feat(location): Make flag getter a part of server provider location object

lib/logic/models/json/digital_ocean_server_info.dart

@@ -36,6 +36,43 @@ class DigitalOceanLocation {
 
   static DigitalOceanLocation fromJson(final Map<String, dynamic> json) =>
       _$DigitalOceanLocationFromJson(json);
+
+  String get flag {
+    String emoji = '';
+
+    switch (slug.substring(0, 3)) {
+      case 'fra':
+        emoji = '🇩🇪';
+        break;
+
+      case 'ams':
+        emoji = '🇳🇱';
+        break;
+
+      case 'sgp':
+        emoji = '🇸🇬';
+        break;
+
+      case 'lon':
+        emoji = '🇬🇧';
+        break;
+
+      case 'tor':
+        emoji = '🇨🇦';
+        break;
+
+      case 'blr':
+        emoji = '🇮🇳';
+        break;
+
+      case 'nyc':
+      case 'sfo':
+        emoji = '🇺🇸';
+        break;
+    }
+
+    return emoji;
+  }
 }
 
 @JsonSerializable()

lib/logic/models/json/hetzner_server_info.dart

@@ -135,6 +135,24 @@ class HetznerLocation {
 
   static HetznerLocation fromJson(final Map<String, dynamic> json) =>
       _$HetznerLocationFromJson(json);
+
+  String get flag {
+    String emoji = '';
+    switch (country.substring(0, 2)) {
+      case 'DE':
+        emoji = '🇩🇪';
+        break;
+
+      case 'FI':
+        emoji = '🇫🇮';
+        break;
+
+      case 'US':
+        emoji = '🇺🇸';
+        break;
+    }
+    return emoji;
+  }
 }
 
 /// A Volume is a highly-available, scalable, and SSD-based block storage for Servers.

lib/logic/models/server_provider_location.dart

@@ -3,13 +3,11 @@ class ServerProviderLocation {
     required this.title,
     required this.identifier,
     this.description,
-    this.flag,
+    this.flag = '',
   });
 
   final String title;
   final String identifier;
   final String? description;
-
-  /// as emoji
-  final String? flag;
+  final String flag;
 }

lib/logic/providers/server_providers/digital_ocean.dart

@@ -293,43 +293,6 @@ class DigitalOceanServerProvider extends ServerProvider {
     return success;
   }
 
-  String? getEmojiFlag(final String query) {
-    String? emoji;
-
-    switch (query.toLowerCase().substring(0, 3)) {
-      case 'fra':
-        emoji = '🇩🇪';
-        break;
-
-      case 'ams':
-        emoji = '🇳🇱';
-        break;
-
-      case 'sgp':
-        emoji = '🇸🇬';
-        break;
-
-      case 'lon':
-        emoji = '🇬🇧';
-        break;
-
-      case 'tor':
-        emoji = '🇨🇦';
-        break;
-
-      case 'blr':
-        emoji = '🇮🇳';
-        break;
-
-      case 'nyc':
-      case 'sfo':
-        emoji = '🇺🇸';
-        break;
-    }
-
-    return emoji;
-  }
-
   @override
   Future<GenericResult<List<ServerProviderLocation>>>
       getAvailableLocations() async {
@@ -351,7 +314,7 @@ class DigitalOceanServerProvider extends ServerProvider {
         location = ServerProviderLocation(
           title: rawLocation.slug,
           description: rawLocation.name,
-          flag: getEmojiFlag(rawLocation.slug),
+          flag: rawLocation.flag,
           identifier: rawLocation.slug,
         );
       } catch (e) {
@@ -662,8 +625,7 @@ class DigitalOceanServerProvider extends ServerProvider {
         ServerMetadataEntity(
           type: MetadataType.location,
           trId: 'server.location',
-          value:
-              '${droplet['region']['name']} ${getEmojiFlag(droplet['region']['slug'].toString()) ?? ''}',
+          value: '${droplet['region']['name']}',
         ),
         ServerMetadataEntity(
           type: MetadataType.other,

lib/logic/providers/server_providers/hetzner.dart

@@ -335,26 +335,6 @@ class HetznerServerProvider extends ServerProvider {
     return result;
   }
 
-  String? getEmojiFlag(final String query) {
-    String? emoji;
-
-    switch (query.toLowerCase()) {
-      case 'de':
-        emoji = '🇩🇪';
-        break;
-
-      case 'fi':
-        emoji = '🇫🇮';
-        break;
-
-      case 'us':
-        emoji = '🇺🇸';
-        break;
-    }
-
-    return emoji;
-  }
-
   @override
   Future<GenericResult<bool>> trySetServerLocation(
     final String location,
@@ -396,7 +376,7 @@ class HetznerServerProvider extends ServerProvider {
         location = ServerProviderLocation(
           title: rawLocation.city,
           description: rawLocation.description,
-          flag: getEmojiFlag(rawLocation.country),
+          flag: rawLocation.flag,
           identifier: rawLocation.name,
         );
       } catch (e) {

lib/ui/pages/setup/initializing/server_type_picker.dart

@@ -107,7 +107,7 @@ class SelectLocationPage extends StatelessWidget {
                                   crossAxisAlignment: CrossAxisAlignment.start,
                                   children: [
                                     Text(
-                                      '${location.flag ?? ''} ${location.title}',
+                                      '${location.flag} ${location.title}',
                                       style: Theme.of(context)
                                           .textTheme
                                           .titleMedium,