WT 1.1.11+3 Evaluation, null-safe fixes

lib/util/common.dart

@@ -98,17 +98,22 @@ mixin Common {
     return datePart;
   }
 
-  static String? emailValidation(String email) {
+  static String? emailValidation(String? email) {
+    final String error = "Please type an email address";
+    if (email == null) {
+      return error;
+    }
     bool emailValid = RegExp(r"^[a-zA-Z0-9.a-zA-Z0-9.!#$%&'*+-/=?^_`{|}~]+@[a-zA-Z0-9]+\.[a-zA-Z]+").hasMatch(email);
-    return emailValid ? null : "Please type an email address";
+    return emailValid ? null : error;
   }
 
   static String? passwordValidation(String? value) {
+    final String error = "Password too short";
     if (value == null || value.length == 0) {
-      return null;
+      return error;
     }
     bool valid = 8 < value.length;
-    return valid ? null : "Password too short";
+    return valid ? null : error;
   }
 
   static Widget badgedIcon(Color color, IconData icon, String badgeKey) {

lib/util/enums.dart

@@ -73,3 +73,11 @@ extension SizesExt on SizesEnum {
   bool equalsTo(SizesEnum event) => this.toString() == event.toString();
   bool equalsStringTo(String event) => this.toString() == event;
 }
+
+enum EvaluationText { very_poor, poor, fair, below_average, average, above_average, good, excellent, elite }
+
+extension EvaluationTextExt on EvaluationText {
+  String toStr() => this.toString().split(".").last;
+  bool equalsTo(EvaluationText eval) => this.toString() == eval.toString();
+  bool equalsStringTo(String eval) => this.toStr() == eval;
+}

lib/util/track.dart

@@ -3,8 +3,8 @@ import 'package:aitrainer_app/model/cache.dart';
 import 'package:aitrainer_app/service/logging.dart';
 import 'package:aitrainer_app/service/tracking_service.dart';
 import 'package:aitrainer_app/util/enums.dart';
-import 'package:aitrainer_app/library/flurry.dart';
 import 'package:aitrainer_app/model/tracking.dart' as model;
+import 'package:flurry/flurry.dart';
 import 'package:smartlook/smartlook.dart';
 
 class Track with Logging {

lib/util/trans.dart

@@ -8,6 +8,9 @@ mixin Trans {
   }
 
   String t(String text) {
+    if (context == null) {
+      throw Exception("Translation: initialize the context");
+    }
     return AppLocalizations.of(context)!.translate(text);
   }
 }