feat: simplified digital ocean town name to country mapper.

lib/logic/models/json/digital_ocean_server_info.dart

@@ -77,46 +77,21 @@ class DigitalOceanLocation {
     return emoji;
   }
 
+  static const _townPrefixToCountryMap = {
+    'fra': 'germany',
+    'ams': 'netherlands',
+    'sgp': 'singapore',
+    'lon': 'united_kingdom',
+    'tor': 'canada',
+    'blr': 'india',
+    'syd': 'australia',
+    'nyc': 'united_states',
+    'sfo': 'united_states',
+  };
+
   String get countryDisplayKey {
-    String displayKey = 'countries.';
-    switch (slug.substring(0, 3)) {
-      case 'fra':
-        displayKey += 'germany';
-        break;
-
-      case 'ams':
-        displayKey += 'netherlands';
-        break;
-
-      case 'sgp':
-        displayKey += 'singapore';
-        break;
-
-      case 'lon':
-        displayKey += 'united_kingdom';
-        break;
-
-      case 'tor':
-        displayKey += 'canada';
-        break;
-
-      case 'blr':
-        displayKey += 'india';
-        break;
-
-      case 'syd':
-        displayKey += 'australia';
-        break;
-
-      case 'nyc':
-      case 'sfo':
-        displayKey += 'united_states';
-        break;
-
-      default:
-        displayKey = slug;
-    }
-    return displayKey;
+    final countryName = _townPrefixToCountryMap[slug.substring(0, 3)] ?? slug;
+    return 'countries.$countryName';
   }
 }