Null safety fixes

lib/models/bucket.dart

@@ -14,7 +14,7 @@ class Bucket {
   final List<Task> tasks;
 
   Bucket({
-    this.id = -1,
+    this.id = 0,
     required this.listId,
     required this.title,
     this.position,
@@ -47,7 +47,7 @@ class Bucket {
                 .toList();
 
   toJSON() => {
-    'id': id != -1 ? id : null,
+    'id': id,
     'list_id': listId,
     'title': title,
     'position': position,

lib/models/label.dart

@@ -13,7 +13,7 @@ class Label {
   late final Color textColor = color != null && color!.computeLuminance() <= 0.5 ? vLabelLight : vLabelDark;
 
   Label({
-    this.id = -1,
+    this.id = 0,
     required this.title,
     this.description = '',
     this.color,
@@ -35,7 +35,7 @@ class Label {
         createdBy = User.fromJson(json['created_by']);
 
   toJSON() => {
-        'id': id != -1 ? id : null,
+        'id': id,
         'title': title,
         'description': description,
         'hex_color':

lib/models/list.dart

@@ -11,7 +11,7 @@ class TaskList {
   final bool isFavorite;
 
   TaskList({
-    this.id = -1,
+    this.id = 0,
     required this.title,
     required this.namespaceId,
     this.description = '',
@@ -39,7 +39,7 @@ class TaskList {
 
   toJSON() {
     return {
-      'id': id != -1 ? id : null,
+      'id': id,
       'title': title,
       'description': description,
       'owner': owner.toJSON(),

lib/models/namespace.dart

@@ -7,7 +7,7 @@ class Namespace {
   final User owner;
 
   Namespace({
-    this.id = -1,
+    this.id = 0,
     DateTime? created,
     DateTime? updated,
     required this.title,
@@ -25,7 +25,7 @@ class Namespace {
         owner = User.fromJson(json['owner']);
 
   Map<String, dynamic> toJSON() => {
-        'id': id != -1 ? id : null,
+        'id': id,
         'created': created.toUtc().toIso8601String(),
         'updated': updated.toUtc().toIso8601String(),
         'title': title,

lib/models/task.dart

@@ -12,27 +12,25 @@ class Task {
   final int? parentTaskId, priority, bucketId;
   final int listId;
   final DateTime created, updated;
-  final DateTime? dueDate, startDate, endDate;
+  DateTime? dueDate, startDate, endDate;
   final List<DateTime> reminderDates;
   final String identifier;
   final String title, description;
   final bool done;
-  final Color? color;
+  Color? color;
   final double? kanbanPosition;
   final User createdBy;
-  final Duration? repeatAfter;
+  Duration? repeatAfter;
   final List<Task> subtasks;
   final List<Label> labels;
   final List<TaskAttachment> attachments;
   // TODO: add position(?)
 
   late final checkboxStatistics = getCheckboxStatistics(description);
   late final hasCheckboxes = checkboxStatistics.total != 0;
-  late final textColor = (color != null && color!.computeLuminance() > 0.5) ? Colors.black : Colors.white;
-  late final hasDueDate = dueDate?.year != 1;
 
   Task({
-    this.id = -1,
+    this.id = 0,
     this.identifier = '',
     this.title = '',
     this.description = '',
@@ -59,6 +57,14 @@ class Task {
 
   bool loading = false;
 
+  Color get textColor {
+    if (color != null && color!.computeLuminance() > 0.5) {
+      return Colors.black;
+    }
+    return Colors.white;
+  }
+  bool get hasDueDate => dueDate?.year != 1;
+
   Task.fromJson(Map<String, dynamic> json)
       : id = json['id'],
         title = json['title'],
@@ -104,7 +110,7 @@ class Task {
         createdBy = User.fromJson(json['created_by']);
 
   toJSON() => {
-        'id': id != -1 ? id : null,
+        'id': id,
         'title': title,
         'description': description,
         'identifier': identifier.isNotEmpty ? identifier : null,
@@ -146,7 +152,6 @@ class Task {
     String? identifier,
     bool? done,
     Color? color,
-    bool? resetColor,
     double? kanbanPosition,
     User? createdBy,
     Duration? repeatAfter,
@@ -170,7 +175,7 @@ class Task {
       description: description ?? this.description,
       identifier: identifier ?? this.identifier,
       done: done ?? this.done,
-      color: (resetColor ?? false) ? null : (color ?? this.color),
+      color: color ?? this.color,
       kanbanPosition: kanbanPosition ?? this.kanbanPosition,
       createdBy: createdBy ?? this.createdBy,
       repeatAfter: repeatAfter ?? this.repeatAfter,

lib/models/taskAttachment.dart

@@ -10,7 +10,7 @@ class TaskAttachment {
   // TODO: add file
 
   TaskAttachment({
-    this.id = -1,
+    this.id = 0,
     required this.taskId,
     DateTime? created,
     required this.createdBy,
@@ -23,7 +23,7 @@ class TaskAttachment {
         createdBy = User.fromJson(json['created_by']);
 
   toJSON() => {
-    'id': id != -1 ? id : null,
+    'id': id,
     'task_id': taskId,
     'created': created.toUtc().toIso8601String(),
     'created_by': createdBy.toJSON(),

lib/models/user.dart

@@ -7,7 +7,7 @@ class User {
   final DateTime created, updated;
 
   User({
-    this.id = -1,
+    this.id = 0,
     this.name = '',
     required this.username,
     DateTime? created,
@@ -23,7 +23,7 @@ class User {
         updated = DateTime.parse(json['updated']);
 
   toJSON() => {
-        'id': id != -1 ? id : null,
+        'id': id,
         'name': name,
         'username': username,
         'created': created.toUtc().toIso8601String(),

lib/pages/list/task_edit.dart

@@ -365,19 +365,18 @@ class _TaskEditPageState extends State<TaskEditPage> {
     // Removes all reminders with no value set.
     _reminderDates.removeWhere((d) => d == DateTime(0));
 
-    Task updatedTask = widget.task.copyWith(
+    final updatedTask = widget.task.copyWith(
       title: _title,
       description: _description,
       reminderDates: _reminderDates,
-      dueDate: _dueDate,
-      startDate: _startDate,
-      endDate: _endDate,
       priority: _priority,
-      repeatAfter: _repeatAfter,
       labels: _labels,
-      color: _resetColor ? null : (_color ?? widget.task.color),
-      resetColor: _resetColor,
-    );
+    )
+      ..dueDate = _dueDate
+      ..startDate = _startDate
+      ..endDate = _endDate
+      ..color = _resetColor ? null : (_color ?? widget.task.color)
+      ..repeatAfter = _repeatAfter;
 
     // update the labels
     await VikunjaGlobal.of(context)

lib/utils/repeat_after_parse.dart

@@ -1,4 +1,4 @@
-getRepeatAfterTypeFromDuration(Duration? repeatAfter) {
+String? getRepeatAfterTypeFromDuration(Duration? repeatAfter) {
   if (repeatAfter == null || repeatAfter.inSeconds == 0) {
     return null;
   }
@@ -18,7 +18,7 @@ getRepeatAfterTypeFromDuration(Duration? repeatAfter) {
   return 'Hours';
 }
 
-getRepeatAfterValueFromDuration(Duration? repeatAfter) {
+int? getRepeatAfterValueFromDuration(Duration? repeatAfter) {
   if (repeatAfter == null || repeatAfter.inSeconds == 0) {
     return null;
   }
@@ -43,13 +43,16 @@ getRepeatAfterValueFromDuration(Duration? repeatAfter) {
   return repeatAfter.inHours;
 }
 
-getDurationFromType(String? value, String? type) {
+Duration? getDurationFromType(String? value, String? type) {
   // Return an empty duration if either of the values is not set
   if (value == null || value == '' || type == null || type == '') {
     return Duration();
   }
 
-  int val = int.parse(value);
+  int? val = int.tryParse(value);
+  if (val == null) {
+    return null;
+  }
 
   switch (type) {
     case 'Hours':
@@ -63,4 +66,6 @@ getDurationFromType(String? value, String? type) {
     case 'Years':
       return Duration(days: val * 365);
   }
+
+  return null;
 }

pubspec.lock

@@ -42,7 +42,7 @@ packages:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.8.2"
+    version: "2.9.0"
   boolean_selector:
     dependency: transitive
     description:
@@ -70,14 +70,7 @@ packages:
       name: characters
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
-  charcode:
-    dependency: transitive
-    description:
-      name: charcode
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.3.1"
+    version: "1.2.1"
   checked_yaml:
     dependency: transitive
     description:
@@ -98,7 +91,7 @@ packages:
       name: clock
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0"
+    version: "1.1.1"
   collection:
     dependency: transitive
     description:
@@ -168,7 +161,7 @@ packages:
       name: fake_async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0"
+    version: "1.3.1"
   ffi:
     dependency: transitive
     description:
@@ -400,21 +393,21 @@ packages:
       name: matcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.11"
+    version: "0.12.12"
   material_color_utilities:
     dependency: transitive
     description:
       name: material_color_utilities
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.4"
+    version: "0.1.5"
   meta:
     dependency: transitive
     description:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.7.0"
+    version: "1.8.0"
   mime:
     dependency: transitive
     description:
@@ -449,7 +442,7 @@ packages:
       name: path
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.1"
+    version: "1.8.2"
   path_drawing:
     dependency: transitive
     description:
@@ -594,7 +587,7 @@ packages:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.2"
+    version: "1.9.0"
   stack_trace:
     dependency: transitive
     description:
@@ -615,35 +608,35 @@ packages:
       name: string_scanner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0"
+    version: "1.1.1"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
+    version: "1.2.1"
   test:
     dependency: "direct dev"
     description:
       name: test
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.21.1"
+    version: "1.21.4"
   test_api:
     dependency: transitive
     description:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.4.9"
+    version: "0.4.12"
   test_core:
     dependency: transitive
     description:
       name: test_core
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.4.13"
+    version: "0.4.16"
   timezone:
     dependency: transitive
     description: