Refactored methods to private

lib/services/local_storage_service.dart

@@ -21,7 +21,7 @@ class LocalStorageService {
   static const String _fileName = 'game_data.json';
 
   /// Writes the game session list to a JSON file and returns it as string.
-  static String getGameDataAsJsonFile() {
+  static String _getGameDataAsJsonFile() {
     final jsonFile =
         gameManager.gameList.map((session) => session.toJson()).toList();
     return json.encode(jsonFile);
@@ -39,7 +39,7 @@ class LocalStorageService {
     print('[local_storage_service.dart] Versuche, Daten zu speichern...');
     try {
       final file = await _getFilePath();
-      final jsonFile = getGameDataAsJsonFile();
+      final jsonFile = _getGameDataAsJsonFile();
       await file.writeAsString(jsonFile);
       print(
           '[local_storage_service.dart] Die Spieldaten wurden zwischengespeichert.');
@@ -70,7 +70,7 @@ class LocalStorageService {
         return false;
       }
 
-      if (!await validateJsonSchema(jsonString, true)) {
+      if (!await _validateJsonSchema(jsonString, true)) {
         print(
             '[local_storage_service.dart] Die Datei konnte nicht validiert werden');
         gameManager.gameList = [];
@@ -105,7 +105,7 @@ class LocalStorageService {
   /// Opens the file picker to export game data as a JSON file.
   /// This method will export the given [jsonString] as a JSON file. It opens
   /// the file picker with the choosen [fileName].
-  static Future<bool> exportJsonData(
+  static Future<bool> _exportJsonData(
     String jsonString,
     String fileName,
   ) async {
@@ -133,16 +133,16 @@ class LocalStorageService {
 
   /// Opens the file picker to export all game sessions as a JSON file.
   static Future<bool> exportGameData() async {
-    String jsonString = getGameDataAsJsonFile();
+    String jsonString = _getGameDataAsJsonFile();
     String fileName = 'cabo_counter-game_data';
-    return exportJsonData(jsonString, fileName);
+    return _exportJsonData(jsonString, fileName);
   }
 
   /// Opens the file picker to save a single game session as a JSON file.
   static Future<bool> exportSingleGameSession(GameSession session) async {
     String jsonString = json.encode(session.toJson());
     String fileName = 'cabo_counter-game_${session.id.substring(0, 7)}';
-    return exportJsonData(jsonString, fileName);
+    return _exportJsonData(jsonString, fileName);
   }
 
   /// Opens the file picker to import a JSON file and loads the game data from it.
@@ -162,7 +162,7 @@ class LocalStorageService {
     try {
       final jsonString = await _readFileContent(path.files.single);
 
-      if (await validateJsonSchema(jsonString, true)) {
+      if (await _validateJsonSchema(jsonString, true)) {
         // Checks if the JSON String is in the gameList format
 
         final jsonData = json.decode(jsonString) as List<dynamic>;
@@ -172,12 +172,12 @@ class LocalStorageService {
             .toList();
 
         for (GameSession s in importedList) {
-          importSession(s);
+          _importSession(s);
         }
-      } else if (await validateJsonSchema(jsonString, false)) {
+      } else if (await _validateJsonSchema(jsonString, false)) {
         // Checks if the JSON String is in the single game format
         final jsonData = json.decode(jsonString) as Map<String, dynamic>;
-        importSession(GameSession.fromJson(jsonData));
+        _importSession(GameSession.fromJson(jsonData));
       } else {
         return ImportStatus.validationError;
       }
@@ -198,7 +198,7 @@ class LocalStorageService {
   }
 
   /// Imports a single game session into the gameList.
-  static Future<void> importSession(GameSession session) async {
+  static Future<void> _importSession(GameSession session) async {
     if (gameManager.gameExistsInGameList(session.id)) {
       print(
           '[local_storage_service.dart] Die Session mit der ID ${session.id} existiert bereits. Sie wird überschrieben.');
@@ -221,7 +221,7 @@ class LocalStorageService {
   /// This method checks if the provided [jsonString] is valid against the
   /// JSON schema. It takes a boolean [isGameList] to determine
   /// which schema to use (game list or single game).
-  static Future<bool> validateJsonSchema(
+  static Future<bool> _validateJsonSchema(
       String jsonString, bool isGameList) async {
     final String schemaString;