Display the list of unread conversations

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)),
+    );
+  }
+}