Update conversations list screen

lib/lists/conversations_list.dart

@@ -1,6 +1,5 @@
 import 'dart:collection';
 
-import 'package:comunic/lists/users_list.dart';
 import 'package:comunic/models/conversation.dart';
 
 /// Conversations list
@@ -9,7 +8,6 @@ import 'package:comunic/models/conversation.dart';
 
 class ConversationsList extends ListBase<Conversation> {
   final List<Conversation> _list = [];
-  UsersList users;
 
   set length(l) => _list.length = l;
 
@@ -27,4 +25,9 @@ class ConversationsList extends ListBase<Conversation> {
     forEach((c) => c.members.forEach((member) => list.add(member.userID)));
     return list;
   }
+
+  /// Get the entire lists of groups ID in this list
+  Set<int> get allGroupsID => where((element) => element.isGroupConversation)
+      .map((e) => e.groupID)
+      .toSet();
 }

lib/models/conversation.dart

@@ -75,7 +75,9 @@ class Conversation extends SerializableElement<Conversation> {
   bool get sawLastMessage => lastActivity <= membership.lastAccessTime;
 
   /// Check out whether a conversation is managed or not
-  bool get isManaged => groupID != null;
+  bool get isManaged => isGroupConversation;
+
+  bool get isGroupConversation => groupID != null;
 
   bool get hasLogo => logoURL != null;
 

lib/ui/screens/conversations_list_screen.dart

@@ -1,8 +1,11 @@
 import 'package:comunic/enums/load_error_level.dart';
 import 'package:comunic/helpers/conversations_helper.dart';
 import 'package:comunic/helpers/events_helper.dart';
+import 'package:comunic/helpers/groups_helper.dart';
 import 'package:comunic/helpers/users_helper.dart';
 import 'package:comunic/lists/conversations_list.dart';
+import 'package:comunic/lists/groups_list.dart';
+import 'package:comunic/lists/users_list.dart';
 import 'package:comunic/models/conversation.dart';
 import 'package:comunic/ui/routes/main_route/main_route.dart';
 import 'package:comunic/ui/routes/update_conversation_route.dart';
@@ -36,6 +39,8 @@ class _ConversationScreenState extends SafeState<ConversationsListScreen> {
   final ConversationsHelper _conversationsHelper = ConversationsHelper();
   final UsersHelper _usersHelper = UsersHelper();
   ConversationsList _list;
+  UsersList _users;
+  GroupsList _groups;
   LoadErrorLevel _error = LoadErrorLevel.NONE;
   final GlobalKey<RefreshIndicatorState> _refreshIndicatorKey =
       GlobalKey<RefreshIndicatorState>();
@@ -72,8 +77,10 @@ class _ConversationScreenState extends SafeState<ConversationsListScreen> {
           : await _conversationsHelper.downloadList();
       assert(list != null);
 
-      //Get information about the members of the conversations
+      // Get information about the members of the conversations
-      list.users = await _usersHelper.getList(list.allUsersID);
+      _users = await _usersHelper.getList(list.allUsersID);
+
+      _groups = await GroupsHelper().getListOrThrow(list.allGroupsID);
 
       setState(() => _list = list);
     } catch (e, s) {
@@ -124,6 +131,15 @@ class _ConversationScreenState extends SafeState<ConversationsListScreen> {
 
   /// Handle conversation deletion request
   Future<void> _requestLeaveConversation(Conversation conversation) async {
+    if (conversation.isGroupConversation) {
+      showAlert(
+          context: context,
+          title: tr("Group conversation"),
+          message: tr(
+              "This conversation is managed by a group. You can not leave it this way. If you do not want to receive notifications from this conversation anymore, you can stop following it in the conversation settings"));
+      return;
+    }
+
     final result = await showConfirmDialog(
         context: context,
         message: conversation.isLastAdmin
@@ -167,9 +183,13 @@ class _ConversationScreenState extends SafeState<ConversationsListScreen> {
                   physics: AlwaysScrollableScrollPhysics(),
                   controller: ScrollController(),
                   itemBuilder: (context, index) {
+                    if (_list[index].isGroupConversation &&
+                        !_list[index].following) return Container();
+
                     return ConversationTile(
                       conversation: _list.elementAt(index),
-                      usersList: _list.users,
+                      usersList: _users,
+                      groupsList: _groups,
                       onOpen: (c) {
                         _openConversation(c.id);
                       },

lib/ui/tiles/conversation_tile.dart

@@ -1,4 +1,5 @@
 import 'package:comunic/helpers/conversations_helper.dart';
+import 'package:comunic/lists/groups_list.dart';
 import 'package:comunic/lists/users_list.dart';
 import 'package:comunic/models/conversation.dart';
 import 'package:comunic/ui/routes/main_route/main_route.dart';
@@ -21,6 +22,7 @@ enum _PopupMenuChoices { UPDATE, LEAVE }
 class ConversationTile extends StatelessWidget {
   final Conversation conversation;
   final UsersList usersList;
+  final GroupsList groupsList;
   final OpenConversationCallback onOpen;
   final RequestUpdateConversationCallback onRequestUpdate;
   final RequestLeaveConversationCallback onRequestLeave;
@@ -29,6 +31,7 @@ class ConversationTile extends StatelessWidget {
     Key key,
     @required this.conversation,
     @required this.usersList,
+    @required this.groupsList,
     @required this.onOpen,
     @required this.onRequestUpdate,
     @required this.onRequestLeave,
@@ -86,17 +89,24 @@ class ConversationTile extends StatelessWidget {
           children: <Widget>[
             _buildSubInformation(Icons.access_time,
                 diffTimeFromNowToStr(conversation.lastActivity)),
-            _buildSubInformation(
+            conversation.isGroupConversation
-              Icons.group,
+                ? _buildSubInformation(
-              conversation.members.length == 1
+                    Icons.link,
-                  ? tr("1 member")
+                    tr("Group: %group_name%", args: {
-                  : tr(
+                      "group_name":
-                      "%num% members",
+                          groupsList.getGroup(conversation.groupID).name
-                      args: {
+                    }))
-                        "num": conversation.members.length.toString(),
+                : _buildSubInformation(
-                      },
+                    Icons.group,
-                    ),
+                    conversation.members.length == 1
-            ),
+                        ? tr("1 member")
+                        : tr(
+                            "%num% members",
+                            args: {
+                              "num": conversation.members.length.toString(),
+                            },
+                          ),
+                  ),
           ],
         ),
 

lib/utils/ui_utils.dart

@@ -1,7 +1,9 @@
+
 import 'package:comunic/helpers/preferences_helper.dart';
 import 'package:comunic/main.dart';
 import 'package:comunic/ui/routes/full_screen_image.dart';
 import 'package:comunic/ui/widgets/dialogs/auto_sized_dialog_content_widget.dart';
+import 'package:comunic/ui/widgets/dialogs/cancel_dialog_button.dart';
 import 'package:comunic/utils/intl_utils.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_emoji/flutter_emoji.dart';
@@ -220,6 +222,20 @@ Future<bool> showConfirmDialog({
   return result != null && result;
 }
 
+/// Show a simple alert dialog
+Future<void> showAlert({
+  @required BuildContext context,
+  @required String message,
+  String title,
+}) async =>
+    await showDialog(
+        context: context,
+        builder: (c) => AlertDialog(
+              title: title == null ? null : Text(title),
+              content: Text(message),
+              actions: [CancelDialogButton()],
+            ));
+
 /// Smart [InputCounterWidgetBuilder] that show text limit only when some
 /// text has already been entered by the user
 Widget smartInputCounterWidgetBuilder(