api: add ChatListChanged and ChatListItemChanged events (#4476)

deltachat-ffi/deltachat.h

@@ -6213,7 +6213,24 @@ void dc_event_unref(dc_event_t* event);
  * This event is only emitted by the account manager
  */
 
-#define DC_EVENT_ACCOUNTS_BACKGROUND_FETCH_DONE  2200
+#define DC_EVENT_ACCOUNTS_BACKGROUND_FETCH_DONE   2200
+
+/**
+ * Inform that set of chats or the order of the chats in the chatlist has changed.
+ *
+ * Sometimes this is emitted together with `DC_EVENT_CHATLIST_ITEM_CHANGED`.
+ */
+
+#define DC_EVENT_CHATLIST_CHANGED              2300
+
+/**
+ * Inform that all or a single chat list item changed and needs to be rerendered
+ * If `chat_id` is set to 0, then all currently visible chats need to be rerendered, and all not-visible items need to be cleared from cache if the UI has a cache.
+ * 
+ * @param data1 (int) chat_id chat id of chatlist item to be rerendered, if chat_id = 0 all (cached & visible) items need to be rerendered
+ */
+
+#define DC_EVENT_CHATLIST_ITEM_CHANGED         2301
 
 /**
  * @}

deltachat-ffi/src/lib.rs

@@ -564,6 +564,8 @@ pub unsafe extern "C" fn dc_event_get_id(event: *mut dc_event_t) -> libc::c_int
         EventType::WebxdcStatusUpdate { .. } => 2120,
         EventType::WebxdcInstanceDeleted { .. } => 2121,
         EventType::AccountsBackgroundFetchDone => 2200,
+        EventType::ChatlistChanged => 2300,
+        EventType::ChatlistItemChanged { .. } => 2301,
     }
 }
 
@@ -593,6 +595,7 @@ pub unsafe extern "C" fn dc_event_get_data1_int(event: *mut dc_event_t) -> libc:
         | EventType::IncomingMsgBunch { .. }
         | EventType::ErrorSelfNotInGroup(_)
         | EventType::AccountsBackgroundFetchDone => 0,
+        EventType::ChatlistChanged => 0,
         EventType::MsgsChanged { chat_id, .. }
         | EventType::ReactionsChanged { chat_id, .. }
         | EventType::IncomingMsg { chat_id, .. }
@@ -617,6 +620,9 @@ pub unsafe extern "C" fn dc_event_get_data1_int(event: *mut dc_event_t) -> libc:
         }
         EventType::WebxdcStatusUpdate { msg_id, .. } => msg_id.to_u32() as libc::c_int,
         EventType::WebxdcInstanceDeleted { msg_id, .. } => msg_id.to_u32() as libc::c_int,
+        EventType::ChatlistItemChanged { chat_id } => {
+            chat_id.unwrap_or_default().to_u32() as libc::c_int
+        }
     }
 }
 
@@ -653,6 +659,8 @@ pub unsafe extern "C" fn dc_event_get_data2_int(event: *mut dc_event_t) -> libc:
         | EventType::IncomingMsgBunch { .. }
         | EventType::SelfavatarChanged
         | EventType::AccountsBackgroundFetchDone
+        | EventType::ChatlistChanged
+        | EventType::ChatlistItemChanged { .. }
         | EventType::ConfigSynced { .. } => 0,
         EventType::ChatModified(_) => 0,
         EventType::MsgsChanged { msg_id, .. }
@@ -717,7 +725,9 @@ pub unsafe extern "C" fn dc_event_get_data2_str(event: *mut dc_event_t) -> *mut
         | EventType::WebxdcInstanceDeleted { .. }
         | EventType::AccountsBackgroundFetchDone
         | EventType::ChatEphemeralTimerModified { .. }
-        | EventType::IncomingMsgBunch { .. } => ptr::null_mut(),
+        | EventType::IncomingMsgBunch { .. }
+        | EventType::ChatlistItemChanged { .. }
+        | EventType::ChatlistChanged => ptr::null_mut(),
         EventType::ConfigureProgress { comment, .. } => {
             if let Some(comment) = comment {
                 comment.to_c_string().unwrap_or_default().into_raw()

deltachat-jsonrpc/src/api.rs

@@ -1626,6 +1626,9 @@ impl CommandApi {
     /// the current device.
     ///
     /// Can be cancelled by stopping the ongoing process.
+    ///
+    /// Do not forget to call start_io on the account after a successful import,
+    /// otherwise it will not connect to the email server.
     async fn get_backup(&self, account_id: u32, qr_text: String) -> Result<()> {
         let ctx = self.get_context(account_id).await?;
         let qr = qr::check_qr(&ctx, &qr_text).await?;

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

@@ -250,6 +250,15 @@ pub enum EventType {
     ///
     /// This event is only emitted by the account manager
     AccountsBackgroundFetchDone,
+    /// Inform that set of chats or the order of the chats in the chatlist has changed.
+    ///
+    /// Sometimes this is emitted together with `UIChatlistItemChanged`.
+    ChatlistChanged,
+
+    /// Inform that a single chat list item changed and needs to be rerendered.
+    /// If `chat_id` is set to None, then all currently visible chats need to be rerendered, and all not-visible items need to be cleared from cache if the UI has a cache.
+    #[serde(rename_all = "camelCase")]
+    ChatlistItemChanged { chat_id: Option<u32> },
 }
 
 impl From<CoreEventType> for EventType {
@@ -357,6 +366,10 @@ impl From<CoreEventType> for EventType {
                 msg_id: msg_id.to_u32(),
             },
             CoreEventType::AccountsBackgroundFetchDone => AccountsBackgroundFetchDone,
+            CoreEventType::ChatlistItemChanged { chat_id } => ChatlistItemChanged {
+                chat_id: chat_id.map(|id| id.to_u32()),
+            },
+            CoreEventType::ChatlistChanged => ChatlistChanged,
         }
     }
 }

deltachat-rpc-client/src/deltachat_rpc_client/account.py

@@ -30,6 +30,10 @@ class Account:
         """Wait until the next event and return it."""
         return AttrDict(self._rpc.wait_for_event(self.id))
 
+    def clear_all_events(self):
+        """Removes all queued-up events for a given account. Useful for tests."""
+        self._rpc.clear_all_events(self.id)
+
     def remove(self) -> None:
         """Remove the account."""
         self._rpc.remove_account(self.id)

deltachat-rpc-client/src/deltachat_rpc_client/const.py

@@ -59,6 +59,8 @@ class EventType(str, Enum):
     SELFAVATAR_CHANGED = "SelfavatarChanged"
     WEBXDC_STATUS_UPDATE = "WebxdcStatusUpdate"
     WEBXDC_INSTANCE_DELETED = "WebxdcInstanceDeleted"
+    CHATLIST_CHANGED = "ChatlistChanged"
+    CHATLIST_ITEM_CHANGED = "ChatlistItemChanged"
 
 
 class ChatId(IntEnum):

deltachat-rpc-client/src/deltachat_rpc_client/rpc.py

@@ -6,7 +6,7 @@ import logging
 import os
 import subprocess
 import sys
-from queue import Queue
+from queue import Empty, Queue
 from threading import Event, Thread
 from typing import Any, Iterator, Optional
 
@@ -188,5 +188,14 @@ class Rpc:
         queue = self.get_queue(account_id)
         return queue.get()
 
+    def clear_all_events(self, account_id: int):
+        """Removes all queued-up events for a given account. Useful for tests."""
+        queue = self.get_queue(account_id)
+        try:
+            while True:
+                queue.get_nowait()
+        except Empty:
+            pass
+
     def __getattr__(self, attr: str):
         return RpcMethod(self, attr)

deltachat-rpc-client/tests/test_chatlist_events.py

@@ -0,0 +1,218 @@
+from __future__ import annotations
+
+import base64
+import os
+from typing import TYPE_CHECKING
+
+from deltachat_rpc_client import Account, EventType, const
+
+if TYPE_CHECKING:
+    from deltachat_rpc_client.pytestplugin import ACFactory
+
+
+def wait_for_chatlist_and_specific_item(account, chat_id):
+    first_event = ""
+    while True:
+        event = account.wait_for_event()
+        if event.kind == EventType.CHATLIST_CHANGED:
+            first_event = "change"
+            break
+        if event.kind == EventType.CHATLIST_ITEM_CHANGED and event.chat_id == chat_id:
+            first_event = "item_change"
+            break
+    while True:
+        event = account.wait_for_event()
+        if event.kind == EventType.CHATLIST_CHANGED and first_event == "item_change":
+            break
+        if event.kind == EventType.CHATLIST_ITEM_CHANGED and event.chat_id == chat_id and first_event == "change":
+            break
+
+
+def wait_for_chatlist_specific_item(account, chat_id):
+    while True:
+        event = account.wait_for_event()
+        if event.kind == EventType.CHATLIST_ITEM_CHANGED and event.chat_id == chat_id:
+            break
+
+
+def wait_for_chatlist(account):
+    while True:
+        event = account.wait_for_event()
+        if event.kind == EventType.CHATLIST_CHANGED:
+            break
+
+
+def test_delivery_status(acfactory: ACFactory) -> None:
+    """
+    Test change status on chatlistitem when status changes (delivered, read)
+    """
+    alice, bob = acfactory.get_online_accounts(2)
+
+    bob_addr = bob.get_config("addr")
+    alice_contact_bob = alice.create_contact(bob_addr, "Bob")
+    alice_chat_bob = alice_contact_bob.create_chat()
+
+    alice.clear_all_events()
+    bob.stop_io()
+    alice.stop_io()
+    alice_chat_bob.send_text("hi")
+    wait_for_chatlist_and_specific_item(alice, chat_id=alice_chat_bob.id)
+
+    alice.clear_all_events()
+    alice.start_io()
+    wait_for_chatlist_specific_item(alice, chat_id=alice_chat_bob.id)
+
+    bob.clear_all_events()
+    bob.start_io()
+
+    event = bob.wait_for_incoming_msg_event()
+    msg = bob.get_message_by_id(event.msg_id)
+    msg.get_snapshot().chat.accept()
+    msg.mark_seen()
+
+    chat_item = alice._rpc.get_chatlist_items_by_entries(alice.id, [alice_chat_bob.id])[str(alice_chat_bob.id)]
+    assert chat_item["summaryStatus"] == const.MessageState.OUT_DELIVERED
+
+    alice.clear_all_events()
+
+    while True:
+        event = alice.wait_for_event()
+        if event.kind == EventType.MSG_READ:
+            break
+
+    wait_for_chatlist_specific_item(alice, chat_id=alice_chat_bob.id)
+    chat_item = alice._rpc.get_chatlist_items_by_entries(alice.id, [alice_chat_bob.id])[str(alice_chat_bob.id)]
+    assert chat_item["summaryStatus"] == const.MessageState.OUT_MDN_RCVD
+
+
+def test_delivery_status_failed(acfactory: ACFactory) -> None:
+    """
+    Test change status on chatlistitem when status changes failed
+    """
+    (alice,) = acfactory.get_online_accounts(1)
+
+    invalid_contact = alice.create_contact("example@example.com", "invalid address")
+    invalid_chat = alice.get_chat_by_id(alice._rpc.create_chat_by_contact_id(alice.id, invalid_contact.id))
+
+    alice.clear_all_events()
+
+    failing_message = invalid_chat.send_text("test")
+
+    wait_for_chatlist_and_specific_item(alice, invalid_chat.id)
+
+    assert failing_message.get_snapshot().state == const.MessageState.OUT_PENDING
+
+    while True:
+        event = alice.wait_for_event()
+        if event.kind == EventType.MSG_FAILED:
+            break
+
+    wait_for_chatlist_specific_item(alice, invalid_chat.id)
+
+    assert failing_message.get_snapshot().state == const.MessageState.OUT_FAILED
+
+
+def test_download_on_demand(acfactory: ACFactory) -> None:
+    """
+    Test if download on demand emits chatlist update events.
+    This is only needed for last message in chat, but finding that out is too expensive, so it's always emitted
+    """
+    alice, bob = acfactory.get_online_accounts(2)
+
+    bob_addr = bob.get_config("addr")
+    alice_contact_bob = alice.create_contact(bob_addr, "Bob")
+    alice_chat_bob = alice_contact_bob.create_chat()
+    alice_chat_bob.send_text("hi")
+
+    alice.set_config("download_limit", "1")
+
+    event = bob.wait_for_incoming_msg_event()
+    msg = bob.get_message_by_id(event.msg_id)
+    chat_id = msg.get_snapshot().chat_id
+    msg.get_snapshot().chat.accept()
+    bob.get_chat_by_id(chat_id).send_message(
+        "Hello World, this message is bigger than 5 bytes",
+        html=base64.b64encode(os.urandom(300000)).decode("utf-8"),
+    )
+
+    msg_id = alice.wait_for_incoming_msg_event().msg_id
+
+    assert alice.get_message_by_id(msg_id).get_snapshot().download_state == const.DownloadState.AVAILABLE
+
+    alice.clear_all_events()
+    chat_id = alice.get_message_by_id(msg_id).get_snapshot().chat_id
+    alice._rpc.download_full_message(alice.id, msg_id)
+
+    wait_for_chatlist_specific_item(alice, chat_id)
+
+
+def get_multi_account_test_setup(acfactory: ACFactory) -> [Account, Account, Account]:
+    alice, bob = acfactory.get_online_accounts(2)
+
+    bob_addr = bob.get_config("addr")
+    alice_contact_bob = alice.create_contact(bob_addr, "Bob")
+    alice_chat_bob = alice_contact_bob.create_chat()
+    alice_chat_bob.send_text("hi")
+
+    bob.wait_for_incoming_msg_event()
+
+    alice_second_device: Account = acfactory.get_unconfigured_account()
+
+    alice._rpc.provide_backup.future(alice.id)
+    backup_code = alice._rpc.get_backup_qr(alice.id)
+    alice_second_device._rpc.get_backup(alice_second_device.id, backup_code)
+    alice_second_device.start_io()
+    alice.clear_all_events()
+    alice_second_device.clear_all_events()
+    bob.clear_all_events()
+    return [alice, alice_second_device, bob, alice_chat_bob]
+
+
+def test_imap_sync_seen_msgs(acfactory: ACFactory) -> None:
+    """
+    Test that chatlist changed events are emitted for the second device
+    when the message is marked as read on the first device
+    """
+    alice, alice_second_device, bob, alice_chat_bob = get_multi_account_test_setup(acfactory)
+
+    alice_chat_bob.send_text("hello")
+
+    event = bob.wait_for_incoming_msg_event()
+    msg = bob.get_message_by_id(event.msg_id)
+    bob_chat_id = msg.get_snapshot().chat_id
+    msg.get_snapshot().chat.accept()
+
+    alice.clear_all_events()
+    alice_second_device.clear_all_events()
+    bob.get_chat_by_id(bob_chat_id).send_text("hello")
+
+    # make sure alice_second_device already received the message
+    alice_second_device.wait_for_incoming_msg_event()
+
+    event = alice.wait_for_incoming_msg_event()
+    msg = alice.get_message_by_id(event.msg_id)
+    alice_second_device.clear_all_events()
+    msg.mark_seen()
+
+    wait_for_chatlist_specific_item(bob, bob_chat_id)
+    wait_for_chatlist_specific_item(alice, alice_chat_bob.id)
+
+
+def test_multidevice_sync_chat(acfactory: ACFactory) -> None:
+    """
+    Test multidevice sync: syncing chat visibility and muting across multiple devices
+    """
+    alice, alice_second_device, bob, alice_chat_bob = get_multi_account_test_setup(acfactory)
+
+    alice_chat_bob.archive()
+    wait_for_chatlist_specific_item(alice_second_device, alice_chat_bob.id)
+    assert alice_second_device.get_chat_by_id(alice_chat_bob.id).get_basic_snapshot().archived
+
+    alice_second_device.clear_all_events()
+    alice_chat_bob.pin()
+    wait_for_chatlist_specific_item(alice_second_device, alice_chat_bob.id)
+
+    alice_second_device.clear_all_events()
+    alice_chat_bob.mute()
+    wait_for_chatlist_specific_item(alice_second_device, alice_chat_bob.id)
+    assert alice_second_device.get_chat_by_id(alice_chat_bob.id).get_basic_snapshot().is_muted

node/constants.js

@@ -30,6 +30,8 @@ module.exports = {
   DC_DOWNLOAD_IN_PROGRESS: 1000,
   DC_DOWNLOAD_UNDECIPHERABLE: 30,
   DC_EVENT_ACCOUNTS_BACKGROUND_FETCH_DONE: 2200,
+  DC_EVENT_CHATLIST_CHANGED: 2300,
+  DC_EVENT_CHATLIST_ITEM_CHANGED: 2301,
   DC_EVENT_CHAT_EPHEMERAL_TIMER_MODIFIED: 2021,
   DC_EVENT_CHAT_MODIFIED: 2020,
   DC_EVENT_CONFIGURE_PROGRESS: 2041,

node/events.js

@@ -37,5 +37,7 @@ module.exports = {
   2111: 'DC_EVENT_CONFIG_SYNCED',
   2120: 'DC_EVENT_WEBXDC_STATUS_UPDATE',
   2121: 'DC_EVENT_WEBXDC_INSTANCE_DELETED',
-  2200: 'DC_EVENT_ACCOUNTS_BACKGROUND_FETCH_DONE'
+  2200: 'DC_EVENT_ACCOUNTS_BACKGROUND_FETCH_DONE',
+  2300: 'DC_EVENT_CHATLIST_CHANGED',
+  2301: 'DC_EVENT_CHATLIST_ITEM_CHANGED'
 }

node/lib/constants.ts

@@ -30,6 +30,8 @@ export enum C {
   DC_DOWNLOAD_IN_PROGRESS = 1000,
   DC_DOWNLOAD_UNDECIPHERABLE = 30,
   DC_EVENT_ACCOUNTS_BACKGROUND_FETCH_DONE = 2200,
+  DC_EVENT_CHATLIST_CHANGED = 2300,
+  DC_EVENT_CHATLIST_ITEM_CHANGED = 2301,
   DC_EVENT_CHAT_EPHEMERAL_TIMER_MODIFIED = 2021,
   DC_EVENT_CHAT_MODIFIED = 2020,
   DC_EVENT_CONFIGURE_PROGRESS = 2041,
@@ -333,4 +335,6 @@ export const EventId2EventName: { [key: number]: string } = {
   2120: 'DC_EVENT_WEBXDC_STATUS_UPDATE',
   2121: 'DC_EVENT_WEBXDC_INSTANCE_DELETED',
   2200: 'DC_EVENT_ACCOUNTS_BACKGROUND_FETCH_DONE',
+  2300: 'DC_EVENT_CHATLIST_CHANGED',
+  2301: 'DC_EVENT_CHATLIST_ITEM_CHANGED',
 }

src/chat.rs

@@ -15,6 +15,7 @@ use strum_macros::EnumIter;
 use crate::aheader::EncryptPreference;
 use crate::blob::BlobObject;
 use crate::chatlist::Chatlist;
+use crate::chatlist_events;
 use crate::color::str_to_color;
 use crate::config::Config;
 use crate::constants::{
@@ -295,6 +296,8 @@ impl ChatId {
             }
         };
         context.emit_msgs_changed_without_ids();
+        chatlist_events::emit_chatlist_changed(context);
+        chatlist_events::emit_chatlist_item_changed(context, chat_id);
         Ok(chat_id)
     }
 
@@ -411,6 +414,7 @@ impl ChatId {
                 }
             }
         }
+        chatlist_events::emit_chatlist_changed(context);
 
         if sync.into() {
             // NB: For a 1:1 chat this currently triggers `Contact::block()` on other devices.
@@ -433,6 +437,8 @@ impl ChatId {
     pub(crate) async fn unblock_ex(self, context: &Context, sync: sync::Sync) -> Result<()> {
         self.set_blocked(context, Blocked::Not).await?;
 
+        chatlist_events::emit_chatlist_changed(context);
+
         if sync.into() {
             let chat = Chat::load_from_db(context, self).await?;
             // TODO: For a 1:1 chat this currently triggers `Contact::unblock()` on other devices.
@@ -443,6 +449,7 @@ impl ChatId {
                 .log_err(context)
                 .ok();
         }
+
         Ok(())
     }
 
@@ -486,6 +493,7 @@ impl ChatId {
 
         if self.set_blocked(context, Blocked::Not).await? {
             context.emit_event(EventType::ChatModified(self));
+            chatlist_events::emit_chatlist_item_changed(context, self);
         }
 
         if sync.into() {
@@ -528,6 +536,7 @@ impl ChatId {
             .await?;
 
         context.emit_event(EventType::ChatModified(self));
+        chatlist_events::emit_chatlist_item_changed(context, self);
 
         // make sure, the receivers will get all keys
         self.reset_gossiped_timestamp(context).await?;
@@ -576,6 +585,7 @@ impl ChatId {
                 if protection_status_modified {
                     self.add_protection_msg(context, protect, contact_id, timestamp_sort)
                         .await?;
+                    chatlist_events::emit_chatlist_item_changed(context, self);
                 }
                 Ok(())
             }
@@ -662,6 +672,8 @@ impl ChatId {
             .await?;
 
         context.emit_msgs_changed_without_ids();
+        chatlist_events::emit_chatlist_changed(context);
+        chatlist_events::emit_chatlist_item_changed(context, self);
 
         if sync.into() {
             let chat = Chat::load_from_db(context, self).await?;
@@ -768,6 +780,7 @@ impl ChatId {
             .await?;
 
         context.emit_msgs_changed_without_ids();
+        chatlist_events::emit_chatlist_changed(context);
 
         context
             .set_config_internal(Config::LastHousekeeping, None)
@@ -779,6 +792,7 @@ impl ChatId {
             msg.text = stock_str::self_deleted_msg_body(context).await;
             add_device_msg(context, None, Some(&mut msg)).await?;
         }
+        chatlist_events::emit_chatlist_changed(context);
 
         Ok(())
     }
@@ -3103,7 +3117,9 @@ pub async fn marknoticed_chat(context: &Context, chat_id: ChatId) -> Result<()>
             .await?;
         for chat_id_in_archive in chat_ids_in_archive {
             context.emit_event(EventType::MsgsNoticed(chat_id_in_archive));
+            chatlist_events::emit_chatlist_item_changed(context, chat_id_in_archive);
         }
+        chatlist_events::emit_chatlist_item_changed(context, DC_CHAT_ID_ARCHIVED_LINK);
     } else {
         let exists = context
             .sql
@@ -3130,6 +3146,7 @@ pub async fn marknoticed_chat(context: &Context, chat_id: ChatId) -> Result<()>
     }
 
     context.emit_event(EventType::MsgsNoticed(chat_id));
+    chatlist_events::emit_chatlist_item_changed(context, chat_id);
 
     Ok(())
 }
@@ -3197,6 +3214,7 @@ pub(crate) async fn mark_old_messages_as_noticed(
 
     for c in changed_chats {
         context.emit_event(EventType::MsgsNoticed(c));
+        chatlist_events::emit_chatlist_item_changed(context, c);
     }
 
     Ok(())
@@ -3359,6 +3377,8 @@ pub async fn create_group_chat(
     }
 
     context.emit_msgs_changed_without_ids();
+    chatlist_events::emit_chatlist_changed(context);
+    chatlist_events::emit_chatlist_item_changed(context, chat_id);
 
     if protect == ProtectionStatus::Protected {
         chat_id
@@ -3446,11 +3466,14 @@ pub(crate) async fn create_broadcast_list_ex(
     let chat_id = ChatId::new(u32::try_from(row_id)?);
 
     context.emit_msgs_changed_without_ids();
+    chatlist_events::emit_chatlist_changed(context);
+
     if sync.into() {
         let id = SyncId::Grpid(grpid);
         let action = SyncAction::CreateBroadcast(chat_name);
         self::sync(context, id, action).await.log_err(context).ok();
     }
+
     Ok(chat_id)
 }
 
@@ -3721,6 +3744,7 @@ pub(crate) async fn set_muted_ex(
         .await
         .context(format!("Failed to set mute duration for {chat_id}"))?;
     context.emit_event(EventType::ChatModified(chat_id));
+    chatlist_events::emit_chatlist_item_changed(context, chat_id);
     if sync.into() {
         let chat = Chat::load_from_db(context, chat_id).await?;
         chat.sync(context, SyncAction::SetMuted(duration))
@@ -3881,6 +3905,7 @@ async fn rename_ex(
                 sync = Nosync;
             }
             context.emit_event(EventType::ChatModified(chat_id));
+            chatlist_events::emit_chatlist_item_changed(context, chat_id);
             success = true;
         }
     }
@@ -3941,6 +3966,7 @@ pub async fn set_chat_profile_image(
         context.emit_msgs_changed(chat_id, msg.id);
     }
     context.emit_event(EventType::ChatModified(chat_id));
+    chatlist_events::emit_chatlist_item_changed(context, chat_id);
     Ok(())
 }
 
@@ -4087,6 +4113,8 @@ pub async fn resend_msgs(context: &Context, msg_ids: &[MsgId]) -> Result<()> {
             msg_id: msg.id,
         });
         msg.timestamp_sort = create_smeared_timestamp(context);
+        // note(treefit): only matters if it is the last message in chat (but probably to expensive to check, debounce also solves it)
+        chatlist_events::emit_chatlist_item_changed(context, msg.chat_id);
         if !create_send_msg_jobs(context, &mut msg).await?.is_empty() {
             context.scheduler.interrupt_smtp().await;
         }

src/contact.rs

@@ -37,7 +37,7 @@ use crate::tools::{
     duration_to_str, get_abs_path, improve_single_line_input, strip_rtlo_characters, time,
     EmailAddress, SystemTime,
 };
-use crate::{chat, stock_str};
+use crate::{chat, chatlist_events, stock_str};
 
 /// Time during which a contact is considered as seen recently.
 const SEEN_RECENTLY_SECONDS: i64 = 600;
@@ -760,6 +760,7 @@ impl Contact {
                             if count > 0 {
                                 // Chat name updated
                                 context.emit_event(EventType::ChatModified(chat_id));
+                                chatlist_events::emit_chatlist_items_changed_for_contact(context, contact_id);
                             }
                         }
                     }
@@ -796,7 +797,9 @@ impl Contact {
             Ok(row_id)
         }).await?;
 
-        Ok((ContactId::new(row_id), sth_modified))
+        let contact_id = ContactId::new(row_id);
+
+        Ok((contact_id, sth_modified))
     }
 
     /// Add a number of contacts.
@@ -1524,6 +1527,7 @@ WHERE type=? AND id IN (
         }
     }
 
+    chatlist_events::emit_chatlist_changed(context);
     Ok(())
 }
 
@@ -1574,6 +1578,7 @@ pub(crate) async fn set_profile_image(
     if changed {
         contact.update_param(context).await?;
         context.emit_event(EventType::ContactsChanged(Some(contact_id)));
+        chatlist_events::emit_chatlist_item_changed_for_contact_chat(context, contact_id).await;
     }
     Ok(())
 }
@@ -1786,6 +1791,11 @@ impl RecentlySeenLoop {
                         // Timeout, notify about contact.
                         if let Some(contact_id) = contact_id {
                             context.emit_event(EventType::ContactsChanged(Some(*contact_id)));
+                            chatlist_events::emit_chatlist_item_changed_for_contact_chat(
+                                &context,
+                                *contact_id,
+                            )
+                            .await;
                             unseen_queue.pop();
                         }
                     }
@@ -1818,6 +1828,11 @@ impl RecentlySeenLoop {
                 // Event is already in the past.
                 if let Some(contact_id) = contact_id {
                     context.emit_event(EventType::ContactsChanged(Some(*contact_id)));
+                    chatlist_events::emit_chatlist_item_changed_for_contact_chat(
+                        &context,
+                        *contact_id,
+                    )
+                    .await;
                 }
                 unseen_queue.pop();
             }

src/context.rs

@@ -16,6 +16,7 @@ use tokio::sync::{Mutex, Notify, RwLock};
 
 use crate::aheader::EncryptPreference;
 use crate::chat::{get_chat_cnt, ChatId, ProtectionStatus};
+use crate::chatlist_events;
 use crate::config::Config;
 use crate::constants::{
     self, DC_BACKGROUND_FETCH_QUOTA_CHECK_RATELIMIT, DC_CHAT_ID_TRASH, DC_VERSION_STR,
@@ -593,11 +594,15 @@ impl Context {
     /// Emits a MsgsChanged event with specified chat and message ids
     pub fn emit_msgs_changed(&self, chat_id: ChatId, msg_id: MsgId) {
         self.emit_event(EventType::MsgsChanged { chat_id, msg_id });
+        chatlist_events::emit_chatlist_changed(self);
+        chatlist_events::emit_chatlist_item_changed(self, chat_id);
     }
 
     /// Emits an IncomingMsg event with specified chat and message ids
     pub fn emit_incoming_msg(&self, chat_id: ChatId, msg_id: MsgId) {
         self.emit_event(EventType::IncomingMsg { chat_id, msg_id });
+        chatlist_events::emit_chatlist_changed(self);
+        chatlist_events::emit_chatlist_item_changed(self, chat_id);
     }
 
     /// Returns a receiver for emitted events.

src/download.rs

@@ -13,7 +13,7 @@ use crate::imap::session::Session;
 use crate::message::{Message, MsgId, Viewtype};
 use crate::mimeparser::{MimeMessage, Part};
 use crate::tools::time;
-use crate::{stock_str, EventType};
+use crate::{chatlist_events, stock_str, EventType};
 
 /// Download limits should not be used below `MIN_DOWNLOAD_LIMIT`.
 ///
@@ -115,6 +115,7 @@ impl MsgId {
             chat_id: msg.chat_id,
             msg_id: self,
         });
+        chatlist_events::emit_chatlist_item_changed(context, msg.chat_id);
         Ok(())
     }
 }

src/events.rs

@@ -3,6 +3,7 @@
 use async_channel::{self as channel, Receiver, Sender, TrySendError};
 use pin_project::pin_project;
 
+pub(crate) mod chatlist_events;
 mod payload;
 
 pub use self::payload::EventType;

src/events/chatlist_events.rs

@@ -0,0 +1,635 @@
+use crate::{chat::ChatId, contact::ContactId, context::Context, EventType};
+
+/// order or content of chatlist changes (chat ids, not the actual chatlist item)
+pub(crate) fn emit_chatlist_changed(context: &Context) {
+    context.emit_event(EventType::ChatlistChanged);
+}
+
+/// Chatlist item of a specific chat changed
+pub(crate) fn emit_chatlist_item_changed(context: &Context, chat_id: ChatId) {
+    context.emit_event(EventType::ChatlistItemChanged {
+        chat_id: Some(chat_id),
+    });
+}
+
+/// Used when you don't know which chatlist items changed, this reloads all cached chatlist items in the UI
+///
+/// Avoid calling this when you can find out the affected chat ids easialy (without extra expensive db queries).
+///
+/// This method is not public, so you have to define and document your new case here in this file.
+fn emit_unknown_chatlist_items_changed(context: &Context) {
+    context.emit_event(EventType::ChatlistItemChanged { chat_id: None });
+}
+
+/// update event for the 1:1 chat with the contact
+/// used when recently seen changes and when profile image changes
+pub(crate) async fn emit_chatlist_item_changed_for_contact_chat(
+    context: &Context,
+    contact_id: ContactId,
+) {
+    match ChatId::lookup_by_contact(context, contact_id).await {
+        Ok(Some(chat_id)) => self::emit_chatlist_item_changed(context, chat_id),
+        Ok(None) => {}
+        Err(error) => context.emit_event(EventType::Error(format!(
+            "failed to find chat id for contact for chatlist event: {error:?}"
+        ))),
+    }
+}
+
+/// update items for chats that have the contact
+/// used when contact changes their name or did AEAP for example
+///
+/// The most common case is that the contact changed their name
+/// and their name should be updated in the chatlistitems for the chats
+/// where they sent the last message as there their name is shown in the summary on those
+pub(crate) fn emit_chatlist_items_changed_for_contact(context: &Context, _contact_id: ContactId) {
+    // note:(treefit): it is too expensive to find the right chats
+    // so we'll just tell ui to reload every loaded item
+    emit_unknown_chatlist_items_changed(context)
+    // note:(treefit): in the future we could instead emit an extra event for this and also store contact id in the chatlistitems
+    // (contact id for dm chats and contact id of contact that wrote the message in the summary)
+    // the ui could then look for this info in the cache and only reload the needed chats.
+}
+
+/// Tests for chatlist events
+///
+/// Only checks if the events are emitted,
+/// does not check for excess/too-many events
+#[cfg(test)]
+mod test_chatlist_events {
+
+    use std::{
+        sync::atomic::{AtomicBool, Ordering},
+        time::Duration,
+    };
+
+    use crate::{
+        chat::{
+            self, create_broadcast_list, create_group_chat, set_muted, ChatId, ChatVisibility,
+            MuteDuration, ProtectionStatus,
+        },
+        config::Config,
+        constants::*,
+        contact::Contact,
+        message::{self, Message, MessageState},
+        reaction,
+        receive_imf::receive_imf,
+        securejoin::{get_securejoin_qr, join_securejoin},
+        test_utils::{TestContext, TestContextManager},
+        EventType,
+    };
+
+    use anyhow::Result;
+
+    async fn wait_for_chatlist_and_specific_item(context: &TestContext, chat_id: ChatId) {
+        let first_event_is_item = AtomicBool::new(false);
+        context
+            .evtracker
+            .get_matching(|evt| match evt {
+                EventType::ChatlistItemChanged {
+                    chat_id: Some(ev_chat_id),
+                } => {
+                    if ev_chat_id == &chat_id {
+                        first_event_is_item.store(true, Ordering::Relaxed);
+                        true
+                    } else {
+                        false
+                    }
+                }
+                EventType::ChatlistChanged => true,
+                _ => false,
+            })
+            .await;
+        if first_event_is_item.load(Ordering::Relaxed) {
+            wait_for_chatlist(context).await;
+        } else {
+            wait_for_chatlist_specific_item(context, chat_id).await;
+        }
+    }
+
+    async fn wait_for_chatlist_specific_item(context: &TestContext, chat_id: ChatId) {
+        context
+            .evtracker
+            .get_matching(|evt| match evt {
+                EventType::ChatlistItemChanged {
+                    chat_id: Some(ev_chat_id),
+                } => ev_chat_id == &chat_id,
+                _ => false,
+            })
+            .await;
+    }
+
+    async fn wait_for_chatlist_all_items(context: &TestContext) {
+        context
+            .evtracker
+            .get_matching(|evt| matches!(evt, EventType::ChatlistItemChanged { chat_id: None }))
+            .await;
+    }
+
+    async fn wait_for_chatlist(context: &TestContext) {
+        context
+            .evtracker
+            .get_matching(|evt| matches!(evt, EventType::ChatlistChanged))
+            .await;
+    }
+
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_change_chat_visibility() -> Result<()> {
+        let mut tcm = TestContextManager::new();
+        let alice = tcm.alice().await;
+        let chat_id = create_group_chat(
+            &alice,
+            crate::chat::ProtectionStatus::Unprotected,
+            "my_group",
+        )
+        .await?;
+
+        chat_id
+            .set_visibility(&alice, ChatVisibility::Pinned)
+            .await?;
+        wait_for_chatlist_and_specific_item(&alice, chat_id).await;
+
+        chat_id
+            .set_visibility(&alice, ChatVisibility::Archived)
+            .await?;
+        wait_for_chatlist_and_specific_item(&alice, chat_id).await;
+
+        chat_id
+            .set_visibility(&alice, ChatVisibility::Normal)
+            .await?;
+        wait_for_chatlist_and_specific_item(&alice, chat_id).await;
+
+        Ok(())
+    }
+
+    /// mute a chat, archive it, then use another account to send a message to it, the counter on the archived chatlist item should change
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_archived_counter_increases_for_muted_chats() -> Result<()> {
+        let mut tcm = TestContextManager::new();
+        let alice = tcm.alice().await;
+        let bob = tcm.bob().await;
+
+        let chat = alice.create_chat(&bob).await;
+        let sent_msg = alice.send_text(chat.id, "moin").await;
+        bob.recv_msg(&sent_msg).await;
+
+        let bob_chat = bob.create_chat(&alice).await;
+        bob_chat
+            .id
+            .set_visibility(&bob, ChatVisibility::Archived)
+            .await?;
+        set_muted(&bob, bob_chat.id, MuteDuration::Forever).await?;
+
+        bob.evtracker.clear_events();
+
+        let sent_msg = alice.send_text(chat.id, "moin2").await;
+        bob.recv_msg(&sent_msg).await;
+
+        bob.evtracker
+            .get_matching(|evt| match evt {
+                EventType::ChatlistItemChanged {
+                    chat_id: Some(chat_id),
+                } => chat_id.is_archived_link(),
+                _ => false,
+            })
+            .await;
+
+        Ok(())
+    }
+
+    /// Mark noticed on archive-link chatlistitem should update the unread counter on it
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_archived_counter_update_on_mark_noticed() -> Result<()> {
+        let mut tcm = TestContextManager::new();
+        let alice = tcm.alice().await;
+        let bob = tcm.bob().await;
+        let chat = alice.create_chat(&bob).await;
+        let sent_msg = alice.send_text(chat.id, "moin").await;
+        bob.recv_msg(&sent_msg).await;
+        let bob_chat = bob.create_chat(&alice).await;
+        bob_chat
+            .id
+            .set_visibility(&bob, ChatVisibility::Archived)
+            .await?;
+        set_muted(&bob, bob_chat.id, MuteDuration::Forever).await?;
+        let sent_msg = alice.send_text(chat.id, "moin2").await;
+        bob.recv_msg(&sent_msg).await;
+
+        bob.evtracker.clear_events();
+        chat::marknoticed_chat(&bob, DC_CHAT_ID_ARCHIVED_LINK).await?;
+        wait_for_chatlist_specific_item(&bob, DC_CHAT_ID_ARCHIVED_LINK).await;
+
+        Ok(())
+    }
+
+    /// Contact name update - expect all chats to update
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_contact_name_update() -> Result<()> {
+        let mut tcm = TestContextManager::new();
+        let alice = tcm.alice().await;
+        let bob = tcm.bob().await;
+        let alice_to_bob_chat = alice.create_chat(&bob).await;
+        let sent_msg = alice.send_text(alice_to_bob_chat.id, "hello").await;
+        bob.recv_msg(&sent_msg).await;
+
+        bob.evtracker.clear_events();
+        // set alice name then receive messagefrom her with bob
+        alice.set_config(Config::Displayname, Some("Alice")).await?;
+        let sent_msg = alice
+            .send_text(alice_to_bob_chat.id, "hello, I set a displayname")
+            .await;
+        bob.recv_msg(&sent_msg).await;
+        let alice_on_bob = bob.add_or_lookup_contact(&alice).await;
+        assert!(alice_on_bob.get_display_name() == "Alice");
+
+        wait_for_chatlist_all_items(&bob).await;
+
+        bob.evtracker.clear_events();
+        // set name
+        let addr = alice_on_bob.get_addr();
+        Contact::create(&bob, "Alice2", addr).await?;
+        assert!(bob.add_or_lookup_contact(&alice).await.get_display_name() == "Alice2");
+
+        wait_for_chatlist_all_items(&bob).await;
+
+        Ok(())
+    }
+
+    /// Contact changed avatar
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_contact_changed_avatar() -> Result<()> {
+        let mut tcm = TestContextManager::new();
+        let alice = tcm.alice().await;
+        let bob = tcm.bob().await;
+        let alice_to_bob_chat = alice.create_chat(&bob).await;
+        let sent_msg = alice.send_text(alice_to_bob_chat.id, "hello").await;
+        bob.recv_msg(&sent_msg).await;
+
+        bob.evtracker.clear_events();
+        // set alice avatar then receive messagefrom her with bob
+        let file = alice.dir.path().join("avatar.png");
+        let bytes = include_bytes!("../../test-data/image/avatar64x64.png");
+        tokio::fs::write(&file, bytes).await?;
+        alice
+            .set_config(Config::Selfavatar, Some(file.to_str().unwrap()))
+            .await?;
+        let sent_msg = alice
+            .send_text(alice_to_bob_chat.id, "hello, I have a new avatar")
+            .await;
+        bob.recv_msg(&sent_msg).await;
+        let alice_on_bob = bob.add_or_lookup_contact(&alice).await;
+        assert!(alice_on_bob.get_profile_image(&bob).await?.is_some());
+
+        wait_for_chatlist_specific_item(&bob, bob.create_chat(&alice).await.id).await;
+        Ok(())
+    }
+
+    /// Delete chat
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_delete_chat() -> Result<()> {
+        let mut tcm = TestContextManager::new();
+        let alice = tcm.alice().await;
+        let chat = create_group_chat(&alice, ProtectionStatus::Protected, "My Group").await?;
+
+        alice.evtracker.clear_events();
+        chat.delete(&alice).await?;
+        wait_for_chatlist(&alice).await;
+        Ok(())
+    }
+
+    /// Create group chat
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_create_group_chat() -> Result<()> {
+        let mut tcm = TestContextManager::new();
+        let alice = tcm.alice().await;
+        alice.evtracker.clear_events();
+        let chat = create_group_chat(&alice, ProtectionStatus::Protected, "My Group").await?;
+        wait_for_chatlist_and_specific_item(&alice, chat).await;
+        Ok(())
+    }
+
+    /// Create broadcastlist
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_create_broadcastlist() -> Result<()> {
+        let mut tcm = TestContextManager::new();
+        let alice = tcm.alice().await;
+        alice.evtracker.clear_events();
+        create_broadcast_list(&alice).await?;
+        wait_for_chatlist(&alice).await;
+        Ok(())
+    }
+
+    /// Mute chat
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_mute_chat() -> Result<()> {
+        let mut tcm = TestContextManager::new();
+        let alice = tcm.alice().await;
+        let chat = create_group_chat(&alice, ProtectionStatus::Protected, "My Group").await?;
+
+        alice.evtracker.clear_events();
+        chat::set_muted(&alice, chat, MuteDuration::Forever).await?;
+        wait_for_chatlist_specific_item(&alice, chat).await;
+
+        alice.evtracker.clear_events();
+        chat::set_muted(&alice, chat, MuteDuration::NotMuted).await?;
+        wait_for_chatlist_specific_item(&alice, chat).await;
+
+        Ok(())
+    }
+
+    /// Expiry of mute should also trigger an event
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    #[ignore = "does not work yet"]
+    async fn test_mute_chat_expired() -> Result<()> {
+        let mut tcm = TestContextManager::new();
+        let alice = tcm.alice().await;
+        let chat = create_group_chat(&alice, ProtectionStatus::Protected, "My Group").await?;
+
+        let mute_duration = MuteDuration::Until(
+            std::time::SystemTime::now()
+                .checked_add(Duration::from_secs(2))
+                .unwrap(),
+        );
+        chat::set_muted(&alice, chat, mute_duration).await?;
+        alice.evtracker.clear_events();
+        tokio::time::sleep(Duration::from_secs(3)).await;
+        wait_for_chatlist_specific_item(&alice, chat).await;
+
+        Ok(())
+    }
+
+    /// Change chat name
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_change_chat_name() -> Result<()> {
+        let mut tcm = TestContextManager::new();
+        let alice = tcm.alice().await;
+        let chat = create_group_chat(&alice, ProtectionStatus::Protected, "My Group").await?;
+
+        alice.evtracker.clear_events();
+        chat::set_chat_name(&alice, chat, "New Name").await?;
+        wait_for_chatlist_specific_item(&alice, chat).await;
+
+        Ok(())
+    }
+
+    /// Change chat profile image
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_change_chat_profile_image() -> Result<()> {
+        let mut tcm = TestContextManager::new();
+        let alice = tcm.alice().await;
+        let chat = create_group_chat(&alice, ProtectionStatus::Protected, "My Group").await?;
+
+        alice.evtracker.clear_events();
+        let file = alice.dir.path().join("avatar.png");
+        let bytes = include_bytes!("../../test-data/image/avatar64x64.png");
+        tokio::fs::write(&file, bytes).await?;
+        chat::set_chat_profile_image(&alice, chat, file.to_str().unwrap()).await?;
+        wait_for_chatlist_specific_item(&alice, chat).await;
+
+        Ok(())
+    }
+
+    /// Receive group and receive name change
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_receiving_group_and_group_changes() -> Result<()> {
+        let mut tcm = TestContextManager::new();
+        let alice = tcm.alice().await;
+        let bob = tcm.bob().await;
+        let chat = alice
+            .create_group_with_members(ProtectionStatus::Unprotected, "My Group", &[&bob])
+            .await;
+
+        let sent_msg = alice.send_text(chat, "Hello").await;
+        let chat_id_for_bob = bob.recv_msg(&sent_msg).await.chat_id;
+        wait_for_chatlist_specific_item(&bob, chat_id_for_bob).await;
+        chat_id_for_bob.accept(&bob).await?;
+
+        bob.evtracker.clear_events();
+        chat::set_chat_name(&alice, chat, "New Name").await?;
+        let sent_msg = alice.send_text(chat, "Hello").await;
+        bob.recv_msg(&sent_msg).await;
+        wait_for_chatlist_specific_item(&bob, chat_id_for_bob).await;
+
+        Ok(())
+    }
+
+    /// Accept contact request
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_accept_contact_request() -> Result<()> {
+        let mut tcm = TestContextManager::new();
+        let alice = tcm.alice().await;
+        let bob = tcm.bob().await;
+        let chat = alice
+            .create_group_with_members(ProtectionStatus::Unprotected, "My Group", &[&bob])
+            .await;
+        let sent_msg = alice.send_text(chat, "Hello").await;
+        let chat_id_for_bob = bob.recv_msg(&sent_msg).await.chat_id;
+
+        bob.evtracker.clear_events();
+        chat_id_for_bob.accept(&bob).await?;
+        wait_for_chatlist_specific_item(&bob, chat_id_for_bob).await;
+
+        Ok(())
+    }
+
+    /// Block contact request
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_block_contact_request() -> Result<()> {
+        let mut tcm = TestContextManager::new();
+        let alice = tcm.alice().await;
+        let bob = tcm.bob().await;
+        let chat = alice
+            .create_group_with_members(ProtectionStatus::Unprotected, "My Group", &[&bob])
+            .await;
+        let sent_msg = alice.send_text(chat, "Hello").await;
+        let chat_id_for_bob = bob.recv_msg(&sent_msg).await.chat_id;
+
+        bob.evtracker.clear_events();
+        chat_id_for_bob.block(&bob).await?;
+        wait_for_chatlist(&bob).await;
+
+        Ok(())
+    }
+
+    /// Delete message
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_delete_message() -> Result<()> {
+        let mut tcm = TestContextManager::new();
+        let alice = tcm.alice().await;
+        let chat = create_group_chat(&alice, ProtectionStatus::Protected, "My Group").await?;
+        let message = chat::send_text_msg(&alice, chat, "Hello World".to_owned()).await?;
+
+        alice.evtracker.clear_events();
+        message::delete_msgs(&alice, &[message]).await?;
+        wait_for_chatlist_specific_item(&alice, chat).await;
+
+        Ok(())
+    }
+
+    /// Click on chat should remove the unread count (on msgs noticed)
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_msgs_noticed_on_chat() -> Result<()> {
+        let mut tcm = TestContextManager::new();
+        let alice = tcm.alice().await;
+        let bob = tcm.bob().await;
+
+        let chat = alice
+            .create_group_with_members(ProtectionStatus::Unprotected, "My Group", &[&bob])
+            .await;
+        let sent_msg = alice.send_text(chat, "Hello").await;
+        let chat_id_for_bob = bob.recv_msg(&sent_msg).await.chat_id;
+        chat_id_for_bob.accept(&bob).await?;
+
+        let sent_msg = alice.send_text(chat, "New Message").await;
+        let chat_id_for_bob = bob.recv_msg(&sent_msg).await.chat_id;
+        assert!(chat_id_for_bob.get_fresh_msg_cnt(&bob).await? >= 1);
+
+        bob.evtracker.clear_events();
+        chat::marknoticed_chat(&bob, chat_id_for_bob).await?;
+        wait_for_chatlist_specific_item(&bob, chat_id_for_bob).await;
+
+        Ok(())
+    }
+
+    // Block and Unblock contact
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_unblock_contact() -> Result<()> {
+        let mut tcm = TestContextManager::new();
+        let alice = tcm.alice().await;
+        let contact_id = Contact::create(&alice, "example", "example@example.com").await?;
+        let _ = ChatId::create_for_contact(&alice, contact_id).await;
+
+        alice.evtracker.clear_events();
+        Contact::block(&alice, contact_id).await?;
+        wait_for_chatlist(&alice).await;
+
+        alice.evtracker.clear_events();
+        Contact::unblock(&alice, contact_id).await?;
+        wait_for_chatlist(&alice).await;
+
+        Ok(())
+    }
+
+    /// ephemeral / disappearing messages
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_update_after_ephemeral_messages() -> Result<()> {
+        let mut tcm = TestContextManager::new();
+        let alice = tcm.alice().await;
+        let chat = create_group_chat(&alice, ProtectionStatus::Protected, "My Group").await?;
+        chat.set_ephemeral_timer(&alice, crate::ephemeral::Timer::Enabled { duration: 1 })
+            .await?;
+        let _ = chat::send_text_msg(&alice, chat, "Hello".to_owned()).await?;
+
+        alice.evtracker.clear_events();
+        tokio::time::sleep(Duration::from_secs(2)).await;
+        wait_for_chatlist_and_specific_item(&alice, chat).await;
+
+        Ok(())
+    }
+
+    /// AdHoc (Groups without a group ID.) group receiving
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_adhoc_group() -> Result<()> {
+        let alice = TestContext::new_alice().await;
+        let mime = br#"Subject: First thread
+Message-ID: first@example.org
+To: Alice <alice@example.org>, Bob <bob@example.net>
+From: Claire <claire@example.org>
+Content-Type: text/plain; charset=utf-8; format=flowed; delsp=no
+
+First thread."#;
+
+        alice.evtracker.clear_events();
+        receive_imf(&alice, mime, false).await?;
+        wait_for_chatlist(&alice).await;
+
+        Ok(())
+    }
+
+    /// Test both direction of securejoin
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_secure_join_group() -> Result<()> {
+        let mut tcm = TestContextManager::new();
+        let alice = tcm.alice().await;
+        let bob = tcm.bob().await;
+
+        let alice_chatid =
+            chat::create_group_chat(&alice.ctx, ProtectionStatus::Protected, "the chat").await?;
+
+        // Step 1: Generate QR-code, secure-join implied by chatid
+        let qr = get_securejoin_qr(&alice.ctx, Some(alice_chatid)).await?;
+
+        // Step 2: Bob scans QR-code, sends vg-request
+        bob.evtracker.clear_events();
+        let bob_chatid = join_securejoin(&bob.ctx, &qr).await?;
+        wait_for_chatlist(&bob).await;
+
+        let sent = bob.pop_sent_msg().await;
+
+        // Step 3: Alice receives vg-request, sends vg-auth-required
+        alice.evtracker.clear_events();
+        alice.recv_msg(&sent).await;
+
+        let sent = alice.pop_sent_msg().await;
+
+        // Step 4: Bob receives vg-auth-required, sends vg-request-with-auth
+        bob.evtracker.clear_events();
+        bob.recv_msg(&sent).await;
+        wait_for_chatlist_and_specific_item(&bob, bob_chatid).await;
+
+        let sent = bob.pop_sent_msg().await;
+
+        // Step 5+6: Alice receives vg-request-with-auth, sends vg-member-added
+        alice.evtracker.clear_events();
+        alice.recv_msg(&sent).await;
+        wait_for_chatlist_and_specific_item(&alice, alice_chatid).await;
+
+        let sent = alice.pop_sent_msg().await;
+
+        // Step 7: Bob receives vg-member-added
+        bob.evtracker.clear_events();
+        bob.recv_msg(&sent).await;
+        wait_for_chatlist_and_specific_item(&bob, bob_chatid).await;
+
+        Ok(())
+    }
+
+    /// Call Resend on message
+    ///
+    /// (the event is technically only needed if it is the last message in the chat, but checking that would be too expensive so the event is always emitted)
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_resend_message() -> Result<()> {
+        let mut tcm = TestContextManager::new();
+        let alice = tcm.alice().await;
+        let chat = create_group_chat(&alice, ProtectionStatus::Protected, "My Group").await?;
+
+        let msg_id = chat::send_text_msg(&alice, chat, "Hello".to_owned()).await?;
+        let _ = alice.pop_sent_msg().await;
+
+        let message = Message::load_from_db(&alice, msg_id).await?;
+        assert_eq!(message.get_state(), MessageState::OutDelivered);
+
+        alice.evtracker.clear_events();
+        chat::resend_msgs(&alice, &[msg_id]).await?;
+        wait_for_chatlist_specific_item(&alice, chat).await;
+
+        Ok(())
+    }
+
+    /// test that setting a reaction emits chatlistitem update event
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_reaction() -> Result<()> {
+        let mut tcm = TestContextManager::new();
+        let alice = tcm.alice().await;
+        let chat = create_group_chat(&alice, ProtectionStatus::Protected, "My Group").await?;
+        let msg_id = chat::send_text_msg(&alice, chat, "Hello".to_owned()).await?;
+        let _ = alice.pop_sent_msg().await;
+
+        alice.evtracker.clear_events();
+        reaction::send_reaction(&alice, msg_id, "👍").await?;
+        let _ = alice.pop_sent_msg().await;
+        wait_for_chatlist_specific_item(&alice, chat).await;
+
+        Ok(())
+    }
+}

src/events/payload.rs

@@ -291,4 +291,15 @@ pub enum EventType {
     ///
     /// This event is only emitted by the account manager
     AccountsBackgroundFetchDone,
+    /// Inform that set of chats or the order of the chats in the chatlist has changed.
+    ///
+    /// Sometimes this is emitted together with `UIChatlistItemChanged`.
+    ChatlistChanged,
+
+    /// Inform that a single chat list item changed and needs to be rerendered.
+    /// If `chat_id` is set to None, then all currently visible chats need to be rerendered, and all not-visible items need to be cleared from cache if the UI has a cache.
+    ChatlistItemChanged {
+        /// ID of the changed chat
+        chat_id: Option<ChatId>,
+    },
 }

src/imap.rs

@@ -22,6 +22,7 @@ use ratelimit::Ratelimit;
 use tokio::sync::RwLock;
 
 use crate::chat::{self, ChatId, ChatIdBlocked};
+use crate::chatlist_events;
 use crate::config::Config;
 use crate::constants::{self, Blocked, Chattype, ShowEmails};
 use crate::contact::{normalize_name, Contact, ContactAddress, ContactId, Modifier, Origin};
@@ -1170,6 +1171,7 @@ impl Session {
             .with_context(|| format!("failed to set MODSEQ for folder {folder}"))?;
         for updated_chat_id in updated_chat_ids {
             context.emit_event(EventType::MsgsNoticed(updated_chat_id));
+            chatlist_events::emit_chatlist_item_changed(context, updated_chat_id);
         }
 
         Ok(())

src/location.rs

@@ -13,8 +13,8 @@ use crate::context::Context;
 use crate::events::EventType;
 use crate::message::{Message, MsgId, Viewtype};
 use crate::mimeparser::SystemMessage;
-use crate::stock_str;
 use crate::tools::{duration_to_str, time};
+use crate::{chatlist_events, stock_str};
 
 /// Location record.
 #[derive(Debug, Clone, Default)]
@@ -290,6 +290,7 @@ pub async fn send_locations_to_chat(
         chat::add_info_msg(context, chat_id, &stock_str, now).await?;
     }
     context.emit_event(EventType::ChatModified(chat_id));
+    chatlist_events::emit_chatlist_item_changed(context, chat_id);
     if 0 != seconds {
         context.scheduler.interrupt_location().await;
     }
@@ -802,6 +803,7 @@ async fn maybe_send_locations(context: &Context) -> Result<Option<u64>> {
             let stock_str = stock_str::msg_location_disabled(context).await;
             chat::add_info_msg(context, chat_id, &stock_str, now).await?;
             context.emit_event(EventType::ChatModified(chat_id));
+            chatlist_events::emit_chatlist_item_changed(context, chat_id);
         }
     }
 

src/message.rs

@@ -9,6 +9,7 @@ use serde::{Deserialize, Serialize};
 
 use crate::blob::BlobObject;
 use crate::chat::{Chat, ChatId};
+use crate::chatlist_events;
 use crate::config::Config;
 use crate::constants::{
     Blocked, Chattype, VideochatType, DC_CHAT_ID_TRASH, DC_DESIRED_TEXT_LEN, DC_MSG_ID_LAST_SPECIAL,
@@ -138,6 +139,7 @@ WHERE id=?;
             chat_id,
             msg_id: self,
         });
+        chatlist_events::emit_chatlist_item_changed(context, chat_id);
         Ok(())
     }
 
@@ -1527,9 +1529,12 @@ pub async fn delete_msgs(context: &Context, msg_ids: &[MsgId]) -> Result<()> {
 
     for modified_chat_id in modified_chat_ids {
         context.emit_msgs_changed(modified_chat_id, MsgId::new(0));
+        chatlist_events::emit_chatlist_item_changed(context, modified_chat_id);
     }
 
     if !msg_ids.is_empty() {
+        context.emit_msgs_changed_without_ids();
+        chatlist_events::emit_chatlist_changed(context);
         // Run housekeeping to delete unused blobs.
         context
             .set_config_internal(Config::LastHousekeeping, None)
@@ -1664,6 +1669,7 @@ pub async fn markseen_msgs(context: &Context, msg_ids: Vec<MsgId>) -> Result<()>
 
     for updated_chat_id in updated_chat_ids {
         context.emit_event(EventType::MsgsNoticed(updated_chat_id));
+        chatlist_events::emit_chatlist_item_changed(context, updated_chat_id);
     }
 
     Ok(())
@@ -1724,6 +1730,7 @@ pub(crate) async fn set_msg_failed(
         chat_id: msg.chat_id,
         msg_id: msg.id,
     });
+    chatlist_events::emit_chatlist_item_changed(context, msg.chat_id);
 
     Ok(())
 }

src/mimeparser.rs

@@ -32,13 +32,12 @@ use crate::message::{
 use crate::param::{Param, Params};
 use crate::peerstate::Peerstate;
 use crate::simplify::{simplify, SimplifiedText};
-use crate::stock_str;
 use crate::sync::SyncItems;
 use crate::tools::{
     create_smeared_timestamp, get_filemeta, parse_receive_headers, smeared_time,
     strip_rtlo_characters, truncate_by_lines,
 };
-use crate::{location, tools};
+use crate::{chatlist_events, location, stock_str, tools};
 
 /// A parsed MIME message.
 ///
@@ -2153,6 +2152,8 @@ async fn handle_mdn(
     {
         update_msg_state(context, msg_id, MessageState::OutMdnRcvd).await?;
         context.emit_event(EventType::MsgRead { chat_id, msg_id });
+        // note(treefit): only matters if it is the last message in chat (but probably too expensive to check, debounce also solves it)
+        chatlist_events::emit_chatlist_item_changed(context, chat_id);
     }
     Ok(())
 }

src/peerstate.rs

@@ -17,7 +17,7 @@ use crate::key::{DcKey, Fingerprint, SignedPublicKey};
 use crate::message::Message;
 use crate::mimeparser::SystemMessage;
 use crate::sql::Sql;
-use crate::stock_str;
+use crate::{chatlist_events, stock_str};
 
 /// Type of the public key stored inside the peerstate.
 #[derive(Debug)]
@@ -722,6 +722,9 @@ impl Peerstate {
             .await?;
         }
 
+        chatlist_events::emit_chatlist_changed(context);
+        // update the chats the contact is part of
+        chatlist_events::emit_chatlist_items_changed_for_contact(context, contact_id);
         Ok(())
     }
 

src/reaction.rs

@@ -21,6 +21,7 @@ use std::fmt;
 use anyhow::Result;
 
 use crate::chat::{send_msg, Chat, ChatId};
+use crate::chatlist_events;
 use crate::contact::ContactId;
 use crate::context::Context;
 use crate::events::EventType;
@@ -214,6 +215,7 @@ async fn set_msg_id_reaction(
         msg_id,
         contact_id,
     });
+    chatlist_events::emit_chatlist_item_changed(context, chat_id);
     Ok(())
 }
 

src/receive_imf.rs

@@ -22,7 +22,6 @@ use crate::ephemeral::{stock_ephemeral_timer_changed, Timer as EphemeralTimer};
 use crate::events::EventType;
 use crate::headerdef::{HeaderDef, HeaderDefMap};
 use crate::imap::{markseen_on_imap_table, GENERATED_PREFIX};
-use crate::location;
 use crate::log::LogExt;
 use crate::message::{
     self, rfc724_mid_exists, rfc724_mid_exists_and, Message, MessageState, MessengerMessage, MsgId,
@@ -40,6 +39,7 @@ use crate::sync::Sync::*;
 use crate::tools::{
     self, buf_compress, extract_grpid_from_rfc724_mid, strip_rtlo_characters, validate_id,
 };
+use crate::{chatlist_events, location};
 use crate::{contact, imap};
 
 /// This is the struct that is returned after receiving one email (aka MIME message).
@@ -1903,6 +1903,8 @@ async fn create_or_lookup_group(
         chat::add_to_chat_contacts_table(context, new_chat_id, &members).await?;
 
         context.emit_event(EventType::ChatModified(new_chat_id));
+        chatlist_events::emit_chatlist_changed(context);
+        chatlist_events::emit_chatlist_item_changed(context, new_chat_id);
     }
 
     if let Some(chat_id) = chat_id {
@@ -2216,6 +2218,7 @@ async fn apply_group_changes(
 
     if send_event_chat_modified {
         context.emit_event(EventType::ChatModified(chat_id));
+        chatlist_events::emit_chatlist_item_changed(context, chat_id);
     }
     Ok((group_changes_msgs, better_msg))
 }
@@ -2518,6 +2521,8 @@ async fn create_adhoc_group(
     chat::add_to_chat_contacts_table(context, new_chat_id, member_ids).await?;
 
     context.emit_event(EventType::ChatModified(new_chat_id));
+    chatlist_events::emit_chatlist_changed(context);
+    chatlist_events::emit_chatlist_item_changed(context, new_chat_id);
 
     Ok(Some(new_chat_id))
 }

src/securejoin.rs

@@ -5,6 +5,7 @@ use percent_encoding::{utf8_percent_encode, AsciiSet, NON_ALPHANUMERIC};
 
 use crate::aheader::EncryptPreference;
 use crate::chat::{self, Chat, ChatId, ChatIdBlocked, ProtectionStatus};
+use crate::chatlist_events;
 use crate::config::Config;
 use crate::constants::Blocked;
 use crate::contact::{Contact, ContactId, Origin};
@@ -680,6 +681,7 @@ async fn secure_connection_established(
         )
         .await?;
     context.emit_event(EventType::ChatModified(chat_id));
+    chatlist_events::emit_chatlist_item_changed(context, chat_id);
     Ok(())
 }
 

src/test_utils.rs

@@ -1022,6 +1022,11 @@ impl EventTracker {
         self.get_matching(|evt| matches!(evt, EventType::IncomingMsg { .. }))
             .await;
     }
+
+    /// Clears event queue
+    pub fn clear_events(&self) {
+        while self.try_recv().is_ok() {}
+    }
 }
 
 /// Gets a specific message from a chat and asserts that the chat has a specific length.