parseExtInfo static method

TimPushExtInfo parseExtInfo(String ext)

Implementation

static TimPushExtInfo parseExtInfo(String ext) {
  String? userID;
  String? groupID;
  try {
    final Object? decoded = json.decode(ext);
    if (decoded is! Map) {
      return TimPushExtInfo();
    }
    final Map<String, dynamic> payload = decoded.map(
      (Object? key, Object? value) =>
          MapEntry<String, dynamic>(key.toString(), value),
    );
    final String? conversationID = payload['conversationID']?.toString();
    if (conversationID != null) {
      final RegExpMatch? c2cMatch =
          RegExp(r'^c2c_(.*)').firstMatch(conversationID);
      final RegExpMatch? groupMatch =
          RegExp(r'^group_(.*)').firstMatch(conversationID);
      if (c2cMatch != null) {
        userID = c2cMatch.group(1);
      } else if (groupMatch != null) {
        groupID = groupMatch.group(1);
      }
    } else {
      final Object? entityObject = payload['entity'];
      if (entityObject is Map) {
        final Map<String, dynamic> entity = entityObject.map(
          (Object? key, Object? value) =>
              MapEntry<String, dynamic>(key.toString(), value),
        );
        final int? chatType = entity['chatType'] as int?;
        final String? sender = entity['sender']?.toString();
        if (chatType == 1) {
          userID = sender;
        } else if (chatType == 2) {
          groupID = sender;
        }
      }
    }
  } catch (_) {
    // ext 不是合法 JSON 时返回空解析结果。
  }
  return TimPushExtInfo(userID: userID, groupID: groupID);
}