fetchPublicGroupsFromServer method Null safety
Gets public groups from the server with pagination.
Param pageSize
The number of public groups per page.
Param cursor
The cursor position from which to start to get data next time. Sets the parameter as null for the first time.
Return The result of {@link EMCursorResult}, including the cursor for getting data next time and the group list.
If EMCursorResult.cursor
is an empty string (""), all data is fetched.
Throws A description of the exception. See {@link EMError}.
Implementation
Future<EMCursorResult<EMGroupInfo>> fetchPublicGroupsFromServer({
int pageSize = 200,
String? cursor,
}) async {
Map req = {'pageSize': pageSize};
req.setValueWithOutNull("cursor", cursor);
Map result = await _channel.invokeMethod(
ChatMethodKeys.getPublicGroupsFromServer, req);
try {
EMError.hasErrorFromResult(result);
return EMCursorResult<EMGroupInfo>.fromJson(
result[ChatMethodKeys.getPublicGroupsFromServer],
dataItemCallback: (value) {
return EMGroupInfo.fromJson(value);
});
} on EMError catch (e) {
throw e;
}
}