Pin a channel

Pin channels to the top of the channel list using the pin / unpin methods on BaseChannel instances. The pinned state is reflected in the isPinned property.

Pin a channel

Pin a channel to the top of the list. The pinned state syncs to the server and persists across devices. This is a BaseChannel instance method.

Method

Dart

Future\<int\> pin(PinParams params, ErrorHandler handler);

Parameters

Parameter	Type	Description
params	PinParams	Pin parameters
handler	ErrorHandler	Result callback

PinParams properties

Property	Type	Description
updateOperationTime	bool	Whether to update the channel's operation timestamp

Code example

Dart

BaseChannel channel = ...;

int? ret = await channel.pin(
  PinParams(updateOperationTime: true),
  (NCError? error) {
    if (error == null || error.isSuccess) {
      print('Channel pinned');
    }
  },
);

Unpin a channel

Method

Dart

Future\<int\> unpin(ErrorHandler handler);

Code example

Dart

int? ret = await channel.unpin((NCError? error) {
  if (error == null || error.isSuccess) {
    print('Channel unpinned');
  }
});

Get pinned channels

Method

Dart

static Future\<int\> getPinnedChannels(List\<ChannelType\> types, OprationHandler\<List\<BaseChannel\\>> handler);

Code example

Dart

final types = [ChannelType.direct, ChannelType.group];

int? ret = await BaseChannel.getPinnedChannels(types, (List\<BaseChannel\>? channels, NCError? error) {
  if (error == null || error.isSuccess) {
    print('Pinned channels: ${channels?.length}');
  }
});

Listen for pin state sync

The SDK syncs pin state changes across devices. Register a ChannelHandler to receive real-time notifications.

Register listener

Dart

NCEngine.addChannelHandler(
  'my_pin_listener',
  ChannelHandler(
    onChannelPinnedSync: (ChannelIdentifier channel, bool? top) {
      print('Channel ${channel.channelId} pin state changed: $top');
    },
  ),
);

Remove listener

Dart

NCEngine.removeChannelHandler('my_pin_listener');