Fixed Remaining Problems

lib/models/app_exceptions.dart

@@ -1,5 +1,5 @@
 class TimeProgressInvalidNameException implements Exception {
-  final invalidName;
+  final String invalidName;
 
   TimeProgressInvalidNameException(this.invalidName);
 
@@ -7,8 +7,8 @@ class TimeProgressInvalidNameException implements Exception {
 }
 
 class TimeProgressStartTimeIsNotBeforeEndTimeException implements Exception {
-  final startTime;
-  final endTime;
+  final DateTime startTime;
+  final DateTime endTime;
 
   TimeProgressStartTimeIsNotBeforeEndTimeException(
       this.startTime, this.endTime);

lib/models/app_settings.dart

@@ -8,9 +8,9 @@ class AppSettings {
   final Duration duration;
 
   const AppSettings({
-    this.doneColor,
-    this.leftColor,
-    this.duration,
+    required this.doneColor,
+    required this.leftColor,
+    required this.duration,
   });
 
   factory AppSettings.defaults() => const AppSettings(
@@ -20,9 +20,9 @@ class AppSettings {
       );
 
   AppSettings copyWith({
-    Color doneColor,
-    Color leftColor,
-    Duration duration,
+    Color? doneColor,
+    Color? leftColor,
+    Duration? duration,
   }) =>
       AppSettings(
         doneColor: doneColor ?? this.doneColor,

lib/models/app_state.dart

@@ -12,18 +12,20 @@ class AppState {
       {this.hasProgressesLoaded = false,
       this.hasSettingsLoaded = false,
       this.timeProgressList = const [],
-      this.appSettings});
+      required this.appSettings});
 
   factory AppState.initial() =>
       AppState(hasProgressesLoaded: false, appSettings: AppSettings.defaults());
 
   AppState copyWith({
-    bool hasLoaded,
-    List<TimeProgress> timeProgressList,
+    bool? hasLoaded,
+    List<TimeProgress>? timeProgressList,
+    AppSettings? appSettings,
   }) {
     return AppState(
       hasProgressesLoaded: hasLoaded ?? hasProgressesLoaded,
       timeProgressList: timeProgressList ?? this.timeProgressList,
+      appSettings: appSettings ?? this.appSettings,
     );
   }
 

lib/models/time_progress.dart

@@ -10,7 +10,7 @@ class TimeProgress {
   final DateTime startTime;
   final DateTime endTime;
 
-  TimeProgress(this.name, this.startTime, this.endTime, {String id})
+  TimeProgress(this.name, this.startTime, this.endTime, {String? id})
       : id = id ?? Uuid().generateV4();
 
   factory TimeProgress.initialDefault() {
@@ -23,7 +23,7 @@ class TimeProgress {
       TimeProgress("", DateTime.now(), DateTime.now().add(duration));
 
   TimeProgress copyWith(
-          {String id, String name, DateTime startTime, DateTime endTime}) =>
+          {String? id, String? name, DateTime? startTime, DateTime? endTime}) =>
       TimeProgress(
         name ?? this.name,
         startTime ?? this.startTime,
@@ -83,21 +83,22 @@ class TimeProgress {
       throw TimeProgressInvalidNameException(name);
     }
     if (!TimeProgress.areTimesValid(startTime, endTime)) {
-      throw TimeProgressStartTimeIsNotBeforeEndTimeException(startTime, endTime);
+      throw TimeProgressStartTimeIsNotBeforeEndTimeException(
+          startTime, endTime);
     }
     return TimeProgressEntity(id, name, startTime, endTime);
   }
 
   static TimeProgress fromEntity(TimeProgressEntity entity) =>
       TimeProgress(entity.name, entity.startTime, entity.endTime,
-          id: entity.id ?? Uuid().generateV4());
+          id: entity.id);
 
   static bool isValid(TimeProgress tp) =>
       TimeProgress.isNameValid(tp.name) &&
       TimeProgress.areTimesValid(tp.startTime, tp.endTime);
 
   static bool isNameValid(String name) =>
-      name != null && name != "" && name.length > 2 && name.length < 21;
+      name != "" && name.length > 2 && name.length < 21;
 
   static bool areTimesValid(DateTime startTime, DateTime endTime) =>
       startTime.isBefore(endTime);