api: Sketch add_transport_from_qr(), add_transport(), list_transports(), delete_transport() APIs (#6589)

Four new APIs `add_transport_from_qr()`, `add_transport()`,
`list_transports()`, `delete_transport()`, as described in the draft at
"API".

The `add_tranport*()` APIs automatically stops and starts I/O; for
`configure()` the stopping and starting is done in the JsonRPC bindings,
which is not where things like this should be done I think, the bindings
should just translate the APIs.

This also completely disables AEAP for now.

I won't be available for a week, but if you want to merge this already,
feel free to just commit all review suggestions and squash-merge.

deltachat-jsonrpc/src/api.rs

@@ -39,6 +39,7 @@ use deltachat::{imex, info};
 use sanitize_filename::is_sanitized;
 use tokio::fs;
 use tokio::sync::{watch, Mutex, RwLock};
+use types::login_param::EnteredLoginParam;
 use walkdir::WalkDir;
 use yerpc::rpc;
 
@@ -431,6 +432,9 @@ impl CommandApi {
 
     /// Configures this account with the currently set parameters.
     /// Setup the credential config before calling this.
+    ///
+    /// Deprecated as of 2025-02; use `add_transport_from_qr()`
+    /// or `add_transport()` instead.
     async fn configure(&self, account_id: u32) -> Result<()> {
         let ctx = self.get_context(account_id).await?;
         ctx.stop_io().await;
@@ -445,6 +449,69 @@ impl CommandApi {
         Ok(())
     }
 
+    /// Configures a new email account using the provided parameters
+    /// and adds it as a transport.
+    ///
+    /// If the email address is the same as an existing transport,
+    /// then this existing account will be reconfigured instead of a new one being added.
+    ///
+    /// This function stops and starts IO as needed.
+    ///
+    /// Usually it will be enough to only set `addr` and `imap.password`,
+    /// and all the other settings will be autoconfigured.
+    ///
+    /// During configuration, ConfigureProgress events are emitted;
+    /// they indicate a successful configuration as well as errors
+    /// and may be used to create a progress bar.
+    /// This function will return after configuration is finished.
+    ///
+    /// If configuration is successful,
+    /// the working server parameters will be saved
+    /// and used for connecting to the server.
+    /// The parameters entered by the user will be saved separately
+    /// so that they can be prefilled when the user opens the server-configuration screen again.
+    ///
+    /// See also:
+    /// - [Self::is_configured()] to check whether there is
+    ///   at least one working transport.
+    /// - [Self::add_transport_from_qr()] to add a transport
+    ///   from a server encoded in a QR code.
+    /// - [Self::list_transports()] to get a list of all configured transports.
+    /// - [Self::delete_transport()] to remove a transport.
+    async fn add_transport(&self, account_id: u32, param: EnteredLoginParam) -> Result<()> {
+        let ctx = self.get_context(account_id).await?;
+        ctx.add_transport(&param.try_into()?).await
+    }
+
+    /// Adds a new email account as a transport
+    /// using the server encoded in the QR code.
+    /// See [Self::add_transport].
+    async fn add_transport_from_qr(&self, account_id: u32, qr: String) -> Result<()> {
+        let ctx = self.get_context(account_id).await?;
+        ctx.add_transport_from_qr(&qr).await
+    }
+
+    /// Returns the list of all email accounts that are used as a transport in the current profile.
+    /// Use [Self::add_transport()] to add or change a transport
+    /// and [Self::delete_transport()] to delete a transport.
+    async fn list_transports(&self, account_id: u32) -> Result<Vec<EnteredLoginParam>> {
+        let ctx = self.get_context(account_id).await?;
+        let res = ctx
+            .list_transports()
+            .await?
+            .into_iter()
+            .map(|t| t.into())
+            .collect();
+        Ok(res)
+    }
+
+    /// Removes the transport with the specified email address
+    /// (i.e. [EnteredLoginParam::addr]).
+    async fn delete_transport(&self, account_id: u32, addr: String) -> Result<()> {
+        let ctx = self.get_context(account_id).await?;
+        ctx.delete_transport(&addr).await
+    }
+
     /// Signal an ongoing process to stop.
     async fn stop_ongoing_process(&self, account_id: u32) -> Result<()> {
         let ctx = self.get_context(account_id).await?;

deltachat-jsonrpc/src/api/types/login_param.rs

@@ -0,0 +1,179 @@
+use anyhow::Result;
+use deltachat::login_param as dc;
+use serde::Deserialize;
+use serde::Serialize;
+use yerpc::TypeDef;
+
+#[derive(Serialize, Deserialize, TypeDef, schemars::JsonSchema)]
+#[serde(rename_all = "camelCase")]
+pub struct EnteredServerLoginParam {
+    /// Server hostname or IP address.
+    pub server: String,
+
+    /// Server port.
+    ///
+    /// 0 if not specified.
+    pub port: u16,
+
+    /// Socket security.
+    pub security: Socket,
+
+    /// Username.
+    ///
+    /// Empty string if not specified.
+    pub user: String,
+
+    /// Password.
+    pub password: String,
+}
+
+impl From<dc::EnteredServerLoginParam> for EnteredServerLoginParam {
+    fn from(param: dc::EnteredServerLoginParam) -> Self {
+        Self {
+            server: param.server,
+            port: param.port,
+            security: param.security.into(),
+            user: param.user,
+            password: param.password,
+        }
+    }
+}
+
+impl From<EnteredServerLoginParam> for dc::EnteredServerLoginParam {
+    fn from(param: EnteredServerLoginParam) -> Self {
+        Self {
+            server: param.server,
+            port: param.port,
+            security: param.security.into(),
+            user: param.user,
+            password: param.password,
+        }
+    }
+}
+
+/// Login parameters entered by the user.
+
+#[derive(Serialize, Deserialize, TypeDef, schemars::JsonSchema)]
+#[serde(rename_all = "camelCase")]
+pub struct EnteredLoginParam {
+    /// Email address.
+    pub addr: String,
+
+    /// IMAP settings.
+    pub imap: EnteredServerLoginParam,
+
+    /// SMTP settings.
+    pub smtp: EnteredServerLoginParam,
+
+    /// TLS options: whether to allow invalid certificates and/or
+    /// invalid hostnames
+    pub certificate_checks: EnteredCertificateChecks,
+
+    /// If true, login via OAUTH2 (not recommended anymore)
+    pub oauth2: bool,
+}
+
+impl From<dc::EnteredLoginParam> for EnteredLoginParam {
+    fn from(param: dc::EnteredLoginParam) -> Self {
+        Self {
+            addr: param.addr,
+            imap: param.imap.into(),
+            smtp: param.smtp.into(),
+            certificate_checks: param.certificate_checks.into(),
+            oauth2: param.oauth2,
+        }
+    }
+}
+
+impl TryFrom<EnteredLoginParam> for dc::EnteredLoginParam {
+    type Error = anyhow::Error;
+
+    fn try_from(param: EnteredLoginParam) -> Result<Self> {
+        Ok(Self {
+            addr: param.addr,
+            imap: param.imap.into(),
+            smtp: param.smtp.into(),
+            certificate_checks: param.certificate_checks.into(),
+            oauth2: param.oauth2,
+        })
+    }
+}
+
+#[derive(Serialize, Deserialize, TypeDef, schemars::JsonSchema)]
+#[serde(rename_all = "camelCase")]
+pub enum Socket {
+    /// Unspecified socket security, select automatically.
+    Automatic,
+
+    /// TLS connection.
+    Ssl,
+
+    /// STARTTLS connection.
+    Starttls,
+
+    /// No TLS, plaintext connection.
+    Plain,
+}
+
+impl From<dc::Socket> for Socket {
+    fn from(value: dc::Socket) -> Self {
+        match value {
+            dc::Socket::Automatic => Self::Automatic,
+            dc::Socket::Ssl => Self::Ssl,
+            dc::Socket::Starttls => Self::Starttls,
+            dc::Socket::Plain => Self::Plain,
+        }
+    }
+}
+
+impl From<Socket> for dc::Socket {
+    fn from(value: Socket) -> Self {
+        match value {
+            Socket::Automatic => Self::Automatic,
+            Socket::Ssl => Self::Ssl,
+            Socket::Starttls => Self::Starttls,
+            Socket::Plain => Self::Plain,
+        }
+    }
+}
+
+#[derive(Serialize, Deserialize, TypeDef, schemars::JsonSchema)]
+#[serde(rename_all = "camelCase")]
+pub enum EnteredCertificateChecks {
+    /// `Automatic` means that provider database setting should be taken.
+    /// If there is no provider database setting for certificate checks,
+    /// check certificates strictly.
+    Automatic,
+
+    /// Ensure that TLS certificate is valid for the server hostname.
+    Strict,
+
+    /// Accept certificates that are expired, self-signed
+    /// or otherwise not valid for the server hostname.
+    AcceptInvalidCertificates,
+}
+
+impl From<dc::EnteredCertificateChecks> for EnteredCertificateChecks {
+    fn from(value: dc::EnteredCertificateChecks) -> Self {
+        match value {
+            dc::EnteredCertificateChecks::Automatic => Self::Automatic,
+            dc::EnteredCertificateChecks::Strict => Self::Strict,
+            dc::EnteredCertificateChecks::AcceptInvalidCertificates => {
+                Self::AcceptInvalidCertificates
+            }
+            dc::EnteredCertificateChecks::AcceptInvalidCertificates2 => {
+                Self::AcceptInvalidCertificates
+            }
+        }
+    }
+}
+
+impl From<EnteredCertificateChecks> for dc::EnteredCertificateChecks {
+    fn from(value: EnteredCertificateChecks) -> Self {
+        match value {
+            EnteredCertificateChecks::Automatic => Self::Automatic,
+            EnteredCertificateChecks::Strict => Self::Strict,
+            EnteredCertificateChecks::AcceptInvalidCertificates => Self::AcceptInvalidCertificates,
+        }
+    }
+}

deltachat-jsonrpc/src/api/types/mod.rs

@@ -5,6 +5,7 @@ pub mod contact;
 pub mod events;
 pub mod http;
 pub mod location;
+pub mod login_param;
 pub mod message;
 pub mod provider_info;
 pub mod qr;

deltachat-rpc-client/tests/test_securejoin.py

@@ -463,6 +463,7 @@ def test_qr_new_group_unblocked(acfactory):
     assert ac2_msg.chat.get_basic_snapshot().is_contact_request
 
 
+@pytest.mark.skip(reason="AEAP is disabled for now")
 def test_aeap_flow_verified(acfactory):
     """Test that a new address is added to a contact when it changes its address."""
     ac1, ac2 = acfactory.get_online_accounts(2)

src/configure.rs

@@ -28,13 +28,15 @@ use crate::constants::NON_ALPHANUMERIC_WITHOUT_DOT;
 use crate::context::Context;
 use crate::imap::Imap;
 use crate::log::LogExt;
+pub use crate::login_param::EnteredLoginParam;
 use crate::login_param::{
     ConfiguredCertificateChecks, ConfiguredLoginParam, ConfiguredServerLoginParam,
-    ConnectionCandidate, EnteredCertificateChecks, EnteredLoginParam,
+    ConnectionCandidate, EnteredCertificateChecks, ProxyConfig,
 };
 use crate::message::Message;
 use crate::oauth2::get_oauth2_addr;
 use crate::provider::{Protocol, Socket, UsernamePattern};
+use crate::qr::set_account_from_qr;
 use crate::smtp::Smtp;
 use crate::sync::Sync::*;
 use crate::tools::time;
@@ -64,8 +66,59 @@ impl Context {
         self.sql.get_raw_config_bool("configured").await
     }
 
-    /// Configures this account with the currently set parameters.
+    /// Configures this account with the currently provided parameters.
+    ///
+    /// Deprecated since 2025-02; use `add_transport_from_qr()`
+    /// or `add_transport()` instead.
     pub async fn configure(&self) -> Result<()> {
+        let param = EnteredLoginParam::load(self).await?;
+
+        self.add_transport_inner(&param).await
+    }
+
+    /// Configures a new email account using the provided parameters
+    /// and adds it as a transport.
+    ///
+    /// If the email address is the same as an existing transport,
+    /// then this existing account will be reconfigured instead of a new one being added.
+    ///
+    /// This function stops and starts IO as needed.
+    ///
+    /// Usually it will be enough to only set `addr` and `imap.password`,
+    /// and all the other settings will be autoconfigured.
+    ///
+    /// During configuration, ConfigureProgress events are emitted;
+    /// they indicate a successful configuration as well as errors
+    /// and may be used to create a progress bar.
+    /// This function will return after configuration is finished.
+    ///
+    /// If configuration is successful,
+    /// the working server parameters will be saved
+    /// and used for connecting to the server.
+    /// The parameters entered by the user will be saved separately
+    /// so that they can be prefilled when the user opens the server-configuration screen again.
+    ///
+    /// See also:
+    /// - [Self::is_configured()] to check whether there is
+    ///   at least one working transport.
+    /// - [Self::add_transport_from_qr()] to add a transport
+    ///   from a server encoded in a QR code.
+    /// - [Self::list_transports()] to get a list of all configured transports.
+    /// - [Self::delete_transport()] to remove a transport.
+    pub async fn add_transport(&self, param: &EnteredLoginParam) -> Result<()> {
+        self.stop_io().await;
+        let result = self.add_transport_inner(param).await;
+        if result.is_err() {
+            if let Ok(true) = self.is_configured().await {
+                self.start_io().await;
+            }
+            return result;
+        }
+        self.start_io().await;
+        Ok(())
+    }
+
+    async fn add_transport_inner(&self, param: &EnteredLoginParam) -> Result<()> {
         ensure!(
             !self.scheduler.is_running().await,
             "cannot configure, already running"
@@ -74,42 +127,63 @@ impl Context {
             self.sql.is_open().await,
             "cannot configure, database not opened."
         );
+        let old_addr = self.get_config(Config::ConfiguredAddr).await?;
+        if self.is_configured().await? && !addr_cmp(&old_addr.unwrap_or_default(), &param.addr) {
+            bail!("Adding a new transport is not supported right now. Check back in a few months!");
+        }
         let cancel_channel = self.alloc_ongoing().await?;
 
         let res = self
-            .inner_configure()
+            .inner_configure(param)
             .race(cancel_channel.recv().map(|_| Err(format_err!("Cancelled"))))
             .await;
 
         self.free_ongoing().await;
 
         if let Err(err) = res.as_ref() {
-            progress!(
+            // We are using Anyhow's .context() and to show the
-                self,
+            // inner error, too, we need the {:#}:
-                0,
+            let error_msg = stock_str::configuration_failed(self, &format!("{err:#}")).await;
-                Some(
+            progress!(self, 0, Some(error_msg));
-                    stock_str::configuration_failed(
-                        self,
-                        // We are using Anyhow's .context() and to show the
-                        // inner error, too, we need the {:#}:
-                        &format!("{err:#}"),
-                    )
-                    .await
-                )
-            );
         } else {
+            param.save(self).await?;
             progress!(self, 1000);
         }
 
         res
     }
 
-    async fn inner_configure(&self) -> Result<()> {
+    /// Adds a new email account as a transport
+    /// using the server encoded in the QR code.
+    /// See [Self::add_transport].
+    pub async fn add_transport_from_qr(&self, qr: &str) -> Result<()> {
+        set_account_from_qr(self, qr).await?;
+        self.configure().await?;
+
+        Ok(())
+    }
+
+    /// Returns the list of all email accounts that are used as a transport in the current profile.
+    /// Use [Self::add_transport()] to add or change a transport
+    /// and [Self::delete_transport()] to delete a transport.
+    pub async fn list_transports(&self) -> Result<Vec<EnteredLoginParam>> {
+        let param = EnteredLoginParam::load(self).await?;
+
+        Ok(vec![param])
+    }
+
+    /// Removes the transport with the specified email address
+    /// (i.e. [EnteredLoginParam::addr]).
+    #[expect(clippy::unused_async)]
+    pub async fn delete_transport(&self, _addr: &str) -> Result<()> {
+        bail!("Adding and removing additional transports is not supported yet. Check back in a few months!")
+    }
+
+    async fn inner_configure(&self, param: &EnteredLoginParam) -> Result<()> {
         info!(self, "Configure ...");
 
-        let param = EnteredLoginParam::load(self).await?;
         let old_addr = self.get_config(Config::ConfiguredAddr).await?;
-        let configured_param = configure(self, &param).await?;
+        let configured_param = configure(self, param).await?;
         self.set_config_internal(Config::NotifyAboutWrongPw, Some("1"))
             .await?;
         on_configure_completed(self, configured_param, old_addr).await?;
@@ -185,8 +259,7 @@ async fn get_configured_param(
         param.smtp.password.clone()
     };
 
-    let proxy_config = param.proxy_config.clone();
+    let proxy_enabled = ctx.get_config_bool(Config::ProxyEnabled).await?;
-    let proxy_enabled = proxy_config.is_some();
 
     let mut addr = param.addr.clone();
     if param.oauth2 {
@@ -345,7 +418,7 @@ async fn get_configured_param(
             .collect(),
         smtp_user: param.smtp.user.clone(),
         smtp_password,
-        proxy_config: param.proxy_config.clone(),
+        proxy_config: ProxyConfig::load(ctx).await?,
         provider,
         certificate_checks: match param.certificate_checks {
             EnteredCertificateChecks::Automatic => ConfiguredCertificateChecks::Automatic,

src/lib.rs

@@ -68,7 +68,7 @@ mod imap;
 pub mod imex;
 pub mod key;
 pub mod location;
-mod login_param;
+pub mod login_param;
 pub mod message;
 mod mimefactory;
 pub mod mimeparser;

src/login_param.rs

@@ -4,6 +4,7 @@ use std::fmt;
 
 use anyhow::{format_err, Context as _, Result};
 use deltachat_contact_tools::EmailAddress;
+use num_traits::ToPrimitive as _;
 use serde::{Deserialize, Serialize};
 
 use crate::config::Config;
@@ -11,9 +12,11 @@ use crate::configure::server_params::{expand_param_vector, ServerParams};
 use crate::constants::{DC_LP_AUTH_FLAGS, DC_LP_AUTH_NORMAL, DC_LP_AUTH_OAUTH2};
 use crate::context::Context;
 use crate::net::load_connection_timestamp;
-use crate::net::proxy::ProxyConfig;
+pub use crate::net::proxy::ProxyConfig;
-use crate::provider::{Protocol, Provider, Socket, UsernamePattern};
+pub use crate::provider::Socket;
+use crate::provider::{Protocol, Provider, UsernamePattern};
 use crate::sql::Sql;
+use crate::tools::ToOption;
 
 /// User-entered setting for certificate checks.
 ///
@@ -44,7 +47,7 @@ pub enum EnteredCertificateChecks {
 #[derive(Copy, Clone, Debug, Display, FromPrimitive, ToPrimitive, PartialEq, Eq)]
 #[repr(u32)]
 #[strum(serialize_all = "snake_case")]
-pub enum ConfiguredCertificateChecks {
+pub(crate) enum ConfiguredCertificateChecks {
     /// Use configuration from the provider database.
     /// If there is no provider database setting for certificate checks,
     /// accept invalid certificates.
@@ -116,15 +119,13 @@ pub struct EnteredLoginParam {
     /// invalid hostnames
     pub certificate_checks: EnteredCertificateChecks,
 
-    /// Proxy configuration.
+    /// If true, login via OAUTH2 (not recommended anymore)
-    pub proxy_config: Option<ProxyConfig>,
-
     pub oauth2: bool,
 }
 
 impl EnteredLoginParam {
     /// Loads entered account settings.
-    pub async fn load(context: &Context) -> Result<Self> {
+    pub(crate) async fn load(context: &Context) -> Result<Self> {
         let addr = context
             .get_config(Config::Addr)
             .await?
@@ -196,8 +197,6 @@ impl EnteredLoginParam {
             .unwrap_or_default();
         let oauth2 = matches!(server_flags & DC_LP_AUTH_FLAGS, DC_LP_AUTH_OAUTH2);
 
-        let proxy_config = ProxyConfig::load(context).await?;
-
         Ok(EnteredLoginParam {
             addr,
             imap: EnteredServerLoginParam {
@@ -215,10 +214,71 @@ impl EnteredLoginParam {
                 password: send_pw,
             },
             certificate_checks,
-            proxy_config,
             oauth2,
         })
     }
+
+    /// Saves entered account settings,
+    /// so that they can be prefilled if the user wants to configure the server again.
+    pub(crate) async fn save(&self, context: &Context) -> Result<()> {
+        context.set_config(Config::Addr, Some(&self.addr)).await?;
+
+        context
+            .set_config(Config::MailServer, self.imap.server.to_option())
+            .await?;
+        context
+            .set_config(Config::MailPort, self.imap.port.to_option().as_deref())
+            .await?;
+        context
+            .set_config(
+                Config::MailSecurity,
+                self.imap.security.to_i32().to_option().as_deref(),
+            )
+            .await?;
+        context
+            .set_config(Config::MailUser, self.imap.user.to_option())
+            .await?;
+        context
+            .set_config(Config::MailPw, self.imap.password.to_option())
+            .await?;
+
+        context
+            .set_config(Config::SendServer, self.smtp.server.to_option())
+            .await?;
+        context
+            .set_config(Config::SendPort, self.smtp.port.to_option().as_deref())
+            .await?;
+        context
+            .set_config(
+                Config::SendSecurity,
+                self.smtp.security.to_i32().to_option().as_deref(),
+            )
+            .await?;
+        context
+            .set_config(Config::SendUser, self.smtp.user.to_option())
+            .await?;
+        context
+            .set_config(Config::SendPw, self.smtp.password.to_option())
+            .await?;
+
+        context
+            .set_config(
+                Config::ImapCertificateChecks,
+                self.certificate_checks.to_i32().to_option().as_deref(),
+            )
+            .await?;
+
+        let server_flags = if self.oauth2 {
+            Some(DC_LP_AUTH_OAUTH2.to_string())
+        } else {
+            None
+        };
+        context
+            .set_config(Config::ServerFlags, server_flags.as_deref())
+            .await?;
+
+        Ok(())
+    }
 }
 
 impl fmt::Display for EnteredLoginParam {
@@ -319,7 +379,7 @@ impl TryFrom<Socket> for ConnectionSecurity {
 }
 
 #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
-pub struct ConfiguredServerLoginParam {
+pub(crate) struct ConfiguredServerLoginParam {
     pub connection: ConnectionCandidate,
 
     /// Username.
@@ -357,7 +417,7 @@ pub(crate) async fn prioritize_server_login_params(
 /// Login parameters saved to the database
 /// after successful configuration.
 #[derive(Debug, Clone, PartialEq, Eq)]
-pub struct ConfiguredLoginParam {
+pub(crate) struct ConfiguredLoginParam {
     /// `From:` address that was used at the time of configuration.
     pub addr: String,
 
@@ -390,6 +450,7 @@ pub struct ConfiguredLoginParam {
     /// invalid hostnames
     pub certificate_checks: ConfiguredCertificateChecks,
 
+    /// If true, login via OAUTH2 (not recommended anymore)
     pub oauth2: bool,
 }
 
@@ -428,7 +489,7 @@ impl ConfiguredLoginParam {
     /// Load configured account settings from the database.
     ///
     /// Returns `None` if account is not configured.
-    pub async fn load(context: &Context) -> Result<Option<Self>> {
+    pub(crate) async fn load(context: &Context) -> Result<Option<Self>> {
         if !context.get_config_bool(Config::Configured).await? {
             return Ok(None);
         }
@@ -699,7 +760,7 @@ impl ConfiguredLoginParam {
     }
 
     /// Save this loginparam to the database.
-    pub async fn save_as_configured_params(&self, context: &Context) -> Result<()> {
+    pub(crate) async fn save_as_configured_params(&self, context: &Context) -> Result<()> {
         context.set_primary_self_addr(&self.addr).await?;
 
         context
@@ -776,7 +837,7 @@ impl ConfiguredLoginParam {
         Ok(())
     }
 
-    pub fn strict_tls(&self) -> bool {
+    pub(crate) fn strict_tls(&self) -> bool {
         let provider_strict_tls = self.provider.map(|provider| provider.opt.strict_tls);
         match self.certificate_checks {
             ConfiguredCertificateChecks::OldAutomatic => {
@@ -839,6 +900,42 @@ mod tests {
         Ok(())
     }
 
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_save_entered_login_param() -> Result<()> {
+        let t = TestContext::new().await;
+        let param = EnteredLoginParam {
+            addr: "alice@example.org".to_string(),
+            imap: EnteredServerLoginParam {
+                server: "".to_string(),
+                port: 0,
+                security: Socket::Starttls,
+                user: "".to_string(),
+                password: "foobar".to_string(),
+            },
+            smtp: EnteredServerLoginParam {
+                server: "".to_string(),
+                port: 2947,
+                security: Socket::default(),
+                user: "".to_string(),
+                password: "".to_string(),
+            },
+            certificate_checks: Default::default(),
+            oauth2: false,
+        };
+        param.save(&t).await?;
+        assert_eq!(
+            t.get_config(Config::Addr).await?.unwrap(),
+            "alice@example.org"
+        );
+        assert_eq!(t.get_config(Config::MailPw).await?.unwrap(), "foobar");
+        assert_eq!(t.get_config(Config::SendPw).await?, None);
+        assert_eq!(t.get_config_int(Config::SendPort).await?, 2947);
+
+        assert_eq!(EnteredLoginParam::load(&t).await?, param);
+
+        Ok(())
+    }
+
     #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
     async fn test_save_load_login_param() -> Result<()> {
         let t = TestContext::new().await;

src/net/proxy.rs

@@ -154,18 +154,21 @@ impl Socks5Config {
     }
 }
 
+/// Configuration for the proxy through which all traffic
+/// (except for iroh p2p connections)
+/// will be sent.
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub enum ProxyConfig {
-    // HTTP proxy.
+    /// HTTP proxy.
     Http(HttpConfig),
 
-    // HTTPS proxy.
+    /// HTTPS proxy.
     Https(HttpConfig),
 
-    // SOCKS5 proxy.
+    /// SOCKS5 proxy.
     Socks5(Socks5Config),
 
-    // Shadowsocks proxy.
+    /// Shadowsocks proxy.
     Shadowsocks(ShadowsocksConfig),
 }
 
@@ -246,7 +249,7 @@ where
 
 impl ProxyConfig {
     /// Creates a new proxy configuration by parsing given proxy URL.
-    pub(crate) fn from_url(url: &str) -> Result<Self> {
+    pub fn from_url(url: &str) -> Result<Self> {
         let url = Url::parse(url).context("Cannot parse proxy URL")?;
         match url.scheme() {
             "http" => {
@@ -305,7 +308,7 @@ impl ProxyConfig {
     ///
     /// This function can be used to normalize proxy URL
     /// by parsing it and serializing back.
-    pub(crate) fn to_url(&self) -> String {
+    pub fn to_url(&self) -> String {
         match self {
             Self::Http(http_config) => http_config.to_url("http"),
             Self::Https(http_config) => http_config.to_url("https"),
@@ -391,7 +394,7 @@ impl ProxyConfig {
 
     /// If `load_dns_cache` is true, loads cached DNS resolution results.
     /// Use this only if the connection is going to be protected with TLS checks.
-    pub async fn connect(
+    pub(crate) async fn connect(
         &self,
         context: &Context,
         target_host: &str,

src/qr.rs

@@ -695,7 +695,7 @@ struct CreateAccountErrorResponse {
 /// take a qr of the type DC_QR_ACCOUNT, parse it's parameters,
 /// download additional information from the contained url and set the parameters.
 /// on success, a configure::configure() should be able to log in to the account
-async fn set_account_from_qr(context: &Context, qr: &str) -> Result<()> {
+pub(crate) async fn set_account_from_qr(context: &Context, qr: &str) -> Result<()> {
     let url_str = qr
         .get(DCACCOUNT_SCHEME.len()..)
         .context("Invalid DCACCOUNT scheme")?;

src/tools.rs

@@ -603,6 +603,36 @@ where
     }
 }
 
+pub(crate) trait ToOption<T> {
+    fn to_option(self) -> Option<T>;
+}
+impl<'a> ToOption<&'a str> for &'a String {
+    fn to_option(self) -> Option<&'a str> {
+        if self.is_empty() {
+            None
+        } else {
+            Some(self)
+        }
+    }
+}
+impl ToOption<String> for u16 {
+    fn to_option(self) -> Option<String> {
+        if self == 0 {
+            None
+        } else {
+            Some(self.to_string())
+        }
+    }
+}
+impl ToOption<String> for Option<i32> {
+    fn to_option(self) -> Option<String> {
+        match self {
+            None | Some(0) => None,
+            Some(v) => Some(v.to_string()),
+        }
+    }
+}
+
 pub fn remove_subject_prefix(last_subject: &str) -> String {
     let subject_start = if last_subject.starts_with("Chat:") {
         0