Display the list of unread conversations

lib/helpers/conversations_helper.dart

@@ -4,6 +4,7 @@ import 'package:comunic/helpers/users_helper.dart';
 import 'package:comunic/helpers/websocket_helper.dart';
 import 'package:comunic/lists/conversation_messages_list.dart';
 import 'package:comunic/lists/conversations_list.dart';
+import 'package:comunic/lists/unread_conversations_list.dart';
 import 'package:comunic/lists/users_list.dart';
 import 'package:comunic/models/api_request.dart';
 import 'package:comunic/models/api_response.dart';
@@ -11,6 +12,7 @@ import 'package:comunic/models/conversation.dart';
 import 'package:comunic/models/conversation_message.dart';
 import 'package:comunic/models/displayed_content.dart';
 import 'package:comunic/models/new_conversation_message.dart';
+import 'package:comunic/models/unread_conversation.dart';
 import 'package:comunic/utils/account_utils.dart';
 import 'package:meta/meta.dart';
 
@@ -385,6 +387,24 @@ class ConversationsHelper {
     return true;
   }
 
+  /// Get the list of unread conversations
+  ///
+  /// Throws in case of failure
+  static Future<UnreadConversationsList> getListUnread() async {
+    final list = (await APIRequest.withLogin("conversations/get_list_unread")
+            .execWithThrow())
+        .getArray();
+
+    return UnreadConversationsList()
+      ..addAll(list.map((f) => UnreadConversation(
+            id: f["id"],
+            convName: f["conv_name"],
+            lastActive: f["last_active"],
+            userID: f["userID"],
+            message: f["message"],
+          )));
+  }
+
   /// Register a conversation : ask the server to notify about updates to the
   /// conversation through WebSocket
   Future<void> registerConversationEvents(int id) async {

lib/lists/unread_conversations_list.dart

@@ -0,0 +1,11 @@
+import 'package:comunic/lists/abstract_list.dart';
+import 'package:comunic/models/unread_conversation.dart';
+
+/// List of unread conversations
+///
+/// @author Pierre Hubert
+
+class UnreadConversationsList extends AbstractList<UnreadConversation> {
+  /// Get the ID of the users included in this list
+  Set<int> get usersID => new Set<int>()..addAll(map((f) => f.userID));
+}

lib/models/unread_conversation.dart

@@ -0,0 +1,25 @@
+import 'package:flutter/material.dart';
+
+/// Unread conversation information
+///
+/// @author Pierre Hubert
+
+class UnreadConversation {
+  final int id;
+  final String convName;
+  final int lastActive;
+  final int userID;
+  final String message;
+
+  const UnreadConversation({
+    @required this.id,
+    @required this.convName,
+    @required this.lastActive,
+    @required this.userID,
+    @required this.message,
+  })  : assert(id != null),
+        assert(convName != null),
+        assert(lastActive != null),
+        assert(userID != null),
+        assert(message != null);
+}

lib/ui/screens/unread_conversations_screen.dart

@@ -0,0 +1,76 @@
+import 'package:comunic/helpers/conversations_helper.dart';
+import 'package:comunic/helpers/users_helper.dart';
+import 'package:comunic/lists/unread_conversations_list.dart';
+import 'package:comunic/lists/users_list.dart';
+import 'package:comunic/ui/widgets/account_image_widget.dart';
+import 'package:comunic/ui/widgets/async_screen_widget.dart';
+import 'package:comunic/utils/date_utils.dart';
+import 'package:comunic/utils/intl_utils.dart';
+import 'package:flutter/material.dart';
+
+/// Unread conversations screen
+///
+/// @author Pierre Hubert
+
+class UnreadConversationsScreen extends StatefulWidget {
+  @override
+  _UnreadConversationsScreenState createState() =>
+      _UnreadConversationsScreenState();
+}
+
+class _UnreadConversationsScreenState extends State<UnreadConversationsScreen> {
+  UnreadConversationsList _list;
+  UsersList _users;
+
+  Future<void> _refresh() async {
+    _list = await ConversationsHelper.getListUnread();
+    _users = await UsersHelper().getListWithThrow(_list.usersID);
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return AsyncScreenWidget(
+      onReload: _refresh,
+      onBuild: _buildList,
+      errorMessage: tr("Could not load the list of unread conversations!"),
+    );
+  }
+
+  Widget _buildList() {
+    // Check for no unread conversation
+    if (_list.isEmpty)
+      return Center(
+        child: Padding(
+          padding: const EdgeInsets.all(8.0),
+          child: Text(
+            tr("You do not have any unread conversation yet..."),
+            textAlign: TextAlign.center,
+          ),
+        ),
+      );
+
+    return ListView.builder(
+      itemBuilder: _tileBuilder,
+      itemCount: _list.length,
+    );
+  }
+
+  Widget _tileBuilder(BuildContext context, int index) {
+    final conv = _list[index];
+    final user = _users.getUser(conv.userID);
+    return ListTile(
+      leading: AccountImageWidget(user: user),
+      title: Text(user.displayName),
+      subtitle: RichText(
+        text: TextSpan(style: Theme.of(context).textTheme.body1, children: [
+          TextSpan(text: conv.convName.isNotEmpty ? conv.convName + "\n" : ""),
+          TextSpan(
+            text: conv.message,
+            style: TextStyle(fontStyle: FontStyle.italic),
+          ),
+        ]),
+      ),
+      trailing: Text(diffTimeFromNowToStr(conv.lastActive)),
+    );
+  }
+}

lib/ui/widgets/tablet_mode/tablet_appbar_widget.dart

@@ -2,6 +2,7 @@ import 'package:comunic/helpers/events_helper.dart';
 import 'package:comunic/helpers/notifications_helper.dart';
 import 'package:comunic/models/count_unread_notifications.dart';
 import 'package:comunic/ui/screens/notifications_screen.dart';
+import 'package:comunic/ui/screens/unread_conversations_screen.dart';
 import 'package:comunic/ui/widgets/safe_state.dart';
 import 'package:comunic/ui/widgets/tablet_mode/appbar_custom_dropdown_widget.dart';
 import 'package:flutter/material.dart';
@@ -71,13 +72,7 @@ class _ComunicTabletAppBarWidgetState
           key: conversationsDropdownKey,
           icon: Icon(Icons.message),
           notificationsBadge: _unreadNotifications.conversations,
-          onBuildOverlay: (c) => Center(
-            child: RaisedButton(
-              child: Text("Close"),
-              onPressed: () =>
-                  conversationsDropdownKey.currentState.toggleOverlay(),
-            ),
-          ),
+          onBuildOverlay: (c) => UnreadConversationsScreen(),
         ),
         PopupMenuButton(itemBuilder: (c) => []),
       ],