Qlyra/lib/core/utils/ip_lookup_service.dart

import 'dart:convert';
import 'dart:io';

class IpLookupDetails {
  final String city;
  final String country;
  final String isp;
  final String network;
  final bool mobile;
  final bool proxy;
  final String timezone;

  const IpLookupDetails({
    required this.city,
    required this.country,
    required this.isp,
    required this.network,
    required this.mobile,
    required this.proxy,
    required this.timezone,
  });

  factory IpLookupDetails.fromIpWhoIs(Map<String, dynamic> data) {
    if (data['success'] != true) {
      throw FormatException(data['message']?.toString() ?? 'IP lookup failed');
    }
    final connection = data['connection'] is Map
        ? (data['connection'] as Map).cast<String, dynamic>()
        : const <String, dynamic>{};
    final security = data['security'] is Map
        ? (data['security'] as Map).cast<String, dynamic>()
        : const <String, dynamic>{};
    final timezoneData = data['timezone'] is Map
        ? (data['timezone'] as Map).cast<String, dynamic>()
        : const <String, dynamic>{};
    final asn = connection['asn'];
    final organization = connection['org']?.toString() ?? '';
    final network = [
      if (asn != null) 'AS$asn',
      if (organization.isNotEmpty) organization,
    ].join(' ');
    return IpLookupDetails(
      city: data['city']?.toString() ?? '',
      country: data['country']?.toString() ?? '',
      isp: connection['isp']?.toString() ?? organization,
      network: network,
      mobile: security['mobile'] == true,
      proxy: security['proxy'] == true,
      timezone: timezoneData['id']?.toString() ?? '',
    );
  }
}

abstract class IpLookupService {
  static const String providerName = 'ipwho.is';
  static const Duration _timeout = Duration(seconds: 8);

  static Future<IpLookupDetails> lookup(String ip) async {
    final uri = Uri.https(providerName, '/$ip');
    final client = HttpClient()..connectionTimeout = _timeout;
    try {
      final request = await client.getUrl(uri);
      request.headers.set(HttpHeaders.userAgentHeader, 'QlyraIpLookup');
      final response = await request.close().timeout(_timeout);
      if (response.statusCode != HttpStatus.ok) {
        await response.drain<void>();
        throw HttpException('HTTP ${response.statusCode}', uri: uri);
      }
      final body = await response
          .transform(const Utf8Decoder())
          .join()
          .timeout(_timeout);
      final decoded = jsonDecode(body);
      if (decoded is! Map) {
        throw const FormatException('Invalid IP lookup response');
      }
      return IpLookupDetails.fromIpWhoIs(decoded.cast<String, dynamic>());
    } finally {
      client.close(force: true);
    }
  }
}