feat: Don't show "member added" messages in channels

src/chat.rs

@@ -3918,15 +3918,7 @@ pub(crate) async fn add_contact_to_chat_ext(
         msg.viewtype = Viewtype::Text;
 
         let contact_addr = contact.get_addr().to_lowercase();
-        let added_by = if from_handshake && chat.typ == Chattype::OutBroadcast {
-            // The contact was added via a QR code rather than explicit user action,
-            // so it could be confusing to say 'You added member Alice'.
-            // And in a broadcast, SELF is the only one who can add members,
-            // so, no information is lost by just writing 'Member Alice added' instead.
-            ContactId::UNDEFINED
-        } else {
-            ContactId::SELF
-        };
+        let added_by = ContactId::SELF;
         msg.text = stock_str::msg_add_member_local(context, contact.id, added_by).await;
         msg.param.set_cmd(SystemMessage::MemberAddedToGroup);
         msg.param.set(Param::Arg, contact_addr);
@@ -3940,6 +3932,11 @@ pub(crate) async fn add_contact_to_chat_ext(
                 .await?
                 .context("Failed to find broadcast shared secret")?;
             msg.param.set(PARAM_BROADCAST_SECRET, secret);
+
+            // We don't show "member added" info-messages in channels,
+            // because there can be a lot members added,
+            // and these messages would clutter the timeline.
+            msg.hidden = true;
         }
         send_msg(context, chat_id, &mut msg).await?;
 
@@ -5107,7 +5104,7 @@ async fn set_contacts_by_fingerprints(
     if contacts == contacts_old {
         return Ok(());
     }
-    let broadcast_contacts_added = context
+    context
         .sql
         .transaction(move |transaction| {
             // For broadcast channels, we only add members,
@@ -5124,31 +5121,12 @@ async fn set_contacts_by_fingerprints(
             let mut statement = transaction.prepare(
                 "INSERT OR IGNORE INTO chats_contacts (chat_id, contact_id) VALUES (?, ?)",
             )?;
-            let mut broadcast_contacts_added = Vec::new();
             for contact_id in &contacts {
-                if statement.execute((id, contact_id))? > 0 && chat.typ == Chattype::OutBroadcast {
-                    broadcast_contacts_added.push(*contact_id);
-                }
+                statement.execute((id, contact_id))?;
             }
-            Ok(broadcast_contacts_added)
+            Ok(())
         })
         .await?;
-    let timestamp = time();
-    for added_id in broadcast_contacts_added {
-        let msg = stock_str::msg_add_member_local(context, added_id, ContactId::UNDEFINED).await;
-        add_info_msg_with_cmd(
-            context,
-            id,
-            &msg,
-            SystemMessage::MemberAddedToGroup,
-            Some(timestamp),
-            timestamp,
-            None,
-            Some(ContactId::SELF),
-            Some(added_id),
-        )
-        .await?;
-    }
     context.emit_event(EventType::ChatModified(id));
     Ok(())
 }

src/chat/chat_tests.rs

@@ -3003,13 +3003,13 @@ async fn test_broadcast_change_name() -> Result<()> {
 
         tcm.section("Bob receives the name-change system message");
         let msg = bob.recv_msg(&sent).await;
-        assert_eq!(msg.subject, "Re: My great broadcast");
+        assert_eq!(msg.subject, "My great broadcast");
         let bob_chat = Chat::load_from_db(bob, msg.chat_id).await?;
         assert_eq!(bob_chat.name, "My great broadcast");
 
         tcm.section("Fiona receives the name-change system message");
         let msg = fiona.recv_msg(&sent).await;
-        assert_eq!(msg.subject, "Re: My great broadcast");
+        assert_eq!(msg.subject, "My great broadcast");
         let fiona_chat = Chat::load_from_db(fiona, msg.chat_id).await?;
         assert_eq!(fiona_chat.name, "My great broadcast");
     }
@@ -3343,41 +3343,27 @@ async fn test_broadcast_recipients_sync1() -> Result<()> {
     alice2.assert_warn("unknown grpid").await;
 
     let member_added = alice1.pop_sent_msg().await;
-    let a2_charlie_added = alice2.recv_msg(&member_added).await;
+    alice2.recv_msg_trash(&member_added).await;
     let _c_member_added = charlie.recv_msg(&member_added).await;
-    let a2_chatlist = Chatlist::try_load(alice2, 0, Some("Channel"), None).await?;
-    assert_eq!(a2_chatlist.get_msg_id(0)?.unwrap(), a2_charlie_added.id);
 
     // Alice1 will now sync the full member list to Alice2:
     sync(alice1, alice2).await;
     let a2_bob_contact = alice2.add_or_lookup_contact_id(bob).await;
     let a2_charlie_contact = alice2.add_or_lookup_contact_id(charlie).await;
     let a2_chatlist = Chatlist::try_load(alice2, 0, Some("Channel"), None).await?;
-    let msg_id = a2_chatlist.get_msg_id(0)?.unwrap();
-    let a2_bob_added = Message::load_from_db(alice2, msg_id).await?;
-    assert_ne!(a2_bob_added.id, a2_charlie_added.id);
-    assert_eq!(
-        a2_bob_added.text,
-        stock_str::msg_add_member_local(alice2, a2_bob_contact, ContactId::UNDEFINED).await
-    );
-    assert_eq!(a2_bob_added.from_id, ContactId::SELF);
-    assert_eq!(
-        a2_bob_added.param.get_cmd(),
-        SystemMessage::MemberAddedToGroup
-    );
-    assert_eq!(
-        ContactId::new(
-            a2_bob_added
-                .param
-                .get_int(Param::ContactAddedRemoved)
-                .unwrap()
-                .try_into()
-                .unwrap()
-        ),
-        a2_bob_contact
-    );
+    let a2_chat_id = a2_chatlist.get_chat_id(0).unwrap();
 
-    let a2_chat_members = get_chat_contacts(alice2, a2_charlie_added.chat_id).await?;
+    // Also for Alice2, no info message should be shown;
+    // she should see only the "Messages are end-to-end encrypted" message.
+    let a2_chat_msgs = get_chat_msgs(alice2, a2_chat_id).await?;
+    assert_eq!(a2_chat_msgs.len(), 1);
+    let ChatItem::Message { msg_id } = a2_chat_msgs[0] else {
+        unreachable!()
+    };
+    let a2_msg = Message::load_from_db(alice2, msg_id).await?;
+    assert_eq!(a2_msg.get_info_type(), SystemMessage::ChatE2ee);
+
+    let a2_chat_members = get_chat_contacts(alice2, a2_chat_id).await?;
     assert!(a2_chat_members.contains(&a2_bob_contact));
     assert!(a2_chat_members.contains(&a2_charlie_contact));
     assert_eq!(a2_chat_members.len(), 2);

src/receive_imf.rs

@@ -3732,10 +3732,9 @@ async fn apply_out_broadcast_changes(
         if from_id == ContactId::SELF {
             let added_id = lookup_key_contact_by_fingerprint(context, added_fpr).await?;
             if let Some(added_id) = added_id {
-                if chat::is_contact_in_chat(context, chat.id, added_id).await? {
-                    info!(context, "No-op broadcast addition (TRASH)");
-                    better_msg.get_or_insert("".to_string());
-                } else {
+                info!(context, "Broadcast addition (TRASH)");
+                better_msg.get_or_insert("".to_string());
+                if !chat::is_contact_in_chat(context, chat.id, added_id).await? {
                     chat::add_to_chat_contacts_table(
                         context,
                         mime_parser.timestamp_sent,
@@ -3743,11 +3742,6 @@ async fn apply_out_broadcast_changes(
                         &[added_id],
                     )
                     .await?;
-                    let msg =
-                        stock_str::msg_add_member_local(context, added_id, ContactId::UNDEFINED)
-                            .await;
-                    better_msg.get_or_insert(msg);
-                    added_removed_id = Some(added_id);
                     send_event_chat_modified = true;
                 }
             } else {

test-data/golden/test_broadcast_joining_golden_alice

@@ -2,5 +2,4 @@ OutBroadcast#Chat#1001: My Channel [1 member(s)]🔇 Icon: e9b6c7a78aa2e4f415644
 --------------------------------------------------------------------------------
 Msg#1001: info (Contact#Contact#Info): Messages are end-to-end encrypted. [NOTICED][INFO]
 Msg#1002🔒: Me (Contact#Contact#Self): Channel image changed. [INFO] √
-Msg#1005🔒: Me (Contact#Contact#Self): Member bob@example.net added. [INFO] √
 --------------------------------------------------------------------------------

test-data/golden/test_sync_broadcast_alice1

@@ -1,7 +1,6 @@
 OutBroadcast#Chat#1001: Channel [0 member(s)]🔇
 --------------------------------------------------------------------------------
 Msg#1001: info (Contact#Contact#Info): Messages are end-to-end encrypted. [NOTICED][INFO]
-Msg#1006🔒: Me (Contact#Contact#Self): Member bob@example.net added. [INFO] √
 Msg#1009🔒: Me (Contact#Contact#Self): hi  √
 Msg#1010🔒: Me (Contact#Contact#Self): You removed member bob@example.net. [INFO] √
 --------------------------------------------------------------------------------

test-data/golden/test_sync_broadcast_alice2

@@ -1,7 +1,6 @@
 OutBroadcast#Chat#1001: Channel [0 member(s)]🔇
 --------------------------------------------------------------------------------
 Msg#1002: info (Contact#Contact#Info): Messages are end-to-end encrypted. [NOTICED][INFO]
-Msg#1006🔒: Me (Contact#Contact#Self): Member bob@example.net added. [INFO] √
 Msg#1009🔒: Me (Contact#Contact#Self): hi  √
 Msg#1010🔒: Me (Contact#Contact#Self): You removed member bob@example.net. [INFO] √
 --------------------------------------------------------------------------------