feat: Sync chats deletion across devices

Currently broadcast lists creation is synced across devices. Groups creation, in some means, too --
on a group promotion by a first message. Otoh, messages deletion is synced now as well. So, for
feature-completeness, sync chats deletion too.

src/chat.rs

@@ -434,7 +434,7 @@ impl ChatId {
                 .ok();
         }
         if delete {
-            self.delete(context).await?;
+            self.delete_ex(context, Nosync).await?;
         }
         Ok(())
     }
@@ -773,6 +773,10 @@ impl ChatId {
 
     /// Deletes a chat.
     pub async fn delete(self, context: &Context) -> Result<()> {
+        self.delete_ex(context, Sync).await
+    }
+
+    pub(crate) async fn delete_ex(self, context: &Context, sync: sync::Sync) -> Result<()> {
         ensure!(
             !self.is_special(),
             "bad chat_id, can not be a special chat: {}",
@@ -780,6 +784,10 @@ impl ChatId {
         );
 
         let chat = Chat::load_from_db(context, self).await?;
+        let sync_id = match sync {
+            Nosync => None,
+            Sync => chat.get_sync_id(context).await?,
+        };
 
         context
             .sql
@@ -796,12 +804,13 @@ impl ChatId {
             .await?;
 
         context.emit_msgs_changed_without_ids();
-        chatlist_events::emit_chatlist_changed(context);
 
-        context
-            .set_config_internal(Config::LastHousekeeping, None)
-            .await?;
-        context.scheduler.interrupt_inbox().await;
+        if let Some(id) = sync_id {
+            self::sync(context, id, SyncAction::Delete)
+                .await
+                .log_err(context)
+                .ok();
+        }
 
         if chat.is_self_talk() {
             let mut msg = Message::new_text(stock_str::self_deleted_msg_body(context).await);
@@ -809,6 +818,11 @@ impl ChatId {
         }
         chatlist_events::emit_chatlist_changed(context);
 
+        context
+            .set_config_internal(Config::LastHousekeeping, None)
+            .await?;
+        context.scheduler.interrupt_inbox().await;
+
         Ok(())
     }
 
@@ -4875,6 +4889,7 @@ pub(crate) enum SyncAction {
     Rename(String),
     /// Set chat contacts by their addresses.
     SetContacts(Vec<String>),
+    Delete,
 }
 
 impl Context {
@@ -4934,6 +4949,7 @@ impl Context {
             }
             SyncAction::Rename(to) => rename_ex(self, Nosync, chat_id, to).await,
             SyncAction::SetContacts(addrs) => set_contacts_by_addrs(self, chat_id, addrs).await,
+            SyncAction::Delete => chat_id.delete_ex(self, Nosync).await,
         }
     }
 

src/chat/chat_tests.rs

@@ -3030,6 +3030,39 @@ async fn test_sync_block_before_first_msg() -> Result<()> {
     Ok(())
 }
 
+#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+async fn test_sync_delete_chat() -> Result<()> {
+    let alice0 = &TestContext::new_alice().await;
+    let alice1 = &TestContext::new_alice().await;
+    for a in [alice0, alice1] {
+        a.set_config_bool(Config::SyncMsgs, true).await?;
+    }
+    let bob = TestContext::new_bob().await;
+
+    let ba_chat = bob.create_chat(alice0).await;
+    let sent_msg = bob.send_text(ba_chat.id, "hi").await;
+    let a0b_chat_id = alice0.recv_msg(&sent_msg).await.chat_id;
+    let a1b_chat_id = alice1.recv_msg(&sent_msg).await.chat_id;
+    a0b_chat_id.accept(alice0).await?;
+    sync(alice0, alice1).await;
+    a0b_chat_id.delete(alice0).await?;
+    sync(alice0, alice1).await;
+    alice1.assert_no_chat(a1b_chat_id).await;
+
+    let bob_grp_chat_id = bob
+        .create_group_with_members(ProtectionStatus::Unprotected, "grp", &[alice0])
+        .await;
+    let sent_msg = bob.send_text(bob_grp_chat_id, "hi").await;
+    let a0_grp_chat_id = alice0.recv_msg(&sent_msg).await.chat_id;
+    let a1_grp_chat_id = alice1.recv_msg(&sent_msg).await.chat_id;
+    a0_grp_chat_id.accept(alice0).await?;
+    sync(alice0, alice1).await;
+    a0_grp_chat_id.delete(alice0).await?;
+    sync(alice0, alice1).await;
+    alice1.assert_no_chat(a1_grp_chat_id).await;
+    Ok(())
+}
+
 #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
 async fn test_sync_adhoc_grp() -> Result<()> {
     let alice0 = &TestContext::new_alice().await;
@@ -3212,6 +3245,10 @@ async fn test_sync_broadcast() -> Result<()> {
     assert!(get_past_chat_contacts(alice1, a1_broadcast_id)
         .await?
         .is_empty());
+
+    a0_broadcast_id.delete(alice0).await?;
+    sync(alice0, alice1).await;
+    alice1.assert_no_chat(a1_broadcast_id).await;
     Ok(())
 }
 

src/test_utils.rs

@@ -743,6 +743,15 @@ impl TestContext {
         Chat::load_from_db(self, chat_id).await.unwrap()
     }
 
+    pub async fn assert_no_chat(&self, id: ChatId) {
+        assert!(Chat::load_from_db(self, id).await.is_err());
+        assert!(!self
+            .sql
+            .exists("SELECT COUNT(*) FROM chats WHERE id=?", (id,))
+            .await
+            .unwrap());
+    }
+
     /// Sends out the text message.
     ///
     /// This is not hooked up to any SMTP-IMAP pipeline, so the other account must call