Message metadata

Community channels support message metadata with the same capabilities as direct and group channels. Use message.setMetadata() and message.deleteMetadata() on the message instance.

See Message metadata for details on updating, removing, and listening for metadata changes.

Update message metadata

Dart

await message.setMetadata(
  {'reaction_like': 'user1,user2'},
  (error) {
    if (error == null) {
      print('Metadata updated');
    }
  },
);

Remove metadata keys

Dart

await message.deleteMetadata(
  ['reaction_like'],
  (error) {
    if (error == null) {
      print('Metadata keys removed');
    }
  },
);

Listen for metadata changes

Dart

NCEngine.addMessageHandler('community-meta-handler', MessageHandler(
  onMessageMetadataUpdated: (event) {
    print('Metadata updated: ${event.metadata}');
  },
  onMessageMetadataDeleted: (event) {
    print('Metadata removed: ${event.keys}');
  },
));