Id: {}", server_uid, rfc724_mid
     );
 
-    cleanup(
-        context,
-        &create_event_to_send,
-        &created_db_entries,
-        &rr_event_to_send,
-    );
+    cleanup(context, &create_event_to_send, &created_db_entries);
+
+    mime_parser.handle_reports(from_id, sent_timestamp, &server_folder, server_uid);
 
     Ok(())
 }
 
 fn add_parts(
     context: &Context,
-    mut mime_parser: &mut MimeParser,
+    mut mime_parser: &mut MimeMessage,
     imf_raw: &[u8],
     incoming: bool,
-    incoming_origin: &mut Origin,
+    incoming_origin: Origin,
     server_folder: impl AsRef<str>,
     server_uid: u32,
-    to_ids: &mut ContactIds,
+    to_ids: &ContactIds,
     rfc724_mid: &str,
     sent_timestamp: &mut i64,
-    from_id: &mut u32,
+    from_id: u32,
     from_id_blocked: bool,
     hidden: &mut bool,
     chat_id: &mut u32,
-    to_id: &mut u32,
     flags: u32,
     needs_delete_job: &mut bool,
     insert_msg_id: &mut MsgId,
@@ -299,30 +271,12 @@ fn add_parts(
     create_event_to_send: &mut Option<CreateEvent>,
 ) -> Result<()> {
     let mut state: MessageState;
-    let mut msgrmsg: i32;
     let mut chat_id_blocked = Blocked::Not;
     let mut sort_timestamp = 0;
     let mut rcvd_timestamp = 0;
     let mut mime_in_reply_to = String::new();
     let mut mime_references = String::new();
-
-    // collect the rest information, CC: is added to the to-list, BCC: is ignored
-    // (we should not add BCC to groups as this would split groups. We could add them as "known contacts",
-    // however, the benefit is very small and this may leak data that is expected to be hidden)
-    if let Some(fld_cc) = mime_parser.get(HeaderDef::Cc) {
-        dc_add_or_lookup_contacts_by_address_list(
-            context,
-            fld_cc,
-            if !incoming {
-                Origin::OutgoingCc
-            } else if incoming_origin.is_verified() {
-                Origin::IncomingCc
-            } else {
-                Origin::IncomingUnknownCc
-            },
-            to_ids,
-        )?;
-    }
+    let mut incoming_origin = incoming_origin;
 
     // check, if the mail is already in our database - if so, just update the folder/uid
     // (if the mail was moved around) and finish. (we may get a mail twice eg. if it is
@@ -337,18 +291,21 @@ fn add_parts(
         bail!("Message already in DB");
     }
 
-    // 1 or 0 for yes/no
-    msgrmsg = mime_parser.has_chat_version() as _;
-    if msgrmsg == 0 && is_reply_to_messenger_message(context, mime_parser) {
-        // 2=no, but is reply to messenger message
-        msgrmsg = 2;
-    }
+    let mut msgrmsg = if mime_parser.has_chat_version() {
+        MessengerMessage::Yes
+    } else if is_reply_to_messenger_message(context, mime_parser) {
+        MessengerMessage::Reply
+    } else {
+        MessengerMessage::No
+    };
     // incoming non-chat messages may be discarded;
     // maybe this can be optimized later, by checking the state before the message body is downloaded
     let mut allow_creation = true;
     let show_emails =
         ShowEmails::from_i32(context.get_config_int(Config::ShowEmails)).unwrap_or_default();
-    if mime_parser.is_system_message != SystemMessage::AutocryptSetupMessage && msgrmsg == 0 {
+    if mime_parser.is_system_message != SystemMessage::AutocryptSetupMessage
+        && msgrmsg == MessengerMessage::No
+    {
         // this message is a classic email not a chat-message nor a reply to one
         if show_emails == ShowEmails::Off {
             *chat_id = DC_CHAT_ID_TRASH;
@@ -362,45 +319,48 @@ fn add_parts(
     // - outgoing messages introduce a chat with the first to: address if they are sent by a messenger
     // - incoming messages introduce a chat only for known contacts if they are sent by a messenger
     // (of course, the user can add other chats manually later)
+    let to_id: u32;
+
     if incoming {
         state = if 0 != flags & DC_IMAP_SEEN {
             MessageState::InSeen
         } else {
             MessageState::InFresh
         };
-        *to_id = DC_CONTACT_ID_SELF;
-        let mut needs_stop_ongoing_process = false;
+        to_id = DC_CONTACT_ID_SELF;
 
         // handshake messages must be processed _before_ chats are created
         // (eg. contacs may be marked as verified)
         if mime_parser.get(HeaderDef::SecureJoin).is_some() {
             // avoid discarding by show_emails setting
-            msgrmsg = 1;
+            msgrmsg = MessengerMessage::Yes;
             *chat_id = 0;
             allow_creation = true;
-            match handle_securejoin_handshake(context, mime_parser, *from_id) {
-                Ok(ret) => {
-                    if ret.hide_this_msg {
-                        *hidden = true;
-                        *needs_delete_job = ret.delete_this_msg;
-                        state = MessageState::InSeen;
-                    }
-                    if let Some(status) = ret.bob_securejoin_success {
-                        context.bob.write().unwrap().status = status as i32;
-                    }
-                    needs_stop_ongoing_process = ret.stop_ongoing_process;
+            match handle_securejoin_handshake(context, mime_parser, from_id) {
+                Ok(securejoin::HandshakeMessage::Done) => {
+                    *hidden = true;
+                    *needs_delete_job = true;
+                    state = MessageState::InSeen;
+                }
+                Ok(securejoin::HandshakeMessage::Ignore) => {
+                    *hidden = true;
+                    state = MessageState::InSeen;
+                }
+                Ok(securejoin::HandshakeMessage::Propagate) => {
+                    // Message will still be processed as "member
+                    // added" or similar system message.
                 }
                 Err(err) => {
-                    warn!(
-                        context,
-                        "Unexpected messaged passed to Secure-Join handshake protocol: {}", err
-                    );
+                    *hidden = true;
+                    context.bob.write().unwrap().status = 0; // secure-join failed
+                    context.stop_ongoing();
+                    error!(context, "Error in Secure-Join message handling: {}", err);
                 }
             }
         }
 
         let (test_normal_chat_id, test_normal_chat_id_blocked) =
-            chat::lookup_by_contact_id(context, *from_id).unwrap_or_default();
+            chat::lookup_by_contact_id(context, from_id).unwrap_or_default();
 
         // get the chat_id - a chat_id here is no indicator that the chat is displayed in the normal list,
         // it might also be blocked and displayed in the deaddrop as a result
@@ -420,7 +380,7 @@ fn add_parts(
                 &mut mime_parser,
                 allow_creation,
                 create_blocked,
-                *from_id,
+                from_id,
                 to_ids,
             )?;
             *chat_id = new_chat_id;
@@ -441,7 +401,7 @@ fn add_parts(
 
         if *chat_id == 0 {
             // try to create a normal chat
-            let create_blocked = if *from_id == *to_id {
+            let create_blocked = if from_id == to_id {
                 Blocked::Not
             } else {
                 Blocked::Deaddrop
@@ -452,7 +412,7 @@ fn add_parts(
                 chat_id_blocked = test_normal_chat_id_blocked;
             } else if allow_creation {
                 let (id, bl) =
-                    chat::create_or_lookup_by_contact_id(context, *from_id, create_blocked)
+                    chat::create_or_lookup_by_contact_id(context, from_id, create_blocked)
                         .unwrap_or_default();
                 *chat_id = id;
                 chat_id_blocked = bl;
@@ -464,13 +424,13 @@ fn add_parts(
                 } else if is_reply_to_known_message(context, mime_parser) {
                     // we do not want any chat to be created implicitly.  Because of the origin-scale-up,
                     // the contact requests will pop up and this should be just fine.
-                    Contact::scaleup_origin_by_id(context, *from_id, Origin::IncomingReplyTo);
+                    Contact::scaleup_origin_by_id(context, from_id, Origin::IncomingReplyTo);
                     info!(
                         context,
                         "Message is a reply to a known message, mark sender as known.",
                     );
-                    if !incoming_origin.is_verified() {
-                        *incoming_origin = Origin::IncomingReplyTo;
+                    if !incoming_origin.is_known() {
+                        incoming_origin = Origin::IncomingReplyTo;
                     }
                 }
             }
@@ -485,35 +445,27 @@ fn add_parts(
         // to not result in a chatlist-contact-request (this would require the state FRESH)
         if Blocked::Not != chat_id_blocked
             && state == MessageState::InFresh
-            && !incoming_origin.is_verified()
-            && msgrmsg == 0
+            && !incoming_origin.is_known()
+            && msgrmsg == MessengerMessage::No
             && show_emails != ShowEmails::All
         {
             state = MessageState::InNoticed;
         }
-
-        if needs_stop_ongoing_process {
-            // The Secure-Join protocol finished and the group
-            // creation handling is done.  Stopping the ongoing
-            // process will let dc_join_securejoin() return.
-            context.stop_ongoing();
-        }
     } else {
         // Outgoing
 
         // the mail is on the IMAP server, probably it is also delivered.
         // We cannot recreate other states (read, error).
         state = MessageState::OutDelivered;
-        *from_id = DC_CONTACT_ID_SELF;
+        to_id = to_ids.get_index(0).cloned().unwrap_or_default();
         if !to_ids.is_empty() {
-            *to_id = to_ids.get_index(0).cloned().unwrap_or_default();
             if *chat_id == 0 {
                 let (new_chat_id, new_chat_id_blocked) = create_or_lookup_group(
                     context,
                     &mut mime_parser,
                     allow_creation,
                     Blocked::Not,
-                    *from_id,
+                    from_id,
                     to_ids,
                 )?;
                 *chat_id = new_chat_id;
@@ -525,14 +477,15 @@ fn add_parts(
                 }
             }
             if *chat_id == 0 && allow_creation {
-                let create_blocked = if 0 != msgrmsg && !Contact::is_blocked_load(context, *to_id) {
+                let create_blocked = if MessengerMessage::No != msgrmsg
+                    && !Contact::is_blocked_load(context, to_id)
+                {
                     Blocked::Not
                 } else {
                     Blocked::Deaddrop
                 };
-                let (id, bl) =
-                    chat::create_or_lookup_by_contact_id(context, *to_id, create_blocked)
-                        .unwrap_or_default();
+                let (id, bl) = chat::create_or_lookup_by_contact_id(context, to_id, create_blocked)
+                    .unwrap_or_default();
                 *chat_id = id;
                 chat_id_blocked = bl;
 
@@ -545,7 +498,7 @@ fn add_parts(
                 }
             }
         }
-        let self_sent = *from_id == DC_CONTACT_ID_SELF
+        let self_sent = from_id == DC_CONTACT_ID_SELF
             && to_ids.len() == 1
             && to_ids.contains(&DC_CONTACT_ID_SELF);
 
@@ -572,7 +525,7 @@ fn add_parts(
     calc_timestamps(
         context,
         *chat_id,
-        *from_id,
+        from_id,
         *sent_timestamp,
         0 == flags & DC_IMAP_SEEN,
         &mut sort_timestamp,
@@ -612,10 +565,6 @@ fn add_parts(
             let subject = mime_parser.get_subject().unwrap_or_default();
 
             for part in mime_parser.parts.iter_mut() {
-                if part.is_meta {
-                    continue;
-                }
-
                 if mime_parser.location_kml.is_some()
                     && icnt == 1
                     && (part.msg == "-location-" || part.msg.is_empty())
@@ -640,8 +589,8 @@ fn add_parts(
                     server_folder.as_ref(),
                     server_uid as i32,
                     *chat_id as i32,
-                    *from_id as i32,
-                    *to_id as i32,
+                    from_id as i32,
+                    to_id as i32,
                     sort_timestamp,
                     *sent_timestamp,
                     rcvd_timestamp,
@@ -696,7 +645,7 @@ fn add_parts(
 
 fn save_locations(
     context: &Context,
-    mime_parser: &MimeParser,
+    mime_parser: &MimeMessage,
     chat_id: u32,
     from_id: u32,
     insert_msg_id: MsgId,
@@ -795,7 +744,7 @@ fn calc_timestamps(
 #[allow(non_snake_case)]
 fn create_or_lookup_group(
     context: &Context,
-    mime_parser: &mut MimeParser,
+    mime_parser: &mut MimeMessage,
     allow_creation: bool,
     create_blocked: Blocked,
     from_id: u32,
@@ -828,10 +777,10 @@ fn create_or_lookup_group(
         }
         if grpid.is_empty() {
             if let Some(extracted_grpid) = extract_grpid(mime_parser, HeaderDef::InReplyTo) {
-                grpid = extracted_grpid;
+                grpid = extracted_grpid.to_string();
             } else if let Some(extracted_grpid) = extract_grpid(mime_parser, HeaderDef::References)
             {
-                grpid = extracted_grpid;
+                grpid = extracted_grpid.to_string();
             } else {
                 return create_or_lookup_adhoc_group(
                     context,
@@ -871,14 +820,14 @@ fn create_or_lookup_group(
     } else {
         let field = mime_parser.get(HeaderDef::ChatGroupMemberAdded).cloned();
         if let Some(optional_field) = field {
-            X_MrAddToGrp = Some(optional_field);
             mime_parser.is_system_message = SystemMessage::MemberAddedToGroup;
             better_msg = context.stock_system_msg(
                 StockMessage::MsgAddMember,
-                X_MrAddToGrp.as_ref().unwrap(),
+                &optional_field,
                 "",
                 from_id as u32,
-            )
+            );
+            X_MrAddToGrp = Some(optional_field);
         } else {
             let field = mime_parser.get(HeaderDef::ChatGroupNameChanged);
             if let Some(field) = field {
@@ -918,7 +867,8 @@ fn create_or_lookup_group(
     set_better_msg(mime_parser, &better_msg);
 
     // check, if we have a chat with this group ID
-    let (mut chat_id, chat_id_verified, _blocked) = chat::get_chat_id_by_grpid(context, &grpid);
+    let (mut chat_id, chat_id_verified, _blocked) =
+        chat::get_chat_id_by_grpid(context, &grpid).unwrap_or((0, false, Blocked::Not));
     if chat_id != 0 {
         if chat_id_verified {
             if let Err(err) =
@@ -929,10 +879,15 @@ fn create_or_lookup_group(
                 mime_parser.repl_msg_by_error(s);
             }
         }
-        // check if the sender is a member of the existing group -
-        // if not, we'll recreate the group list
         if !chat::is_contact_in_chat(context, chat_id, from_id as u32) {
-            recreate_member_list = true;
+            // The From-address is not part of this group.
+            // It could be a new user or a DSN from a mailer-daemon.
+            // in any case we do not want to recreate the member list
+            // but still show the message as part of the chat.
+            // After all, the sender has a reference/in-reply-to that
+            // points to this chat.
+            let s = context.stock_str(StockMessage::UnknownSenderForChat);
+            mime_parser.repl_msg_by_error(s.to_string());
         }
     }
 
@@ -1085,7 +1040,6 @@ fn create_or_lookup_group(
             }
         }
         send_EVENT_CHAT_MODIFIED = true;
-        chat::reset_gossiped_timestamp(context, chat_id)?;
     }
 
     if send_EVENT_CHAT_MODIFIED {
@@ -1095,23 +1049,19 @@ fn create_or_lookup_group(
 }
 
 /// try extract a grpid from a message-id list header value
-fn extract_grpid(mime_parser: &MimeParser, headerdef: HeaderDef) -> Option<String> {
-    if let Some(value) = mime_parser.get(headerdef) {
-        for part in value.split(',').map(str::trim) {
-            if !part.is_empty() {
-                if let Some(extracted_grpid) = dc_extract_grpid_from_rfc724_mid(part) {
-                    return Some(extracted_grpid.to_string());
-                }
-            }
-        }
-    }
-    None
+fn extract_grpid<'a>(mime_parser: &'a MimeMessage, headerdef: HeaderDef) -> Option<&'a str> {
+    let header = mime_parser.get(headerdef)?;
+    let parts = header
+        .split(',')
+        .map(str::trim)
+        .filter(|part| !part.is_empty());
+    parts.filter_map(dc_extract_grpid_from_rfc724_mid).next()
 }
 
 /// Handle groups for received messages, return chat_id/Blocked status on success
 fn create_or_lookup_adhoc_group(
     context: &Context,
-    mime_parser: &MimeParser,
+    mime_parser: &MimeMessage,
     allow_creation: bool,
     create_blocked: Blocked,
     from_id: u32,
@@ -1148,9 +1098,12 @@ fn create_or_lookup_adhoc_group(
     if !chat_ids.is_empty() {
         let chat_ids_str = join(chat_ids.iter().map(|x| x.to_string()), ",");
         let res = context.sql.query_row(
-            "SELECT c.id, c.blocked  FROM chats c  \
-             LEFT JOIN msgs m ON m.chat_id=c.id  WHERE c.id IN({})  ORDER BY m.timestamp DESC, m.id DESC  LIMIT 1;",
-            params!(chat_ids_str),
+            format!(
+                "SELECT c.id, c.blocked  FROM chats c  \
+                 LEFT JOIN msgs m ON m.chat_id=c.id  WHERE c.id IN({})  ORDER BY m.timestamp DESC, m.id DESC  LIMIT 1;",
+                chat_ids_str
+            ),
+            params![],
             |row| {
                 Ok((row.get::<_, i32>(0)?, row.get::<_, Option<Blocked>>(1)?.unwrap_or_default()))
             }
@@ -1227,10 +1180,23 @@ fn create_group_record(
     )
     .is_err()
     {
+        warn!(
+            context,
+            "Failed to create group '{}' for grpid={}",
+            grpname.as_ref(),
+            grpid.as_ref()
+        );
         return 0;
     }
-
-    sql::get_rowid(context, &context.sql, "chats", "grpid", grpid.as_ref())
+    let chat_id = sql::get_rowid(context, &context.sql, "chats", "grpid", grpid.as_ref());
+    info!(
+        context,
+        "Created group '{}' grpid={} as chat #{}",
+        grpname.as_ref(),
+        grpid.as_ref(),
+        chat_id
+    );
+    chat_id
 }
 
 fn create_adhoc_grp_id(context: &Context, member_ids: &[u32]) -> String {
@@ -1249,8 +1215,11 @@ fn create_adhoc_grp_id(context: &Context, member_ids: &[u32]) -> String {
     let members = context
         .sql
         .query_map(
-            "SELECT addr FROM contacts WHERE id IN({}) AND id!=1", // 1=DC_CONTACT_ID_SELF
-            params![member_ids_str],
+            format!(
+                "SELECT addr FROM contacts WHERE id IN({}) AND id!=1", // 1=DC_CONTACT_ID_SELF
+                member_ids_str
+            ),
+            params![],
             |row| row.get::<_, String>(0),
             |rows| {
                 let mut addrs = rows.collect::<std::result::Result<Vec<_>, _>>()?;
@@ -1274,7 +1243,6 @@ fn hex_hash(s: impl AsRef<str>) -> String {
     hex::encode(&result[..8])
 }
 
-#[allow(non_snake_case)]
 fn search_chat_ids_by_contact_ids(
     context: &Context,
     unsorted_contact_ids: &[u32],
@@ -1294,14 +1262,17 @@ fn search_chat_ids_by_contact_ids(
             contact_ids.sort();
             let contact_ids_str = join(contact_ids.iter().map(|x| x.to_string()), ",");
             context.sql.query_map(
-                "SELECT DISTINCT cc.chat_id, cc.contact_id \
-                 FROM chats_contacts cc \
-                 LEFT JOIN chats c ON c.id=cc.chat_id \
-                 WHERE cc.chat_id IN(SELECT chat_id FROM chats_contacts WHERE contact_id IN({})) \
-                 AND c.type=120 \
-                 AND cc.contact_id!=1 \
-                 ORDER BY cc.chat_id, cc.contact_id;", // 1=DC_CONTACT_ID_SELF
-                params![contact_ids_str],
+                format!(
+                    "SELECT DISTINCT cc.chat_id, cc.contact_id \
+                       FROM chats_contacts cc \
+                       LEFT JOIN chats c ON c.id=cc.chat_id \
+                       WHERE cc.chat_id IN(SELECT chat_id FROM chats_contacts WHERE contact_id IN({})) \
+                         AND c.type=120 \
+                         AND cc.contact_id!=1 \
+                       ORDER BY cc.chat_id, cc.contact_id;", // 1=DC_CONTACT_ID_SELF
+                    contact_ids_str
+                ),
+                params![],
                 |row| Ok((row.get::<_, u32>(0)?, row.get::<_, u32>(1)?)),
                 |rows| {
                     let mut last_chat_id = 0;
@@ -1328,8 +1299,8 @@ fn search_chat_ids_by_contact_ids(
                     if matches == contact_ids.len() && mismatches == 0 {
                         chat_ids.push(last_chat_id);
                     }
-                    Ok(())
-                },
+                Ok(())
+                }
             )?;
         }
     }
@@ -1339,7 +1310,7 @@ fn search_chat_ids_by_contact_ids(
 
 fn check_verified_properties(
     context: &Context,
-    mimeparser: &MimeParser,
+    mimeparser: &MimeMessage,
     from_id: u32,
     to_ids: &ContactIds,
 ) -> Result<()> {
@@ -1382,9 +1353,12 @@ fn check_verified_properties(
     let to_ids_str = join(to_ids.iter().map(|x| x.to_string()), ",");
 
     let rows = context.sql.query_map(
-        "SELECT c.addr, LENGTH(ps.verified_key_fingerprint)  FROM contacts c  \
-         LEFT JOIN acpeerstates ps ON c.addr=ps.addr  WHERE c.id IN({}) ",
-        params![to_ids_str],
+        format!(
+            "SELECT c.addr, LENGTH(ps.verified_key_fingerprint)  FROM contacts c  \
+             LEFT JOIN acpeerstates ps ON c.addr=ps.addr  WHERE c.id IN({}) ",
+            to_ids_str
+        ),
+        params![],
         |row| Ok((row.get::<_, String>(0)?, row.get::<_, i32>(1).unwrap_or(0))),
         |rows| {
             rows.collect::<std::result::Result<Vec<_>, _>>()
@@ -1400,31 +1374,31 @@ fn check_verified_properties(
             context.is_self_addr(&to_addr)
         );
         let mut is_verified = _is_verified != 0;
-        let mut peerstate = Peerstate::from_addr(context, &context.sql, &to_addr);
+        let peerstate = Peerstate::from_addr(context, &context.sql, &to_addr);
 
         // mark gossiped keys (if any) as verified
-        if mimeparser.gossipped_addr.contains(&to_addr) && peerstate.is_some() {
-            let peerstate = peerstate.as_mut().unwrap();
-
-            // if we're here, we know the gossip key is verified:
-            // - use the gossip-key as verified-key if there is no verified-key
-            // - OR if the verified-key does not match public-key or gossip-key
-            //   (otherwise a verified key can _only_ be updated through QR scan which might be annoying,
-            //   see https://github.com/nextleap-project/countermitm/issues/46 for a discussion about this point)
-            if !is_verified
-                || peerstate.verified_key_fingerprint != peerstate.public_key_fingerprint
-                    && peerstate.verified_key_fingerprint != peerstate.gossip_key_fingerprint
-            {
-                info!(context, "{} has verified {}.", contact.get_addr(), to_addr,);
-                let fp = peerstate.gossip_key_fingerprint.clone();
-                if let Some(fp) = fp {
-                    peerstate.set_verified(
-                        PeerstateKeyType::GossipKey,
-                        &fp,
-                        PeerstateVerifiedStatus::BidirectVerified,
-                    );
-                    peerstate.save_to_db(&context.sql, false)?;
-                    is_verified = true;
+        if mimeparser.gossipped_addr.contains(&to_addr) {
+            if let Some(mut peerstate) = peerstate {
+                // if we're here, we know the gossip key is verified:
+                // - use the gossip-key as verified-key if there is no verified-key
+                // - OR if the verified-key does not match public-key or gossip-key
+                //   (otherwise a verified key can _only_ be updated through QR scan which might be annoying,
+                //   see https://github.com/nextleap-project/countermitm/issues/46 for a discussion about this point)
+                if !is_verified
+                    || peerstate.verified_key_fingerprint != peerstate.public_key_fingerprint
+                        && peerstate.verified_key_fingerprint != peerstate.gossip_key_fingerprint
+                {
+                    info!(context, "{} has verified {}.", contact.get_addr(), to_addr,);
+                    let fp = peerstate.gossip_key_fingerprint.clone();
+                    if let Some(fp) = fp {
+                        peerstate.set_verified(
+                            PeerstateKeyType::GossipKey,
+                            &fp,
+                            PeerstateVerifiedStatus::BidirectVerified,
+                        );
+                        peerstate.save_to_db(&context.sql, false)?;
+                        is_verified = true;
+                    }
                 }
             }
         }
@@ -1438,7 +1412,7 @@ fn check_verified_properties(
     Ok(())
 }
 
-fn set_better_msg(mime_parser: &mut MimeParser, better_msg: impl AsRef<str>) {
+fn set_better_msg(mime_parser: &mut MimeMessage, better_msg: impl AsRef<str>) {
     let msg = better_msg.as_ref();
     if !msg.is_empty() && !mime_parser.parts.is_empty() {
         let part = &mut mime_parser.parts[0];
@@ -1448,7 +1422,7 @@ fn set_better_msg(mime_parser: &mut MimeParser, better_msg: impl AsRef<str>) {
     }
 }
 
-fn is_reply_to_known_message(context: &Context, mime_parser: &MimeParser) -> bool {
+fn is_reply_to_known_message(context: &Context, mime_parser: &MimeMessage) -> bool {
     /* check if the message is a reply to a known message; the replies are identified by the Message-ID from
     `In-Reply-To`/`References:` (to support non-Delta-Clients) */
 
@@ -1503,7 +1477,7 @@ fn is_known_rfc724_mid(context: &Context, rfc724_mid: &mailparse::MailAddr) -> b
 /// - checks also if any of the referenced IDs are send by a messenger
 /// - it is okay, if the referenced messages are moved to trash here
 /// - no check for the Chat-* headers (function is only called if it is no messenger message itself)
-fn is_reply_to_messenger_message(context: &Context, mime_parser: &MimeParser) -> bool {
+fn is_reply_to_messenger_message(context: &Context, mime_parser: &MimeMessage) -> bool {
     if let Some(value) = mime_parser.get(HeaderDef::InReplyTo) {
         if is_msgrmsg_rfc724_mid_in_list(context, &value) {
             return true;
@@ -1553,8 +1527,7 @@ fn dc_add_or_lookup_contacts_by_address_list(
     context: &Context,
     addr_list_raw: &str,
     origin: Origin,
-    to_ids: &mut ContactIds,
-) -> Result<()> {
+) -> Result<ContactIds> {
     let addrs = match mailparse::addrparse(addr_list_raw) {
         Ok(addrs) => addrs,
         Err(err) => {
@@ -1562,14 +1535,11 @@ fn dc_add_or_lookup_contacts_by_address_list(
         }
     };
 
-    info!(
-        context,
-        "dc_add_or_lookup_contacts_by_address raw={:?} addrs={:?}", addr_list_raw, addrs
-    );
+    let mut contact_ids = ContactIds::new();
     for addr in addrs.iter() {
         match addr {
             mailparse::MailAddr::Single(info) => {
-                to_ids.insert(add_or_lookup_contact_by_addr(
+                contact_ids.insert(add_or_lookup_contact_by_addr(
                     context,
                     &info.display_name,
                     &info.addr,
@@ -1578,7 +1548,7 @@ fn dc_add_or_lookup_contacts_by_address_list(
             }
             mailparse::MailAddr::Group(infos) => {
                 for info in &infos.addrs {
-                    to_ids.insert(add_or_lookup_contact_by_addr(
+                    contact_ids.insert(add_or_lookup_contact_by_addr(
                         context,
                         &info.display_name,
                         &info.addr,
@@ -1589,7 +1559,7 @@ fn dc_add_or_lookup_contacts_by_address_list(
         }
     }
 
-    Ok(())
+    Ok(contact_ids)
 }
 
 /// Add contacts to database on receiving messages.
@@ -1607,10 +1577,6 @@ fn add_or_lookup_contact_by_addr(
         .map(normalize_name)
         .unwrap_or_default();
 
-    info!(
-        context,
-        "looking up addr={:?} display_name={:?}", addr, display_name_normalized
-    );
     let (row_id, _modified) =
         Contact::add_or_lookup(context, display_name_normalized, addr, origin)?;
     ensure!(row_id > 0, "could not add contact: {:?}", addr);
@@ -1656,9 +1622,9 @@ mod tests {
                     References: <Gr.HcxyMARjyJy.9-uvzWPTLtV@nauta.cu>\n\
                     \n\
                     hello\x00";
-        let mimeparser = MimeParser::from_bytes(&context.ctx, &raw[..]).unwrap();
+        let mimeparser = MimeMessage::from_bytes(&context.ctx, &raw[..]).unwrap();
         assert_eq!(extract_grpid(&mimeparser, HeaderDef::InReplyTo), None);
-        let grpid = Some("HcxyMARjyJy".to_string());
+        let grpid = Some("HcxyMARjyJy");
         assert_eq!(extract_grpid(&mimeparser, HeaderDef::References), grpid);
     }
 
@@ -1671,8 +1637,8 @@ mod tests {
                     References: <qweqweqwe>, <Gr.HcxyMARjyJy.9-uvzWPTLtV@nau.ca>\n\
                     \n\
                     hello\x00";
-        let mimeparser = MimeParser::from_bytes(&context.ctx, &raw[..]).unwrap();
-        let grpid = Some("HcxyMARjyJy".to_string());
+        let mimeparser = MimeMessage::from_bytes(&context.ctx, &raw[..]).unwrap();
+        let grpid = Some("HcxyMARjyJy");
         assert_eq!(extract_grpid(&mimeparser, HeaderDef::InReplyTo), grpid);
         assert_eq!(extract_grpid(&mimeparser, HeaderDef::References), grpid);
     }

src/dc_simplify.rs

@@ -1,273 +0,0 @@
-use crate::dehtml::*;
-
-#[derive(Copy, Clone)]
-pub struct Simplify {
-    pub is_forwarded: bool,
-}
-
-/// Return index of footer line in vector of message lines, or vector length if
-/// no footer is found.
-///
-/// Also return whether not-standard (rfc3676, §4.3) footer is found.
-fn find_message_footer(lines: &[&str]) -> (usize, bool) {
-    for (ix, &line) in lines.iter().enumerate() {
-        // quoted-printable may encode `-- ` to `-- =20` which is converted
-        // back to `--  `
-        match line {
-            "-- " | "--  " => return (ix, false),
-            "--" | "---" | "----" => return (ix, true),
-            _ => (),
-        }
-    }
-    (lines.len(), false)
-}
-
-impl Simplify {
-    pub fn new() -> Self {
-        Simplify {
-            is_forwarded: false,
-        }
-    }
-
-    /// Simplify and normalise text: Remove quotes, signatures, unnecessary
-    /// lineends etc.
-    /// The data returned from simplify() must be free()'d when no longer used.
-    pub fn simplify(&mut self, input: &str, is_html: bool, is_msgrmsg: bool) -> String {
-        let mut out = if is_html {
-            dehtml(input)
-        } else {
-            input.to_string()
-        };
-
-        out.retain(|c| c != '\r');
-        out = self.simplify_plain_text(&out, is_msgrmsg);
-        out.retain(|c| c != '\r');
-
-        out
-    }
-
-    /**
-     * Simplify Plain Text
-     */
-    #[allow(non_snake_case, clippy::mut_range_bound, clippy::needless_range_loop)]
-    fn simplify_plain_text(&mut self, buf_terminated: &str, is_msgrmsg: bool) -> String {
-        /* This function ...
-        ... removes all text after the line `-- ` (footer mark)
-        ... removes full quotes at the beginning and at the end of the text -
-            these are all lines starting with the character `>`
-        ... remove a non-empty line before the removed quote (contains sth. like "On 2.9.2016, Bjoern wrote:" in different formats and lanugages) */
-        /* split the given buffer into lines */
-        let lines: Vec<_> = buf_terminated.split('\n').collect();
-        let mut l_first: usize = 0;
-        let mut is_cut_at_begin = false;
-        let (mut l_last, mut is_cut_at_end) = find_message_footer(&lines);
-
-        if l_last > l_first + 2 {
-            let line0 = lines[l_first];
-            let line1 = lines[l_first + 1];
-            let line2 = lines[l_first + 2];
-            if line0 == "---------- Forwarded message ----------"
-                && line1.starts_with("From: ")
-                && line2.is_empty()
-            {
-                self.is_forwarded = true;
-                l_first += 3
-            }
-        }
-        for l in l_first..l_last {
-            let line = lines[l];
-            if line == "-----"
-                || line == "_____"
-                || line == "====="
-                || line == "*****"
-                || line == "~~~~~"
-            {
-                l_last = l;
-                is_cut_at_end = true;
-                /* done */
-                break;
-            }
-        }
-        if !is_msgrmsg {
-            let mut l_lastQuotedLine = None;
-            for l in (l_first..l_last).rev() {
-                let line = lines[l];
-                if is_plain_quote(line) {
-                    l_lastQuotedLine = Some(l)
-                } else if !is_empty_line(line) {
-                    break;
-                }
-            }
-            if let Some(last_quoted_line) = l_lastQuotedLine {
-                l_last = last_quoted_line;
-                is_cut_at_end = true;
-                if l_last > 1 && is_empty_line(lines[l_last - 1]) {
-                    l_last -= 1
-                }
-                if l_last > 1 {
-                    let line = lines[l_last - 1];
-                    if is_quoted_headline(line) {
-                        l_last -= 1
-                    }
-                }
-            }
-        }
-        if !is_msgrmsg {
-            let mut l_lastQuotedLine_0 = None;
-            let mut hasQuotedHeadline = 0;
-            for l in l_first..l_last {
-                let line = lines[l];
-                if is_plain_quote(line) {
-                    l_lastQuotedLine_0 = Some(l)
-                } else if !is_empty_line(line) {
-                    if is_quoted_headline(line)
-                        && 0 == hasQuotedHeadline
-                        && l_lastQuotedLine_0.is_none()
-                    {
-                        hasQuotedHeadline = 1i32
-                    } else {
-                        /* non-quoting line found */
-                        break;
-                    }
-                }
-            }
-            if let Some(last_quoted_line) = l_lastQuotedLine_0 {
-                l_first = last_quoted_line + 1;
-                is_cut_at_begin = true
-            }
-        }
-        /* re-create buffer from the remaining lines */
-        let mut ret = String::new();
-        if is_cut_at_begin {
-            ret += "[...]";
-        }
-        /* we write empty lines only in case and non-empty line follows */
-        let mut pending_linebreaks = 0;
-        let mut content_lines_added = 0;
-        for l in l_first..l_last {
-            let line = lines[l];
-            if is_empty_line(line) {
-                pending_linebreaks += 1
-            } else {
-                if 0 != content_lines_added {
-                    if pending_linebreaks > 2i32 {
-                        pending_linebreaks = 2i32
-                    }
-                    while 0 != pending_linebreaks {
-                        ret += "\n";
-                        pending_linebreaks -= 1
-                    }
-                }
-                // the incoming message might contain invalid UTF8
-                ret += line;
-                content_lines_added += 1;
-                pending_linebreaks = 1i32
-            }
-        }
-        if is_cut_at_end && (!is_cut_at_begin || 0 != content_lines_added) {
-            ret += " [...]";
-        }
-
-        ret
-    }
-}
-
-/**
- * Tools
- */
-fn is_empty_line(buf: &str) -> bool {
-    // XXX: can it be simplified to buf.chars().all(|c| c.is_whitespace())?
-    //
-    // Strictly speaking, it is not equivalent (^A is not whitespace, but less than ' '),
-    // but having control sequences in email body?!
-    //
-    // See discussion at: https://github.com/deltachat/deltachat-core-rust/pull/402#discussion_r317062392
-    for c in buf.chars() {
-        if c > ' ' {
-            return false;
-        }
-    }
-
-    true
-}
-
-fn is_quoted_headline(buf: &str) -> bool {
-    /* This function may be called for the line _directly_ before a quote.
-    The function checks if the line contains sth. like "On 01.02.2016, xy@z wrote:" in various languages.
-    - Currently, we simply check if the last character is a ':'.
-    - Checking for the existence of an email address may fail (headlines may show the user's name instead of the address) */
-
-    buf.len() <= 80 && buf.ends_with(':')
-}
-
-fn is_plain_quote(buf: &str) -> bool {
-    buf.starts_with('>')
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use proptest::prelude::*;
-
-    proptest! {
-        #[test]
-        // proptest does not support [[:graphical:][:space:]] regex.
-        fn test_simplify_plain_text_fuzzy(input in "[!-~\t \n]+") {
-            let output = Simplify::new().simplify_plain_text(&input, true);
-            assert!(output.split('\n').all(|s| s != "-- "));
-        }
-    }
-
-    #[test]
-    fn test_simplify_trim() {
-        let mut simplify = Simplify::new();
-        let html = "\r\r\nline1<br>\r\n\r\n\r\rline2\n\r";
-        let plain = simplify.simplify(html, true, false);
-
-        assert_eq!(plain, "line1\nline2");
-    }
-
-    #[test]
-    fn test_simplify_parse_href() {
-        let mut simplify = Simplify::new();
-        let html = "<a href=url>text</a";
-        let plain = simplify.simplify(html, true, false);
-
-        assert_eq!(plain, "[text](url)");
-    }
-
-    #[test]
-    fn test_simplify_bold_text() {
-        let mut simplify = Simplify::new();
-        let html = "<!DOCTYPE name [<!DOCTYPE ...>]><!-- comment -->text <b><?php echo ... ?>bold</b><![CDATA[<>]]>";
-        let plain = simplify.simplify(html, true, false);
-
-        assert_eq!(plain, "text *bold*<>");
-    }
-
-    #[test]
-    fn test_simplify_html_encoded() {
-        let mut simplify = Simplify::new();
-        let html =
-                "&lt;&gt;&quot;&apos;&amp; &auml;&Auml;&ouml;&Ouml;&uuml;&Uuml;&szlig; foo&AElig;&ccedil;&Ccedil; &diams;&lrm;&rlm;&zwnj;&noent;&zwj;";
-
-        let plain = simplify.simplify(html, true, false);
-
-        assert_eq!(
-            plain,
-            "<>\"\'& äÄöÖüÜß fooÆçÇ \u{2666}\u{200e}\u{200f}\u{200c}&noent;\u{200d}"
-        );
-    }
-
-    #[test]
-    fn test_simplify_utilities() {
-        assert!(is_empty_line(" \t"));
-        assert!(is_empty_line(""));
-        assert!(is_empty_line(" \r"));
-        assert!(!is_empty_line(" x"));
-        assert!(is_plain_quote("> hello world"));
-        assert!(is_plain_quote(">>"));
-        assert!(!is_plain_quote("Life is pain"));
-        assert!(!is_plain_quote(""));
-    }
-}

src/dc_tools.rs

@@ -49,8 +49,8 @@ pub(crate) fn dc_truncate(buf: &str, approx_chars: usize, do_unwrap: bool) -> Co
 /// - harmonize together while being different enough
 /// (therefore, we cannot just use random rgb colors :)
 const COLORS: [u32; 16] = [
-    0xe56555, 0xf28c48, 0x8e85ee, 0x76c84d, 0x5bb6cc, 0x549cdd, 0xd25c99, 0xb37800, 0xf23030,
-    0x39b249, 0xbb243b, 0x964078, 0x66874f, 0x308ab9, 0x127ed0, 0xbe450c,
+    0xe5_65_55, 0xf2_8c_48, 0x8e_85_ee, 0x76_c8_4d, 0x5b_b6_cc, 0x54_9c_dd, 0xd2_5c_99, 0xb3_78_00,
+    0xf2_30_30, 0x39_b2_49, 0xbb_24_3b, 0x96_40_78, 0x66_87_4f, 0x30_8a_b9, 0x12_7e_d0, 0xbe_45_0c,
 ];
 
 pub(crate) fn dc_str_to_color(s: impl AsRef<str>) -> u32 {
@@ -59,7 +59,7 @@ pub(crate) fn dc_str_to_color(s: impl AsRef<str>) -> u32 {
     let bytes = str_lower.as_bytes();
     for (i, byte) in bytes.iter().enumerate() {
         checksum += (i + 1) * *byte as usize;
-        checksum %= 0xffffff;
+        checksum %= 0x00ff_ffff;
     }
     let color_index = checksum % COLORS.len();
 
@@ -260,7 +260,6 @@ pub fn dc_derive_safe_stem_ext(filename: &str) -> (String, String) {
 }
 
 // the returned suffix is lower-case
-#[allow(non_snake_case)]
 pub fn dc_get_filesuffix_lc(path_filename: impl AsRef<str>) -> Option<String> {
     Path::new(path_filename.as_ref())
         .extension()
@@ -381,11 +380,14 @@ pub(crate) fn dc_copy_file(
     }
 }
 
-pub(crate) fn dc_create_folder(context: &Context, path: impl AsRef<std::path::Path>) -> bool {
+pub(crate) fn dc_create_folder(
+    context: &Context,
+    path: impl AsRef<std::path::Path>,
+) -> Result<(), std::io::Error> {
     let path_abs = dc_get_abs_path(context, &path);
     if !path_abs.exists() {
         match fs::create_dir_all(path_abs) {
-            Ok(_) => true,
+            Ok(_) => Ok(()),
             Err(err) => {
                 warn!(
                     context,
@@ -393,11 +395,11 @@ pub(crate) fn dc_create_folder(context: &Context, path: impl AsRef<std::path::Pa
                     path.as_ref().display(),
                     err
                 );
-                false
+                Err(err)
             }
         }
     } else {
-        true
+        Ok(())
     }
 }
 
@@ -483,7 +485,7 @@ pub(crate) fn dc_get_next_backup_path(
 pub(crate) fn time() -> i64 {
     SystemTime::now()
         .duration_since(SystemTime::UNIX_EPOCH)
-        .unwrap()
+        .unwrap_or_default()
         .as_secs() as i64
 }
 
@@ -651,7 +653,6 @@ mod tests {
         );
     }
 
-    #[test]
     #[test]
     fn test_dc_extract_grpid_from_rfc724_mid() {
         // Should return None if we pass invalid mid
@@ -825,7 +826,7 @@ mod tests {
 
         assert!(dc_delete_file(context, "$BLOBDIR/foobar"));
         assert!(dc_delete_file(context, "$BLOBDIR/dada"));
-        assert!(dc_create_folder(context, "$BLOBDIR/foobar-folder"));
+        assert!(dc_create_folder(context, "$BLOBDIR/foobar-folder").is_ok());
         assert!(dc_file_exist(context, "$BLOBDIR/foobar-folder",));
         assert!(!dc_delete_file(context, "$BLOBDIR/foobar-folder"));
 

src/dehtml.rs

@@ -139,13 +139,12 @@ fn dehtml_starttag_cb<B: std::io::BufRead>(
             dehtml.add_text = AddText::YesPreserveLineEnds;
         }
         "a" => {
-            if let Some(href) = event.html_attributes().find(|attr| {
-                attr.as_ref()
-                    .map(|a| String::from_utf8_lossy(a.key).trim().to_lowercase() == "href")
-                    .unwrap_or_default()
-            }) {
+            if let Some(href) = event
+                .html_attributes()
+                .filter_map(|attr| attr.ok())
+                .find(|attr| String::from_utf8_lossy(attr.key).trim().to_lowercase() == "href")
+            {
                 let href = href
-                    .unwrap()
                     .unescape_and_decode_value(reader)
                     .unwrap_or_default()
                     .to_lowercase();
@@ -189,4 +188,41 @@ mod tests {
             assert_eq!(dehtml(input), output);
         }
     }
+
+    #[test]
+    fn test_dehtml_parse_br() {
+        let html = "\r\r\nline1<br>\r\n\r\n\r\rline2\n\r";
+        let plain = dehtml(html);
+
+        assert_eq!(plain, "line1\n\r\r\rline2");
+    }
+
+    #[test]
+    fn test_dehtml_parse_href() {
+        let html = "<a href=url>text</a";
+        let plain = dehtml(html);
+
+        assert_eq!(plain, "[text](url)");
+    }
+
+    #[test]
+    fn test_dehtml_bold_text() {
+        let html = "<!DOCTYPE name [<!DOCTYPE ...>]><!-- comment -->text <b><?php echo ... ?>bold</b><![CDATA[<>]]>";
+        let plain = dehtml(html);
+
+        assert_eq!(plain, "text *bold*<>");
+    }
+
+    #[test]
+    fn test_dehtml_html_encoded() {
+        let html =
+                "&lt;&gt;&quot;&apos;&amp; &auml;&Auml;&ouml;&Ouml;&uuml;&Uuml;&szlig; foo&AElig;&ccedil;&Ccedil; &diams;&lrm;&rlm;&zwnj;&noent;&zwj;";
+
+        let plain = dehtml(html);
+
+        assert_eq!(
+            plain,
+            "<>\"\'& äÄöÖüÜß fooÆçÇ \u{2666}\u{200e}\u{200f}\u{200c}&noent;\u{200d}"
+        );
+    }
 }

src/e2ee.rs

@@ -2,7 +2,7 @@
 
 use std::collections::HashSet;
 
-use mailparse::MailHeaderMap;
+use mailparse::{MailHeaderMap, ParsedMail};
 use num_traits::FromPrimitive;
 
 use crate::aheader::*;
@@ -14,7 +14,6 @@ use crate::keyring::*;
 use crate::peerstate::*;
 use crate::pgp;
 use crate::securejoin::handle_degrade_event;
-use crate::wrapmime;
 
 #[derive(Debug)]
 pub struct EncryptHelper {
@@ -118,7 +117,7 @@ impl EncryptHelper {
 
 pub fn try_decrypt(
     context: &Context,
-    mail: &mailparse::ParsedMail<'_>,
+    mail: &ParsedMail<'_>,
     message_time: i64,
 ) -> Result<(Option<Vec<u8>>, HashSet<String>)> {
     let from = mail
@@ -232,9 +231,36 @@ fn load_or_generate_self_public_key(context: &Context, self_addr: impl AsRef<str
     }
 }
 
+/// Returns a reference to the encrypted payload and validates the autocrypt structure.
+fn get_autocrypt_mime<'a, 'b>(mail: &'a ParsedMail<'b>) -> Result<&'a ParsedMail<'b>> {
+    ensure!(
+        mail.ctype.mimetype == "multipart/encrypted",
+        "Not a multipart/encrypted message: {}",
+        mail.ctype.mimetype
+    );
+    ensure!(
+        mail.subparts.len() == 2,
+        "Invalid Autocrypt Level 1 Mime Parts"
+    );
+
+    ensure!(
+        mail.subparts[0].ctype.mimetype == "application/pgp-encrypted",
+        "Invalid Autocrypt Level 1 version part: {:?}",
+        mail.subparts[0].ctype,
+    );
+
+    ensure!(
+        mail.subparts[1].ctype.mimetype == "application/octet-stream",
+        "Invalid Autocrypt Level 1 encrypted part: {:?}",
+        mail.subparts[1].ctype
+    );
+
+    Ok(&mail.subparts[1])
+}
+
 fn decrypt_if_autocrypt_message<'a>(
     context: &Context,
-    mail: &mailparse::ParsedMail<'a>,
+    mail: &ParsedMail<'a>,
     private_keyring: &Keyring,
     public_keyring_for_validate: &Keyring,
     ret_valid_signatures: &mut HashSet<String>,
@@ -246,7 +272,7 @@ fn decrypt_if_autocrypt_message<'a>(
     //
     // Errors are returned for failures related to decryption of AC-messages.
 
-    let encrypted_data_part = match wrapmime::get_autocrypt_mime(mail) {
+    let encrypted_data_part = match get_autocrypt_mime(mail) {
         Err(_) => {
             // not an autocrypt mime message, abort and ignore
             return Ok(None);
@@ -267,7 +293,7 @@ fn decrypt_if_autocrypt_message<'a>(
 /// Returns Ok(None) if nothing encrypted was found.
 fn decrypt_part(
     _context: &Context,
-    mail: &mailparse::ParsedMail<'_>,
+    mail: &ParsedMail<'_>,
     private_keyring: &Keyring,
     public_keyring_for_validate: &Keyring,
     ret_valid_signatures: &mut HashSet<String>,
@@ -313,7 +339,7 @@ fn has_decrypted_pgp_armor(input: &[u8]) -> bool {
 /// However, Delta Chat itself has no problem with encrypted multipart/report
 /// parts and MUAs should be encouraged to encrpyt multipart/reports as well so
 /// that we could use the normal Autocrypt processing.
-fn contains_report(mail: &mailparse::ParsedMail<'_>) -> bool {
+fn contains_report(mail: &ParsedMail<'_>) -> bool {
     mail.ctype.mimetype == "multipart/report"
 }
 

src/error.rs

@@ -6,34 +6,52 @@ use lettre_email::mime;
 pub enum Error {
     #[fail(display = "{:?}", _0)]
     Failure(failure::Error),
+
     #[fail(display = "SQL error: {:?}", _0)]
     SqlError(#[cause] crate::sql::Error),
+
     #[fail(display = "{:?}", _0)]
     Io(std::io::Error),
+
     #[fail(display = "{:?}", _0)]
     Message(String),
+
     #[fail(display = "{:?}", _0)]
     Image(image_meta::ImageError),
+
     #[fail(display = "{:?}", _0)]
     Utf8(std::str::Utf8Error),
+
     #[fail(display = "PGP: {:?}", _0)]
     Pgp(pgp::errors::Error),
+
     #[fail(display = "Base64Decode: {:?}", _0)]
     Base64Decode(base64::DecodeError),
+
     #[fail(display = "{:?}", _0)]
     FromUtf8(std::string::FromUtf8Error),
+
     #[fail(display = "{}", _0)]
     BlobError(#[cause] crate::blob::BlobError),
+
     #[fail(display = "Invalid Message ID.")]
     InvalidMsgId,
+
     #[fail(display = "Watch folder not found {:?}", _0)]
     WatchFolderNotFound(String),
+
     #[fail(display = "Invalid Email: {:?}", _0)]
     MailParseError(#[cause] mailparse::MailParseError),
+
     #[fail(display = "Building invalid Email: {:?}", _0)]
     LettreError(#[cause] lettre_email::error::Error),
+
+    #[fail(display = "SMTP error: {:?}", _0)]
+    SmtpError(#[cause] async_smtp::error::Error),
+
     #[fail(display = "FromStr error: {:?}", _0)]
     FromStr(#[cause] mime::FromStrError),
+
     #[fail(display = "Not Configured")]
     NotConfigured,
 }

src/events.rs

@@ -21,56 +21,38 @@ pub enum Event {
     /// The library-user may write an informational string to the log.
     /// Passed to the callback given to dc_context_new().
     /// This event should not be reported to the end-user using a popup or something like that.
-    ///
-    /// @return 0
     #[strum(props(id = "100"))]
     Info(String),
 
     /// Emitted when SMTP connection is established and login was successful.
-    ///
-    /// @return 0
     #[strum(props(id = "101"))]
     SmtpConnected(String),
 
     /// Emitted when IMAP connection is established and login was successful.
-    ///
-    /// @return 0
     #[strum(props(id = "102"))]
     ImapConnected(String),
 
     /// Emitted when a message was successfully sent to the SMTP server.
-    ///
-    /// @return 0
     #[strum(props(id = "103"))]
     SmtpMessageSent(String),
 
     /// Emitted when an IMAP message has been marked as deleted
-    ///
-    /// @return 0
     #[strum(props(id = "104"))]
     ImapMessageDeleted(String),
 
     /// Emitted when an IMAP message has been moved
-    ///
-    /// @return 0
     #[strum(props(id = "105"))]
     ImapMessageMoved(String),
 
     /// Emitted when an IMAP folder was emptied
-    ///
-    /// @return 0
     #[strum(props(id = "106"))]
     ImapFolderEmptied(String),
 
     /// Emitted when an new file in the $BLOBDIR was created
-    ///
-    /// @return 0
     #[strum(props(id = "150"))]
     NewBlobFile(String),
 
     /// Emitted when an new file in the $BLOBDIR was created
-    ///
-    /// @return 0
     #[strum(props(id = "151"))]
     DeletedBlobFile(String),
 
@@ -78,8 +60,6 @@ pub enum Event {
     /// Passed to the callback given to dc_context_new().
     ///
     /// This event should not be reported to the end-user using a popup or something like that.
-    ///
-    /// @return 0
     #[strum(props(id = "300"))]
     Warning(String),
 
@@ -94,8 +74,6 @@ pub enum Event {
     /// it might be better to delay showing these events until the function has really
     /// failed (returned false). It should be sufficient to report only the *last* error
     /// in a messasge box then.
-    ///
-    /// @return
     #[strum(props(id = "400"))]
     Error(String),
 
@@ -112,8 +90,6 @@ pub enum Event {
     /// Moreover, if the UI detects that the device is offline,
     /// it is probably more useful to report this to the user
     /// instead of the string from data2.
-    ///
-    /// @return 0
     #[strum(props(id = "401"))]
     ErrorNetwork(String),
 
@@ -122,8 +98,6 @@ pub enum Event {
     /// dc_set_chat_name(), dc_set_chat_profile_image(),
     /// dc_add_contact_to_chat(), dc_remove_contact_from_chat(),
     /// dc_send_text_msg() or another sending function.
-    ///
-    /// @return 0
     #[strum(props(id = "410"))]
     ErrorSelfNotInGroup(String),
 
@@ -132,8 +106,6 @@ pub enum Event {
     /// - Messages sent, received or removed
     /// - Chats created, deleted or archived
     /// - A draft has been set
-    ///
-    /// @return 0
     #[strum(props(id = "2000"))]
     MsgsChanged { chat_id: u32, msg_id: MsgId },
 
@@ -141,29 +113,21 @@ pub enum Event {
     /// when receiving this message.
     ///
     /// There is no extra #DC_EVENT_MSGS_CHANGED event send together with this event.
-    ///
-    /// @return 0
     #[strum(props(id = "2005"))]
     IncomingMsg { chat_id: u32, msg_id: MsgId },
 
     /// A single message is sent successfully. State changed from  DC_STATE_OUT_PENDING to
     /// DC_STATE_OUT_DELIVERED, see dc_msg_get_state().
-    ///
-    /// @return 0
     #[strum(props(id = "2010"))]
     MsgDelivered { chat_id: u32, msg_id: MsgId },
 
     /// A single message could not be sent. State changed from DC_STATE_OUT_PENDING or DC_STATE_OUT_DELIVERED to
     /// DC_STATE_OUT_FAILED, see dc_msg_get_state().
-    ///
-    /// @return 0
     #[strum(props(id = "2012"))]
     MsgFailed { chat_id: u32, msg_id: MsgId },
 
     /// A single message is read by the receiver. State changed from DC_STATE_OUT_DELIVERED to
     /// DC_STATE_OUT_MDN_RCVD, see dc_msg_get_state().
-    ///
-    /// @return 0
     #[strum(props(id = "2015"))]
     MsgRead { chat_id: u32, msg_id: MsgId },
 
@@ -171,15 +135,12 @@ pub enum Event {
     /// Or the verify state of a chat has changed.
     /// See dc_set_chat_name(), dc_set_chat_profile_image(), dc_add_contact_to_chat()
     /// and dc_remove_contact_from_chat().
-    ///
-    /// @return 0
     #[strum(props(id = "2020"))]
     ChatModified(u32),
 
     /// Contact(s) created, renamed, blocked or deleted.
     ///
     /// @param data1 (int) If set, this is the contact_id of an added contact that should be selected.
-    /// @return 0
     #[strum(props(id = "2030"))]
     ContactsChanged(Option<u32>),
 
@@ -188,14 +149,12 @@ pub enum Event {
     /// @param data1 (u32) contact_id of the contact for which the location has changed.
     ///     If the locations of several contacts have been changed,
     ///     eg. after calling dc_delete_all_locations(), this parameter is set to `None`.
-    /// @return 0
     #[strum(props(id = "2035"))]
     LocationChanged(Option<u32>),
 
     /// Inform about the configuration progress started by configure().
     ///
     /// @param data1 (usize) 0=error, 1-999=progress in permille, 1000=success and done
-    /// @return 0
     #[strum(props(id = "2041"))]
     ConfigureProgress(usize),
 
@@ -203,7 +162,6 @@ pub enum Event {
     ///
     /// @param data1 (usize) 0=error, 1-999=progress in permille, 1000=success and done
     /// @param data2 0
-    /// @return 0
     #[strum(props(id = "2051"))]
     ImexProgress(usize),
 
@@ -214,7 +172,6 @@ pub enum Event {
     /// services.
     ///
     /// @param data2 0
-    /// @return 0
     #[strum(props(id = "2052"))]
     ImexFileWritten(PathBuf),
 
@@ -230,7 +187,6 @@ pub enum Event {
     ///     600=vg-/vc-request-with-auth received, vg-member-added/vc-contact-confirm sent, typically shown as "bob@addr verified".
     ///     800=vg-member-added-received received, shown as "bob@addr securely joined GROUP", only sent for the verified-group-protocol.
     ///     1000=Protocol finished for this contact.
-    /// @return 0
     #[strum(props(id = "2060"))]
     SecurejoinInviterProgress { contact_id: u32, progress: usize },
 
@@ -242,14 +198,12 @@ pub enum Event {
     /// @param data2 (int) Progress as:
     ///     400=vg-/vc-request-with-auth sent, typically shown as "alice@addr verified, introducing myself."
     ///     (Bob has verified alice and waits until Alice does the same for him)
-    /// @return 0
     #[strum(props(id = "2061"))]
     SecurejoinJoinerProgress { contact_id: u32, progress: usize },
 
     /// This event is sent out to the inviter when a joiner successfully joined a group.
     /// @param data1 (int) chat_id
     /// @param data2 (int) contact_id
-    /// @return 0
     #[strum(props(id = "2062"))]
     SecurejoinMemberAdded { chat_id: u32, contact_id: u32 },
 }

src/headerdef.rs

@@ -10,6 +10,10 @@ pub enum HeaderDef {
     Cc,
     Disposition,
     OriginalMessageId,
+
+    /// Delta Chat extension for message IDs in combined MDNs
+    XAdditionalMessageIds,
+
     ListId,
     References,
     InReplyTo,

src/imap/idle.rs

@@ -241,7 +241,7 @@ impl Imap {
                 "IMAP-fake-IDLE done after {:.4}s",
                 SystemTime::now()
                     .duration_since(fake_idle_start_time)
-                    .unwrap()
+                    .unwrap_or_default()
                     .as_millis() as f64
                     / 1000.,
             );

src/imap/mod.rs

@@ -23,7 +23,6 @@ use crate::message::{self, update_server_uid};
 use crate::oauth2::dc_get_oauth2_access_token;
 use crate::param::Params;
 use crate::stock::StockMessage;
-use crate::wrapmime;
 
 mod idle;
 pub mod select_folder;
@@ -64,6 +63,9 @@ pub enum Error {
     #[fail(display = "IMAP select folder error")]
     SelectFolderError(#[cause] select_folder::Error),
 
+    #[fail(display = "No mailbox selected, folder: {:?}", _0)]
+    NoMailbox(String),
+
     #[fail(display = "IMAP other error: {:?}", _0)]
     Other(String),
 }
@@ -339,7 +341,7 @@ impl Imap {
         let param = LoginParam::from_database(context, "configured_");
         // the trailing underscore is correct
 
-        if self.connect(context, &param) {
+        if task::block_on(self.connect(context, &param)) {
             self.ensure_configured_folders(context, true)
         } else {
             Err(Error::ConnectionFailed(format!("{}", param)))
@@ -348,82 +350,80 @@ impl Imap {
 
     /// tries connecting to imap account using the specific login
     /// parameters
-    pub fn connect(&self, context: &Context, lp: &LoginParam) -> bool {
-        task::block_on(async move {
-            if lp.mail_server.is_empty() || lp.mail_user.is_empty() || lp.mail_pw.is_empty() {
-                return false;
-            }
+    pub async fn connect(&self, context: &Context, lp: &LoginParam) -> bool {
+        if lp.mail_server.is_empty() || lp.mail_user.is_empty() || lp.mail_pw.is_empty() {
+            return false;
+        }
 
-            {
-                let addr = &lp.addr;
-                let imap_server = &lp.mail_server;
-                let imap_port = lp.mail_port as u16;
-                let imap_user = &lp.mail_user;
-                let imap_pw = &lp.mail_pw;
-                let server_flags = lp.server_flags as usize;
+        {
+            let addr = &lp.addr;
+            let imap_server = &lp.mail_server;
+            let imap_port = lp.mail_port as u16;
+            let imap_user = &lp.mail_user;
+            let imap_pw = &lp.mail_pw;
+            let server_flags = lp.server_flags as usize;
 
-                let mut config = self.config.write().await;
-                config.addr = addr.to_string();
-                config.imap_server = imap_server.to_string();
-                config.imap_port = imap_port;
-                config.imap_user = imap_user.to_string();
-                config.imap_pw = imap_pw.to_string();
-                config.certificate_checks = lp.imap_certificate_checks;
-                config.server_flags = server_flags;
-            }
+            let mut config = self.config.write().await;
+            config.addr = addr.to_string();
+            config.imap_server = imap_server.to_string();
+            config.imap_port = imap_port;
+            config.imap_user = imap_user.to_string();
+            config.imap_pw = imap_pw.to_string();
+            config.certificate_checks = lp.imap_certificate_checks;
+            config.server_flags = server_flags;
+        }
 
-            if let Err(err) = self.setup_handle_if_needed(context).await {
-                warn!(context, "failed to setup imap handle: {}", err);
-                self.free_connect_params().await;
-                return false;
-            }
+        if let Err(err) = self.setup_handle_if_needed(context).await {
+            warn!(context, "failed to setup imap handle: {}", err);
+            self.free_connect_params().await;
+            return false;
+        }
 
-            let teardown = match &mut *self.session.lock().await {
-                Some(ref mut session) => match session.capabilities().await {
-                    Ok(caps) => {
-                        if !context.sql.is_open() {
-                            warn!(context, "IMAP-LOGIN as {} ok but ABORTING", lp.mail_user,);
-                            true
-                        } else {
-                            let can_idle = caps.has_str("IDLE");
-                            let has_xlist = caps.has_str("XLIST");
-                            let caps_list = caps.iter().fold(String::new(), |s, c| {
-                                if let Capability::Atom(x) = c {
-                                    s + &format!(" {}", x)
-                                } else {
-                                    s + &format!(" {:?}", c)
-                                }
-                            });
-
-                            self.config.write().await.can_idle = can_idle;
-                            self.config.write().await.has_xlist = has_xlist;
-                            *self.connected.lock().await = true;
-                            emit_event!(
-                                context,
-                                Event::ImapConnected(format!(
-                                    "IMAP-LOGIN as {}, capabilities: {}",
-                                    lp.mail_user, caps_list,
-                                ))
-                            );
-                            false
-                        }
-                    }
-                    Err(err) => {
-                        info!(context, "CAPABILITY command error: {}", err);
+        let teardown = match &mut *self.session.lock().await {
+            Some(ref mut session) => match session.capabilities().await {
+                Ok(caps) => {
+                    if !context.sql.is_open() {
+                        warn!(context, "IMAP-LOGIN as {} ok but ABORTING", lp.mail_user,);
                         true
+                    } else {
+                        let can_idle = caps.has_str("IDLE");
+                        let has_xlist = caps.has_str("XLIST");
+                        let caps_list = caps.iter().fold(String::new(), |s, c| {
+                            if let Capability::Atom(x) = c {
+                                s + &format!(" {}", x)
+                            } else {
+                                s + &format!(" {:?}", c)
+                            }
+                        });
+
+                        self.config.write().await.can_idle = can_idle;
+                        self.config.write().await.has_xlist = has_xlist;
+                        *self.connected.lock().await = true;
+                        emit_event!(
+                            context,
+                            Event::ImapConnected(format!(
+                                "IMAP-LOGIN as {}, capabilities: {}",
+                                lp.mail_user, caps_list,
+                            ))
+                        );
+                        false
                     }
-                },
-                None => true,
-            };
+                }
+                Err(err) => {
+                    info!(context, "CAPABILITY command error: {}", err);
+                    true
+                }
+            },
+            None => true,
+        };
 
-            if teardown {
-                self.disconnect(context);
+        if teardown {
+            self.disconnect(context);
 
-                false
-            } else {
-                true
-            }
-        })
+            false
+        } else {
+            true
+        }
     }
 
     pub fn disconnect(&self, context: &Context) {
@@ -481,7 +481,10 @@ impl Imap {
             let (uid_validity, last_seen_uid) = self.get_config_last_seen_uid(context, &folder);
 
             let config = self.config.read().await;
-            let mailbox = config.selected_mailbox.as_ref().expect("just selected");
+            let mailbox = config
+                .selected_mailbox
+                .as_ref()
+                .ok_or_else(|| Error::NoMailbox(folder.to_string()))?;
 
             let new_uid_validity = match mailbox.uid_validity {
                 Some(v) => v,
@@ -1225,6 +1228,18 @@ fn precheck_imf(context: &Context, rfc724_mid: &str, server_folder: &str, server
     }
 }
 
+fn parse_message_id(message_id: &[u8]) -> crate::error::Result<String> {
+    let value = std::str::from_utf8(message_id)?;
+    let addrs = mailparse::addrparse(value)
+        .map_err(|err| format_err!("failed to parse message id {:?}", err))?;
+
+    if let Some(info) = addrs.extract_single_info() {
+        return Ok(info.addr);
+    }
+
+    bail!("could not parse message_id: {}", value);
+}
+
 fn prefetch_get_message_id(prefetch_msg: &Fetch) -> Result<String> {
     if prefetch_msg.envelope().is_none() {
         return Err(Error::Other(
@@ -1237,5 +1252,22 @@ fn prefetch_get_message_id(prefetch_msg: &Fetch) -> Result<String> {
         return Err(Error::Other("prefetch: No message ID found".to_string()));
     }
 
-    wrapmime::parse_message_id(&message_id.unwrap()).map_err(Into::into)
+    parse_message_id(&message_id.unwrap()).map_err(Into::into)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_parse_message_id() {
+        assert_eq!(
+            parse_message_id(b"Mr.PRUe8HJBoaO.3whNvLCMFU0@testrun.org").unwrap(),
+            "Mr.PRUe8HJBoaO.3whNvLCMFU0@testrun.org"
+        );
+        assert_eq!(
+            parse_message_id(b"<Mr.PRUe8HJBoaO.3whNvLCMFU0@testrun.org>").unwrap(),
+            "Mr.PRUe8HJBoaO.3whNvLCMFU0@testrun.org"
+        );
+    }
 }

src/imap_client.rs

@@ -46,7 +46,7 @@ impl Client {
         let _greeting = client
             .read_response()
             .await
-            .expect("failed to read greeting");
+            .ok_or_else(|| ImapError::Bad("failed to read greeting".to_string()))?;
 
         Ok(Client::Secure(client))
     }
@@ -61,7 +61,7 @@ impl Client {
         let _greeting = client
             .read_response()
             .await
-            .expect("failed to read greeting");
+            .ok_or_else(|| ImapError::Bad("failed to read greeting".to_string()))?;
 
         Ok(Client::Insecure(client))
     }

src/imex.rs

@@ -8,6 +8,7 @@ use rand::{thread_rng, Rng};
 
 use crate::blob::BlobObject;
 use crate::chat;
+use crate::chat::delete_and_reset_all_device_msgs;
 use crate::config::Config;
 use crate::configure::*;
 use crate::constants::*;
@@ -33,16 +34,19 @@ pub enum ImexMode {
     /// and `private-key-default.asc`, if there are more keys, they are written to files as
     /// `public-key-<id>.asc` and `private-key-<id>.asc`
     ExportSelfKeys = 1,
+
     /// Import private keys found in the directory given as `param1`.
     /// The last imported key is made the default keys unless its name contains the string `legacy`.
     /// Public keys are not imported.
     ImportSelfKeys = 2,
+
     /// Export a backup to the directory given as `param1`.
     /// The backup contains all contacts, chats, images and other data and device independent settings.
     /// The backup does not contain device dependent settings as ringtones or LED notification settings.
     /// The name of the backup is typically `delta-chat.<day>.bak`, if more than one backup is create on a day,
     /// the format is `delta-chat.<day>-<number>.bak`
     ExportBackup = 11,
+
     /// `param1` is the file (not: directory) to import. The file is normally
     /// created by DC_IMEX_EXPORT_BACKUP and detected by dc_imex_has_backup(). Importing a backup
     /// is only possible as long as the context is not configured or used in another way.
@@ -133,14 +137,16 @@ fn do_initiate_key_transfer(context: &Context) -> Result<String> {
 
     let chat_id = chat::create_by_contact_id(context, DC_CONTACT_ID_SELF)?;
     msg = Message::default();
-    msg.type_0 = Viewtype::File;
+    msg.viewtype = Viewtype::File;
     msg.param.set(Param::File, setup_file_blob.as_name());
 
     msg.param
         .set(Param::MimeType, "application/autocrypt-setup");
     msg.param.set_cmd(SystemMessage::AutocryptSetupMessage);
-    msg.param
-        .set_int(Param::ForcePlaintext, DC_FP_NO_AUTOCRYPT_HEADER);
+    msg.param.set_int(
+        Param::ForcePlaintext,
+        ForcePlaintext::NoAutocryptHeader as i32,
+    );
 
     ensure!(!context.shall_stop_ongoing(), "canceled");
     let msg_id = chat::send_msg(context, chat_id, &mut msg)?;
@@ -380,7 +386,7 @@ pub fn JobImexImap(context: &Context, job: &Job) -> Result<()> {
             context.free_ongoing();
             bail!("Cannot create private key or private key not available.");
         } else {
-            dc_create_folder(context, &param);
+            dc_create_folder(context, &param)?;
         }
     }
     let path = Path::new(param);
@@ -438,6 +444,8 @@ fn import_backup(context: &Context, backup_to_import: impl AsRef<Path>) -> Resul
         "could not re-open db"
     );
 
+    delete_and_reset_all_device_msgs(&context)?;
+
     let total_files_cnt = context
         .sql
         .query_get_value::<_, isize>(context, "SELECT COUNT(*) FROM backup_blobs;", params![])

src/lib.rs

@@ -1,11 +1,8 @@
+#![forbid(unsafe_code)]
 #![deny(clippy::correctness, missing_debug_implementations, clippy::all)]
 // for now we hide warnings to not clutter/hide errors during "cargo clippy"
-#![allow(
-    clippy::type_complexity,
-    clippy::cognitive_complexity,
-    clippy::too_many_arguments
-)]
-#![allow(clippy::unreadable_literal, clippy::match_bool)]
+#![allow(clippy::cognitive_complexity, clippy::too_many_arguments)]
+#![allow(clippy::match_bool)]
 #![feature(ptr_wrapping_offset_from)]
 #![feature(drain_filter)]
 
@@ -24,7 +21,7 @@ extern crate strum_macros;
 extern crate debug_stub_derive;
 
 #[macro_use]
-mod log;
+pub mod log;
 #[macro_use]
 pub mod error;
 
@@ -46,6 +43,7 @@ mod e2ee;
 mod imap;
 mod imap_client;
 pub mod imex;
+#[macro_use]
 pub mod job;
 mod job_thread;
 pub mod key;
@@ -62,16 +60,15 @@ pub mod peerstate;
 pub mod pgp;
 pub mod qr;
 pub mod securejoin;
+mod simplify;
 mod smtp;
 pub mod sql;
 pub mod stock;
 mod token;
 #[macro_use]
-mod wrapmime;
 mod dehtml;
 
 pub mod dc_receive_imf;
-mod dc_simplify;
 pub mod dc_tools;
 
 /// if set imap/incoming and smtp/outgoing MIME messages will be printed

src/location.rs

@@ -11,7 +11,7 @@ use crate::context::*;
 use crate::dc_tools::*;
 use crate::error::Error;
 use crate::events::Event;
-use crate::job::*;
+use crate::job::{self, job_action_exists, job_add, Job};
 use crate::message::{Message, MsgId};
 use crate::mimeparser::SystemMessage;
 use crate::param::*;
@@ -228,7 +228,7 @@ pub fn send_locations_to_chat(context: &Context, chat_id: u32, seconds: i64) {
                 schedule_MAYBE_SEND_LOCATIONS(context, false);
                 job_add(
                     context,
-                    Action::MaybeSendLocationsEnded,
+                    job::Action::MaybeSendLocationsEnded,
                     chat_id as i32,
                     Params::new(),
                     seconds + 1,
@@ -240,8 +240,14 @@ pub fn send_locations_to_chat(context: &Context, chat_id: u32, seconds: i64) {
 
 #[allow(non_snake_case)]
 fn schedule_MAYBE_SEND_LOCATIONS(context: &Context, force_schedule: bool) {
-    if force_schedule || !job_action_exists(context, Action::MaybeSendLocations) {
-        job_add(context, Action::MaybeSendLocations, 0, Params::new(), 60);
+    if force_schedule || !job_action_exists(context, job::Action::MaybeSendLocations) {
+        job_add(
+            context,
+            job::Action::MaybeSendLocations,
+            0,
+            Params::new(),
+            60,
+        );
     };
 }
 
@@ -542,7 +548,7 @@ pub fn save(
 }
 
 #[allow(non_snake_case)]
-pub fn JobMaybeSendLocations(context: &Context, _job: &Job) {
+pub fn JobMaybeSendLocations(context: &Context, _job: &Job) -> job::Status {
     let now = time();
     let mut continue_streaming = false;
     info!(
@@ -629,38 +635,40 @@ pub fn JobMaybeSendLocations(context: &Context, _job: &Job) {
     if continue_streaming {
         schedule_MAYBE_SEND_LOCATIONS(context, true);
     }
+    job::Status::Finished(Ok(()))
 }
 
 #[allow(non_snake_case)]
-pub fn JobMaybeSendLocationsEnded(context: &Context, job: &mut Job) {
+pub fn JobMaybeSendLocationsEnded(context: &Context, job: &mut Job) -> job::Status {
     // this function is called when location-streaming _might_ have ended for a chat.
     // the function checks, if location-streaming is really ended;
     // if so, a device-message is added if not yet done.
 
     let chat_id = job.foreign_id;
 
-    if let Ok((send_begin, send_until)) = context.sql.query_row(
+    let (send_begin, send_until) = job_try!(context.sql.query_row(
         "SELECT locations_send_begin, locations_send_until  FROM chats  WHERE id=?",
         params![chat_id as i32],
         |row| Ok((row.get::<_, i64>(0)?, row.get::<_, i64>(1)?)),
-    ) {
-        if !(send_begin != 0 && time() <= send_until) {
-            // still streaming -
-            // may happen as several calls to dc_send_locations_to_chat()
-            // do not un-schedule pending DC_MAYBE_SEND_LOC_ENDED jobs
-            if !(send_begin == 0 && send_until == 0) {
-                // not streaming, device-message already sent
-                if context.sql.execute(
-                    "UPDATE chats    SET locations_send_begin=0, locations_send_until=0  WHERE id=?",
-                    params![chat_id as i32],
-                ).is_ok() {
-                    let stock_str = context.stock_system_msg(StockMessage::MsgLocationDisabled, "", "", 0);
-                    chat::add_info_msg(context, chat_id, stock_str);
-                    context.call_cb(Event::ChatModified(chat_id));
-                }
-            }
+    ));
+
+    if !(send_begin != 0 && time() <= send_until) {
+        // still streaming -
+        // may happen as several calls to dc_send_locations_to_chat()
+        // do not un-schedule pending DC_MAYBE_SEND_LOC_ENDED jobs
+        if !(send_begin == 0 && send_until == 0) {
+            // not streaming, device-message already sent
+            job_try!(context.sql.execute(
+                "UPDATE chats    SET locations_send_begin=0, locations_send_until=0  WHERE id=?",
+                params![chat_id as i32],
+            ));
+
+            let stock_str = context.stock_system_msg(StockMessage::MsgLocationDisabled, "", "", 0);
+            chat::add_info_msg(context, chat_id, stock_str);
+            context.call_cb(Event::ChatModified(chat_id));
         }
     }
+    job::Status::Finished(Ok(()))
 }
 
 #[cfg(test)]

src/log.rs

@@ -7,7 +7,13 @@ macro_rules! info {
     };
     ($ctx:expr, $msg:expr, $($args:expr),* $(,)?) => {{
         let formatted = format!($msg, $($args),*);
-        emit_event!($ctx, $crate::Event::Info(formatted));
+        let thread = ::std::thread::current();
+        let full = format!("{thid:?} {file}:{line}: {msg}",
+                           thid = thread.id(),
+                           file = file!(),
+                           line = line!(),
+                           msg = &formatted);
+        emit_event!($ctx, $crate::Event::Info(full));
     }};
 }
 
@@ -18,7 +24,13 @@ macro_rules! warn {
     };
     ($ctx:expr, $msg:expr, $($args:expr),* $(,)?) => {{
         let formatted = format!($msg, $($args),*);
-        emit_event!($ctx, $crate::Event::Warning(formatted));
+        let thread = ::std::thread::current();
+        let full = format!("{thid:?} {file}:{line}: {msg}",
+                           thid = thread.id(),
+                           file = file!(),
+                           line = line!(),
+                           msg = &formatted);
+        emit_event!($ctx, $crate::Event::Warning(full));
     }};
 }
 

src/lot.rs

@@ -73,20 +73,28 @@ pub enum LotState {
     // Qr States
     /// id=contact
     QrAskVerifyContact = 200,
+
     /// text1=groupname
     QrAskVerifyGroup = 202,
+
     /// id=contact
     QrFprOk = 210,
+
     /// id=contact
     QrFprMissmatch = 220,
+
     /// test1=formatted fingerprint
     QrFprWithoutAddr = 230,
+
     /// id=contact
     QrAddr = 320,
+
     /// text1=text
     QrText = 330,
+
     /// text1=URL
     QrUrl = 332,
+
     /// text1=error string
     QrError = 400,
 

src/message.rs

@@ -148,6 +148,22 @@ impl rusqlite::types::FromSql for MsgId {
 #[fail(display = "Invalid Message ID.")]
 pub struct InvalidMsgId;
 
+#[derive(Debug, Copy, Clone, PartialEq, FromPrimitive, ToPrimitive, FromSql, ToSql)]
+#[repr(u8)]
+pub enum MessengerMessage {
+    No = 0,
+    Yes = 1,
+
+    /// No, but reply to messenger message.
+    Reply = 2,
+}
+
+impl Default for MessengerMessage {
+    fn default() -> Self {
+        Self::No
+    }
+}
+
 /// An object representing a single message in memory.
 /// The message object is not updated.
 /// If you want an update, you have to recreate the object.
@@ -161,7 +177,7 @@ pub struct Message {
     pub(crate) from_id: u32,
     pub(crate) to_id: u32,
     pub(crate) chat_id: u32,
-    pub(crate) type_0: Viewtype,
+    pub(crate) viewtype: Viewtype,
     pub(crate) state: MessageState,
     pub(crate) hidden: bool,
     pub(crate) timestamp_sort: i64,
@@ -172,8 +188,7 @@ pub struct Message {
     pub(crate) in_reply_to: Option<String>,
     pub(crate) server_folder: Option<String>,
     pub(crate) server_uid: u32,
-    // TODO: enum
-    pub(crate) is_dc_message: u32,
+    pub(crate) is_dc_message: MessengerMessage,
     pub(crate) starred: bool,
     pub(crate) chat_blocked: Blocked,
     pub(crate) location_id: u32,
@@ -183,7 +198,7 @@ pub struct Message {
 impl Message {
     pub fn new(viewtype: Viewtype) -> Self {
         let mut msg = Message::default();
-        msg.type_0 = viewtype;
+        msg.viewtype = viewtype;
 
         msg
     }
@@ -236,7 +251,7 @@ impl Message {
                     msg.timestamp_sort = row.get("timestamp")?;
                     msg.timestamp_sent = row.get("timestamp_sent")?;
                     msg.timestamp_rcvd = row.get("timestamp_rcvd")?;
-                    msg.type_0 = row.get("type")?;
+                    msg.viewtype = row.get("type")?;
                     msg.state = row.get("state")?;
                     msg.is_dc_message = row.get("msgrmsg")?;
 
@@ -312,10 +327,10 @@ impl Message {
     }
 
     pub fn try_calc_and_set_dimensions(&mut self, context: &Context) -> Result<(), Error> {
-        if chat::msgtype_has_file(self.type_0) {
+        if chat::msgtype_has_file(self.viewtype) {
             let file_param = self.param.get_path(Param::File, context)?;
             if let Some(path_and_filename) = file_param {
-                if (self.type_0 == Viewtype::Image || self.type_0 == Viewtype::Gif)
+                if (self.viewtype == Viewtype::Image || self.viewtype == Viewtype::Gif)
                     && !self.param.exists(Param::Width)
                 {
                     self.param.set_int(Param::Width, 0);
@@ -394,7 +409,7 @@ impl Message {
     }
 
     pub fn get_viewtype(&self) -> Viewtype {
-        self.type_0
+        self.viewtype
     }
 
     pub fn get_state(&self) -> MessageState {
@@ -474,7 +489,7 @@ impl Message {
 
     pub fn get_summarytext(&self, context: &Context, approx_characters: usize) -> String {
         get_summarytext_by_raw(
-            self.type_0,
+            self.viewtype,
             self.text.as_ref(),
             &self.param,
             approx_characters,
@@ -518,11 +533,11 @@ impl Message {
     /// copied to the blobdir.  Thus those attachments need to be
     /// created immediately in the blobdir with a valid filename.
     pub fn is_increation(&self) -> bool {
-        chat::msgtype_has_file(self.type_0) && self.state == MessageState::OutPreparing
+        chat::msgtype_has_file(self.viewtype) && self.state == MessageState::OutPreparing
     }
 
     pub fn is_setupmessage(&self) -> bool {
-        if self.type_0 != Viewtype::File {
+        if self.viewtype != Viewtype::File {
             return false;
         }
 
@@ -595,18 +610,48 @@ impl Message {
     }
 }
 
-#[derive(Debug, Display, Clone, Copy, PartialEq, Eq, FromPrimitive, ToPrimitive, ToSql, FromSql)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq, FromPrimitive, ToPrimitive, ToSql, FromSql)]
 #[repr(i32)]
 pub enum MessageState {
     Undefined = 0,
+
+    /// Incoming *fresh* message. Fresh messages are neither noticed
+    /// nor seen and are typically shown in notifications.
     InFresh = 10,
+
+    /// Incoming *noticed* message. E.g. chat opened but message not
+    /// yet read - noticed messages are not counted as unread but did
+    /// not marked as read nor resulted in MDNs.
     InNoticed = 13,
+
+    /// Incoming message, really *seen* by the user. Marked as read on
+    /// IMAP and MDN may be sent.
     InSeen = 16,
+
+    /// For files which need time to be prepared before they can be
+    /// sent, the message enters this state before
+    /// OutPending.
     OutPreparing = 18,
+
+    /// Message saved as draft.
     OutDraft = 19,
+
+    /// The user has pressed the "send" button but the message is not
+    /// yet sent and is pending in some way. Maybe we're offline (no
+    /// checkmark).
     OutPending = 20,
+
+    /// *Unrecoverable* error (*recoverable* errors result in pending
+    /// messages).
     OutFailed = 24,
+
+    /// Outgoing message successfully delivered to server (one
+    /// checkmark). Note, that already delivered messages may get into
+    /// the OutFailed state if we get such a hint from the server.
     OutDelivered = 26,
+
+    /// Outgoing message read by the recipient (two checkmarks; this
+    /// requires goodwill on the receiver's side)
     OutMdnRcvd = 28,
 }
 
@@ -616,6 +661,27 @@ impl Default for MessageState {
     }
 }
 
+impl std::fmt::Display for MessageState {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        write!(
+            f,
+            "{}",
+            match self {
+                Self::Undefined => "Undefined",
+                Self::InFresh => "Fresh",
+                Self::InNoticed => "Noticed",
+                Self::InSeen => "Seen",
+                Self::OutPreparing => "Preparing",
+                Self::OutDraft => "Draft",
+                Self::OutPending => "Pending",
+                Self::OutFailed => "Failed",
+                Self::OutDelivered => "Delivered",
+                Self::OutMdnRcvd => "Read",
+            }
+        )
+    }
+}
+
 impl From<MessageState> for LotState {
     fn from(s: MessageState) -> Self {
         use MessageState::*;
@@ -687,7 +753,7 @@ impl Lot {
         }
 
         self.text2 = Some(get_summarytext_by_raw(
-            msg.type_0,
+            msg.viewtype,
             msg.text.as_ref(),
             &msg.param,
             SUMMARY_CHARACTERS,
@@ -720,7 +786,7 @@ pub fn get_msg_info(context: &Context, msg_id: MsgId) -> String {
         return ret;
     }
     let rawtxt = rawtxt.unwrap_or_default();
-    let rawtxt = dc_truncate(rawtxt.trim(), 100000, false);
+    let rawtxt = dc_truncate(rawtxt.trim(), 100_000, false);
 
     let fts = dc_timestamp_to_str(msg.get_timestamp());
     ret += &format!("Sent: {}", fts);
@@ -770,19 +836,7 @@ pub fn get_msg_info(context: &Context, msg_id: MsgId) -> String {
         }
     }
 
-    ret += "State: ";
-    use MessageState::*;
-    match msg.state {
-        InFresh => ret += "Fresh",
-        InNoticed => ret += "Noticed",
-        InSeen => ret += "Seen",
-        OutDelivered => ret += "Delivered",
-        OutFailed => ret += "Failed",
-        OutMdnRcvd => ret += "Read",
-        OutPending => ret += "Pending",
-        OutPreparing => ret += "Preparing",
-        _ => ret += &format!("{}", msg.state),
-    }
+    ret += &format!("State: {}", msg.state);
 
     if msg.has_location() {
         ret += ", Location sent";
@@ -808,9 +862,9 @@ pub fn get_msg_info(context: &Context, msg_id: MsgId) -> String {
         ret += &format!("\nFile: {}, {}, bytes\n", path.display(), bytes);
     }
 
-    if msg.type_0 != Viewtype::Text {
+    if msg.viewtype != Viewtype::Text {
         ret += "Type: ";
-        ret += &format!("{}", msg.type_0);
+        ret += &format!("{}", msg.viewtype);
         ret += "\n";
         ret += &format!("Mimetype: {}\n", &msg.get_filemime().unwrap_or_default());
     }
@@ -844,6 +898,7 @@ pub fn guess_msgtype_from_suffix(path: &Path) -> Option<(Viewtype, &str)> {
         "mp3" => (Viewtype::Audio, "audio/mpeg"),
         "aac" => (Viewtype::Audio, "audio/aac"),
         "mp4" => (Viewtype::Video, "video/mp4"),
+        "webm" => (Viewtype::Video, "video/webm"),
         "jpg" => (Viewtype::Image, "image/jpeg"),
         "jpeg" => (Viewtype::Image, "image/jpeg"),
         "jpe" => (Viewtype::Image, "image/jpeg"),

src/mimefactory.rs

@@ -11,36 +11,35 @@ use crate::dc_tools::*;
 use crate::e2ee::*;
 use crate::error::Error;
 use crate::location;
-use crate::message::MsgId;
 use crate::message::{self, Message};
 use crate::mimeparser::SystemMessage;
 use crate::param::*;
 use crate::peerstate::{Peerstate, PeerstateVerifiedStatus};
 use crate::stock::StockMessage;
 
-#[derive(Clone, Copy, Eq, PartialEq)]
+#[derive(Debug, Clone)]
 pub enum Loaded {
-    Message,
-    MDN,
+    Message { chat: Chat },
+    MDN { additional_msg_ids: Vec<String> },
 }
 
 /// Helper to construct mime messages.
-#[derive(Clone)]
+#[derive(Debug, Clone)]
 pub struct MimeFactory<'a, 'b> {
-    pub from_addr: String,
-    pub from_displayname: String,
-    pub selfstatus: String,
-    pub recipients_names: Vec<String>,
-    pub recipients_addr: Vec<String>,
-    pub timestamp: i64,
-    pub loaded: Loaded,
-    pub msg: &'b Message,
-    pub chat: Option<Chat>,
-    pub increation: bool,
-    pub in_reply_to: String,
-    pub references: String,
-    pub req_mdn: bool,
-    pub context: &'a Context,
+    from_addr: String,
+    from_displayname: String,
+    selfstatus: String,
+
+    /// Vector of pairs of recipient name and address
+    recipients: Vec<(String, String)>,
+
+    timestamp: i64,
+    loaded: Loaded,
+    msg: &'b Message,
+    in_reply_to: String,
+    references: String,
+    req_mdn: bool,
+    context: &'a Context,
     last_added_location_id: u32,
     attach_selfavatar: bool,
 }
@@ -53,8 +52,6 @@ pub struct RenderedEmail {
     pub is_encrypted: bool,
     pub is_gossiped: bool,
     pub last_added_location_id: u32,
-    /// None for MDN, the message id otherwise
-    pub foreign_id: Option<MsgId>,
 
     pub from: String,
     pub recipients: Vec<String>,
@@ -71,44 +68,22 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
     ) -> Result<MimeFactory<'a, 'b>, Error> {
         let chat = Chat::load_from_db(context, msg.chat_id)?;
 
-        let mut factory = MimeFactory {
-            from_addr: context
-                .get_config(Config::ConfiguredAddr)
-                .unwrap_or_default(),
-            from_displayname: context.get_config(Config::Displayname).unwrap_or_default(),
-            selfstatus: context
-                .get_config(Config::Selfstatus)
-                .unwrap_or_else(|| context.stock_str(StockMessage::StatusLine).to_string()),
-            recipients_names: Vec::with_capacity(5),
-            recipients_addr: Vec::with_capacity(5),
-            timestamp: msg.timestamp_sort,
-            loaded: Loaded::Message,
-            msg,
-            chat: Some(chat),
-            increation: msg.is_increation(),
-            in_reply_to: String::default(),
-            references: String::default(),
-            req_mdn: false,
-            last_added_location_id: 0,
-            attach_selfavatar: add_selfavatar,
-            context,
-        };
-
-        // just set the chat above
-        let chat = factory.chat.as_ref().unwrap();
+        let from_addr = context
+            .get_config(Config::ConfiguredAddr)
+            .unwrap_or_default();
+        let from_displayname = context.get_config(Config::Displayname).unwrap_or_default();
+        let mut recipients = Vec::with_capacity(5);
+        let mut req_mdn = false;
 
         if chat.is_self_talk() {
-            factory
-                .recipients_names
-                .push(factory.from_displayname.to_string());
-            factory.recipients_addr.push(factory.from_addr.to_string());
+            recipients.push((from_displayname.to_string(), from_addr.to_string()));
         } else {
             context.sql.query_map(
                 "SELECT c.authname, c.addr  \
                  FROM chats_contacts cc  \
                  LEFT JOIN contacts c ON cc.contact_id=c.id  \
                  WHERE cc.chat_id=? AND cc.contact_id>9;",
-                params![factory.msg.chat_id as i32],
+                params![msg.chat_id as i32],
                 |row| {
                     let authname: String = row.get(0)?;
                     let addr: String = row.get(1)?;
@@ -117,17 +92,15 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
                 |rows| {
                     for row in rows {
                         let (authname, addr) = row?;
-                        if !vec_contains_lowercase(&factory.recipients_addr, &addr) {
-                            factory.recipients_addr.push(addr);
-                            factory.recipients_names.push(authname);
+                        if !recipients_contain_addr(&recipients, &addr) {
+                            recipients.push((authname, addr));
                         }
                     }
                     Ok(())
                 },
             )?;
 
-            let command = factory.msg.param.get_cmd();
-            let msg = &factory.msg;
+            let command = msg.param.get_cmd();
 
             /* for added members, the list is just fine */
             if command == SystemMessage::MemberRemovedFromGroup {
@@ -139,20 +112,19 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
 
                 if !email_to_remove.is_empty()
                     && !addr_cmp(email_to_remove, self_addr)
-                    && !vec_contains_lowercase(&factory.recipients_addr, &email_to_remove)
+                    && !recipients_contain_addr(&recipients, &email_to_remove)
                 {
-                    factory.recipients_names.push("".to_string());
-                    factory.recipients_addr.push(email_to_remove.to_string());
+                    recipients.push(("".to_string(), email_to_remove.to_string()));
                 }
             }
             if command != SystemMessage::AutocryptSetupMessage
                 && command != SystemMessage::SecurejoinMessage
                 && context.get_config_bool(Config::MdnsEnabled)
             {
-                factory.req_mdn = true;
+                req_mdn = true;
             }
         }
-        let row = context.sql.query_row(
+        let (in_reply_to, references) = context.sql.query_row(
             "SELECT mime_in_reply_to, mime_references FROM msgs WHERE id=?",
             params![msg.id],
             |row| {
@@ -164,39 +136,37 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
                     render_rfc724_mid_list(&references),
                 ))
             },
-        );
-
-        match row {
-            Ok((in_reply_to, references)) => {
-                factory.in_reply_to = in_reply_to;
-                factory.references = references;
-            }
-            Err(err) => {
-                error!(
-                    context,
-                    "mimefactory: failed to load mime_in_reply_to: {:?}", err
-                );
-            }
-        }
+        )?;
 
+        let factory = MimeFactory {
+            from_addr,
+            from_displayname,
+            selfstatus: context
+                .get_config(Config::Selfstatus)
+                .unwrap_or_else(|| context.stock_str(StockMessage::StatusLine).to_string()),
+            recipients,
+            timestamp: msg.timestamp_sort,
+            loaded: Loaded::Message { chat },
+            msg,
+            in_reply_to,
+            references,
+            req_mdn,
+            last_added_location_id: 0,
+            attach_selfavatar: add_selfavatar,
+            context,
+        };
         Ok(factory)
     }
 
-    pub fn from_mdn(context: &'a Context, msg: &'b Message) -> Result<Self, Error> {
-        // MDNs not enabled - check this is late, in the job. the
-        // user may have changed its choice while offline ...
-        ensure!(
-            context.get_config_bool(Config::MdnsEnabled),
-            "MDNs meanwhile disabled"
-        );
+    pub fn from_mdn(
+        context: &'a Context,
+        msg: &'b Message,
+        additional_msg_ids: Vec<String>,
+    ) -> Result<Self, Error> {
+        ensure!(msg.chat_id > DC_CHAT_ID_LAST_SPECIAL, "Invalid chat id");
 
         let contact = Contact::load_from_db(context, msg.from_id)?;
 
-        // Do not send MDNs trash etc.; chats.blocked is already checked by the caller
-        // in dc_markseen_msgs()
-        ensure!(!contact.is_blocked(), "Contact blocked");
-        ensure!(msg.chat_id > DC_CHAT_ID_LAST_SPECIAL, "Invalid chat id");
-
         Ok(MimeFactory {
             context,
             from_addr: context
@@ -206,13 +176,13 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
             selfstatus: context
                 .get_config(Config::Selfstatus)
                 .unwrap_or_else(|| context.stock_str(StockMessage::StatusLine).to_string()),
-            recipients_names: vec![contact.get_authname().to_string()],
-            recipients_addr: vec![contact.get_addr().to_string()],
+            recipients: vec![(
+                contact.get_authname().to_string(),
+                contact.get_addr().to_string(),
+            )],
             timestamp: dc_create_smeared_timestamp(context),
-            loaded: Loaded::MDN,
+            loaded: Loaded::MDN { additional_msg_ids },
             msg,
-            chat: None,
-            increation: false,
             in_reply_to: String::default(),
             references: String::default(),
             req_mdn: false,
@@ -228,10 +198,10 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
             .ok_or_else(|| format_err!("Not configured"))?;
 
         Ok(self
-            .recipients_addr
+            .recipients
             .iter()
-            .filter(|addr| *addr != &self_addr)
-            .map(|addr| {
+            .filter(|(_, addr)| addr != &self_addr)
+            .map(|(_, addr)| {
                 (
                     Peerstate::from_addr(self.context, &self.context.sql, addr),
                     addr.as_str(),
@@ -240,10 +210,10 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
             .collect())
     }
 
-    fn is_e2ee_guranteed(&self) -> bool {
-        match self.loaded {
-            Loaded::Message => {
-                if self.chat.as_ref().unwrap().typ == Chattype::VerifiedGroup {
+    fn is_e2ee_guaranteed(&self) -> bool {
+        match &self.loaded {
+            Loaded::Message { chat } => {
+                if chat.typ == Chattype::VerifiedGroup {
                     return true;
                 }
 
@@ -264,28 +234,26 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
 
                 false
             }
-            Loaded::MDN => false,
+            Loaded::MDN { .. } => false,
         }
     }
 
     fn min_verified(&self) -> PeerstateVerifiedStatus {
-        match self.loaded {
-            Loaded::Message => {
-                let chat = self.chat.as_ref().unwrap();
+        match &self.loaded {
+            Loaded::Message { chat } => {
                 if chat.typ == Chattype::VerifiedGroup {
                     PeerstateVerifiedStatus::BidirectVerified
                 } else {
                     PeerstateVerifiedStatus::Unverified
                 }
             }
-            Loaded::MDN => PeerstateVerifiedStatus::Unverified,
+            Loaded::MDN { .. } => PeerstateVerifiedStatus::Unverified,
         }
     }
 
     fn should_force_plaintext(&self) -> i32 {
-        match self.loaded {
-            Loaded::Message => {
-                let chat = self.chat.as_ref().unwrap();
+        match &self.loaded {
+            Loaded::Message { chat } => {
                 if chat.typ == Chattype::VerifiedGroup {
                     0
                 } else {
@@ -295,30 +263,28 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
                         .unwrap_or_default()
                 }
             }
-            Loaded::MDN => DC_FP_NO_AUTOCRYPT_HEADER,
+            Loaded::MDN { .. } => ForcePlaintext::NoAutocryptHeader as i32,
         }
     }
 
     fn should_do_gossip(&self) -> bool {
-        match self.loaded {
-            Loaded::Message => {
-                let chat = self.chat.as_ref().unwrap();
+        match &self.loaded {
+            Loaded::Message { chat } => {
                 // beside key- and member-changes, force re-gossip every 48 hours
                 let gossiped_timestamp = chat.get_gossiped_timestamp(self.context);
-                if gossiped_timestamp == 0 || (gossiped_timestamp + (2 * 24 * 60 * 60)) > time() {
+                if time() > gossiped_timestamp + (2 * 24 * 60 * 60) {
                     return true;
                 }
 
                 self.msg.param.get_cmd() == SystemMessage::MemberAddedToGroup
             }
-            Loaded::MDN => false,
+            Loaded::MDN { .. } => false,
         }
     }
 
     fn grpimage(&self) -> Option<String> {
-        match self.loaded {
-            Loaded::Message => {
-                let chat = self.chat.as_ref().unwrap();
+        match &self.loaded {
+            Loaded::Message { chat } => {
                 let cmd = self.msg.param.get_cmd();
 
                 match cmd {
@@ -342,51 +308,37 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
 
                 None
             }
-            Loaded::MDN => None,
+            Loaded::MDN { .. } => None,
         }
     }
 
     fn subject_str(&self) -> String {
         match self.loaded {
-            Loaded::Message => {
-                match self.chat {
-                    Some(ref chat) => {
-                        let raw = message::get_summarytext_by_raw(
-                            self.msg.type_0,
-                            self.msg.text.as_ref(),
-                            &self.msg.param,
-                            32,
-                            self.context,
-                        );
-                        let mut lines = raw.lines();
-                        let raw_subject = if let Some(line) = lines.next() {
-                            line
-                        } else {
-                            ""
-                        };
-
-                        let afwd_email = self.msg.param.exists(Param::Forwarded);
-                        let fwd = if afwd_email { "Fwd: " } else { "" };
-
-                        if self.msg.param.get_cmd() == SystemMessage::AutocryptSetupMessage {
-                            // do not add the "Chat:" prefix for setup messages
-                            self.context
-                                .stock_str(StockMessage::AcSetupMsgSubject)
-                                .into_owned()
-                        } else if chat.typ == Chattype::Group || chat.typ == Chattype::VerifiedGroup
-                        {
-                            format!("Chat: {}: {}{}", chat.name, fwd, raw_subject)
-                        } else {
-                            format!("Chat: {}{}", fwd, raw_subject)
-                        }
-                    }
-                    None => String::new(),
+            Loaded::Message { ref chat } => {
+                if self.msg.param.get_cmd() == SystemMessage::AutocryptSetupMessage {
+                    self.context
+                        .stock_str(StockMessage::AcSetupMsgSubject)
+                        .into_owned()
+                } else if chat.typ == Chattype::Group || chat.typ == Chattype::VerifiedGroup {
+                    let re = if self.in_reply_to.is_empty() {
+                        ""
+                    } else {
+                        "Re: "
+                    };
+                    format!("{}{}", re, chat.name)
+                } else {
+                    let raw = message::get_summarytext_by_raw(
+                        self.msg.viewtype,
+                        self.msg.text.as_ref(),
+                        &self.msg.param,
+                        32,
+                        self.context,
+                    );
+                    let raw_subject = raw.lines().next().unwrap_or_default();
+                    format!("Chat: {}", raw_subject)
                 }
             }
-            Loaded::MDN => {
-                let e = self.context.stock_str(StockMessage::ReadRcpt);
-                format!("Chat: {}", e)
-            }
+            Loaded::MDN { .. } => self.context.stock_str(StockMessage::ReadRcpt).into_owned(),
         }
     }
 
@@ -405,10 +357,8 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
             self.from_addr.clone(),
         );
 
-        let mut to = Vec::with_capacity(self.recipients_names.len());
-        let name_iter = self.recipients_names.iter();
-        let addr_iter = self.recipients_addr.iter();
-        for (name, addr) in name_iter.zip(addr_iter) {
+        let mut to = Vec::with_capacity(self.recipients.len());
+        for (name, addr) in self.recipients.iter() {
             if name.is_empty() {
                 to.push(Address::new_mailbox(addr.clone()));
             } else {
@@ -465,19 +415,19 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
         let grpimage = self.grpimage();
         let force_plaintext = self.should_force_plaintext();
         let subject_str = self.subject_str();
-        let e2ee_guranteed = self.is_e2ee_guranteed();
+        let e2ee_guaranteed = self.is_e2ee_guaranteed();
         let mut encrypt_helper = EncryptHelper::new(self.context)?;
 
         let subject = encode_words(&subject_str);
 
         let mut message = match self.loaded {
-            Loaded::Message => {
+            Loaded::Message { .. } => {
                 self.render_message(&mut protected_headers, &mut unprotected_headers, &grpimage)?
             }
-            Loaded::MDN => self.render_mdn()?,
+            Loaded::MDN { .. } => self.render_mdn()?,
         };
 
-        if force_plaintext != DC_FP_NO_AUTOCRYPT_HEADER {
+        if force_plaintext != ForcePlaintext::NoAutocryptHeader as i32 {
             // unless determined otherwise we add the Autocrypt header
             let aheader = encrypt_helper.get_aheader().to_string();
             unprotected_headers.push(Header::new("Autocrypt".into(), aheader));
@@ -487,12 +437,12 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
 
         let peerstates = self.peerstates_for_recipients()?;
         let should_encrypt =
-            encrypt_helper.should_encrypt(self.context, e2ee_guranteed, &peerstates)?;
+            encrypt_helper.should_encrypt(self.context, e2ee_guaranteed, &peerstates)?;
         let is_encrypted = should_encrypt && force_plaintext == 0;
 
         let rfc724_mid = match self.loaded {
-            Loaded::Message => self.msg.rfc724_mid.clone(),
-            Loaded::MDN => dc_create_outgoing_rfc724_mid(None, &self.from_addr),
+            Loaded::Message { .. } => self.msg.rfc724_mid.clone(),
+            Loaded::MDN { .. } => dc_create_outgoing_rfc724_mid(None, &self.from_addr),
         };
 
         // we could also store the message-id in the protected headers
@@ -601,11 +551,9 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
         };
 
         let MimeFactory {
-            recipients_addr,
+            recipients,
             from_addr,
             last_added_location_id,
-            msg,
-            loaded,
             ..
         } = self;
 
@@ -615,11 +563,7 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
             is_encrypted,
             is_gossiped,
             last_added_location_id,
-            foreign_id: match loaded {
-                Loaded::Message => Some(msg.id),
-                Loaded::MDN => None,
-            },
-            recipients: recipients_addr,
+            recipients: recipients.into_iter().map(|(_, addr)| addr).collect(),
             from: from_addr,
             rfc724_mid,
         })
@@ -632,7 +576,10 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
         grpimage: &Option<String>,
     ) -> Result<PartBuilder, Error> {
         let context = self.context;
-        let chat = self.chat.as_ref().unwrap();
+        let chat = match &self.loaded {
+            Loaded::Message { chat } => chat,
+            Loaded::MDN { .. } => bail!("Attempt to render MDN as a message"),
+        };
         let command = self.msg.param.get_cmd();
         let mut placeholdertext = None;
         let mut meta_part = None;
@@ -761,7 +708,7 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
         if let Some(grpimage) = grpimage {
             info!(self.context, "setting group image '{}'", grpimage);
             let mut meta = Message::default();
-            meta.type_0 = Viewtype::Image;
+            meta.viewtype = Viewtype::Image;
             meta.param.set(Param::File, grpimage);
 
             let (mail, filename_as_sent) = build_body_file(context, &meta, "group-image")?;
@@ -780,15 +727,15 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
             }
         }
 
-        if self.msg.type_0 == Viewtype::Sticker {
+        if self.msg.viewtype == Viewtype::Sticker {
             protected_headers.push(Header::new("Chat-Content".into(), "sticker".into()));
         }
 
-        if self.msg.type_0 == Viewtype::Voice
-            || self.msg.type_0 == Viewtype::Audio
-            || self.msg.type_0 == Viewtype::Video
+        if self.msg.viewtype == Viewtype::Voice
+            || self.msg.viewtype == Viewtype::Audio
+            || self.msg.viewtype == Viewtype::Video
         {
-            if self.msg.type_0 == Viewtype::Voice {
+            if self.msg.viewtype == Viewtype::Voice {
                 protected_headers.push(Header::new("Chat-Voice-Message".into(), "1".into()));
             }
             let duration_ms = self.msg.param.get_int(Param::Duration).unwrap_or_default();
@@ -844,7 +791,7 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
             .body(message_text)];
 
         // add attachment part
-        if chat::msgtype_has_file(self.msg.type_0) {
+        if chat::msgtype_has_file(self.msg.viewtype) {
             if !is_file_size_okay(context, &self.msg) {
                 bail!(
                     "Message exceeds the recommended {} MB.",
@@ -894,7 +841,7 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
                             )
                             .header((
                                 "Content-Disposition",
-                                "attachment; filename=\"message.kml\"",
+                                "attachment; filename=\"location.kml\"",
                             ))
                             .body(kml_content),
                     );
@@ -939,7 +886,7 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
     /// Render an MDN
     fn render_mdn(&mut self) -> Result<PartBuilder, Error> {
         // RFC 6522, this also requires the `report-type` parameter which is equal
-        // to the MIME subtype of the second body part of the multipart/report */
+        // to the MIME subtype of the second body part of the multipart/report
         //
         // currently, we do not send MDNs encrypted:
         // - in a multi-device-setup that is not set up properly, MDNs would disturb the communication as they
@@ -950,6 +897,13 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
         //   are forwarded for any reasons (eg. gmail always forwards to IMAP), we have no chance to decrypt them;
         //   this issue is fixed with 0.9.4
 
+        let additional_msg_ids = match &self.loaded {
+            Loaded::Message { .. } => bail!("Attempt to render a message as MDN"),
+            Loaded::MDN {
+                additional_msg_ids, ..
+            } => additional_msg_ids,
+        };
+
         let mut message = PartBuilder::new().header((
             "Content-Type".to_string(),
             "multipart/report; report-type=disposition-notification".to_string(),
@@ -991,10 +945,22 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
             version, self.from_addr, self.from_addr, self.msg.rfc724_mid
         );
 
+        let extension_fields = if additional_msg_ids.is_empty() {
+            "".to_string()
+        } else {
+            "X-Additional-Message-IDs: ".to_string()
+                + &additional_msg_ids
+                    .iter()
+                    .map(|mid| render_rfc724_mid(&mid))
+                    .collect::<Vec<String>>()
+                    .join(" ")
+                + "\r\n"
+        };
+
         message = message.child(
             PartBuilder::new()
                 .content_type(&"message/disposition-notification".parse().unwrap())
-                .body(message_text2)
+                .body(message_text2 + &extension_fields)
                 .build(),
         );
 
@@ -1002,6 +968,20 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
     }
 }
 
+/// Returns base64-encoded buffer `buf` split into 78-bytes long
+/// chunks separated by CRLF.
+///
+/// This line length limit is an
+/// [RFC5322 requirement](https://tools.ietf.org/html/rfc5322#section-2.1.1).
+fn wrapped_base64_encode(buf: &[u8]) -> String {
+    let base64 = base64::encode(&buf);
+    let mut chars = base64.chars();
+    std::iter::repeat_with(|| chars.by_ref().take(78).collect::<String>())
+        .take_while(|s| !s.is_empty())
+        .collect::<Vec<_>>()
+        .join("\r\n")
+}
+
 fn build_body_file(
     context: &Context,
     msg: &Message,
@@ -1017,7 +997,7 @@ fn build_body_file(
     // not transfer the original filenames eg. for images; these names
     // are normally not needed and contain timestamps, running numbers
     // etc.
-    let filename_to_send: String = match msg.type_0 {
+    let filename_to_send: String = match msg.viewtype {
         Viewtype::Voice => chrono::Utc
             .timestamp(msg.timestamp_sort as i64, 0)
             .format(&format!("voice-message_%Y-%m-%d_%H-%M-%S.{}", &suffix))
@@ -1062,7 +1042,7 @@ fn build_body_file(
     };
 
     let body = std::fs::read(blob.to_abs_path())?;
-    let encoded_body = base64::encode(&body);
+    let encoded_body = wrapped_base64_encode(&body);
 
     let mail = PartBuilder::new()
         .content_type(&mimetype)
@@ -1084,7 +1064,7 @@ fn build_selfavatar_file(context: &Context, path: String) -> Result<(PartBuilder
         None => mime::APPLICATION_OCTET_STREAM,
     };
     let body = std::fs::read(blob.to_abs_path())?;
-    let encoded_body = base64::encode(&body);
+    let encoded_body = wrapped_base64_encode(&body);
 
     let part = PartBuilder::new()
         .content_type(&mimetype)
@@ -1098,14 +1078,11 @@ fn build_selfavatar_file(context: &Context, path: String) -> Result<(PartBuilder
     Ok((part, filename_to_send))
 }
 
-pub(crate) fn vec_contains_lowercase(vec: &[String], part: &str) -> bool {
-    let partlc = part.to_lowercase();
-    for cur in vec.iter() {
-        if cur.to_lowercase() == partlc {
-            return true;
-        }
-    }
-    false
+fn recipients_contain_addr(recipients: &[(String, String)], addr: &str) -> bool {
+    let addr_lc = addr.to_lowercase();
+    recipients
+        .iter()
+        .any(|(_, cur)| cur.to_lowercase() == addr_lc)
 }
 
 fn is_file_size_okay(context: &Context, msg: &Message) -> bool {
@@ -1146,14 +1123,8 @@ fn encode_words(word: &str) -> String {
 }
 
 pub fn needs_encoding(to_check: impl AsRef<str>) -> bool {
-    let to_check = to_check.as_ref();
-
-    if to_check.is_empty() {
-        return false;
-    }
-
-    to_check.chars().any(|c| {
-        !c.is_ascii_alphanumeric() && c != '-' && c != '_' && c != '.' && c != '~' && c != '%'
+    !to_check.as_ref().chars().all(|c| {
+        c.is_ascii_alphanumeric() || c == '-' || c == '_' || c == '.' || c == '~' || c == '%'
     })
 }
 
@@ -1203,4 +1174,21 @@ mod tests {
             "<123@q> <456@d>".to_string()
         );
     }
+
+    #[test]
+    fn test_wrapped_base64_encode() {
+        let input = b"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA";
+        let output =
+            "QUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQU\r\n\
+             FBQUFBQUFBQQ==";
+        assert_eq!(wrapped_base64_encode(input), output);
+    }
+
+    #[test]
+    fn test_needs_encoding() {
+        assert!(!needs_encoding(""));
+        assert!(!needs_encoding("foobar"));
+        assert!(needs_encoding(" "));
+        assert!(needs_encoding("foo bar"));
+    }
 }

src/mimeparser.rs

@@ -2,7 +2,7 @@ use std::collections::{HashMap, HashSet};
 
 use deltachat_derive::{FromSql, ToSql};
 use lettre_email::mime::{self, Mime};
-use mailparse::{DispositionType, MailHeaderMap};
+use mailparse::{DispositionType, MailAddr, MailHeaderMap};
 
 use crate::aheader::Aheader;
 use crate::blob::BlobObject;
@@ -10,23 +10,33 @@ use crate::config::Config;
 use crate::constants::Viewtype;
 use crate::contact::*;
 use crate::context::Context;
-use crate::dc_simplify::*;
 use crate::dc_tools::*;
+use crate::dehtml::dehtml;
 use crate::e2ee;
 use crate::error::Result;
+use crate::events::Event;
 use crate::headerdef::HeaderDef;
 use crate::job::{job_add, Action};
 use crate::location;
 use crate::message;
-use crate::message::MsgId;
 use crate::param::*;
 use crate::peerstate::Peerstate;
 use crate::securejoin::handle_degrade_event;
+use crate::simplify::*;
 use crate::stock::StockMessage;
 use crate::{bail, ensure};
 
+/// A parsed MIME message.
+///
+/// This represents the relevant information of a parsed MIME message
+/// for deltachat.  The original MIME message might have had more
+/// information but this representation should contain everything
+/// needed for deltachat's purposes.
+///
+/// It is created by parsing the raw data of an actual MIME message
+/// using the [MimeMessage::from_bytes] constructor.
 #[derive(Debug)]
-pub struct MimeParser<'a> {
+pub struct MimeMessage<'a> {
     pub context: &'a Context,
     pub parts: Vec<Part>,
     header: HashMap<String, String>,
@@ -39,9 +49,7 @@ pub struct MimeParser<'a> {
     pub message_kml: Option<location::Kml>,
     pub user_avatar: AvatarAction,
     pub group_avatar: AvatarAction,
-    reports: Vec<Report>,
-    mdns_enabled: bool,
-    parsed_protected_headers: bool,
+    pub(crate) reports: Vec<Report>,
 }
 
 #[derive(Debug, PartialEq)]
@@ -83,12 +91,11 @@ impl Default for SystemMessage {
 
 const MIME_AC_SETUP_FILE: &str = "application/autocrypt-setup";
 
-impl<'a> MimeParser<'a> {
+impl<'a> MimeMessage<'a> {
     pub fn from_bytes(context: &'a Context, body: &[u8]) -> Result<Self> {
         let mail = mailparse::parse_mail(body)?;
-        let mdns_enabled = context.get_config_bool(Config::MdnsEnabled);
 
-        let mut parser = MimeParser {
+        let mut parser = MimeMessage {
             parts: Vec::new(),
             header: Default::default(),
             decrypting_failed: false,
@@ -104,8 +111,6 @@ impl<'a> MimeParser<'a> {
             message_kml: None,
             user_avatar: AvatarAction::None,
             group_avatar: AvatarAction::None,
-            mdns_enabled,
-            parsed_protected_headers: false,
         };
 
         let message_time = mail
@@ -211,7 +216,6 @@ impl<'a> MimeParser<'a> {
                         || filepart.typ == Viewtype::Voice
                         || filepart.typ == Viewtype::Video
                         || filepart.typ == Viewtype::File)
-                    && !filepart.is_meta
             };
 
             if need_drop {
@@ -228,7 +232,7 @@ impl<'a> MimeParser<'a> {
             }
         }
         if let Some(ref subject) = self.get_subject() {
-            let mut prepend_subject = 1i32;
+            let mut prepend_subject = true;
             if !self.decrypting_failed {
                 let colon = subject.find(':');
                 if colon == Some(2)
@@ -236,10 +240,10 @@ impl<'a> MimeParser<'a> {
                     || self.has_chat_version()
                     || subject.contains("Chat:")
                 {
-                    prepend_subject = 0i32
+                    prepend_subject = false
                 }
             }
-            if 0 != prepend_subject {
+            if prepend_subject {
                 let subj = if let Some(n) = subject.find('[') {
                     &subject[0..n]
                 } else {
@@ -291,30 +295,27 @@ impl<'a> MimeParser<'a> {
                 }
             }
         }
-        if !self.decrypting_failed {
-            if let Some(dn_field) = self.get(HeaderDef::ChatDispositionNotificationTo) {
-                if self.get_last_nonmeta().is_some() {
-                    let addrs = mailparse::addrparse(&dn_field).unwrap();
 
-                    if let Some(dn_to_addr) = addrs.first() {
-                        if let Some(from_field) = self.get(HeaderDef::From_) {
-                            let from_addrs = mailparse::addrparse(&from_field).unwrap();
-
-                            if let Some(from_addr) = from_addrs.first() {
-                                if compare_addrs(from_addr, dn_to_addr) {
-                                    if let Some(part_4) = self.get_last_nonmeta_mut() {
-                                        part_4.param.set_int(Param::WantsMdn, 1);
-                                    }
-                                }
-                            }
+        // See if an MDN is requested from the other side
+        if !self.decrypting_failed && !self.parts.is_empty() {
+            if let Some(ref dn_to_addr) =
+                self.parse_first_addr(HeaderDef::ChatDispositionNotificationTo)
+            {
+                if let Some(ref from_addr) = self.parse_first_addr(HeaderDef::From_) {
+                    if compare_addrs(from_addr, dn_to_addr) {
+                        if let Some(part) = self.parts.last_mut() {
+                            part.param.set_int(Param::WantsMdn, 1);
                         }
                     }
                 }
             }
         }
 
-        // Cleanup - and try to create at least an empty part if there are no parts yet
-        if self.get_last_nonmeta().is_none() && self.reports.is_empty() {
+        // If there were no parts, especially a non-DC mail user may
+        // just have send a message in the subject with an empty body.
+        // Besides, we want to show something in case our incoming-processing
+        // failed to properly handle an incoming message.
+        if self.parts.is_empty() && self.reports.is_empty() {
             let mut part = Part::default();
             part.typ = Viewtype::Text;
 
@@ -353,14 +354,6 @@ impl<'a> MimeParser<'a> {
         AvatarAction::None
     }
 
-    pub fn get_last_nonmeta(&self) -> Option<&Part> {
-        self.parts.iter().rev().find(|part| !part.is_meta)
-    }
-
-    pub fn get_last_nonmeta_mut(&mut self) -> Option<&mut Part> {
-        self.parts.iter_mut().rev().find(|part| !part.is_meta)
-    }
-
     pub fn was_encrypted(&self) -> bool {
         !self.signatures.is_empty()
     }
@@ -374,20 +367,29 @@ impl<'a> MimeParser<'a> {
     }
 
     pub(crate) fn get_subject(&self) -> Option<String> {
-        if let Some(s) = self.get(HeaderDef::Subject) {
-            if s.is_empty() {
-                return None;
-            }
-            Some(s.to_string())
-        } else {
-            None
-        }
+        self.get(HeaderDef::Subject)
+            .filter(|s| !s.is_empty())
+            .map(|s| s.to_string())
     }
 
     pub fn get(&self, headerdef: HeaderDef) -> Option<&String> {
         self.header.get(&headerdef.get_headername())
     }
 
+    fn parse_first_addr(&self, headerdef: HeaderDef) -> Option<MailAddr> {
+        if let Some(value) = self.get(headerdef.clone()) {
+            match mailparse::addrparse(&value) {
+                Ok(ref addrs) => {
+                    return addrs.first().cloned();
+                }
+                Err(err) => {
+                    warn!(self.context, "header {} parse error: {:?}", headerdef, err);
+                }
+            }
+        }
+        None
+    }
+
     fn parse_mime_recursive(&mut self, mail: &mailparse::ParsedMail<'_>) -> Result<bool> {
         if mail.ctype.params.get("protected-headers").is_some() {
             if mail.ctype.mimetype == "text/rfc822-headers" {
@@ -577,12 +579,16 @@ impl<'a> MimeParser<'a> {
                         }
                     };
 
-                    let mut simplifier = Simplify::new();
-                    let simplified_txt = if decoded_data.is_empty() {
-                        "".into()
+                    let (simplified_txt, is_forwarded) = if decoded_data.is_empty() {
+                        ("".into(), false)
                     } else {
                         let is_html = mime_type == mime::TEXT_HTML;
-                        simplifier.simplify(&decoded_data, is_html, self.has_chat_version())
+                        let out = if is_html {
+                            dehtml(&decoded_data)
+                        } else {
+                            decoded_data.clone()
+                        };
+                        simplify(out, self.has_chat_version())
                     };
 
                     if !simplified_txt.is_empty() {
@@ -594,7 +600,7 @@ impl<'a> MimeParser<'a> {
                         self.do_add_single_part(part);
                     }
 
-                    if simplifier.is_forwarded {
+                    if is_forwarded {
                         self.is_forwarded = true;
                     }
                 }
@@ -702,11 +708,8 @@ impl<'a> MimeParser<'a> {
     }
 
     pub fn get_rfc724_mid(&self) -> Option<String> {
-        if let Some(msgid) = self.get(HeaderDef::MessageId) {
-            parse_message_id(msgid)
-        } else {
-            None
-        }
+        self.get(HeaderDef::MessageId)
+            .and_then(|msgid| parse_message_id(msgid))
     }
 
     fn merge_headers(&mut self, fields: &[mailparse::MailHeader<'_>]) {
@@ -726,11 +729,6 @@ impl<'a> MimeParser<'a> {
     }
 
     fn process_report(&self, report: &mailparse::ParsedMail<'_>) -> Result<Option<Report>> {
-        // to get a clear functionality, do not show incoming MDNs if the options is disabled
-        if !self.mdns_enabled {
-            return Ok(None);
-        }
-
         // parse as mailheaders
         let report_body = report.subparts[1].get_body_raw()?;
         let (report_fields, _) = mailparse::parse_headers(&report_body)?;
@@ -744,47 +742,67 @@ impl<'a> MimeParser<'a> {
                 .flatten()
                 .and_then(|v| parse_message_id(&v))
             {
+                let additional_message_ids = report_fields
+                    .get_first_value(&HeaderDef::XAdditionalMessageIds.get_headername())
+                    .ok()
+                    .flatten()
+                    .map_or_else(Vec::new, |v| {
+                        v.split(' ').filter_map(parse_message_id).collect()
+                    });
+
                 return Ok(Some(Report {
                     original_message_id,
+                    additional_message_ids,
                 }));
             }
         }
+        warn!(
+            self.context,
+            "ignoring unknown disposition-notification, Message-Id: {:?}",
+            report_fields.get_first_value("Message-ID").ok()
+        );
 
         Ok(None)
     }
 
-    // Handle reports (mainly MDNs)
+    /// Handle reports (only MDNs for now)
     pub fn handle_reports(
         &self,
         from_id: u32,
         sent_timestamp: i64,
-        rr_event_to_send: &mut Vec<(u32, MsgId)>,
         server_folder: impl AsRef<str>,
         server_uid: u32,
     ) {
+        if self.reports.is_empty() {
+            return;
+        }
+
+        let mut mdn_recognized = false;
         for report in &self.reports {
-            let mut mdn_consumed = false;
-
-            if let Some((chat_id, msg_id)) = message::mdn_from_ext(
-                self.context,
-                from_id,
-                &report.original_message_id,
-                sent_timestamp,
-            ) {
-                rr_event_to_send.push((chat_id, msg_id));
-                mdn_consumed = true;
-            }
-
-            if self.has_chat_version() || mdn_consumed {
-                let mut param = Params::new();
-                param.set(Param::ServerFolder, server_folder.as_ref());
-                param.set_int(Param::ServerUid, server_uid as i32);
-                if self.has_chat_version() && self.context.get_config_bool(Config::MvboxMove) {
-                    param.set_int(Param::AlsoMove, 1);
+            for original_message_id in
+                std::iter::once(&report.original_message_id).chain(&report.additional_message_ids)
+            {
+                if let Some((chat_id, msg_id)) = message::mdn_from_ext(
+                    self.context,
+                    from_id,
+                    original_message_id,
+                    sent_timestamp,
+                ) {
+                    self.context.call_cb(Event::MsgRead { chat_id, msg_id });
+                    mdn_recognized = true;
                 }
-                job_add(self.context, Action::MarkseenMdnOnImap, 0, param, 0);
             }
         }
+
+        if self.has_chat_version() || mdn_recognized {
+            let mut param = Params::new();
+            param.set(Param::ServerFolder, server_folder.as_ref());
+            param.set_int(Param::ServerUid, server_uid as i32);
+            if self.has_chat_version() && self.context.get_config_bool(Config::MvboxMove) {
+                param.set_int(Param::AlsoMove, 1);
+            }
+            job_add(self.context, Action::MarkseenMdnOnImap, 0, param, 0);
+        }
     }
 }
 
@@ -813,7 +831,11 @@ fn update_gossip_peerstates(
                 })));
             }
 
-            if recipients.as_ref().unwrap().contains(&header.addr) {
+            if recipients
+                .as_ref()
+                .unwrap()
+                .contains(&header.addr.to_lowercase())
+            {
                 let mut peerstate = Peerstate::from_addr(context, &context.sql, &header.addr);
                 if let Some(ref mut peerstate) = peerstate {
                     peerstate.apply_gossip(header, message_time);
@@ -843,8 +865,11 @@ fn update_gossip_peerstates(
 }
 
 #[derive(Debug)]
-struct Report {
+pub(crate) struct Report {
+    /// Original-Message-ID header
     original_message_id: String,
+    /// X-Additional-Message-IDs
+    additional_message_ids: Vec<String>,
 }
 
 fn parse_message_id(field: &str) -> Option<String> {
@@ -868,7 +893,6 @@ fn is_known(key: &str) -> bool {
 #[derive(Debug, Default, Clone)]
 pub struct Part {
     pub typ: Viewtype,
-    pub is_meta: bool,
     pub mimetype: Option<Mime>,
     pub msg: String,
     pub msg_raw: Option<String>,
@@ -970,7 +994,7 @@ fn get_attachment_filename(mail: &mailparse::ParsedMail) -> Result<String> {
     Ok(desired_filename)
 }
 
-// returned addresses are normalized.
+// returned addresses are normalized and lowercased.
 fn get_recipients<S: AsRef<str>, T: Iterator<Item = (S, S)>>(headers: T) -> HashSet<String> {
     let mut recipients: HashSet<String> = Default::default();
 
@@ -982,11 +1006,11 @@ fn get_recipients<S: AsRef<str>, T: Iterator<Item = (S, S)>>(headers: T) -> Hash
                 for addr in addrs.iter() {
                     match addr {
                         mailparse::MailAddr::Single(ref info) => {
-                            recipients.insert(addr_normalize(&info.addr).into());
+                            recipients.insert(addr_normalize(&info.addr).to_lowercase());
                         }
                         mailparse::MailAddr::Group(ref infos) => {
                             for info in &infos.addrs {
-                                recipients.insert(addr_normalize(&info.addr).into());
+                                recipients.insert(addr_normalize(&info.addr).to_lowercase());
                             }
                         }
                     }
@@ -1026,7 +1050,7 @@ mod tests {
     fn test_dc_mimeparser_crash() {
         let context = dummy_context();
         let raw = include_bytes!("../test-data/message/issue_523.txt");
-        let mimeparser = MimeParser::from_bytes(&context.ctx, &raw[..]).unwrap();
+        let mimeparser = MimeMessage::from_bytes(&context.ctx, &raw[..]).unwrap();
 
         assert_eq!(mimeparser.get_subject(), None);
         assert_eq!(mimeparser.parts.len(), 1);
@@ -1039,7 +1063,7 @@ mod tests {
             let context = dummy_context();
 
             // just don't crash
-            let _ = MimeParser::from_bytes(&context.ctx, data.as_bytes());
+            let _ = MimeMessage::from_bytes(&context.ctx, data.as_bytes());
         }
     }
 
@@ -1047,7 +1071,7 @@ mod tests {
     fn test_get_rfc724_mid_exists() {
         let context = dummy_context();
         let raw = include_bytes!("../test-data/message/mail_with_message_id.txt");
-        let mimeparser = MimeParser::from_bytes(&context.ctx, &raw[..]).unwrap();
+        let mimeparser = MimeMessage::from_bytes(&context.ctx, &raw[..]).unwrap();
 
         assert_eq!(
             mimeparser.get_rfc724_mid(),
@@ -1059,7 +1083,7 @@ mod tests {
     fn test_get_rfc724_mid_not_exists() {
         let context = dummy_context();
         let raw = include_bytes!("../test-data/message/issue_523.txt");
-        let mimeparser = MimeParser::from_bytes(&context.ctx, &raw[..]).unwrap();
+        let mimeparser = MimeMessage::from_bytes(&context.ctx, &raw[..]).unwrap();
         assert_eq!(mimeparser.get_rfc724_mid(), None);
     }
 
@@ -1067,7 +1091,7 @@ mod tests {
     fn test_get_recipients() {
         let context = dummy_context();
         let raw = include_bytes!("../test-data/message/mail_with_cc.txt");
-        let mimeparser = MimeParser::from_bytes(&context.ctx, &raw[..]).unwrap();
+        let mimeparser = MimeMessage::from_bytes(&context.ctx, &raw[..]).unwrap();
         let recipients = get_recipients(mimeparser.header.iter());
         assert!(recipients.contains("abc@bcd.com"));
         assert!(recipients.contains("def@def.de"));
@@ -1110,6 +1134,26 @@ mod tests {
         );
     }
 
+    #[test]
+    fn test_parse_first_addr() {
+        let context = dummy_context();
+        let raw = b"From: hello@one.org, world@two.org\n\
+                    Chat-Disposition-Notification-To: wrong\n\
+                    Content-Type: text/plain\n\
+                    Chat-Version: 1.0\n\
+                    \n\
+                    test1\n\
+                    ";
+
+        let mimeparser = MimeMessage::from_bytes(&context.ctx, &raw[..]).unwrap();
+
+        let of = mimeparser.parse_first_addr(HeaderDef::From_).unwrap();
+        assert_eq!(of, mailparse::addrparse("hello@one.org").unwrap()[0]);
+
+        let of = mimeparser.parse_first_addr(HeaderDef::ChatDispositionNotificationTo);
+        assert!(of.is_none());
+    }
+
     #[test]
     fn test_mimeparser_with_context() {
         let context = dummy_context();
@@ -1129,10 +1173,9 @@ mod tests {
                     test1\n\
                     \n\
                     --==break==--\n\
-                    \n\
-                    \x00";
+                    \n";
 
-        let mimeparser = MimeParser::from_bytes(&context.ctx, &raw[..]).unwrap();
+        let mimeparser = MimeMessage::from_bytes(&context.ctx, &raw[..]).unwrap();
 
         // non-overwritten headers do not bubble up
         let of = mimeparser.get(HeaderDef::SecureJoinGroup).unwrap();
@@ -1157,26 +1200,26 @@ mod tests {
         let t = dummy_context();
 
         let raw = include_bytes!("../test-data/message/mail_attach_txt.eml");
-        let mimeparser = MimeParser::from_bytes(&t.ctx, &raw[..]).unwrap();
+        let mimeparser = MimeMessage::from_bytes(&t.ctx, &raw[..]).unwrap();
         assert_eq!(mimeparser.user_avatar, AvatarAction::None);
         assert_eq!(mimeparser.group_avatar, AvatarAction::None);
 
         let raw = include_bytes!("../test-data/message/mail_with_user_avatar.eml");
-        let mimeparser = MimeParser::from_bytes(&t.ctx, &raw[..]).unwrap();
+        let mimeparser = MimeMessage::from_bytes(&t.ctx, &raw[..]).unwrap();
         assert_eq!(mimeparser.parts.len(), 1);
         assert_eq!(mimeparser.parts[0].typ, Viewtype::Text);
         assert!(mimeparser.user_avatar.is_change());
         assert_eq!(mimeparser.group_avatar, AvatarAction::None);
 
         let raw = include_bytes!("../test-data/message/mail_with_user_avatar_deleted.eml");
-        let mimeparser = MimeParser::from_bytes(&t.ctx, &raw[..]).unwrap();
+        let mimeparser = MimeMessage::from_bytes(&t.ctx, &raw[..]).unwrap();
         assert_eq!(mimeparser.parts.len(), 1);
         assert_eq!(mimeparser.parts[0].typ, Viewtype::Text);
         assert_eq!(mimeparser.user_avatar, AvatarAction::Delete);
         assert_eq!(mimeparser.group_avatar, AvatarAction::None);
 
         let raw = include_bytes!("../test-data/message/mail_with_user_and_group_avatars.eml");
-        let mimeparser = MimeParser::from_bytes(&t.ctx, &raw[..]).unwrap();
+        let mimeparser = MimeMessage::from_bytes(&t.ctx, &raw[..]).unwrap();
         assert_eq!(mimeparser.parts.len(), 1);
         assert_eq!(mimeparser.parts[0].typ, Viewtype::Text);
         assert!(mimeparser.user_avatar.is_change());
@@ -1186,10 +1229,225 @@ mod tests {
         let raw = include_bytes!("../test-data/message/mail_with_user_and_group_avatars.eml");
         let raw = String::from_utf8_lossy(raw).to_string();
         let raw = raw.replace("Chat-User-Avatar:", "Xhat-Xser-Xvatar:");
-        let mimeparser = MimeParser::from_bytes(&t.ctx, raw.as_bytes()).unwrap();
+        let mimeparser = MimeMessage::from_bytes(&t.ctx, raw.as_bytes()).unwrap();
         assert_eq!(mimeparser.parts.len(), 1);
         assert_eq!(mimeparser.parts[0].typ, Viewtype::Image);
         assert_eq!(mimeparser.user_avatar, AvatarAction::None);
         assert!(mimeparser.group_avatar.is_change());
     }
+
+    #[test]
+    fn test_mimeparser_message_kml() {
+        let context = dummy_context();
+        let raw = b"Chat-Version: 1.0\n\
+From: foo <foo@example.org>\n\
+To: bar <bar@example.org>\n\
+Subject: Location streaming\n\
+Content-Type: multipart/mixed; boundary=\"==break==\"\n\
+\n\
+\n\
+--==break==\n\
+Content-Type: text/plain; charset=utf-8\n\
+\n\
+--\n\
+Sent with my Delta Chat Messenger: https://delta.chat\n\
+\n\
+--==break==\n\
+Content-Type: application/vnd.google-earth.kml+xml\n\
+Content-Disposition: attachment; filename=\"message.kml\"\n\
+\n\
+<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n\
+<kml xmlns=\"http://www.opengis.net/kml/2.2\">\n\
+<Document addr=\"foo@example.org\">\n\
+<Placemark><Timestamp><when>XXX</when></Timestamp><Point><coordinates accuracy=\"48\">0.0,0.0</coordinates></Point></Placemark>\n\
+</Document>\n\
+</kml>\n\
+\n\
+--==break==--\n\
+;";
+
+        let mimeparser = MimeMessage::from_bytes(&context.ctx, &raw[..]).unwrap();
+        assert_eq!(
+            mimeparser.get_subject(),
+            Some("Location streaming".to_string())
+        );
+        assert!(mimeparser.location_kml.is_none());
+        assert!(mimeparser.message_kml.is_some());
+
+        // There is only one part because message.kml attachment is special
+        // and only goes into message_kml.
+        assert_eq!(mimeparser.parts.len(), 1);
+    }
+
+    #[test]
+    fn test_parse_mdn() {
+        let context = dummy_context();
+        let raw = b"Subject: =?utf-8?q?Chat=3A_Message_opened?=\n\
+Date: Mon, 10 Jan 2020 00:00:00 +0000\n\
+Chat-Version: 1.0\n\
+Message-ID: <bar@example.org>\n\
+To: Alice <alice@example.org>\n\
+From: Bob <bob@example.org>\n\
+Content-Type: multipart/report; report-type=disposition-notification;\n\t\
+boundary=\"kJBbU58X1xeWNHgBtTbMk80M5qnV4N\"\n\
+\n\
+\n\
+--kJBbU58X1xeWNHgBtTbMk80M5qnV4N\n\
+Content-Type: text/plain; charset=utf-8\n\
+\n\
+The \"Encrypted message\" message you sent was displayed on the screen of the recipient.\n\
+\n\
+This is no guarantee the content was read.\n\
+\n\
+\n\
+--kJBbU58X1xeWNHgBtTbMk80M5qnV4N\n\
+Content-Type: message/disposition-notification\n\
+\n\
+Reporting-UA: Delta Chat 1.0.0-beta.22\n\
+Original-Recipient: rfc822;bob@example.org\n\
+Final-Recipient: rfc822;bob@example.org\n\
+Original-Message-ID: <foo@example.org>\n\
+Disposition: manual-action/MDN-sent-automatically; displayed\n\
+\n\
+\n\
+--kJBbU58X1xeWNHgBtTbMk80M5qnV4N--\n\
+";
+
+        let message = MimeMessage::from_bytes(&context.ctx, &raw[..]).unwrap();
+        assert_eq!(
+            message.get_subject(),
+            Some("Chat: Message opened".to_string())
+        );
+
+        assert_eq!(message.parts.len(), 0);
+        assert_eq!(message.reports.len(), 1);
+    }
+
+    /// Test parsing multiple MDNs combined in a single message.
+    ///
+    /// RFC 6522 specifically allows MDNs to be nested inside
+    /// multipart MIME messages.
+    #[test]
+    fn test_parse_multiple_mdns() {
+        let context = dummy_context();
+        let raw = b"Subject: =?utf-8?q?Chat=3A_Message_opened?=\n\
+Date: Mon, 10 Jan 2020 00:00:00 +0000\n\
+Chat-Version: 1.0\n\
+Message-ID: <foo@example.org>\n\
+To: Alice <alice@example.org>\n\
+From: Bob <bob@example.org>\n\
+Content-Type: multipart/parallel; boundary=outer\n\
+\n\
+This is a multipart MDN.\n\
+\n\
+--outer\n\
+Content-Type: multipart/report; report-type=disposition-notification;\n\t\
+boundary=kJBbU58X1xeWNHgBtTbMk80M5qnV4N\n\
+\n\
+\n\
+--kJBbU58X1xeWNHgBtTbMk80M5qnV4N\n\
+Content-Type: text/plain; charset=utf-8\n\
+\n\
+The \"Encrypted message\" message you sent was displayed on the screen of the recipient.\n\
+\n\
+This is no guarantee the content was read.\n\
+\n\
+\n\
+--kJBbU58X1xeWNHgBtTbMk80M5qnV4N\n\
+Content-Type: message/disposition-notification\n\
+\n\
+Reporting-UA: Delta Chat 1.0.0-beta.22\n\
+Original-Recipient: rfc822;bob@example.org\n\
+Final-Recipient: rfc822;bob@example.org\n\
+Original-Message-ID: <bar@example.org>\n\
+Disposition: manual-action/MDN-sent-automatically; displayed\n\
+\n\
+\n\
+--kJBbU58X1xeWNHgBtTbMk80M5qnV4N--\n\
+--outer\n\
+Content-Type: multipart/report; report-type=disposition-notification;\n\t\
+boundary=zuOJlsTfZAukyawEPVdIgqWjaM9w2W\n\
+\n\
+\n\
+--zuOJlsTfZAukyawEPVdIgqWjaM9w2W\n\
+Content-Type: text/plain; charset=utf-8\n\
+\n\
+The \"Encrypted message\" message you sent was displayed on the screen of the recipient.\n\
+\n\
+This is no guarantee the content was read.\n\
+\n\
+\n\
+--zuOJlsTfZAukyawEPVdIgqWjaM9w2W\n\
+Content-Type: message/disposition-notification\n\
+\n\
+Reporting-UA: Delta Chat 1.0.0-beta.22\n\
+Original-Recipient: rfc822;bob@example.org\n\
+Final-Recipient: rfc822;bob@example.org\n\
+Original-Message-ID: <baz@example.org>\n\
+Disposition: manual-action/MDN-sent-automatically; displayed\n\
+\n\
+\n\
+--zuOJlsTfZAukyawEPVdIgqWjaM9w2W--\n\
+--outer--\n\
+";
+
+        let message = MimeMessage::from_bytes(&context.ctx, &raw[..]).unwrap();
+        assert_eq!(
+            message.get_subject(),
+            Some("Chat: Message opened".to_string())
+        );
+
+        assert_eq!(message.parts.len(), 0);
+        assert_eq!(message.reports.len(), 2);
+    }
+
+    #[test]
+    fn test_parse_mdn_with_additional_message_ids() {
+        let context = dummy_context();
+        let raw = b"Subject: =?utf-8?q?Chat=3A_Message_opened?=\n\
+Date: Mon, 10 Jan 2020 00:00:00 +0000\n\
+Chat-Version: 1.0\n\
+Message-ID: <bar@example.org>\n\
+To: Alice <alice@example.org>\n\
+From: Bob <bob@example.org>\n\
+Content-Type: multipart/report; report-type=disposition-notification;\n\t\
+boundary=\"kJBbU58X1xeWNHgBtTbMk80M5qnV4N\"\n\
+\n\
+\n\
+--kJBbU58X1xeWNHgBtTbMk80M5qnV4N\n\
+Content-Type: text/plain; charset=utf-8\n\
+\n\
+The \"Encrypted message\" message you sent was displayed on the screen of the recipient.\n\
+\n\
+This is no guarantee the content was read.\n\
+\n\
+\n\
+--kJBbU58X1xeWNHgBtTbMk80M5qnV4N\n\
+Content-Type: message/disposition-notification\n\
+\n\
+Reporting-UA: Delta Chat 1.0.0-beta.22\n\
+Original-Recipient: rfc822;bob@example.org\n\
+Final-Recipient: rfc822;bob@example.org\n\
+Original-Message-ID: <foo@example.org>\n\
+Disposition: manual-action/MDN-sent-automatically; displayed\n\
+X-Additional-Message-IDs: <foo@example.com> <foo@example.net>\n\
+\n\
+\n\
+--kJBbU58X1xeWNHgBtTbMk80M5qnV4N--\n\
+";
+
+        let message = MimeMessage::from_bytes(&context.ctx, &raw[..]).unwrap();
+        assert_eq!(
+            message.get_subject(),
+            Some("Chat: Message opened".to_string())
+        );
+
+        assert_eq!(message.parts.len(), 0);
+        assert_eq!(message.reports.len(), 1);
+        assert_eq!(message.reports[0].original_message_id, "foo@example.org");
+        assert_eq!(
+            &message.reports[0].additional_message_ids,
+            &["foo@example.com", "foo@example.net"]
+        );
+    }
 }

src/oauth2.rs

@@ -154,7 +154,7 @@ pub fn dc_get_oauth2_access_token(
         }
 
         // ... and POST
-        let response = reqwest::Client::new()
+        let response = reqwest::blocking::Client::new()
             .post(post_url)
             .form(&post_param)
             .send();
@@ -165,7 +165,7 @@ pub fn dc_get_oauth2_access_token(
             );
             return None;
         }
-        let mut response = response.unwrap();
+        let response = response.unwrap();
         if !response.status().is_success() {
             warn!(
                 context,
@@ -271,7 +271,8 @@ impl Oauth2 {
         {
             match domain {
                 "gmail.com" | "googlemail.com" => Some(OAUTH2_GMAIL),
-                "yandex.com" | "yandex.ru" | "yandex.ua" => Some(OAUTH2_YANDEX),
+                "yandex.com" | "yandex.by" | "yandex.kz" | "yandex.ru" | "yandex.ua" | "ya.ru"
+                | "narod.ru" => Some(OAUTH2_YANDEX),
                 _ => None,
             }
         } else {
@@ -290,12 +291,12 @@ impl Oauth2 {
         //   "verified_email": true,
         //   "picture": "https://lh4.googleusercontent.com/-Gj5jh_9R0BY/AAAAAAAAAAI/AAAAAAAAAAA/IAjtjfjtjNA/photo.jpg"
         // }
-        let response = reqwest::Client::new().get(&userinfo_url).send();
+        let response = reqwest::blocking::Client::new().get(&userinfo_url).send();
         if response.is_err() {
             warn!(context, "Error getting userinfo: {:?}", response);
             return None;
         }
-        let mut response = response.unwrap();
+        let response = response.unwrap();
         if !response.status().is_success() {
             warn!(context, "Error getting userinfo: {:?}", response.status());
             return None;
@@ -311,13 +312,12 @@ impl Oauth2 {
         }
         if let Ok(response) = parsed {
             // serde_json::Value.as_str() removes the quotes of json-strings
-            let addr = response.get("email");
-            if addr.is_none() {
+            if let Some(addr) = response.get("email") {
+                Some(addr.to_string())
+            } else {
                 warn!(context, "E-mail missing in userinfo.");
-                return None;
+                None
             }
-            let addr = addr.unwrap().as_str();
-            addr.map(|addr| addr.to_string())
         } else {
             warn!(context, "Failed to parse userinfo.");
             None

src/param.rs

@@ -8,6 +8,7 @@ use num_traits::FromPrimitive;
 use crate::blob::{BlobError, BlobObject};
 use crate::context::Context;
 use crate::error;
+use crate::message::MsgId;
 use crate::mimeparser::SystemMessage;
 
 /// Available param keys.
@@ -16,36 +17,51 @@ use crate::mimeparser::SystemMessage;
 pub enum Param {
     /// For messages and jobs
     File = b'f',
+
     /// For Messages
     Width = b'w',
+
     /// For Messages
     Height = b'h',
+
     /// For Messages
     Duration = b'd',
+
     /// For Messages
     MimeType = b'm',
-    /// For Messages: message is encryoted, outgoing: guarantee E2EE or the message is not send
+
+    /// For Messages: message is encrypted, outgoing: guarantee E2EE or the message is not send
     GuaranteeE2ee = b'c',
+
     /// For Messages: decrypted with validation errors or without mutual set, if neither
     /// 'c' nor 'e' are preset, the messages is only transport encrypted.
     ErroneousE2ee = b'e',
+
     /// For Messages: force unencrypted message, either `ForcePlaintext::AddAutocryptHeader` (1),
     /// `ForcePlaintext::NoAutocryptHeader` (2) or 0.
     ForcePlaintext = b'u',
+
     /// For Messages
     WantsMdn = b'r',
+
     /// For Messages
     Forwarded = b'a',
+
     /// For Messages
     Cmd = b'S',
+
     /// For Messages
     Arg = b'E',
+
     /// For Messages
     Arg2 = b'F',
+
     /// For Messages
     Arg3 = b'G',
+
     /// For Messages
     Arg4 = b'H',
+
     /// For Messages
     Error = b'L',
 
@@ -62,32 +78,48 @@ pub enum Param {
     /// When the original message is then finally sent this parameter
     /// is used to also send all the forwarded messages.
     PrepForwards = b'P',
+
     /// For Jobs
     SetLatitude = b'l',
+
     /// For Jobs
     SetLongitude = b'n',
+
     /// For Jobs
     ServerFolder = b'Z',
+
     /// For Jobs
     ServerUid = b'z',
+
     /// For Jobs
     AlsoMove = b'M',
+
     /// For Jobs: space-separated list of message recipients
     Recipients = b'R',
-    // For Groups
+
+    /// For Groups
     Unpromoted = b'U',
-    // For Groups and Contacts
+
+    /// For Groups and Contacts
     ProfileImage = b'i',
-    // For Chats
+
+    /// For Chats
     Selftalk = b'K',
-    // For Chats
+
+    /// For Chats
     Devicetalk = b'D',
-    // For QR
+
+    /// For QR
     Auth = b's',
-    // For QR
+
+    /// For QR
     GroupId = b'x',
-    // For QR
+
+    /// For QR
     GroupName = b'g',
+
+    /// For MDN-sending job
+    MessageId = b'I',
 }
 
 /// Possible values for `Param::ForcePlaintext`.
@@ -284,6 +316,12 @@ impl Params {
         Ok(Some(path))
     }
 
+    pub fn get_msg_id(&self) -> Option<MsgId> {
+        self.get(Param::MessageId)
+            .and_then(|x| x.parse::<u32>().ok())
+            .map(MsgId::new)
+    }
+
     /// Set the given paramter to the passed in `i32`.
     pub fn set_int(&mut self, key: Param, value: i32) -> &mut Self {
         self.set(key, format!("{}", value));

src/peerstate.rs

@@ -5,7 +5,6 @@ use std::fmt;
 use num_traits::FromPrimitive;
 
 use crate::aheader::*;
-use crate::chat::*;
 use crate::constants::*;
 use crate::context::Context;
 use crate::key::*;
@@ -95,6 +94,7 @@ pub enum ToSave {
 pub enum DegradeEvent {
     /// Recoverable by an incoming encrypted mail.
     EncryptionPaused = 0x01,
+
     /// Recoverable by a new verify.
     FingerprintChanged = 0x02,
 }
@@ -417,7 +417,6 @@ impl<'a> Peerstate<'a> {
                     &self.addr,
                 ],
             )?;
-            reset_gossiped_timestamp(self.context, 0)?;
         } else if self.to_save == Some(ToSave::Timestamps) {
             sql::execute(
                 self.context,

src/pgp.rs

@@ -16,7 +16,7 @@ use pgp::types::{
 };
 use rand::{thread_rng, CryptoRng, Rng};
 
-use crate::error::Error;
+use crate::error::Result;
 use crate::key::*;
 use crate::keyring::*;
 
@@ -88,9 +88,7 @@ impl<'a> PublicKeyTrait for SignedPublicKeyOrSubkey<'a> {
 /// Split data from PGP Armored Data as defined in https://tools.ietf.org/html/rfc4880#section-6.2.
 ///
 /// Returns (type, headers, base64 encoded body).
-pub fn split_armored_data(
-    buf: &[u8],
-) -> Result<(BlockType, BTreeMap<String, String>, Vec<u8>), Error> {
+pub fn split_armored_data(buf: &[u8]) -> Result<(BlockType, BTreeMap<String, String>, Vec<u8>)> {
     use std::io::Read;
 
     let cursor = Cursor::new(buf);
@@ -194,7 +192,7 @@ pub fn pk_encrypt(
     plain: &[u8],
     public_keys_for_encryption: &Keyring,
     private_key_for_signing: Option<&Key>,
-) -> Result<String, Error> {
+) -> Result<String> {
     let lit_msg = Message::new_literal_bytes("", plain);
     let pkeys: Vec<SignedPublicKeyOrSubkey> = public_keys_for_encryption
         .keys()
@@ -236,7 +234,7 @@ pub fn pk_decrypt(
     private_keys_for_decryption: &Keyring,
     public_keys_for_validation: &Keyring,
     ret_signature_fingerprints: Option<&mut HashSet<String>>,
-) -> Result<Vec<u8>, Error> {
+) -> Result<Vec<u8>> {
     let (msg, _) = Message::from_armor_single(Cursor::new(ctext))?;
     let skeys: Vec<&SignedSecretKey> = private_keys_for_decryption
         .keys()
@@ -248,7 +246,7 @@ pub fn pk_decrypt(
         .collect();
 
     let (decryptor, _) = msg.decrypt(|| "".into(), || "".into(), &skeys[..])?;
-    let msgs = decryptor.collect::<Result<Vec<_>, _>>()?;
+    let msgs = decryptor.collect::<pgp::errors::Result<Vec<_>>>()?;
     ensure!(!msgs.is_empty(), "No valid messages found");
 
     let dec_msg = &msgs[0];
@@ -280,7 +278,7 @@ pub fn pk_decrypt(
 }
 
 /// Symmetric encryption.
-pub fn symm_encrypt(passphrase: &str, plain: &[u8]) -> Result<String, Error> {
+pub fn symm_encrypt(passphrase: &str, plain: &[u8]) -> Result<String> {
     let mut rng = thread_rng();
     let lit_msg = Message::new_literal_bytes("", plain);
 
@@ -297,11 +295,11 @@ pub fn symm_encrypt(passphrase: &str, plain: &[u8]) -> Result<String, Error> {
 pub fn symm_decrypt<T: std::io::Read + std::io::Seek>(
     passphrase: &str,
     ctext: T,
-) -> Result<Vec<u8>, Error> {
+) -> Result<Vec<u8>> {
     let (enc_msg, _) = Message::from_armor_single(ctext)?;
     let decryptor = enc_msg.decrypt_with_password(|| passphrase.into())?;
 
-    let msgs = decryptor.collect::<Result<Vec<_>, _>>()?;
+    let msgs = decryptor.collect::<pgp::errors::Result<Vec<_>>>()?;
     ensure!(!msgs.is_empty(), "No valid messages found");
 
     match msgs[0].get_content()? {

src/qr.rs

@@ -69,7 +69,7 @@ fn decode_openpgp(context: &Context, qr: &str) -> Lot {
         (fp, &rest[1..])
     }) {
         Some(pair) => pair,
-        None => return format_err!("Invalid OPENPGP4FPR found").into(),
+        None => (payload, ""),
     };
 
     // replace & with \n to match expected param format
@@ -83,11 +83,11 @@ fn decode_openpgp(context: &Context, qr: &str) -> Lot {
 
     let addr = if let Some(addr) = param.get(Param::Forwarded) {
         match normalize_address(addr) {
-            Ok(addr) => addr,
+            Ok(addr) => Some(addr),
             Err(err) => return err.into(),
         }
     } else {
-        return format_err!("Missing address").into();
+        None
     };
 
     // what is up with that param name?
@@ -157,7 +157,7 @@ fn decode_openpgp(context: &Context, qr: &str) -> Lot {
             lot.state = LotState::QrFprWithoutAddr;
             lot.text1 = Some(dc_format_fingerprint(&fingerprint));
         }
-    } else {
+    } else if let Some(addr) = addr {
         if grpid.is_some() && grpname.is_some() {
             lot.state = LotState::QrAskVerifyGroup;
             lot.text1 = grpname;
@@ -172,6 +172,8 @@ fn decode_openpgp(context: &Context, qr: &str) -> Lot {
         lot.fingerprint = Some(fingerprint);
         lot.invitenumber = invitenumber;
         lot.auth = auth;
+    } else {
+        return format_err!("Missing address").into();
     }
 
     lot
@@ -471,4 +473,24 @@ mod tests {
         assert_eq!(contact.get_addr(), "cli@deltachat.de");
         assert_eq!(contact.get_name(), "Jörn P. P.");
     }
+
+    #[test]
+    fn test_decode_openpgp_without_addr() {
+        let ctx = dummy_context();
+
+        let res = check_qr(
+            &ctx.ctx,
+            "OPENPGP4FPR:1234567890123456789012345678901234567890",
+        );
+        assert_eq!(res.get_state(), LotState::QrFprWithoutAddr);
+        assert_eq!(
+            res.get_text1().unwrap(),
+            "1234 5678 9012 3456 7890\n1234 5678 9012 3456 7890"
+        );
+        assert_eq!(res.get_id(), 0);
+
+        let res = check_qr(&ctx.ctx, "OPENPGP4FPR:12345678901234567890");
+        assert_eq!(res.get_state(), LotState::QrError);
+        assert_eq!(res.get_id(), 0);
+    }
 }

src/securejoin.rs

@@ -66,14 +66,17 @@ macro_rules! get_qr_attr {
 }
 
 pub fn dc_get_securejoin_qr(context: &Context, group_chat_id: u32) -> Option<String> {
-    /* =========================================================
+    /*=======================================================
     ====             Alice - the inviter side            ====
     ====   Step 1 in "Setup verified contact" protocol   ====
-    ========================================================= */
+    =======================================================*/
 
     let fingerprint: String;
 
     ensure_secret_key_exists(context).ok();
+
+    // invitenumber will be used to allow starting the handshake,
+    // auth will be used to verify the fingerprint
     let invitenumber = token::lookup_or_new(context, token::Namespace::InviteNumber, group_chat_id);
     let auth = token::lookup_or_new(context, token::Namespace::Auth, group_chat_id);
     let self_addr = match context.get_config(Config::ConfiguredAddr) {
@@ -99,6 +102,7 @@ pub fn dc_get_securejoin_qr(context: &Context, group_chat_id: u32) -> Option<Str
         utf8_percent_encode(&self_name, NON_ALPHANUMERIC_WITHOUT_DOT).to_string();
 
     let qr = if 0 != group_chat_id {
+        // parameters used: a=g=x=i=s=
         if let Ok(chat) = Chat::load_from_db(context, group_chat_id) {
             let group_name = chat.get_name();
             let group_name_urlencoded =
@@ -118,6 +122,7 @@ pub fn dc_get_securejoin_qr(context: &Context, group_chat_id: u32) -> Option<Str
             return None;
         }
     } else {
+        // parameters used: a=n=i=s=
         Some(format!(
             "OPENPGP4FPR:{}#a={}&n={}&i={}&s={}",
             fingerprint, self_addr_urlencoded, self_name_urlencoded, &invitenumber, &auth,
@@ -149,6 +154,7 @@ pub fn dc_join_securejoin(context: &Context, qr: &str) -> u32 {
                         context,
                         bob.qr_scan.as_ref().unwrap().text2.as_ref().unwrap(),
                     )
+                    .unwrap_or((0, false, Blocked::Not))
                     .0
                 } else {
                     contact_chat_id
@@ -163,10 +169,12 @@ pub fn dc_join_securejoin(context: &Context, qr: &str) -> u32 {
             }
             ret_chat_id as u32
         };
-    /* ==========================================================
+
+    /*========================================================
     ====             Bob - the joiner's side             =====
     ====   Step 2 in "Setup verified contact" protocol   =====
-    ========================================================== */
+    ========================================================*/
+
     let mut contact_chat_id: u32 = 0;
     let mut join_vg: bool = false;
 
@@ -209,10 +217,14 @@ pub fn dc_join_securejoin(context: &Context, qr: &str) -> u32 {
             .unwrap(),
         contact_chat_id,
     ) {
+        // the scanned fingerprint matches Alice's key,
+        // we can proceed to step 4b) directly and save two mails
         info!(context, "Taking protocol shortcut.");
         context.bob.write().unwrap().expects = DC_VC_CONTACT_CONFIRM;
         joiner_progress!(context, chat_id_2_contact_id(context, contact_chat_id), 400);
         let own_fingerprint = get_self_fingerprint(context).unwrap_or_default();
+
+        // Bob -> Alice
         send_handshake_msg(
             context,
             contact_chat_id,
@@ -231,6 +243,8 @@ pub fn dc_join_securejoin(context: &Context, qr: &str) -> u32 {
         );
     } else {
         context.bob.write().unwrap().expects = DC_VC_AUTH_REQUIRED;
+
+        // Bob -> Alice
         send_handshake_msg(
             context,
             contact_chat_id,
@@ -241,7 +255,6 @@ pub fn dc_join_securejoin(context: &Context, qr: &str) -> u32 {
         );
     }
 
-    // Bob -> Alice
     while !context.shall_stop_ongoing() {
         // Don't sleep too long, the user is waiting.
         std::thread::sleep(std::time::Duration::from_millis(200));
@@ -258,7 +271,7 @@ fn send_handshake_msg(
     grpid: impl AsRef<str>,
 ) {
     let mut msg = Message::default();
-    msg.type_0 = Viewtype::Text;
+    msg.viewtype = Viewtype::Text;
     msg.text = Some(format!("Secure-Join: {}", step));
     msg.hidden = true;
     msg.param.set_cmd(SystemMessage::SecurejoinMessage);
@@ -319,80 +332,115 @@ fn fingerprint_equals_sender(
     }
     false
 }
-
-pub(crate) struct HandshakeMessageStatus {
-    pub(crate) hide_this_msg: bool,
-    pub(crate) delete_this_msg: bool,
-    pub(crate) stop_ongoing_process: bool,
-    pub(crate) bob_securejoin_success: Option<bool>,
+#[derive(Fail, Debug)]
+pub(crate) enum HandshakeError {
+    #[fail(display = "Can not be called with special contact ID")]
+    SpecialContactId,
+    #[fail(display = "Not a Secure-Join message")]
+    NotSecureJoinMsg,
+    #[fail(
+        display = "Failed to look up or create chat for contact #{}",
+        contact_id
+    )]
+    NoChat {
+        contact_id: u32,
+        #[cause]
+        cause: Error,
+    },
+    #[fail(display = "Chat for group {} not found", group)]
+    ChatNotFound { group: String },
+    #[fail(display = "No configured self address found")]
+    NoSelfAddr,
 }
 
-impl Default for HandshakeMessageStatus {
-    fn default() -> Self {
-        Self {
-            hide_this_msg: true,
-            delete_this_msg: false,
-            stop_ongoing_process: false,
-            bob_securejoin_success: None,
-        }
-    }
+/// What to do with a Secure-Join handshake message after it was handled.
+pub(crate) enum HandshakeMessage {
+    /// The message has been fully handled and should be removed/delete.
+    Done,
+    /// The message should be ignored/hidden, but not removed/deleted.
+    Ignore,
+    /// The message should be further processed by incoming message handling.
+    Propagate,
 }
 
 /// Handle incoming secure-join handshake.
+///
+/// This function will update the securejoin state in [Context::bob]
+/// and also terminate the ongoing process using
+/// [Context::stop_ongoing] as required by the protocol.
+///
+/// A message which results in [Err] will be hidden from the user but
+/// not deleted, it may be a valid message for something else we are
+/// not aware off.  E.g. it could be part of a handshake performed by
+/// another DC app on the same account.
+///
+/// When handle_securejoin_handshake() is called,
+/// the message is not yet filed in the database;
+/// this is done by receive_imf() later on as needed.
 pub(crate) fn handle_securejoin_handshake(
     context: &Context,
-    mimeparser: &MimeParser,
+    mime_message: &MimeMessage,
     contact_id: u32,
-) -> Result<HandshakeMessageStatus, Error> {
+) -> Result<HandshakeMessage, HandshakeError> {
     let own_fingerprint: String;
 
-    ensure!(
-        contact_id > DC_CONTACT_ID_LAST_SPECIAL,
-        "handle_securejoin_handshake(): called with special contact id"
-    );
-    let step = mimeparser
+    if contact_id <= DC_CONTACT_ID_LAST_SPECIAL {
+        return Err(HandshakeError::SpecialContactId);
+    }
+    let step = mime_message
         .get(HeaderDef::SecureJoin)
-        .ok_or_else(|| format_err!("This message is not a Secure-Join message"))?;
+        .ok_or(HandshakeError::NotSecureJoinMsg)?;
 
     info!(
         context,
         ">>>>>>>>>>>>>>>>>>>>>>>>> secure-join message \'{}\' received", step,
     );
 
-    let (contact_chat_id, contact_chat_id_blocked) =
-        chat::create_or_lookup_by_contact_id(context, contact_id, Blocked::Not).unwrap_or_default();
-
-    if contact_chat_id_blocked != Blocked::Not {
-        chat::unblock(context, contact_chat_id);
-    }
+    let contact_chat_id =
+        match chat::create_or_lookup_by_contact_id(context, contact_id, Blocked::Not) {
+            Ok((chat_id, blocked)) => {
+                if blocked != Blocked::Not {
+                    chat::unblock(context, chat_id);
+                }
+                chat_id
+            }
+            Err(err) => {
+                return Err(HandshakeError::NoChat {
+                    contact_id,
+                    cause: err,
+                });
+            }
+        };
 
     let join_vg = step.starts_with("vg-");
-    let mut ret = HandshakeMessageStatus::default();
 
     match step.as_str() {
         "vg-request" | "vc-request" => {
-            /* =========================================================
+            /*=======================================================
             ====             Alice - the inviter side            ====
             ====   Step 3 in "Setup verified contact" protocol   ====
-            ========================================================= */
-            // this message may be unencrypted (Bob, the joinder and the sender, might not have Alice's key yet)
+            =======================================================*/
+
+            // this message may be unencrypted (Bob, the joiner and the sender, might not have Alice's key yet)
             // it just ensures, we have Bobs key now. If we do _not_ have the key because eg. MitM has removed it,
             // send_message() will fail with the error "End-to-end-encryption unavailable unexpectedly.", so, there is no additional check needed here.
             // verify that the `Secure-Join-Invitenumber:`-header matches invitenumber written to the QR code
-            let invitenumber = match mimeparser.get(HeaderDef::SecureJoinInvitenumber) {
+            let invitenumber = match mime_message.get(HeaderDef::SecureJoinInvitenumber) {
                 Some(n) => n,
                 None => {
-                    warn!(context, "Secure-join denied (invitenumber missing).",);
-                    return Ok(ret);
+                    warn!(context, "Secure-join denied (invitenumber missing)");
+                    return Ok(HandshakeMessage::Ignore);
                 }
             };
             if !token::exists(context, token::Namespace::InviteNumber, &invitenumber) {
-                warn!(context, "Secure-join denied (bad invitenumber).",);
-                return Ok(ret);
+                warn!(context, "Secure-join denied (bad invitenumber).");
+                return Ok(HandshakeMessage::Ignore);
             }
             info!(context, "Secure-join requested.",);
 
             inviter_progress!(context, contact_id, 300);
+
+            // Alice -> Bob
             send_handshake_msg(
                 context,
                 contact_chat_id,
@@ -401,8 +449,15 @@ pub(crate) fn handle_securejoin_handshake(
                 None,
                 "",
             );
+            Ok(HandshakeMessage::Done)
         }
         "vg-auth-required" | "vc-auth-required" => {
+            /*========================================================
+            ====             Bob - the joiner's side             =====
+            ====   Step 4 in "Setup verified contact" protocol   =====
+            ========================================================*/
+
+            // verify that Alice's Autocrypt key and fingerprint matches the QR-code
             let cond = {
                 let bob = context.bob.read().unwrap();
                 let scan = bob.qr_scan.as_ref();
@@ -412,26 +467,26 @@ pub(crate) fn handle_securejoin_handshake(
             };
 
             if cond {
-                warn!(context, "auth-required message out of sync.",);
+                warn!(context, "auth-required message out of sync.");
                 // no error, just aborted somehow or a mail from another handshake
-                return Ok(ret);
+                return Ok(HandshakeMessage::Ignore);
             }
             let scanned_fingerprint_of_alice = get_qr_attr!(context, fingerprint).to_string();
             let auth = get_qr_attr!(context, auth).to_string();
 
-            if !encrypted_and_signed(mimeparser, &scanned_fingerprint_of_alice) {
+            if !encrypted_and_signed(mime_message, &scanned_fingerprint_of_alice) {
                 could_not_establish_secure_connection(
                     context,
                     contact_chat_id,
-                    if mimeparser.was_encrypted() {
+                    if mime_message.was_encrypted() {
                         "No valid signature."
                     } else {
                         "Not encrypted."
                     },
                 );
-                ret.stop_ongoing_process = true;
-                ret.bob_securejoin_success = Some(false);
-                return Ok(ret);
+                context.bob.write().unwrap().status = 0; // secure-join failed
+                context.stop_ongoing();
+                return Ok(HandshakeMessage::Ignore);
             }
             if !fingerprint_equals_sender(context, &scanned_fingerprint_of_alice, contact_chat_id) {
                 could_not_establish_secure_connection(
@@ -439,15 +494,16 @@ pub(crate) fn handle_securejoin_handshake(
                     contact_chat_id,
                     "Fingerprint mismatch on joiner-side.",
                 );
-                ret.stop_ongoing_process = true;
-                ret.bob_securejoin_success = Some(false);
-                return Ok(ret);
+                context.bob.write().unwrap().status = 0; // secure-join failed
+                context.stop_ongoing();
+                return Ok(HandshakeMessage::Ignore);
             }
             info!(context, "Fingerprint verified.",);
             own_fingerprint = get_self_fingerprint(context).unwrap();
             joiner_progress!(context, contact_id, 400);
             context.bob.write().unwrap().expects = DC_VC_CONTACT_CONFIRM;
 
+            // Bob -> Alice
             send_handshake_msg(
                 context,
                 contact_chat_id,
@@ -460,15 +516,17 @@ pub(crate) fn handle_securejoin_handshake(
                     "".to_string()
                 },
             );
+            Ok(HandshakeMessage::Done)
         }
         "vg-request-with-auth" | "vc-request-with-auth" => {
-            /* ============================================================
+            /*==========================================================
             ====              Alice - the inviter side              ====
             ====   Steps 5+6 in "Setup verified contact" protocol   ====
             ====  Step 6 in "Out-of-band verified groups" protocol  ====
-            ============================================================ */
+            ==========================================================*/
+
             // verify that Secure-Join-Fingerprint:-header matches the fingerprint of Bob
-            let fingerprint = match mimeparser.get(HeaderDef::SecureJoinFingerprint) {
+            let fingerprint = match mime_message.get(HeaderDef::SecureJoinFingerprint) {
                 Some(fp) => fp,
                 None => {
                     could_not_establish_secure_connection(
@@ -476,16 +534,16 @@ pub(crate) fn handle_securejoin_handshake(
                         contact_chat_id,
                         "Fingerprint not provided.",
                     );
-                    return Ok(ret);
+                    return Ok(HandshakeMessage::Ignore);
                 }
             };
-            if !encrypted_and_signed(mimeparser, &fingerprint) {
+            if !encrypted_and_signed(mime_message, &fingerprint) {
                 could_not_establish_secure_connection(
                     context,
                     contact_chat_id,
                     "Auth not encrypted.",
                 );
-                return Ok(ret);
+                return Ok(HandshakeMessage::Ignore);
             }
             if !fingerprint_equals_sender(context, &fingerprint, contact_chat_id) {
                 could_not_establish_secure_connection(
@@ -493,11 +551,11 @@ pub(crate) fn handle_securejoin_handshake(
                     contact_chat_id,
                     "Fingerprint mismatch on inviter-side.",
                 );
-                return Ok(ret);
+                return Ok(HandshakeMessage::Ignore);
             }
             info!(context, "Fingerprint verified.",);
             // verify that the `Secure-Join-Auth:`-header matches the secret written to the QR code
-            let auth_0 = match mimeparser.get(HeaderDef::SecureJoinAuth) {
+            let auth_0 = match mime_message.get(HeaderDef::SecureJoinAuth) {
                 Some(auth) => auth,
                 None => {
                     could_not_establish_secure_connection(
@@ -505,12 +563,12 @@ pub(crate) fn handle_securejoin_handshake(
                         contact_chat_id,
                         "Auth not provided.",
                     );
-                    return Ok(ret);
+                    return Ok(HandshakeMessage::Ignore);
                 }
             };
             if !token::exists(context, token::Namespace::Auth, &auth_0) {
                 could_not_establish_secure_connection(context, contact_chat_id, "Auth invalid.");
-                return Ok(ret);
+                return Ok(HandshakeMessage::Ignore);
             }
             if mark_peer_as_verified(context, fingerprint).is_err() {
                 could_not_establish_secure_connection(
@@ -518,7 +576,7 @@ pub(crate) fn handle_securejoin_handshake(
                     contact_chat_id,
                     "Fingerprint mismatch on inviter-side.",
                 );
-                return Ok(ret);
+                return Ok(HandshakeMessage::Ignore);
             }
             Contact::scaleup_origin_by_id(context, contact_id, Origin::SecurejoinInvited);
             info!(context, "Auth verified.",);
@@ -526,31 +584,47 @@ pub(crate) fn handle_securejoin_handshake(
             emit_event!(context, Event::ContactsChanged(Some(contact_id)));
             inviter_progress!(context, contact_id, 600);
             if join_vg {
-                let field_grpid = mimeparser
-                    .get(HeaderDef::SecureJoinGroup)
-                    .map(|s| s.as_str())
-                    .unwrap_or_else(|| "");
-                let (group_chat_id, _, _) = chat::get_chat_id_by_grpid(context, field_grpid);
-                if group_chat_id == 0 {
-                    error!(context, "Chat {} not found.", &field_grpid);
-                    return Ok(ret);
-                } else if let Err(err) =
-                    chat::add_contact_to_chat_ex(context, group_chat_id, contact_id, true)
-                {
-                    error!(context, "failed to add contact: {}", err);
+                // the vg-member-added message is special:
+                // this is a normal Chat-Group-Member-Added message
+                // with an additional Secure-Join header
+                let field_grpid = match mime_message.get(HeaderDef::SecureJoinGroup) {
+                    Some(s) => s.as_str(),
+                    None => {
+                        warn!(context, "Missing Secure-Join-Group header");
+                        return Ok(HandshakeMessage::Ignore);
+                    }
+                };
+                match chat::get_chat_id_by_grpid(context, field_grpid) {
+                    Ok((group_chat_id, _, _)) => {
+                        if let Err(err) =
+                            chat::add_contact_to_chat_ex(context, group_chat_id, contact_id, true)
+                        {
+                            error!(context, "failed to add contact: {}", err);
+                        }
+                    }
+                    Err(err) => {
+                        error!(context, "Chat {} not found: {}", &field_grpid, err);
+                        return Err(HandshakeError::ChatNotFound {
+                            group: field_grpid.to_string(),
+                        });
+                    }
                 }
             } else {
+                // Alice -> Bob
                 send_handshake_msg(context, contact_chat_id, "vc-contact-confirm", "", None, "");
                 inviter_progress!(context, contact_id, 1000);
             }
+            Ok(HandshakeMessage::Done)
         }
         "vg-member-added" | "vc-contact-confirm" => {
-            if join_vg {
-                ret.hide_this_msg = false;
-            }
+            /*=======================================================
+            ====             Bob - the joiner's side             ====
+            ====   Step 7 in "Setup verified contact" protocol   ====
+            =======================================================*/
+
             if context.bob.read().unwrap().expects != DC_VC_CONTACT_CONFIRM {
                 info!(context, "Message belongs to a different handshake.",);
-                return Ok(ret);
+                return Ok(HandshakeMessage::Propagate);
             }
             let cond = {
                 let bob = context.bob.read().unwrap();
@@ -562,13 +636,19 @@ pub(crate) fn handle_securejoin_handshake(
                     context,
                     "Message out of sync or belongs to a different handshake.",
                 );
-                return Ok(ret);
+                return Ok(HandshakeMessage::Propagate);
             }
             let scanned_fingerprint_of_alice = get_qr_attr!(context, fingerprint).to_string();
 
             let vg_expect_encrypted = if join_vg {
                 let group_id = get_qr_attr!(context, text2).to_string();
-                let (_, is_verified_group, _) = chat::get_chat_id_by_grpid(context, group_id);
+                // This is buggy, is_verified_group will always be
+                // false since the group is created by receive_imf by
+                // the very handshake message we're handling now.  But
+                // only after we have returned.  It does not impact
+                // the security invariants of secure-join however.
+                let (_, is_verified_group, _) = chat::get_chat_id_by_grpid(context, &group_id)
+                    .unwrap_or((0, false, Blocked::Not));
                 // when joining a non-verified group
                 // the vg-member-added message may be unencrypted
                 // when not all group members have keys or prefer encryption.
@@ -579,15 +659,15 @@ pub(crate) fn handle_securejoin_handshake(
                 true
             };
             if vg_expect_encrypted
-                && !encrypted_and_signed(mimeparser, &scanned_fingerprint_of_alice)
+                && !encrypted_and_signed(mime_message, &scanned_fingerprint_of_alice)
             {
                 could_not_establish_secure_connection(
                     context,
                     contact_chat_id,
                     "Contact confirm message not encrypted.",
                 );
-                ret.bob_securejoin_success = Some(false);
-                return Ok(ret);
+                context.bob.write().unwrap().status = 0;
+                return Ok(HandshakeMessage::Propagate);
             }
 
             if mark_peer_as_verified(context, &scanned_fingerprint_of_alice).is_err() {
@@ -596,21 +676,26 @@ pub(crate) fn handle_securejoin_handshake(
                     contact_chat_id,
                     "Fingerprint mismatch on joiner-side.",
                 );
-                return Ok(ret);
+                return Ok(HandshakeMessage::Propagate);
             }
             Contact::scaleup_origin_by_id(context, contact_id, Origin::SecurejoinJoined);
             emit_event!(context, Event::ContactsChanged(None));
-            let cg_member_added = mimeparser
+            let cg_member_added = mime_message
                 .get(HeaderDef::ChatGroupMemberAdded)
                 .map(|s| s.as_str())
                 .unwrap_or_else(|| "");
-            if join_vg && !context.is_self_addr(cg_member_added)? {
+            if join_vg
+                && !context
+                    .is_self_addr(cg_member_added)
+                    .map_err(|_| HandshakeError::NoSelfAddr)?
+            {
                 info!(context, "Message belongs to a different handshake (scaled up contact anyway to allow creation of group).");
-                return Ok(ret);
+                return Ok(HandshakeMessage::Propagate);
             }
             secure_connection_established(context, contact_chat_id);
             context.bob.write().unwrap().expects = 0;
             if join_vg {
+                // Bob -> Alice
                 send_handshake_msg(
                     context,
                     contact_chat_id,
@@ -620,45 +705,49 @@ pub(crate) fn handle_securejoin_handshake(
                     "",
                 );
             }
-            ret.stop_ongoing_process = true;
-            ret.bob_securejoin_success = Some(true);
+            context.bob.write().unwrap().status = 1;
+            context.stop_ongoing();
+            Ok(HandshakeMessage::Propagate)
         }
         "vg-member-added-received" => {
-            /* ============================================================
+            /*==========================================================
             ====              Alice - the inviter side              ====
             ====  Step 8 in "Out-of-band verified groups" protocol  ====
-            ============================================================ */
+            ==========================================================*/
+
             if let Ok(contact) = Contact::get_by_id(context, contact_id) {
                 if contact.is_verified(context) == VerifiedStatus::Unverified {
                     warn!(context, "vg-member-added-received invalid.",);
-                    return Ok(ret);
+                    return Ok(HandshakeMessage::Ignore);
                 }
                 inviter_progress!(context, contact_id, 800);
                 inviter_progress!(context, contact_id, 1000);
-                let field_grpid = mimeparser
+                let field_grpid = mime_message
                     .get(HeaderDef::SecureJoinGroup)
                     .map(|s| s.as_str())
                     .unwrap_or_else(|| "");
-                let (group_chat_id, _, _) = chat::get_chat_id_by_grpid(context, &field_grpid);
+                let (group_chat_id, _, _) = chat::get_chat_id_by_grpid(context, &field_grpid)
+                    .map_err(|err| {
+                        warn!(context, "Failed to lookup chat_id from grpid: {}", err);
+                        HandshakeError::ChatNotFound {
+                            group: field_grpid.to_string(),
+                        }
+                    })?;
                 context.call_cb(Event::SecurejoinMemberAdded {
                     chat_id: group_chat_id,
                     contact_id,
                 });
+                Ok(HandshakeMessage::Done)
             } else {
                 warn!(context, "vg-member-added-received invalid.",);
-                return Ok(ret);
+                Ok(HandshakeMessage::Ignore)
             }
         }
         _ => {
             warn!(context, "invalid step: {}", step);
+            Ok(HandshakeMessage::Ignore)
         }
     }
-
-    if ret.hide_this_msg {
-        ret.delete_this_msg = true;
-    }
-
-    Ok(ret)
 }
 
 fn secure_connection_established(context: &Context, contact_chat_id: u32) {
@@ -717,7 +806,7 @@ fn mark_peer_as_verified(context: &Context, fingerprint: impl AsRef<str>) -> Res
  * Tools: Misc.
  ******************************************************************************/
 
-fn encrypted_and_signed(mimeparser: &MimeParser, expected_fingerprint: impl AsRef<str>) -> bool {
+fn encrypted_and_signed(mimeparser: &MimeMessage, expected_fingerprint: impl AsRef<str>) -> bool {
     if !mimeparser.was_encrypted() {
         warn!(mimeparser.context, "Message not encrypted.",);
         false

src/simplify.rs

@@ -0,0 +1,251 @@
+/// Remove standard (RFC 3676, §4.3) footer if it is found.
+fn remove_message_footer<'a>(lines: &'a [&str]) -> &'a [&'a str] {
+    for (ix, &line) in lines.iter().enumerate() {
+        // quoted-printable may encode `-- ` to `-- =20` which is converted
+        // back to `--  `
+        match line {
+            "-- " | "--  " => return &lines[..ix],
+            _ => (),
+        }
+    }
+    lines
+}
+
+/// Remove nonstandard footer and a boolean indicating whether such
+/// footer was removed.
+fn remove_nonstandard_footer<'a>(lines: &'a [&str]) -> (&'a [&'a str], bool) {
+    for (ix, &line) in lines.iter().enumerate() {
+        if line == "--"
+            || line == "---"
+            || line == "----"
+            || line.starts_with("-----")
+            || line.starts_with("_____")
+            || line.starts_with("=====")
+            || line.starts_with("*****")
+            || line.starts_with("~~~~~")
+        {
+            return (&lines[..ix], true);
+        }
+    }
+    (lines, false)
+}
+
+fn split_lines(buf: &str) -> Vec<&str> {
+    buf.split('\n').collect()
+}
+
+/// Simplify message text for chat display.
+/// Remove quotes, signatures, trailing empty lines etc.
+pub fn simplify(mut input: String, is_chat_message: bool) -> (String, bool) {
+    input.retain(|c| c != '\r');
+    let lines = split_lines(&input);
+    let (lines, is_forwarded) = skip_forward_header(&lines);
+
+    let lines = remove_message_footer(lines);
+    let (lines, has_nonstandard_footer) = remove_nonstandard_footer(lines);
+    let (lines, has_bottom_quote) = if !is_chat_message {
+        remove_bottom_quote(lines)
+    } else {
+        (lines, false)
+    };
+    let (lines, has_top_quote) = if !is_chat_message {
+        remove_top_quote(lines)
+    } else {
+        (lines, false)
+    };
+
+    // re-create buffer from the remaining lines
+    let text = render_message(
+        lines,
+        has_top_quote,
+        has_nonstandard_footer || has_bottom_quote,
+    );
+    (text, is_forwarded)
+}
+
+/// Skips "forwarded message" header.
+/// Returns message body lines and a boolean indicating whether
+/// a message is forwarded or not.
+fn skip_forward_header<'a>(lines: &'a [&str]) -> (&'a [&'a str], bool) {
+    if lines.len() >= 3
+        && lines[0] == "---------- Forwarded message ----------"
+        && lines[1].starts_with("From: ")
+        && lines[2].is_empty()
+    {
+        (&lines[3..], true)
+    } else {
+        (lines, false)
+    }
+}
+
+fn remove_bottom_quote<'a>(lines: &'a [&str]) -> (&'a [&'a str], bool) {
+    let mut last_quoted_line = None;
+    for (l, line) in lines.iter().enumerate().rev() {
+        if is_plain_quote(line) {
+            last_quoted_line = Some(l)
+        } else if !is_empty_line(line) {
+            break;
+        }
+    }
+    if let Some(mut l_last) = last_quoted_line {
+        if l_last > 1 && is_empty_line(lines[l_last - 1]) {
+            l_last -= 1
+        }
+        if l_last > 1 {
+            let line = lines[l_last - 1];
+            if is_quoted_headline(line) {
+                l_last -= 1
+            }
+        }
+        (&lines[..l_last], true)
+    } else {
+        (lines, false)
+    }
+}
+
+fn remove_top_quote<'a>(lines: &'a [&str]) -> (&'a [&'a str], bool) {
+    let mut last_quoted_line = None;
+    let mut has_quoted_headline = false;
+    for (l, line) in lines.iter().enumerate() {
+        if is_plain_quote(line) {
+            last_quoted_line = Some(l)
+        } else if !is_empty_line(line) {
+            if is_quoted_headline(line) && !has_quoted_headline && last_quoted_line.is_none() {
+                has_quoted_headline = true
+            } else {
+                /* non-quoting line found */
+                break;
+            }
+        }
+    }
+    if let Some(last_quoted_line) = last_quoted_line {
+        (&lines[last_quoted_line + 1..], true)
+    } else {
+        (lines, false)
+    }
+}
+
+fn render_message(lines: &[&str], is_cut_at_begin: bool, is_cut_at_end: bool) -> String {
+    let mut ret = String::new();
+    if is_cut_at_begin {
+        ret += "[...]";
+    }
+    /* we write empty lines only in case and non-empty line follows */
+    let mut pending_linebreaks = 0;
+    let mut empty_body = true;
+    for line in lines {
+        if is_empty_line(line) {
+            pending_linebreaks += 1
+        } else {
+            if !empty_body {
+                if pending_linebreaks > 2 {
+                    pending_linebreaks = 2
+                }
+                while 0 != pending_linebreaks {
+                    ret += "\n";
+                    pending_linebreaks -= 1
+                }
+            }
+            // the incoming message might contain invalid UTF8
+            ret += line;
+            empty_body = false;
+            pending_linebreaks = 1
+        }
+    }
+    if is_cut_at_end && (!is_cut_at_begin || !empty_body) {
+        ret += " [...]";
+    }
+    ret
+}
+
+/**
+ * Tools
+ */
+fn is_empty_line(buf: &str) -> bool {
+    // XXX: can it be simplified to buf.chars().all(|c| c.is_whitespace())?
+    //
+    // Strictly speaking, it is not equivalent (^A is not whitespace, but less than ' '),
+    // but having control sequences in email body?!
+    //
+    // See discussion at: https://github.com/deltachat/deltachat-core-rust/pull/402#discussion_r317062392
+    for c in buf.chars() {
+        if c > ' ' {
+            return false;
+        }
+    }
+
+    true
+}
+
+fn is_quoted_headline(buf: &str) -> bool {
+    /* This function may be called for the line _directly_ before a quote.
+    The function checks if the line contains sth. like "On 01.02.2016, xy@z wrote:" in various languages.
+    - Currently, we simply check if the last character is a ':'.
+    - Checking for the existence of an email address may fail (headlines may show the user's name instead of the address) */
+
+    buf.len() <= 80 && buf.ends_with(':')
+}
+
+fn is_plain_quote(buf: &str) -> bool {
+    buf.starts_with('>')
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use proptest::prelude::*;
+
+    proptest! {
+        #[test]
+        // proptest does not support [[:graphical:][:space:]] regex.
+        fn test_simplify_plain_text_fuzzy(input in "[!-~\t \n]+") {
+            let (output, _is_forwarded) = simplify(input, true);
+            assert!(output.split('\n').all(|s| s != "-- "));
+        }
+    }
+
+    #[test]
+    fn test_simplify_trim() {
+        let input = "line1\n\r\r\rline2".to_string();
+        let (plain, is_forwarded) = simplify(input, false);
+
+        assert_eq!(plain, "line1\nline2");
+        assert!(!is_forwarded);
+    }
+
+    #[test]
+    fn test_simplify_forwarded_message() {
+        let input = "---------- Forwarded message ----------\r\nFrom: test@example.com\r\n\r\nForwarded message\r\n-- \r\nSignature goes here".to_string();
+        let (plain, is_forwarded) = simplify(input, false);
+
+        assert_eq!(plain, "Forwarded message");
+        assert!(is_forwarded);
+    }
+
+    #[test]
+    fn test_simplify_utilities() {
+        assert!(is_empty_line(" \t"));
+        assert!(is_empty_line(""));
+        assert!(is_empty_line(" \r"));
+        assert!(!is_empty_line(" x"));
+        assert!(is_plain_quote("> hello world"));
+        assert!(is_plain_quote(">>"));
+        assert!(!is_plain_quote("Life is pain"));
+        assert!(!is_plain_quote(""));
+    }
+
+    #[test]
+    fn test_remove_top_quote() {
+        let (lines, has_top_quote) = remove_top_quote(&["> first", "> second"]);
+        assert!(lines.is_empty());
+        assert!(has_top_quote);
+
+        let (lines, has_top_quote) = remove_top_quote(&["> first", "> second", "not a quote"]);
+        assert_eq!(lines, &["not a quote"]);
+        assert!(has_top_quote);
+
+        let (lines, has_top_quote) = remove_top_quote(&["not a quote", "> first", "> second"]);
+        assert_eq!(lines, &["not a quote", "> first", "> second"]);
+        assert!(!has_top_quote);
+    }
+}

src/smtp/mod.rs

@@ -2,33 +2,41 @@
 
 pub mod send;
 
+use std::time::Duration;
+
 use async_smtp::smtp::client::net::*;
 use async_smtp::*;
 
-use async_std::task;
-
 use crate::constants::*;
 use crate::context::Context;
 use crate::events::Event;
 use crate::login_param::{dc_build_tls, LoginParam};
 use crate::oauth2::*;
 
+/// SMTP write and read timeout in seconds.
+const SMTP_TIMEOUT: u64 = 30;
+
 #[derive(Debug, Fail)]
 pub enum Error {
     #[fail(display = "Bad parameters")]
     BadParameters,
+
     #[fail(display = "Invalid login address {}: {}", address, error)]
     InvalidLoginAddress {
         address: String,
         #[cause]
-        error: async_smtp::error::Error,
+        error: error::Error,
     },
+
     #[fail(display = "SMTP failed to connect: {:?}", _0)]
-    ConnectionFailure(#[cause] async_smtp::smtp::error::Error),
+    ConnectionFailure(#[cause] smtp::error::Error),
+
     #[fail(display = "SMTP: failed to setup connection {:?}", _0)]
-    ConnectionSetupFailure(#[cause] async_smtp::smtp::error::Error),
+    ConnectionSetupFailure(#[cause] smtp::error::Error),
+
     #[fail(display = "SMTP: oauth2 error {:?}", _0)]
     Oauth2Error { address: String },
+
     #[fail(display = "TLS error")]
     Tls(#[cause] native_tls::Error),
 }
@@ -44,7 +52,7 @@ pub type Result<T> = std::result::Result<T, Error>;
 #[derive(Default, DebugStub)]
 pub struct Smtp {
     #[debug_stub(some = "SmtpTransport")]
-    transport: Option<async_smtp::smtp::SmtpTransport>,
+    transport: Option<smtp::SmtpTransport>,
     /// Email address we are sending from.
     from: Option<EmailAddress>,
 }
@@ -57,18 +65,25 @@ impl Smtp {
 
     /// Disconnect the SMTP transport and drop it entirely.
     pub fn disconnect(&mut self) {
-        if let Some(ref mut transport) = self.transport.take() {
-            transport.close();
+        if let Some(mut transport) = self.transport.take() {
+            async_std::task::block_on(transport.close()).ok();
         }
     }
 
-    /// check whether we are connected
+    /// Check whether we are connected.
     pub fn is_connected(&self) -> bool {
-        self.transport.is_some()
+        self.transport
+            .as_ref()
+            .map(|t| t.is_connected())
+            .unwrap_or_default()
     }
 
-    /// Connect using the provided login params
+    /// Connect using the provided login params.
     pub fn connect(&mut self, context: &Context, lp: &LoginParam) -> Result<()> {
+        async_std::task::block_on(self.inner_connect(context, lp))
+    }
+
+    async fn inner_connect(&mut self, context: &Context, lp: &LoginParam) -> Result<()> {
         if self.is_connected() {
             warn!(context, "SMTP already connected.");
             return Ok(());
@@ -104,21 +119,21 @@ impl Smtp {
             }
             let user = &lp.send_user;
             (
-                async_smtp::smtp::authentication::Credentials::new(
+                smtp::authentication::Credentials::new(
                     user.to_string(),
                     access_token.unwrap_or_default(),
                 ),
-                vec![async_smtp::smtp::authentication::Mechanism::Xoauth2],
+                vec![smtp::authentication::Mechanism::Xoauth2],
             )
         } else {
             // plain
             let user = lp.send_user.clone();
             let pw = lp.send_pw.clone();
             (
-                async_smtp::smtp::authentication::Credentials::new(user, pw),
+                smtp::authentication::Credentials::new(user, pw),
                 vec![
-                    async_smtp::smtp::authentication::Mechanism::Plain,
-                    async_smtp::smtp::authentication::Mechanism::Login,
+                    smtp::authentication::Mechanism::Plain,
+                    smtp::authentication::Mechanism::Login,
                 ],
             )
         };
@@ -126,30 +141,31 @@ impl Smtp {
         let security = if 0
             != lp.server_flags & (DC_LP_SMTP_SOCKET_STARTTLS | DC_LP_SMTP_SOCKET_PLAIN) as i32
         {
-            async_smtp::smtp::ClientSecurity::Opportunistic(tls_parameters)
+            smtp::ClientSecurity::Opportunistic(tls_parameters)
         } else {
-            async_smtp::smtp::ClientSecurity::Wrapper(tls_parameters)
+            smtp::ClientSecurity::Wrapper(tls_parameters)
         };
 
-        let client = task::block_on(async_smtp::smtp::SmtpClient::with_security(
-            (domain.as_str(), port),
-            security,
-        ))
-        .map_err(Error::ConnectionSetupFailure)?;
+        let client = smtp::SmtpClient::with_security((domain.as_str(), port), security)
+            .await
+            .map_err(Error::ConnectionSetupFailure)?;
 
         let client = client
             .smtp_utf8(true)
             .credentials(creds)
             .authentication_mechanism(mechanism)
-            .connection_reuse(async_smtp::smtp::ConnectionReuseParameters::ReuseUnlimited);
+            .connection_reuse(smtp::ConnectionReuseParameters::ReuseUnlimited)
+            .timeout(Some(Duration::from_secs(SMTP_TIMEOUT)));
+
         let mut trans = client.into_transport();
-        task::block_on(trans.connect()).map_err(Error::ConnectionFailure)?;
+        trans.connect().await.map_err(Error::ConnectionFailure)?;
 
         self.transport = Some(trans);
         context.call_cb(Event::SmtpConnected(format!(
             "SMTP-LOGIN as {} ok",
             lp.send_user,
         )));
+
         Ok(())
     }
 }

src/smtp/send.rs

@@ -12,8 +12,10 @@ pub type Result<T> = std::result::Result<T, Error>;
 pub enum Error {
     #[fail(display = "Envelope error: {}", _0)]
     EnvelopeError(#[cause] async_smtp::error::Error),
+
     #[fail(display = "Send error: {}", _0)]
     SendError(#[cause] async_smtp::smtp::error::Error),
+
     #[fail(display = "SMTP has no transport")]
     NoTransport,
 }
@@ -43,6 +45,7 @@ impl Smtp {
             format!("{}", job_id), // only used for internal logging
             message,
         );
+
         if let Some(ref mut transport) = self.transport {
             transport.send(mail).await.map_err(Error::SendError)?;
 
@@ -50,7 +53,6 @@ impl Smtp {
                 "Message len={} was smtp-sent to {}",
                 message_len, recipients_display
             )));
-
             Ok(())
         } else {
             warn!(

src/sql.rs

@@ -544,7 +544,7 @@ fn open(
         // --------------------------------------------------------------------
 
         let mut dbversion = dbversion_before_update;
-        let mut recalc_fingerprints = 0;
+        let mut recalc_fingerprints = false;
         let mut update_icons = false;
 
         if dbversion < 1 {
@@ -687,7 +687,7 @@ fn open(
                 "CREATE INDEX acpeerstates_index4 ON acpeerstates (gossip_key_fingerprint);",
                 params![],
             )?;
-            recalc_fingerprints = 1;
+            recalc_fingerprints = true;
             dbversion = 34;
             sql.set_raw_config_int(context, "dbversion", 34)?;
         }
@@ -872,7 +872,7 @@ fn open(
         // (the structure is complete now and all objects are usable)
         // --------------------------------------------------------------------
 
-        if 0 != recalc_fingerprints {
+        if recalc_fingerprints {
             info!(context, "[migration] recalc fingerprints");
             sql.query_map(
                 "SELECT addr FROM acpeerstates;",

src/stock.rs

@@ -185,6 +185,9 @@ pub enum StockMessage {
                     Recipients don't need to install Delta Chat, visit websites or sign up anywhere - \
                     however, of course, if they like, you may point them to 👉 https://get.delta.chat"))]
     WelcomeMessage = 71,
+
+    #[strum(props(fallback = "Unknown Sender for this chat. See 'info' for more details."))]
+    UnknownSenderForChat = 72,
 }
 
 /*

src/test_utils.rs

@@ -2,7 +2,6 @@
 //!
 //! This module is only compiled for test runs.
 
-use libc::uintptr_t;
 use tempfile::{tempdir, TempDir};
 
 use crate::config::Config;
@@ -31,7 +30,7 @@ pub fn test_context(callback: Option<Box<ContextCallback>>) -> TestContext {
     let dbfile = dir.path().join("db.sqlite");
     let cb: Box<ContextCallback> = match callback {
         Some(cb) => cb,
-        None => Box::new(|_, _| 0),
+        None => Box::new(|_, _| ()),
     };
     let ctx = Context::new(cb, "FakeOs".into(), dbfile).unwrap();
     TestContext { ctx, dir }
@@ -46,14 +45,13 @@ pub fn dummy_context() -> TestContext {
     test_context(None)
 }
 
-pub fn logging_cb(_ctx: &Context, evt: Event) -> uintptr_t {
+pub fn logging_cb(_ctx: &Context, evt: Event) {
     match evt {
         Event::Info(msg) => println!("I: {}", msg),
         Event::Warning(msg) => println!("W: {}", msg),
         Event::Error(msg) => println!("E: {}", msg),
         _ => (),
     }
-    0
 }
 
 /// Creates Alice with a pre-generated keypair.

src/top_evil_rs.py

@@ -1,40 +0,0 @@
-#!/usr/bin/env python3
-
-
-from pathlib import Path
-import os
-import re
-
-if __name__ == "__main__":
-    if Path('src/top_evil_rs.py').exists():
-        os.chdir('src')
-    filestats = []
-    for fn in Path(".").glob("**/*.rs"):
-        s = fn.read_text()
-        s = re.sub(r"(?m)///.*$", "", s)  # remove comments
-        unsafe = s.count("unsafe")
-        free = s.count("free(")
-        unsafe_fn = s.count("unsafe fn")
-        chars = s.count("c_char") + s.count("CStr")
-        libc = s.count("libc")
-        filestats.append((fn, unsafe, free, unsafe_fn, chars, libc))
-
-    sum_unsafe, sum_free, sum_unsafe_fn, sum_chars, sum_libc = 0, 0, 0, 0, 0
-
-    for fn, unsafe, free, unsafe_fn, chars, libc in reversed(sorted(filestats, key=lambda x: sum(x[1:]))):
-        if unsafe + free + unsafe_fn + chars + libc == 0:
-            continue
-        print("{0: <25} unsafe: {1: >3} free: {2: >3} unsafe-fn: {3: >3} chars: {4: >3} libc: {5: >3}".format(str(fn), unsafe, free, unsafe_fn, chars, libc))
-        sum_unsafe += unsafe
-        sum_free += free
-        sum_unsafe_fn += unsafe_fn
-        sum_chars += chars
-        sum_libc += libc
-
-
-    print()
-    print("total unsafe:", sum_unsafe)
-    print("total free:", sum_free)
-    print("total unsafe-fn:", sum_unsafe_fn)
-    print("total c_chars:", sum_chars)
-    print("total libc:", sum_libc)

src/wrapmime.rs

@@ -1,59 +0,0 @@
-use mailparse::ParsedMail;
-
-use crate::error::Error;
-
-pub fn parse_message_id(message_id: &[u8]) -> Result<String, Error> {
-    let value = std::str::from_utf8(message_id)?;
-    let addrs = mailparse::addrparse(value)
-        .map_err(|err| format_err!("failed to parse message id {:?}", err))?;
-
-    if let Some(info) = addrs.extract_single_info() {
-        return Ok(info.addr);
-    }
-
-    bail!("could not parse message_id: {}", value);
-}
-
-/// Returns a reference to the encrypted payload and validates the autocrypt structure.
-pub fn get_autocrypt_mime<'a, 'b>(mail: &'a ParsedMail<'b>) -> Result<&'a ParsedMail<'b>, Error> {
-    ensure!(
-        mail.ctype.mimetype == "multipart/encrypted",
-        "Not a multipart/encrypted message: {}",
-        mail.ctype.mimetype
-    );
-    ensure!(
-        mail.subparts.len() == 2,
-        "Invalid Autocrypt Level 1 Mime Parts"
-    );
-
-    ensure!(
-        mail.subparts[0].ctype.mimetype == "application/pgp-encrypted",
-        "Invalid Autocrypt Level 1 version part: {:?}",
-        mail.subparts[0].ctype,
-    );
-
-    ensure!(
-        mail.subparts[1].ctype.mimetype == "application/octet-stream",
-        "Invalid Autocrypt Level 1 encrypted part: {:?}",
-        mail.subparts[1].ctype
-    );
-
-    Ok(&mail.subparts[1])
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn test_parse_message_id() {
-        assert_eq!(
-            parse_message_id(b"Mr.PRUe8HJBoaO.3whNvLCMFU0@testrun.org").unwrap(),
-            "Mr.PRUe8HJBoaO.3whNvLCMFU0@testrun.org"
-        );
-        assert_eq!(
-            parse_message_id(b"<Mr.PRUe8HJBoaO.3whNvLCMFU0@testrun.org>").unwrap(),
-            "Mr.PRUe8HJBoaO.3whNvLCMFU0@testrun.org"
-        );
-    }
-}

test-data/message/mail_with_cc.txt

@@ -9,6 +9,6 @@ message-id: <2dfdbde7@example.org>
 Date: Sat, 14 Sep 2019 19:00:13 +0200
 From: lmn <x@tux.org>
 To: abc <abc@bcd.com>
-CC: def <def@def.de>
+CC: def <Def@def.de>
 
 hi

tests/stress.rs

@@ -203,9 +203,7 @@ fn test_encryption_decryption() {
     assert_eq!(plain, original_text);
 }
 
-fn cb(_context: &Context, _event: Event) -> libc::uintptr_t {
-    0
-}
+fn cb(_context: &Context, _event: Event) {}
 
 #[allow(dead_code)]
 struct TestContext {