searchMsgFromDB method

Future<List<EMMessage>> searchMsgFromDB(String keywords, [ EMMessageChatType type = EMMessageChatType.Chat, int timeStamp = 0, int maxCount = 20, String from = '', EMMessageSearchDirection direction = EMMessageSearchDirection.Up, ])

搜索包含keywords的消息，消息类型为type，起始时间timeStamp，条数maxCount, 消息发送方from，方向direction。

Implementation

Future<List<EMMessage>> searchMsgFromDB(
  String keywords, [
  EMMessageChatType type = EMMessageChatType.Chat,
  int timeStamp = 0,
  int maxCount = 20,
  String from = '',
  EMMessageSearchDirection direction = EMMessageSearchDirection.Up,
]) async {
  Map req = Map();
  req['keywords'] = keywords;
  req['type'] = EMMessage.chatTypeToInt(type);
  req['timeStamp'] = timeStamp;
  req['maxCount'] = maxCount;
  req['from'] = from;
  req['direction'] = direction == EMMessageSearchDirection.Up ? "up" : "down";

  Map result =
      await _channel.invokeMethod(EMSDKMethod.searchChatMsgFromDB, req);
  EMError.hasErrorFromResult(result);
  List<EMMessage> list = [];
  result[EMSDKMethod.searchChatMsgFromDB]?.forEach((element) {
    list.add(EMMessage.fromJson(element));
  });

  return list;
}