Merge pull request #222 from GetStream/hotfix/preview

Hotfix/preview

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.2.20+4
+
+- Fix channelPreview when the message list is empty
+
 ## 0.2.20+3
 
 - Fix reaction picker score indicator

example/ios/Flutter/.last_build_id

@@ -1 +1 @@
-13a41b8138c4868054e44b5158f3bdd6
+c1153e968f5d6bcc19c41ac2592825f6

example/lib/customize_channel_preview.dart

@@ -62,7 +62,7 @@ class ChannelListPage extends StatelessWidget {
             }
           },
           channelPreviewBuilder: _channelPreviewBuilder,
-          sort: [SortOption('last_message_at')],
+          // sort: [SortOption('last_message_at')],
           pagination: PaginationParams(
             limit: 20,
           ),
@@ -73,8 +73,10 @@ class ChannelListPage extends StatelessWidget {
   }
 
   Widget _channelPreviewBuilder(BuildContext context, Channel channel) {
-    final lastMessage = channel.state.messages.reversed
-        .firstWhere((message) => !message.isDeleted);
+    final lastMessage = channel.state.messages.reversed.firstWhere(
+      (message) => !message.isDeleted,
+      orElse: () => null,
+    );
 
     final subtitle = (lastMessage == null ? "nothing yet" : lastMessage.text);
     final opacity = channel.state.unreadCount > .0 ? 1.0 : 0.5;

example/lib/main.dart

@@ -127,7 +127,7 @@ class ChannelListPage extends StatelessWidget {
               '\$in': [StreamChat.of(context).user.id],
             }
           },
-          sort: [SortOption('last_message_at')],
+          // sort: [SortOption('last_message_at')],
           pagination: PaginationParams(
             limit: 20,
           ),

lib/src/channel_preview.dart

@@ -128,7 +128,10 @@ class ChannelPreview extends StatelessWidget {
       stream: channel.state.messagesStream,
       initialData: channel.state.messages,
       builder: (context, snapshot) {
-        final lastMessage = snapshot.data?.lastWhere((m) => m.shadowed != true);
+        final lastMessage = snapshot.data?.lastWhere(
+          (m) => m.shadowed != true,
+          orElse: () => null,
+        );
         if (lastMessage == null) {
           return SizedBox();
         }

pubspec.yaml

@@ -1,7 +1,7 @@
 name: stream_chat_flutter
 homepage: https://github.com/GetStream/stream-chat-flutter
 description: Stream Chat official Flutter SDK. Build your own chat experience using Dart and Flutter.
-version: 0.2.20+3
+version: 0.2.20+4
 repository: https://github.com/GetStream/stream-chat-flutter
 issue_tracker: https://github.com/GetStream/stream-chat-flutter/issues