loadMessagesWithKeyword method

Future<List<ChatMessage>> loadMessagesWithKeyword(
  1. String keywords,
  2. {String? sender,
  3. int timestamp = -1,
  4. int count = 20,
  5. ChatSearchDirection direction = ChatSearchDirection.Up}

Loads messages from the local database by the following parameters: keywords, timestamp, max count, sender, search direction.

Note Pay attention to the memory usage when the maxCount is large.

Param keywords The keywords in message.

Param sender The message sender. The param can also be used to search in group chat.

Param timestamp The timestamp for search.

Param count The maximum number of messages to search.

Param direction The direction in which the message is loaded: ChatSearchDirection. ChatSearchDirection.Up: Gets the messages loaded before the timestamp of the specified message ID. ChatSearchDirection.Down: Gets the messages loaded after the timestamp of the specified message ID.

Returns The list of retrieved messages.

Throws A description of the exception. See ChatError.


Future<List<ChatMessage>> loadMessagesWithKeyword(
  String keywords, {
  String? sender,
  int timestamp = -1,
  int count = 20,
  ChatSearchDirection direction = ChatSearchDirection.Up,
}) async {
  Map req = this._toJson();
  req["keywords"] = keywords;
  req['count'] = count;
  req['timestamp'] = timestamp;
  req['direction'] = direction == ChatSearchDirection.Up ? "up" : "down";
  req.putIfNotNull("sender", sender);

  Map<String, dynamic> result = await _emConversationChannel.invokeMethod(
      ChatMethodKeys.loadMsgWithKeywords, req);

  try {
    List<ChatMessage> msgList = [];
    result[ChatMethodKeys.loadMsgWithKeywords]?.forEach((element) {
    return msgList;
  } on ChatError catch (e) {
    throw e;