feat: add MsgDeleted event

src/ephemeral.rs

@@ -429,7 +429,7 @@ pub(crate) async fn delete_expired_messages(context: &Context, now: i64) -> Resu
     if !rows.is_empty() {
         info!(context, "Attempting to delete {} messages.", rows.len());
 
-        let (_msgs_changed, webxdc_deleted) = context
+        let (msgs_changed, webxdc_deleted) = context
             .sql
             .transaction(|transaction| {
                 let mut msgs_changed = Vec::with_capacity(rows.len());
@@ -455,6 +455,10 @@ pub(crate) async fn delete_expired_messages(context: &Context, now: i64) -> Resu
             })
             .await?;
 
+        for (chat_id, msg_id) in msgs_changed {
+            context.emit_event(EventType::MsgDeleted { chat_id, msg_id })
+        }
+
         context.emit_msgs_changed_without_ids();
 
         for msg_id in webxdc_deleted {

src/events/payload.rs

@@ -145,6 +145,27 @@ pub enum EventType {
         msg_id: MsgId,
     },
 
+    /// A single message was deleted.
+    ///
+    /// This event means that the message will no longer appear in the messagelist.
+    /// UI should remove the message from the messagelist
+    /// in response to this event if the message is currently displayed.
+    ///
+    /// The message may have been explicitly deleted by the user or expired.
+    /// Internally the message may have been removed from the database,
+    /// moved to the trash chat or hidden.
+    ///
+    /// This event does not indicate the message
+    /// deletion from the server.
+    MsgDeleted {
+        /// ID of the chat where the message was prior to deletion.
+        /// Never 0 or trash chat.
+        chat_id: ChatId,
+
+        /// ID of the deleted message. Never 0.
+        msg_id: MsgId,
+    },
+
     /// Chat changed.  The name or the image of a chat group was changed or members were added or removed.
     /// Or the verify state of a chat has changed.
     /// See dc_set_chat_name(), dc_set_chat_profile_image(), dc_add_contact_to_chat()

src/message.rs

@@ -1431,6 +1431,11 @@ pub async fn delete_msgs(context: &Context, msg_ids: &[MsgId]) -> Result<()> {
             .await
             .with_context(|| format!("Unable to trash message {msg_id}"))?;
 
+        context.emit_event(EventType::MsgDeleted {
+            chat_id: msg.chat_id,
+            msg_id,
+        });
+
         if msg.viewtype == Viewtype::Webxdc {
             context.emit_event(EventType::WebxdcInstanceDeleted { msg_id });
         }