feat: Add support for messages filter in MessageListView and MessageListCore (#303)

* [MessageListView, MessageListCore] Add support for message filter Signed-off-by: Sahil Kumar <[email protected]> * [UI-Kit -> Pubspec] Remove `stream_chat_flutter_core` relative import Signed-off-by: Sahil Kumar <[email protected]>
2021-03-02 16:27:58 +01:00
parent a14e54591d
commit c5a9a42c45
2 changed files with 20 additions and 6 deletions
@@ -64,6 +64,7 @@ class MessageListCore extends StatefulWidget {
    this.showScrollToBottom = true,
    this.parentMessage,
    this.messageListController,
+    this.messageFilter,
  })  : assert(loadingBuilder != null),
        assert(emptyBuilder != null),
        assert(messageListBuilder != null),
@@ -95,6 +96,9 @@ class MessageListCore extends StatefulWidget {
  /// first message or the parent of the conversation.
  final Message parentMessage;

+  /// Predicate used to filter messages
+  final bool Function(Message) messageFilter;
+
  @override
  _MessageListCoreState createState() => _MessageListCoreState();
 }
@@ -106,6 +110,8 @@ class _MessageListCoreState extends State<MessageListCore> {

  bool get _isThreadConversation => widget.parentMessage != null;

+  OwnUser get _currentUser => streamChannel.channel.client.state.user;
+
  int initialIndex;
  double initialAlignment;

@@ -121,13 +127,16 @@ class _MessageListCoreState extends State<MessageListCore> {
            .map((threads) => threads[widget.parentMessage.id])
        : streamChannel.channel.state?.messagesStream;

+    bool defaultFilter(Message m) {
+      final isMyMessage = m.user.id == _currentUser.id;
+      final isDeletedOrShadowed = m.isDeleted || m.shadowed;
+      if (isDeletedOrShadowed && !isMyMessage) return false;
+      return true;
+    }
+
    return StreamBuilder<List<Message>>(
-      stream: messagesStream?.map((messages) => messages
-          ?.where((e) =>
-              (!e.isDeleted && e.shadowed != true) ||
-              (e.isDeleted &&
-                  e.user.id == streamChannel.channel.client.state.user.id))
-          ?.toList()),
+      stream: messagesStream?.map((messages) =>
+          messages?.where(widget.messageFilter ?? defaultFilter)?.toList()),
      builder: (context, snapshot) {
        if (!snapshot.hasData) {
          return widget.loadingBuilder(context);