searchMsgFromDB method

Implementation

@Deprecated('Use ChatManager.loadMessagesWithKeyword instead.')
/// Retrieves messages from the database according to the parameters.
///
/// **Note**
/// Pay attention to the memory usage when the maxCount is large. Currently, a maximum of 400 historical messages can be retrieved each time.
///
/// Param [keywords] The keywords in message.
///
/// Param [timestamp] The Unix timestamp for search, in milliseconds.
///
/// Param [maxCount] The maximum number of messages to retrieve each time.
///
/// Param [from] A user ID or group ID at which the retrieval is targeted. Usually, it is the conversation ID.
///
/// **Return** The list of messages.
///
/// **Throws** A description of the exception. See [ChatError].
Future<List<ChatMessage>> searchMsgFromDB(
  String keywords, {
  int timestamp = -1,
  int maxCount = 20,
  String from = '',
  ChatSearchDirection direction = ChatSearchDirection.Up,
}) async {
  Map req = Map();
  req['keywords'] = keywords;
  req['timestamp'] = timestamp;
  req['maxCount'] = maxCount;
  req['from'] = from;
  req['direction'] = direction == ChatSearchDirection.Up ? "up" : "down";

  Map result = await ChatChannel.invokeMethod(
    ChatMethodKeys.searchChatMsgFromDB,
    req,
  );
  try {
    ChatError.hasErrorFromResult(result);
    List<ChatMessage> list = [];
    result[ChatMethodKeys.searchChatMsgFromDB]?.forEach((element) {
      list.add(ChatMessage.fromJson(element));
    });
    return list;
  } on ChatError catch (e) {
    throw e;
  }
}