feat: Emit chatlist events only if message still exists

Otherwise, if the message is already deleted, an appropriate chatlist event must be generated and
there's no need in any other events.

src/message.rs

@@ -150,16 +150,17 @@ impl MsgId {
 
     pub(crate) async fn set_delivered(self, context: &Context) -> Result<()> {
         update_msg_state(context, self, MessageState::OutDelivered).await?;
-        let chat_id: ChatId = context
+        let chat_id: Option<ChatId> = context
             .sql
             .query_get_value("SELECT chat_id FROM msgs WHERE id=?", (self,))
-            .await?
-            .unwrap_or_default();
+            .await?;
         context.emit_event(EventType::MsgDelivered {
-            chat_id,
+            chat_id: chat_id.unwrap_or_default(),
             msg_id: self,
         });
-        chatlist_events::emit_chatlist_item_changed(context, chat_id);
+        if let Some(chat_id) = chat_id {
+            chatlist_events::emit_chatlist_item_changed(context, chat_id);
+        }
         Ok(())
     }
 
@@ -1850,20 +1851,21 @@ pub(crate) async fn set_msg_failed(
     }
     msg.error = Some(error.to_string());
 
-    context
+    let exists = context
         .sql
         .execute(
             "UPDATE msgs SET state=?, error=? WHERE id=?;",
             (msg.state, error, msg.id),
         )
-        .await?;
-
+        .await?
+        > 0;
     context.emit_event(EventType::MsgFailed {
         chat_id: msg.chat_id,
         msg_id: msg.id,
     });
-    chatlist_events::emit_chatlist_item_changed(context, msg.chat_id);
-
+    if exists {
+        chatlist_events::emit_chatlist_item_changed(context, msg.chat_id);
+    }
     Ok(())
 }