fetchNext method

Future<List<Group>> fetchNext({ required dynamic onSuccess(List<Group> groupList)?, required dynamic onError(CometChatException excep)?, })

Returns list of Group object fetched after putting the filters.

Implementation

Future<List<Group>> fetchNext(
    {required Function(List<Group> groupList)? onSuccess,
    required Function(CometChatException excep)? onError}) async {
  try {
    final result = await channel.invokeMethod('fetchNextGroups', {
      'searchTerm': this.searchKeyword,
      'limit': this.limit,
      'joinedOnly': this.joinedOnly,
      'tags': this.tags,
      'withTags': this.withTags,
      'key': this.key
    });
    final List<Group> res = [];
    if (result != null) {
      key = result["key"];
      if (result["list"] != null) {
        for (var _obj in result["list"]) {
          try {
            res.add(Group.fromMap(_obj));
          } catch (e) {
            if (onError != null) {
              onError(CometChatException(ErrorCode.errorUnhandledException,
                  e.toString(), e.toString()));
            }
            return [];
          }
        }
      }
    }
    if (onSuccess != null) onSuccess(res);
    return res;
  } on PlatformException catch (platformException) {
    if (onError != null) {
      onError(CometChatException(platformException.code,
          platformException.details, platformException.message));
    }
  } catch (e) {
    debugPrint("Error: $e");
    if (onError != null) {
      onError(CometChatException(
          ErrorCode.errorUnhandledException, e.toString(), e.toString()));
    }
  }
  return [];
}