display groups w/o name by list of members

For members-only, non-anonymous groups that do not have a name set we now
show an automatically generated name that is generated from the list of members
(offline, and online). Only the first name (before the first space) is used
to keep the generated name short.

The term *private room* is coined as a short hand for members only&non-anon group
chats.

This commit also uses the offline members list instead of the online member list
to generate avatar tiles (also only in members-only, non-anon groups.)

4 files changed, 41 insertions, 2 deletions

diff --git a/main/src/ui/avatar_image.vala b/main/src/ui/avatar_image.vala
index bf6cb9f4..f6140c26 100644
--- a/main/src/ui/avatar_image.vala
+++ b/main/src/ui/avatar_image.vala
@@ -194,6 +194,7 @@ public class AvatarImage : Misc {
             stream_interactor.get_module(AvatarManager.IDENTITY).received_avatar.disconnect(on_received_avatar);
             stream_interactor.connection_manager.connection_state_changed.disconnect(on_connection_changed);
             stream_interactor.get_module(RosterManager.IDENTITY).updated_roster_item.disconnect(on_roster_updated);
+            stream_interactor.get_module(MucManager.IDENTITY).private_room_occupant_updated.disconnect(on_occupant_updated);
         }
     }
 
@@ -205,10 +206,16 @@ public class AvatarImage : Misc {
             stream_interactor.get_module(AvatarManager.IDENTITY).received_avatar.connect(on_received_avatar);
             stream_interactor.connection_manager.connection_state_changed.connect(on_connection_changed);
             stream_interactor.get_module(RosterManager.IDENTITY).updated_roster_item.connect(on_roster_updated);
+            stream_interactor.get_module(MucManager.IDENTITY).private_room_occupant_updated.connect(on_occupant_updated);
         }
         if (muc_manager.is_groupchat(jid_, account) && avatar_manager.get_avatar(account, jid_) == null) {
             // Groupchat without avatar
-            Gee.List<Jid>? occupants = muc_manager.get_other_occupants(jid_, account);
+            Gee.List<Jid>? occupants;
+            if (muc_manager.is_private_room(account, jid_)) {
+                occupants = muc_manager.get_other_offline_members(jid_, account);
+            } else {
+                occupants = muc_manager.get_other_occupants(jid_, account);
+            }
             jid = jid_;
             if (occupants == null || occupants.size == 0) {
                 if (force_update || current_jids.length != 1 || !current_jids[0].equals(jid_) || gray != (allow_gray && (occupants == null || !is_self_online()))) {
@@ -292,6 +299,12 @@ public class AvatarImage : Misc {
         set_jid(stream_interactor, this.jid, account, true);
     }
 
+    private void on_occupant_updated(Account account, Jid room, Jid occupant) {
+        if (!account.equals(this.account)) return;
+        if (!room.equals_bare(this.jid)) return;
+        set_jid(stream_interactor, this.jid, account, true);
+    }
+
     private bool is_self_online() {
         return stream_interactor.connection_manager.get_state(account) == ConnectionManager.ConnectionState.CONNECTED;
     }
diff --git a/main/src/ui/conversation_selector/conversation_row.vala b/main/src/ui/conversation_selector/conversation_row.vala
index 6327e07d..992cf107 100644
--- a/main/src/ui/conversation_selector/conversation_row.vala
+++ b/main/src/ui/conversation_selector/conversation_row.vala
@@ -59,6 +59,11 @@ public class ConversationRow : ListBoxRow {
                         update_name_label();
                     }
                 });
+                stream_interactor.get_module(MucManager.IDENTITY).private_room_occupant_updated.connect((account, room, occupant) => {
+                    if (conversation != null && conversation.counterpart.equals_bare(room.bare_jid) && conversation.account.equals(account)) {
+                        update_name_label();
+                    }
+                });
                 break;
             case Conversation.Type.GROUPCHAT_PM:
                 break;
diff --git a/main/src/ui/conversation_titlebar/view.vala b/main/src/ui/conversation_titlebar/view.vala
index 7ee47311..7ced9830 100644
--- a/main/src/ui/conversation_titlebar/view.vala
+++ b/main/src/ui/conversation_titlebar/view.vala
@@ -42,6 +42,12 @@ public class ConversationTitlebar : Gtk.HeaderBar {
             }
         });
 
+        stream_interactor.get_module(MucManager.IDENTITY).private_room_occupant_updated.connect((account, room, occupant) => {
+            if (conversation != null && conversation.counterpart.equals_bare(room.bare_jid) && conversation.account.equals(account)) {
+                update_title();
+            }
+        });
+
         stream_interactor.get_module(MucManager.IDENTITY).subject_set.connect((account, jid, subject) => {
             if (conversation != null && conversation.counterpart.equals_bare(jid) && conversation.account.equals(account)) {
                 update_subtitle(subject);
diff --git a/main/src/ui/util/helper.vala b/main/src/ui/util/helper.vala
index 2f2bb84d..da854513 100644
--- a/main/src/ui/util/helper.vala
+++ b/main/src/ui/util/helper.vala
@@ -60,10 +60,25 @@ public static string get_conversation_display_name(StreamInteractor stream_inter
 
 public static string get_display_name(StreamInteractor stream_interactor, Jid jid, Account account) {
     if (stream_interactor.get_module(MucManager.IDENTITY).is_groupchat(jid, account)) {
-        string room_name = stream_interactor.get_module(MucManager.IDENTITY).get_room_name(account, jid);
+        MucManager muc_manager = stream_interactor.get_module(MucManager.IDENTITY);
+        string room_name = muc_manager.get_room_name(account, jid);
         if (room_name != null && room_name != jid.localpart) {
             return room_name;
         }
+        if (muc_manager.is_private_room(account, jid)) {
+            Gee.List<Jid>? other_occupants = muc_manager.get_other_offline_members(jid, account);
+            if (other_occupants != null && other_occupants.size > 0) {
+                var builder = new StringBuilder ();
+                foreach(Jid occupant in other_occupants) {
+
+                    if (builder.len != 0) {
+                        builder.append(", ");
+                    }
+                    builder.append(get_display_name(stream_interactor, occupant, account).split(" ")[0]);
+                }
+                return builder.str;
+            }
+        }
         return jid.bare_jid.to_string();
     } else if (stream_interactor.get_module(MucManager.IDENTITY).is_groupchat_occupant(jid, account)) {
         return jid.resourcepart;