update

QuestionRepository:
+ refactor funzioni;
+ update data, file con cache;
+ isValid() & parse();

ViewMenu:
+ controllo nuove domande;

ViewSettings:
+ ripristino impostazione singola con doppio tap;
+ controllo nuove domande;
+ caricamento file domande personalizzato;

app-mobile/flutter_application/lib/model/PlatformType.dart

@@ -0,0 +1,18 @@
+import 'dart:io';
+
+enum PlatformType { UNKNOWN, MOBILE, DESKTOP, WEB }
+
+PlatformType getPlatformType() {
+  try {
+    if (Platform.isAndroid || Platform.isIOS) {
+      return PlatformType.MOBILE;
+    } else if (Platform.isWindows || Platform.isLinux || Platform.isMacOS) {
+      return PlatformType.DESKTOP;
+    }
+  } catch (e) {
+    if (e.toString().contains("Unsupported operation")) {
+      return PlatformType.WEB;
+    }
+  }
+  return PlatformType.UNKNOWN;
+}

app-mobile/flutter_application/lib/model/Utils.dart

@@ -0,0 +1,11 @@
+import 'package:roquiz/persistence/QuestionRepository.dart';
+
+class Utils {
+  static String getParsedDateTime(DateTime date) {
+    if (date == QuestionRepository.CUSTOM_DATE) {
+      return "personalizzato";
+    } else {
+      return "${date.day < 10 ? "0" : ""}${date.day}/${date.month < 10 ? "0" : ""}${date.month}/${date.year}, ${date.hour < 10 ? "0" : ""}${date.hour}:${date.minute < 10 ? "0" : ""}${date.minute}";
+    }
+  }
+}