Add DKIM key creation

lib/logic/api_maps/cloudflare.dart

@@ -154,6 +154,27 @@ class CloudflareApi extends ApiMap {
     ];
   }
 
+  Future<void> setDkim(
+      String dkimRecordString, CloudFlareDomain cloudFlareDomain) async {
+    final domainZoneId = cloudFlareDomain.zoneId;
+    final url = '$rootAddress/zones/$domainZoneId/dns_records';
+
+    final dkimRecord = DnsRecords(
+      type: 'TXT',
+      name: 'selector._domainkey',
+      content: dkimRecordString,
+      ttl: 18000,
+    );
+
+    var client = await getClient();
+    await client.post(
+      url,
+      data: dkimRecord.toJson(),
+    );
+
+    client.close();
+  }
+
   Future<List<String>> domainList() async {
     var url = '$rootAddress/zones?per_page=50';
     var client = await getClient();

lib/logic/api_maps/hetzner.dart

@@ -115,7 +115,8 @@ class HetznerApi extends ApiMap {
     final apiToken = StringGenerators.apiToken();
 
     // Replace all non-alphanumeric characters with an underscore
-    var hostname = domainName.split('.')[0].replaceAll(RegExp(r'[^a-zA-Z0-9]'), '-');
+    var hostname =
+        domainName.split('.')[0].replaceAll(RegExp(r'[^a-zA-Z0-9]'), '-');
     // if hostname ends with -, remove it
     if (hostname.endsWith('-')) {
       hostname = hostname.substring(0, hostname.length - 1);

lib/logic/api_maps/server.dart

@@ -1,5 +1,6 @@
 import 'dart:async';
 import 'dart:io';
+import 'dart:convert';
 
 import 'package:dio/dio.dart';
 import 'package:selfprivacy/config/get_it_config.dart';
@@ -236,6 +237,21 @@ class ServerApi extends ApiMap {
     client.close();
     return response.statusCode == HttpStatus.ok;
   }
+
+  Future<String> getDkim() async {
+    var client = await getClient();
+    Response response = await client.get('/services/mailserver/dkim');
+    client.close();
+
+    // if got 404 raise exception
+    if (response.statusCode == HttpStatus.notFound) {
+      throw Exception('No DKIM key found');
+    }
+
+    final base64toString = utf8.fuse(base64);
+
+    return base64toString.decode(response.data).split('(')[1].split(')')[0];
+  }
 }
 
 extension UrlServerExt on ServiceTypes {

lib/logic/cubit/app_config/app_config_cubit.dart

@@ -239,6 +239,7 @@ class AppConfigCubit extends Cubit<AppConfigState> {
       var isServerWorking = await repository.isHttpServerWorking();
 
       if (isServerWorking) {
+        await repository.createDkimRecord(state.cloudFlareDomain!);
         await repository.saveHasFinalChecked(true);
 
         emit(state.finish());

lib/logic/cubit/app_config/app_config_repository.dart

@@ -189,9 +189,23 @@ class AppConfigRepository {
     );
   }
 
+  Future<void> createDkimRecord(CloudFlareDomain cloudFlareDomain) async {
+    var cloudflareApi = CloudflareApi();
+    var api = ServerApi();
+
+    var dkimRecordString = await api.getDkim();
+
+    await cloudflareApi.setDkim(dkimRecordString, cloudFlareDomain);
+  }
+
   Future<bool> isHttpServerWorking() async {
     var api = ServerApi();
     var isHttpServerWorking = await api.isHttpServerWorking();
+    try {
+      await api.getDkim();
+    } catch (e) {
+      return false;
+    }
     return isHttpServerWorking;
   }
 

lib/logic/cubit/backups/backups_cubit.dart

@@ -85,8 +85,8 @@ class BackupsCubit extends AppConfigDependendCubit<BackupsState> {
 
   Future<void> createBucket() async {
     emit(state.copyWith(preventActions: true));
-    final domain =
-        appConfigCubit.state.cloudFlareDomain!.domainName.replaceAll(RegExp(r'[^a-zA-Z0-9]'), '-');
+    final domain = appConfigCubit.state.cloudFlareDomain!.domainName
+        .replaceAll(RegExp(r'[^a-zA-Z0-9]'), '-');
     final serverId = appConfigCubit.state.hetznerServer!.id;
     var bucketName = 'selfprivacy-$domain-$serverId';
     // If bucket name is too long, shorten it