TF-2271 Add DNService for dns lookup to catch SRV Record to get jmap url

(cherry picked from commit 49110aa8db8b4e0707127ae39d5b2db2ecd6e339)

lib/features/login/data/network/dns_service.dart

@@ -0,0 +1,65 @@
+
+import 'package:core/utils/app_logger.dart';
+import 'package:dns_client/dns_client.dart';
+import 'package:tmail_ui_user/features/login/domain/exceptions/login_exception.dart';
+
+class DNSService {
+  static const String _jmapServiceName = '_jmap._tcp';
+
+  Future<String> _dnsLookupToUrlFromSRVType({required String hostName}) async {
+    try {
+      final url = await _dnsLookupToUrlByGoogle(hostName: hostName);
+      if (url.isEmpty) {
+        return await _dnsLookupToUrlByCloudflare(hostName: hostName);
+      }
+      return url;
+    } catch (e) {
+      return await _dnsLookupToUrlByCloudflare(hostName: hostName);
+    }
+  }
+
+  Future<String> _dnsLookupToUrlByGoogle({required String hostName}) async {
+    final dns = DnsOverHttps.google();
+    final listData = await dns.lookupDataByRRType(hostName, RRType.SRVType);
+    if (listData.isEmpty) {
+      throw NotFoundDataResourceRecordException();
+    }
+    return _parsingUrlFromDataResourceRecord(listData.first);
+  }
+
+  Future<String> _dnsLookupToUrlByCloudflare({required String hostName}) async {
+    final dns = DnsOverHttps.cloudflare();
+    final listData = await dns.lookupDataByRRType(hostName, RRType.SRVType);
+    if (listData.isEmpty) {
+      throw NotFoundDataResourceRecordException();
+    }
+    return _parsingUrlFromDataResourceRecord(listData.first);
+  }
+
+  String _parsingUrlFromDataResourceRecord(String data) {
+    if (data.isEmpty) {
+      throw NotFoundDataResourceRecordException();
+    }
+    final listFieldData = data.split(' ');
+    if (listFieldData.isEmpty) {
+      throw NotFoundUrlException();
+    }
+    final url = _removeDotAtEndOfString(listFieldData.last);
+    log('DNSService::_parsingUrlFromDataResourceRecord:url: $url');
+    return url;
+  }
+
+  Future<String> getJmapUrl(String emailAddress) async {
+   final domainName = emailAddress.split('@')[1];
+   final jmapHostName = '$_jmapServiceName.$domainName';
+   log('DNSHandler::getJmapUrl:jmapHostName: $jmapHostName');
+   return await _dnsLookupToUrlFromSRVType(hostName: jmapHostName);
+  }
+
+  String _removeDotAtEndOfString(String value) {
+    if (value.lastIndexOf('.') == value.length - 1) {
+      return value.substring(0, value.length - 1);
+    }
+    return value;
+  }
+}

lib/features/login/domain/exceptions/login_exception.dart

@@ -0,0 +1,4 @@
+
+class NotFoundDataResourceRecordException implements Exception {}
+
+class NotFoundUrlException implements Exception {}

pubspec.lock

@@ -360,6 +360,15 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "5.0.0"
+  dns_client:
+    dependency: "direct main"
+    description:
+      path: "."
+      ref: twake-supported
+      resolved-ref: "0ba4d48f287d408c70612dfc8bacc5ba11cd421b"
+      url: "https://github.com/dab246/dns_client.git"
+    source: git
+    version: "0.2.1"
   dotted_border:
     dependency: "direct main"
     description:
@@ -861,6 +870,14 @@ packages:
       relative: true
     source: path
     version: "1.0.0+1"
+  freezed_annotation:
+    dependency: transitive
+    description:
+      name: freezed_annotation
+      sha256: "1be037f901137bf2b9a0c309e9bf2694d6ec77687645211218191ade4f41a4b8"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.0"
   frontend_server_client:
     dependency: transitive
     description:

pubspec.yaml

@@ -86,6 +86,11 @@ dependencies:
       url: https://github.com/dab246/super_tag_editor.git
       ref: master
 
+  dns_client:
+    git:
+      url: https://github.com/dab246/dns_client.git
+      ref: twake-supported
+
   ### Dependencies from pub.dev ###
   cupertino_icons: 1.0.5