searchMsgsByOptions method

Future<List<EMMessage>> searchMsgsByOptions(MessageSearchOptions options)

~english Loads messages with the specified keyword from the local database.

Param options search options, see MessageSearchOptions.

Returns The list of retrieved messages.

Throws A description of the exception. See EMError. ~end

~chinese 通过类型从数据库获取消息。

Param options 搜索配置项, 详情查看 MessageSearchOptions.

Return 消息列表。

Throws 如果有异常会在这里抛出，包含错误码和错误描述，详见 EMError。 ~end

Implementation

Future<List<EMMessage>> searchMsgsByOptions(
    MessageSearchOptions options) async {
  Map req = {};
  req['ts'] = options.ts;
  req['count'] = options.count;
  req['direction'] = options.direction.index;
  req.putIfNotNull("from", options.from);
  req['types'] = options.types.map((e) => e.index).toList();
  Map result =
      await ChatChannel.invokeMethod(ChatMethodKeys.searchMsgsByOptions, req);
  try {
    EMError.hasErrorFromResult(result);
    List<EMMessage> messages = [];
    List list = result[ChatMethodKeys.searchMsgsByOptions];
    for (var element in list) {
      messages.add(EMMessage.fromJson(element));
    }
    return messages;
  } catch (e) {
    rethrow;
  }
}