fetchConversation method

Implementation

@Deprecated('Use fetchConversationsByOptions instead')

/// ~english
/// Get the list of conversations from the server with pagination.
///
/// The SDK retrieves the list of conversations in the reverse chronological order of their active time (the timestamp of the last message).
/// If there is no message in the conversation, the SDK retrieves the list of conversations in the reverse chronological order of their creation time.
///
/// Param [cursor] The position from which to start getting data. The SDK retrieves conversations from the latest active one if this parameter is not set.
///
/// Param [pageSize] The number of conversations that you expect to get on each page. The value range is [1,50].
///
/// **Return** The conversation list of the current user.
///
/// **Throws** A description of the exception. See [EMError].
/// ~end
///
/// ~chinese
/// 从服务器分页获取会话列表。
///
/// SDK 按照会话活跃时间（会话的最后一条消息的时间戳）倒序返回会话列表。
/// 若会话中没有消息，则 SDK 按照会话创建时间的倒序返回会话列表。
///
/// Param [cursor] 查询的开始位置，如不传， SDK 从最新活跃的会话开始获取。
///
/// Param [pageSize] 每页期望返回的会话数量。取值范围为 [1,50]。
///
/// **Return** 当前用户的会话列表。
///
/// **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
Future<EMCursorResult<EMConversation>> fetchConversation({
  String? cursor,
  int pageSize = 20,
}) async {
  Map map = {
    "pageSize": pageSize,
  };
  map.putIfNotNull('cursor', cursor);
  Map result = await ChatChannel.invokeMethod(
    ChatMethodKeys.getConversationsFromServerWithCursor,
    map,
  );
  try {
    EMError.hasErrorFromResult(result);
    return EMCursorResult.fromJson(
        result[ChatMethodKeys.getConversationsFromServerWithCursor],
        dataItemCallback: (map) {
      return EMConversation.fromJson(map);
    });
  } on EMError catch (e) {
    throw e;
  }
}