Merge pull request 'Location overview screen and model changes' (#3) from development into main

Reviewed-on: #3

.gitea/workflows/android_build.yaml

@@ -0,0 +1,68 @@
+name: Flutter APK Build
+
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
+
+permissions:
+  contents: write
+  actions:  read
+
+jobs:
+  build_apk:
+    name: Build Flutter APK
+    runs-on: ubuntu-latest
+    
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Setup Java (Temurin 17)
+        uses: actions/setup-java@v3
+        with:
+          distribution: temurin
+          java-version: '17'
+
+      - name: Setup Android SDK
+        uses: android-actions/setup-android@v3
+        with:
+          packages: "platform-tools platforms;android-36 build-tools;36.0.0"
+      
+      - name: Setup Flutter
+        uses: subosito/flutter-action@v2
+        with:
+          channel: stable
+      - run: flutter --version
+      - run: flutter doctor
+      
+      - name: Get dependencies
+        run: flutter pub get
+      
+      - name: Build APK
+        run: flutter build apk --release
+      
+      - name: Upload APK artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: flutter-apk
+          path: build/app/outputs/flutter-apk/app-release.apk
+          retention-days: 30
+          
+      - name: Create Gitea release
+        uses: akkuman/gitea-release-action@v1
+        env:
+          GITEA_TOKEN: ${{ secrets.RUNNER_CREATE_RELEASE  }}
+        with:
+          tag_name: "v0.1.${{ github.run_number }}"
+          name: "Flutter Android v0.1.${{ github.run_number }}"
+          body: "Automated build from CI"
+          draft: false
+          prerelease: false
+          files: |
+            build/app/outputs/flutter-apk/app-release.apk
+          gitea_url: "https://git.skup.in"
+          owner: "marco"
+          repo: "tasks"

.gitignore

@@ -43,3 +43,4 @@ app.*.map.json
 /android/app/debug
 /android/app/profile
 /android/app/release
+devtools_options.yaml

LICENSE

@@ -0,0 +1,675 @@
+                    GNU GENERAL PUBLIC LICENSE
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+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+  13. Use with the GNU Affero General Public License.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
+combined work, and to convey the resulting work.  The terms of this
+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.
+

lib/app_theme.dart

@@ -0,0 +1,39 @@
+import 'package:flutter/material.dart';
+
+class AppTheme {
+  AppTheme._();
+
+  static const double formColumnSpacing = 12.0;
+
+  static ThemeData get lightTheme => _baseTheme(
+    colorScheme: ColorScheme.fromSeed(
+      seedColor: Colors.indigo,
+      brightness: Brightness.light,
+    ),
+  );
+
+  static ThemeData get darkTheme => _baseTheme(
+    colorScheme: ColorScheme.fromSeed(
+      seedColor: Colors.indigo,
+      brightness: Brightness.dark,
+    ),
+  );
+
+  static ThemeData _baseTheme({required ColorScheme colorScheme}) {
+    final theme = ThemeData(useMaterial3: true, colorScheme: colorScheme);
+    final universalBorderRadius = BorderRadius.circular(12);
+
+    return theme.copyWith(
+      inputDecorationTheme: InputDecorationTheme(
+        border: OutlineInputBorder(borderRadius: universalBorderRadius),
+      ),
+
+      listTileTheme: ListTileThemeData(
+        shape: RoundedRectangleBorder(
+          borderRadius: universalBorderRadius,
+          side: BorderSide(color: colorScheme.secondaryContainer, width: 2),
+        ),
+      ),
+    );
+  }
+}

lib/example_data.dart

@@ -1,9 +0,0 @@
-import 'model/task.dart';
-import 'service/tools.dart' show generateId;
-
-List<Task> tasks = [
-  Task(id: generateId(), title: 'Hund föhnen', position: 0),
-  Task(id: '${generateId()}1', title: 'Fuchs streicheln', position: 1),
-  Task(id: '${generateId()}2', title: 'Katze füttern', position: 2),
-  Task(id: '${generateId()}3', title: 'Bär kraulen', position: 3),
-];

lib/main.dart

@@ -1,10 +1,32 @@
 import 'package:flutter/material.dart';
 
+import 'app_theme.dart';
+import 'model/repositories/local_repository.dart';
+import 'pages/locations_overview_page.dart';
 import 'pages/task_edit_page.dart';
 import 'pages/task_overview_page.dart';
+import 'service/controller_scope.dart';
+import 'service/controllers/alarm_controller.dart';
+import 'service/controllers/location_controller.dart';
+import 'service/controllers/task_controller.dart';
 
-void main() {
+void main() async {
-  runApp(const MainApp());
+  final repository = LocalRepository();
+  WidgetsFlutterBinding.ensureInitialized();
+  await repository.initialize();
+
+  runApp(
+    ControllerScope(
+      controller: LocationController(repository),
+      child: ControllerScope(
+        controller: AlarmController(repository),
+        child: ControllerScope(
+          controller: TaskController(repository),
+          child: const MainApp(),
+        ),
+      ),
+    ),
+  );
 }
 
 class MainApp extends StatelessWidget {
@@ -13,9 +35,12 @@ class MainApp extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
+      theme: AppTheme.lightTheme,
+      darkTheme: AppTheme.darkTheme,
       routes: {
         TaskOverviewPage.routeName: (context) => TaskOverviewPage(),
         TaskEditPage.routeName: (context) => TaskEditPage(),
+        LocationsOverviewPage.routeName: (context) => LocationsOverviewPage(),
       },
       initialRoute: TaskOverviewPage.routeName,
     );

lib/model/alarm.dart

@@ -0,0 +1,30 @@
+import 'location_alarm.dart';
+import 'time_alarm.dart';
+
+abstract class Alarm {
+  String get id;
+  String get taskId;
+  Map<String, dynamic> toJson();
+
+  factory Alarm.fromJson(Map<String, dynamic> json) {
+    if (json.containsKey('triggerAt')) {
+      return TimeAlarm.fromJson(json);
+    }
+
+    if (json.containsKey('location')) {
+      return LocationAlarm.fromJson(json);
+    }
+
+    throw ArgumentError('Unknown alarm type');
+  }
+
+  @override
+  bool operator ==(Object other) {
+    if (other is! Alarm) return false;
+
+    return hashCode == other.hashCode;
+  }
+
+  @override
+  int get hashCode => taskId.hashCode;
+}

lib/model/callback_models/create_task_request.dart

@@ -1,4 +1,3 @@
-import '../location.dart';
 import '../task.dart';
 
 class CreateTaskRequest {
@@ -9,8 +8,6 @@ class CreateTaskRequest {
   final bool isCompleted;
   final String category;
   final List<Task> subtasks;
-  final List<DateTime> alarms;
-  final Location? location;
   final String url;
 
   CreateTaskRequest({
@@ -21,8 +18,6 @@ class CreateTaskRequest {
     required this.isCompleted,
     required this.category,
     required this.subtasks,
-    required this.alarms,
-    required this.location,
     required this.url,
   });
 
@@ -34,11 +29,9 @@ class CreateTaskRequest {
       isCompleted = task.isCompleted,
       category = task.category,
       subtasks = task.subtasks,
-      alarms = task.alarms,
-      location = task.location,
       url = task.url;
 
-  Task toTask({required String id, required int position}) {
+  Task toTask({required String id}) {
     return Task(
       id: id,
       title: title,
@@ -48,10 +41,7 @@ class CreateTaskRequest {
       isCompleted: isCompleted,
       category: category,
       subtasks: subtasks,
-      alarms: alarms,
-      location: location,
       url: url,
-      position: position,
     );
   }
 }

lib/model/extensions/controller_context.dart

@@ -0,0 +1,9 @@
+import 'package:flutter/material.dart';
+
+import '../../service/controller_scope.dart';
+
+extension ControllerContext on BuildContext {
+  T controller<T extends ChangeNotifier>() {
+    return ControllerScope.of<T>(this);
+  }
+}

lib/model/latlng.dart

@@ -4,4 +4,35 @@ class LatLng {
 
   LatLng(this.lat, this.lng);
   LatLng.empty() : lat = 0, lng = 0;
+
+  /// must be formatted 'double, double'. For example 35.35217, 89.19659
+  factory LatLng.fromString(String latLng) {
+    final splitString = latLng.split(',');
+    final lat = double.parse(splitString[0].trim());
+    final lng = double.parse(splitString[1].trim());
+
+    return LatLng(lat, lng);
+  }
+
+  factory LatLng.fromJson(Map<String, dynamic> json) {
+    return LatLng(json['lat'] as double, json['lng'] as double);
+  }
+
+  Map<String, double> toJson() {
+    return {'lat': lat, 'lng': lng};
+  }
+
+  @override
+  bool operator ==(Object other) {
+    if (other is! LatLng) return false;
+    return hashCode == other.hashCode;
+  }
+
+  @override
+  int get hashCode => Object.hash(lat, lng);
+
+  @override
+  String toString() {
+    return '${lat.toString()}, ${lng.toString()}';
+  }
 }

lib/model/location.dart

@@ -1,14 +1,34 @@
 import 'latlng.dart';
 
 class Location {
-  final String? _address;
+  final String name;
-  final LatLng? _coordinates;
+  final LatLng coordinates;
+  final String address;
 
-  Location({this._address, this._coordinates});
+  Location({required this.name, required this.coordinates, this.address = ''});
 
-  Location.fromAddress({required this._address}) : _coordinates = null;
+  factory Location.fromJson(Map<String, dynamic> json) {
-  Location.fromCoordinates({required this._coordinates}) : _address = null;
+    return Location(
+      name: json['name'] as String,
+      address: json['address'] as String,
+      coordinates: LatLng.fromJson(json['coordinates']),
+    );
+  }
 
-  String get address => _address ?? '';
+  Map<String, dynamic> toJson() {
-  LatLng get coordinates => _coordinates ?? LatLng.empty();
+    return {
+      'name': name,
+      'address': address,
+      'coordinates': coordinates.toJson(),
+    };
+  }
+
+  @override
+  bool operator ==(Object other) {
+    if (other is! Location) return false;
+    return hashCode == other.hashCode;
+  }
+
+  @override
+  int get hashCode => coordinates.hashCode;
 }

lib/model/location_alarm.dart

@@ -0,0 +1,40 @@
+import 'alarm.dart';
+import 'location.dart';
+
+class LocationAlarm implements Alarm {
+  @override
+  final String id;
+
+  @override
+  final String taskId;
+
+  final Location location;
+
+  final int radiusMeters;
+
+  const LocationAlarm({
+    required this.id,
+    required this.taskId,
+    required this.location,
+    required this.radiusMeters,
+  });
+
+  factory LocationAlarm.fromJson(Map<String, dynamic> json) {
+    return LocationAlarm(
+      id: json['id'] as String,
+      taskId: json['taskId'] as String,
+      location: Location.fromJson(json['location'] as Map<String, dynamic>),
+      radiusMeters: json['radiusMeters'] as int,
+    );
+  }
+
+  @override
+  Map<String, dynamic> toJson() {
+    return {
+      'id': id,
+      'taskId': taskId,
+      'location': location.toJson(),
+      'radiusMeters': radiusMeters,
+    };
+  }
+}

lib/model/repositories/interfaces/alarm_repository.dart

@@ -0,0 +1,19 @@
+import '../../alarm.dart';
+
+abstract class AlarmRepository {
+  // Create
+
+  Future<void> createAlarm(Alarm alarm);
+
+  // Read
+
+  Future<List<Alarm>> loadAlarms();
+
+  // Update
+
+  Future<void> updateAlarm(Alarm alarm);
+
+  // Delete
+
+  Future<void> deleteAlarm(Alarm alarm);
+}

lib/model/repositories/interfaces/location_repository.dart

@@ -0,0 +1,19 @@
+import '../../location.dart';
+
+abstract class LocationRepository {
+  // Create
+
+  Future<void> createLocation(Location location);
+
+  // Read
+
+  Future<List<Location>> loadLocations();
+
+  // Update
+
+  Future<void> updateLocation(Location location);
+
+  // Delete
+
+  Future<void> deleteLocation(Location location);
+}

lib/model/repositories/interfaces/task_repository.dart

@@ -0,0 +1,27 @@
+import '../../task.dart';
+
+abstract class TaskRepository {
+  // Create
+
+  Future<void> createTask(Task task);
+
+  Future<void> createTaskOrderEntry(String taskOrder);
+
+  // Read
+
+  Future<List<Task>> loadTasks();
+
+  Future<List<String>> loadTaskOrder();
+
+  // Update
+
+  Future<void> updateTask(Task task);
+
+  Future<void> updateTaskOrder(List<String> taskOrder);
+
+  // Delete
+
+  Future<void> deleteTask(Task task);
+
+  Future<void> deleteTaskOrderEntry(String taskOrderEntry);
+}

lib/model/repositories/local_repository.dart

@@ -0,0 +1,178 @@
+import 'dart:convert';
+
+import 'package:shared_preferences/shared_preferences.dart';
+
+import '../alarm.dart';
+import '../location.dart';
+import '../task.dart';
+import 'interfaces/alarm_repository.dart';
+import 'interfaces/location_repository.dart';
+import 'interfaces/task_repository.dart';
+
+class LocalRepository
+    implements TaskRepository, AlarmRepository, LocationRepository {
+  static const String _tasksKey = 'tasks';
+  static const String _taskOrderKey = 'taskOrder';
+  static const String _alarmsKey = 'alarms';
+  static const String _locationsKey = 'locations';
+
+  SharedPreferencesWithCache? _prefs;
+
+  Future<void> initialize() async {
+    if (_prefs == null) {
+      await SharedPreferencesWithCache.create(
+        cacheOptions: const SharedPreferencesWithCacheOptions(
+          allowList: <String>{
+            _tasksKey,
+            _taskOrderKey,
+            _alarmsKey,
+            _locationsKey,
+          },
+        ),
+      ).then((value) => _prefs = value);
+    }
+  }
+
+  Future<void> _saveTasks(List<Task> tasks) async {
+    final jsonList = tasks.map<String>((e) => jsonEncode(e.toJson())).toList();
+    _prefs!.setStringList(_tasksKey, jsonList);
+  }
+
+  Future<void> _saveLocations(List<Location> locations) async {
+    final jsonList = locations
+        .map<String>((e) => jsonEncode(e.toJson()))
+        .toList();
+    _prefs!.setStringList(_locationsKey, jsonList);
+  }
+
+  Future<void> _saveTaskOrder(List<String> taskOrder) async {
+    final jsonList = taskOrder.map((e) => jsonEncode(e)).toList();
+    return _prefs!.setStringList(_taskOrderKey, jsonList);
+  }
+
+  Future<void> _saveAlarms(List<Alarm> alarms) async {
+    final jsonList = alarms.map<String>((e) => jsonEncode(e.toJson())).toList();
+    return _prefs!.setStringList(_alarmsKey, jsonList);
+  }
+
+  // Create
+
+  @override
+  Future<void> createTask(Task task) async {
+    final tasks = await loadTasks();
+    tasks.add(task);
+    return _saveTasks(tasks);
+  }
+
+  @override
+  Future<void> createTaskOrderEntry(String taskOrderEntry) async {
+    final taskOrder = await loadTaskOrder();
+    taskOrder.add(taskOrderEntry);
+    return _saveTaskOrder(taskOrder);
+  }
+
+  @override
+  Future<void> createAlarm(Alarm alarm) async {
+    final alarms = await loadAlarms();
+    alarms.add(alarm);
+    _saveAlarms(alarms);
+  }
+
+  @override
+  Future<void> createLocation(Location location) async {
+    final locations = await loadLocations();
+    locations.add(location);
+    _saveLocations(locations);
+  }
+
+  // Read
+
+  @override
+  Future<List<Task>> loadTasks() async {
+    final Iterable<String> jsonList = _prefs!.getStringList(_tasksKey) ?? [];
+    return jsonList.map<Task>((e) => Task.fromJson(jsonDecode(e))).toList();
+  }
+
+  @override
+  Future<List<String>> loadTaskOrder() async {
+    final Iterable<String> jsonList =
+        _prefs!.getStringList(_taskOrderKey) ?? [];
+    return jsonList.map<String>((e) => jsonDecode(e)).toList();
+  }
+
+  @override
+  Future<List<Alarm>> loadAlarms() async {
+    final Iterable<String> jsonList = _prefs!.getStringList(_alarmsKey) ?? [];
+    return jsonList.map<Alarm>((e) => Alarm.fromJson(jsonDecode(e))).toList();
+  }
+
+  @override
+  Future<List<Location>> loadLocations() async {
+    final Iterable<String> jsonList =
+        _prefs!.getStringList(_locationsKey) ?? [];
+    return jsonList
+        .map<Location>((e) => Location.fromJson(jsonDecode(e)))
+        .toList();
+  }
+
+  // Update
+
+  @override
+  Future<void> updateTask(Task task) async {
+    final tasks = await loadTasks();
+    tasks.remove(task);
+    tasks.add(task);
+    return _saveTasks(tasks);
+  }
+
+  @override
+  Future<void> updateTaskOrder(List<String> taskOrder) async {
+    return _saveTaskOrder(taskOrder);
+  }
+
+  @override
+  Future<void> updateAlarm(Alarm alarm) async {
+    final alarms = await loadAlarms();
+    alarms.remove(alarm);
+    alarms.add(alarm);
+    _saveAlarms(alarms);
+  }
+
+  @override
+  Future<void> updateLocation(Location location) async {
+    final locations = await loadLocations();
+    locations.remove(location);
+    locations.add(location);
+    _saveLocations(locations);
+  }
+
+  // Delete
+
+  @override
+  Future<void> deleteTask(Task task) async {
+    final tasks = await loadTasks();
+    tasks.remove(task);
+    return _saveTasks(tasks);
+  }
+
+  @override
+  Future<void> deleteTaskOrderEntry(String taskOrderEntry) async {
+    final taskOrder = await loadTaskOrder();
+    taskOrder.remove(taskOrderEntry);
+    return _saveTaskOrder(taskOrder);
+  }
+
+  @override
+  Future<void> deleteAlarm(Alarm alarm) async {
+    final alarms = await loadAlarms();
+    alarms.remove(alarm);
+    _saveAlarms(alarms);
+  }
+
+  @override
+  Future<void> deleteLocation(Location location) async {
+    final locations = await loadLocations();
+    locations.remove(location);
+    _saveLocations(locations);
+  }
+}

lib/model/task.dart

@@ -9,10 +9,7 @@ class Task {
   final bool isCompleted;
   final String category;
   final List<Task> subtasks;
-  final List<DateTime> alarms;
-  final Location? location;
   final String url;
-  final int position;
 
   Task({
     required this.id,
@@ -23,10 +20,7 @@ class Task {
     this.isCompleted = false,
     this.category = '',
     this.subtasks = const [],
-    this.alarms = const [],
-    this.location,
     this.url = '',
-    required this.position,
   });
 
   Task copyWith({
@@ -41,7 +35,6 @@ class Task {
     List<DateTime>? alarms,
     Location? location,
     String? url,
-    int? position,
   }) {
     return Task(
       id: id ?? this.id,
@@ -52,10 +45,51 @@ class Task {
       isCompleted: isCompleted ?? this.isCompleted,
       category: category ?? this.category,
       subtasks: subtasks ?? this.subtasks,
-      alarms: alarms ?? this.alarms,
-      location: location ?? this.location,
       url: url ?? this.url,
-      position: position ?? this.position,
     );
   }
+
+  factory Task.fromJson(Map<String, dynamic> json) {
+    return Task(
+      id: json['id'] as String,
+      title: json['title'] as String,
+      description: json['description'] as String? ?? '',
+      start: json['start'] != null
+          ? DateTime.parse(json['start'] as String)
+          : null,
+      due: json['due'] != null ? DateTime.parse(json['due'] as String) : null,
+      isCompleted: json['isCompleted'] as bool? ?? false,
+      category: json['category'] as String? ?? '',
+      subtasks:
+          (json['subtasks'] as List<dynamic>?)
+              ?.map((e) => Task.fromJson(e as Map<String, dynamic>))
+              .toList() ??
+          [],
+      url: json['url'] as String? ?? '',
+    );
+  }
+
+  Map<String, dynamic> toJson() {
+    return {
+      'id': id,
+      'title': title,
+      'description': description,
+      'start': start?.toIso8601String(),
+      'due': due?.toIso8601String(),
+      'isCompleted': isCompleted,
+      'category': category,
+      'subtasks': subtasks.map((e) => e.toJson()).toList(),
+      'url': url,
+    };
+  }
+
+  @override
+  bool operator ==(Object other) {
+    if (other is! Task) return false;
+
+    return hashCode == other.hashCode;
+  }
+
+  @override
+  int get hashCode => id.hashCode;
 }

lib/model/time_alarm.dart

@@ -0,0 +1,34 @@
+import 'alarm.dart';
+
+class TimeAlarm implements Alarm {
+  @override
+  final String id;
+
+  @override
+  final String taskId;
+
+  final DateTime triggerAt;
+
+  const TimeAlarm({
+    required this.id,
+    required this.taskId,
+    required this.triggerAt,
+  });
+
+  factory TimeAlarm.fromJson(Map<String, dynamic> json) {
+    return TimeAlarm(
+      id: json['id'] as String,
+      taskId: json['taskId'] as String,
+      triggerAt: DateTime.parse(json['triggerAt'] as String),
+    );
+  }
+
+  @override
+  Map<String, dynamic> toJson() {
+    return {
+      'id': id,
+      'taskId': taskId,
+      'triggerAt': triggerAt.toIso8601String(),
+    };
+  }
+}

lib/pages/locations_overview_page.dart

@@ -0,0 +1,74 @@
+import 'package:flutter/material.dart';
+
+import '../model/extensions/controller_context.dart';
+import '../model/location.dart';
+import '../service/controllers/location_controller.dart';
+import '../widgets/dialogs/create_location_dialog.dart';
+
+class LocationsOverviewPage extends StatefulWidget {
+  static const routeName = '/locations';
+  const LocationsOverviewPage({super.key});
+
+  @override
+  State<LocationsOverviewPage> createState() => _LocationsOverviewPageState();
+}
+
+class _LocationsOverviewPageState extends State<LocationsOverviewPage> {
+  List<Location> locations = [];
+  @override
+  Widget build(BuildContext context) {
+    locations = context.controller<LocationController>().locations;
+
+    return Scaffold(
+      appBar: AppBar(title: Text('Manage Locations')),
+      body: Padding(
+        padding: EdgeInsetsGeometry.symmetric(
+          horizontal: MediaQuery.of(context).size.width * 0.05,
+        ),
+        child: ListView.builder(
+          itemBuilder: listViewBuilder,
+          itemCount: context.controller<LocationController>().locations.length,
+        ),
+      ),
+      floatingActionButton: FloatingActionButton(
+        onPressed: onAddLocationButtonPressed,
+        child: Icon(Icons.add),
+      ),
+    );
+  }
+
+  Widget listViewBuilder(BuildContext context, int index) {
+    final location = locations.elementAt(index);
+    final String subtitle = location.address.isEmpty
+        ? location.coordinates.toString()
+        : location.address;
+
+    return ListTile(
+      title: Text(location.name),
+      subtitle: Text(subtitle),
+      onTap: () => onEditLocationButtonPressed(location),
+    );
+  }
+
+  void onAddLocationButtonPressed() async {
+    final result = await showDialog<Location?>(
+      context: context,
+      builder: (context) => CreateLocationDialog(),
+      barrierDismissible: false,
+    );
+    if (mounted && result != null) {
+      context.controller<LocationController>().addLocation(result);
+    }
+  }
+
+  void onEditLocationButtonPressed(Location location) async {
+    final result = await showDialog<Location?>(
+      context: context,
+      builder: (context) => CreateLocationDialog(initialLocation: location),
+      barrierDismissible: false,
+    );
+    if (mounted && result != null) {
+      context.controller<LocationController>().updateLocation(location, result);
+    }
+  }
+}

lib/pages/task_edit_page.dart

@@ -1,18 +1,177 @@
 import 'package:flutter/material.dart';
 
+import '../app_theme.dart';
+import '../model/callback_models/create_task_request.dart';
+import '../model/extensions/controller_context.dart';
 import '../model/task.dart';
+import '../service/controllers/task_controller.dart';
+import '../service/tools.dart';
+import '../widgets/time_selector.dart';
 
-class TaskEditPage extends StatelessWidget {
+class TaskEditPage extends StatefulWidget {
   static const routeName = '/edit';
   const TaskEditPage({super.key});
 
   @override
-  Widget build(BuildContext context) {
+  State<TaskEditPage> createState() => _TaskEditPageState();
-    final task = ModalRoute.of(context)!.settings.arguments as Task?;
+}
 
+class _TaskEditPageState extends State<TaskEditPage> {
+  Task? task;
+  bool isInitialized = false;
+  final titleController = TextEditingController();
+  final descriptionController = TextEditingController();
+  final categoryController = TextEditingController();
+  final urlController = TextEditingController();
+  final dueDateController = TextEditingController();
+  final dueTimeController = TextEditingController();
+  String pageTitle = 'Create Task';
+  final dueDateFocusNode = FocusNode();
+  final dueTimeFocusNode = FocusNode();
+  final categoryFocusNode = FocusNode();
+  final formKey = GlobalKey<FormState>(debugLabel: 'taskEditFormKey');
+  bool didFormChange = false;
+  bool isDueTimeEnabled = false;
+
+  @override
+  void didChangeDependencies() {
+    super.didChangeDependencies();
+    task = ModalRoute.of(context)!.settings.arguments as Task?;
+    if (task != null && !isInitialized) {
+      titleController.text = task!.title;
+      descriptionController.text = task!.description;
+      categoryController.text = task!.category;
+      urlController.text = task!.url;
+      if (task!.due != null) {
+        dueDateController.text = getIsoDateString(task!.due!);
+        dueTimeController.text = TimeOfDay.fromDateTime(
+          task!.due!,
+        ).format(context);
+        isDueTimeEnabled = true;
+      }
+      isInitialized = true;
+      pageTitle = task!.title;
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
     return Scaffold(
-      appBar: AppBar(title: Text(task?.title ?? 'Create Task')),
+      appBar: AppBar(
-      body: Form(child: Column()),
+        title: Text(pageTitle),
+        actions: [
+          if (task != null)
+            IconButton(
+              onPressed: () {
+                context.controller<TaskController>().deleteTask(task!);
+                Navigator.of(context).pop();
+              },
+              icon: Icon(Icons.delete),
+            ),
+        ],
+      ),
+      body: Form(
+        canPop: !didFormChange,
+        onChanged: () => didFormChange = true,
+        onPopInvokedWithResult: onPopInvoked,
+        autovalidateMode: AutovalidateMode.onUnfocus,
+        key: formKey,
+        child: Padding(
+          padding: EdgeInsets.symmetric(
+            horizontal: MediaQuery.of(context).size.width * 0.05,
+          ),
+          child: Column(
+            spacing: AppTheme.formColumnSpacing,
+            children: [
+              SizedBox(height: 6),
+              TextFormField(
+                autofocus: true,
+                controller: titleController,
+                decoration: InputDecoration(label: Text('Title')),
+                keyboardType: TextInputType.text,
+                textInputAction: TextInputAction.next,
+              ),
+              TextFormField(
+                controller: descriptionController,
+                decoration: InputDecoration(label: Text('Description')),
+                keyboardType: TextInputType.multiline,
+                textInputAction: TextInputAction.newline,
+                minLines: 3,
+                maxLines: 10,
+              ),
+              TimeSelector(
+                initialDueDateTime: task?.due,
+                nextFocusNode: categoryFocusNode,
+                dueDateController: dueDateController,
+                dueTimeController: dueTimeController,
+                formKey: formKey,
+              ),
+              TextFormField(
+                focusNode: categoryFocusNode,
+                controller: categoryController,
+                decoration: InputDecoration(label: Text('Category')),
+                keyboardType: TextInputType.text,
+                textInputAction: TextInputAction.next,
+              ),
+              TextFormField(
+                controller: urlController,
+                decoration: InputDecoration(label: Text('Url')),
+                keyboardType: TextInputType.text,
+                textInputAction: TextInputAction.next,
+              ),
+            ],
+          ),
+        ),
+      ),
+      floatingActionButton: FloatingActionButton(
+        onPressed: onSavePressed,
+        child: Icon(Icons.save),
+      ),
     );
   }
+
+  void onSavePressed() {
+    Navigator.of(context).pop(
+      CreateTaskRequest(
+        title: titleController.text,
+        description: descriptionController.text,
+        start: null,
+        due: DateTime.tryParse(
+          '${dueDateController.text} ${dueTimeController.text}'.trim(),
+        ),
+        isCompleted: false,
+        category: categoryController.text,
+        subtasks: [],
+        url: urlController.text,
+      ),
+    );
+  }
+
+  void onPopInvoked(bool didPop, Object? result) {
+    if (!didPop) {
+      showDialog<bool>(
+        context: context,
+        builder: (context) => AlertDialog(
+          title: Text('Unsaved Changes'),
+          content: Text(
+            'Are you sure you want to cancel editing? Unsaved changes will be lost.',
+          ),
+          actions: [
+            TextButton(
+              onPressed: () => Navigator.of(context).pop(false),
+              child: Text('No'),
+            ),
+            TextButton(
+              onPressed: () => Navigator.of(context).pop(true),
+              child: Text('Yes'),
+            ),
+          ],
+        ),
+      ).then((result) {
+        if (result != null && result && mounted) {
+          Navigator.of(context).pop();
+        }
+      });
+    }
+  }
 }

lib/pages/task_overview_page.dart

@@ -1,7 +1,12 @@
 import 'package:flutter/material.dart';
 
-import '../example_data.dart';
+import '../model/callback_models/create_task_request.dart';
+import '../model/extensions/controller_context.dart';
 import '../model/task.dart';
+import '../service/controllers/task_controller.dart';
+import '../service/tools.dart';
+import '../widgets/task_dismissible.dart';
+import 'locations_overview_page.dart';
 import 'task_edit_page.dart';
 
 class TaskOverviewPage extends StatefulWidget {
@@ -13,16 +18,34 @@ class TaskOverviewPage extends StatefulWidget {
 }
 
 class _TaskOverviewPageState extends State<TaskOverviewPage> {
-  //TODO: Replace example data call
+  List<Task> get tasks => context.controller<TaskController>().orderedTasks;
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
-      appBar: AppBar(),
+      appBar: AppBar(
-      body: ReorderableListView.builder(
+        title: Text('Hallo Yannick'),
-        itemBuilder: itemBuilder,
+        actions: [
-        itemCount: tasks.length,
+          PopupMenuButton(
-        onReorderItem: (oldIndex, newIndex) =>
+            itemBuilder: (_) => [
-            reorderList(tasks, oldIndex, newIndex),
+              PopupMenuItem(
+                onTap: onLocationsButtonTapped,
+                child: Text('Locations'),
+              ),
+            ],
+            icon: Icon(Icons.more_vert),
+          ),
+        ],
+      ),
+      body: Padding(
+        padding: EdgeInsetsGeometry.symmetric(
+          horizontal: MediaQuery.of(context).size.width * 0.05,
+        ),
+        child: ReorderableListView.builder(
+          itemBuilder: itemBuilder,
+          itemCount: tasks.length,
+          onReorderItem: context.controller<TaskController>().reorderTask,
+        ),
       ),
       floatingActionButton: FloatingActionButton(
         onPressed: onCreateTaskTapped,
@@ -34,41 +57,54 @@ class _TaskOverviewPageState extends State<TaskOverviewPage> {
   Widget itemBuilder(BuildContext context, int index) {
     final task = tasks.elementAt(index);
 
-    return ListTile(
+    return Padding(
       key: Key(task.id),
-      title: Text(task.title),
+      padding: const EdgeInsets.only(bottom: 12),
-      subtitle: Text(task.description),
+      child: TaskDismissible(
-      onTap: () => onTaskTapped(task),
+        key: Key(task.id),
+        onDismissedRight: () =>
+            context.controller<TaskController>().deleteTask(task),
+        child: ListTile(
+          title: Text(task.title),
+          subtitle: task.description.isNotEmpty ? Text(task.description) : null,
+          trailing: Checkbox(
+            value: task.isCompleted,
+            onChanged: (isCompleted) => context
+                .controller<TaskController>()
+                .saveTask(task.copyWith(isCompleted: isCompleted)),
+          ),
+          onTap: () async {
+            final result = await onTaskTapped(task);
+            if (result != null && context.mounted) {
+              context.controller<TaskController>().saveTask(
+                result.toTask(id: task.id),
+              );
+            }
+          },
+        ),
+      ),
     );
   }
 
-  Future<Task?> onTaskTapped(Task task) async {
+  Future<CreateTaskRequest?> onTaskTapped(Task task) async {
     final result = await Navigator.of(
       context,
     ).pushNamed(TaskEditPage.routeName, arguments: task);
-    return result as Task?;
+    return result as CreateTaskRequest?;
-  }
-
-  List<Task> reorderList(List<Task> tasks, oldIndex, newIndex) {
-    final item = tasks.removeAt(oldIndex);
-    tasks.insert(newIndex, item);
-
-    final List<Task> reordered = [];
-
-    for (int i = 0; i < tasks.length; i++) {
-      reordered.add(tasks.elementAt(i).copyWith(position: i));
-    }
-
-    return reordered;
   }
 
   void onCreateTaskTapped() async {
-    //TODO: example data call
     final result =
-        await Navigator.of(context).pushNamed(TaskEditPage.routeName) as Task?;
+        await Navigator.of(context).pushNamed(TaskEditPage.routeName)
+            as CreateTaskRequest?;
 
-    if (result != null) {
+    if (result != null && mounted) {
-      tasks.add(result);
+      context.controller<TaskController>().saveTask(
+        result.toTask(id: generateId()),
+      );
     }
   }
+
+  void onLocationsButtonTapped() =>
+      Navigator.of(context).pushNamed(LocationsOverviewPage.routeName);
 }

lib/service/controller_scope.dart

@@ -0,0 +1,18 @@
+import 'package:flutter/widgets.dart';
+
+class ControllerScope<T extends ChangeNotifier> extends InheritedNotifier<T> {
+  const ControllerScope({
+    super.key,
+    required T controller,
+    required super.child,
+  }) : super(notifier: controller);
+
+  static T of<T extends ChangeNotifier>(BuildContext context) {
+    final scope = context
+        .dependOnInheritedWidgetOfExactType<ControllerScope<T>>();
+
+    assert(scope != null, 'No ControllerScope<$T> found in context');
+
+    return scope!.notifier!;
+  }
+}

lib/service/controllers/alarm_controller.dart

@@ -0,0 +1,31 @@
+import 'package:flutter/material.dart';
+
+import '../../model/alarm.dart';
+import '../../model/repositories/interfaces/alarm_repository.dart';
+
+class AlarmController extends ChangeNotifier {
+  AlarmController(AlarmRepository repository) : _repository = repository {
+    _loadAlarms();
+  }
+
+  final AlarmRepository _repository;
+
+  final List<Alarm> _alarms = [];
+
+  Future<void> addAlarm(Alarm alarm) {
+    _alarms.add(alarm);
+    notifyListeners();
+    return _repository.createAlarm(alarm);
+  }
+
+  Future<void> deleteAlarm(Alarm alarm) {
+    _alarms.remove(alarm);
+    notifyListeners();
+    return _repository.deleteAlarm(alarm);
+  }
+
+  Future<void> _loadAlarms() {
+    _alarms.clear();
+    return _repository.loadAlarms().then((value) => _alarms.addAll(value));
+  }
+}

lib/service/controllers/location_controller.dart

@@ -0,0 +1,45 @@
+import 'package:flutter/material.dart';
+
+import '../../model/location.dart';
+import '../../model/repositories/interfaces/location_repository.dart';
+
+class LocationController extends ChangeNotifier {
+  LocationController(LocationRepository repository) : _repository = repository {
+    _loadLocations();
+  }
+
+  final LocationRepository _repository;
+
+  final List<Location> _locations = [];
+
+  List<Location> get locations => _locations;
+
+  Future<void> addLocation(Location location) {
+    _locations.add(location);
+    notifyListeners();
+    return _repository.createLocation(location);
+  }
+
+  Future<void> deleteLocation(Location location) {
+    _locations.remove(location);
+    notifyListeners();
+    return _repository.deleteLocation(location);
+  }
+
+  Future<void> updateLocation(Location oldLocation, Location newLocation) {
+    final index = _locations.indexOf(oldLocation);
+    _locations.remove(oldLocation);
+    _locations.insert(index, newLocation);
+    notifyListeners();
+    return _repository
+        .deleteLocation(oldLocation)
+        .whenComplete(() => _repository.createLocation(newLocation));
+  }
+
+  Future<void> _loadLocations() {
+    _locations.clear();
+    return _repository.loadLocations().then(
+      (value) => _locations.addAll(value),
+    );
+  }
+}

lib/service/controllers/task_controller.dart

@@ -0,0 +1,64 @@
+import 'package:flutter/material.dart' show ChangeNotifier;
+
+import '../../model/repositories/interfaces/task_repository.dart';
+import '../../model/task.dart';
+
+class TaskController extends ChangeNotifier {
+  TaskController(TaskRepository repository) : _repository = repository {
+    Future.wait([
+      _loadTaskOrder(),
+      _loadTasks(),
+    ]).whenComplete(() => notifyListeners());
+  }
+
+  final TaskRepository _repository;
+
+  final List<Task> _tasks = [];
+  final List<String> _taskOrder = [];
+
+  List<Task> get orderedTasks {
+    final lookup = {for (final task in _tasks) task.id: task};
+
+    return _taskOrder.map((id) => lookup[id]!).toList();
+  }
+
+  Future<void> reorderTask(int oldIndex, int newIndex) async {
+    final taskId = _taskOrder.removeAt(oldIndex);
+    _taskOrder.insert(newIndex, taskId);
+    _repository.updateTaskOrder(_taskOrder);
+  }
+
+  Future<void> saveTask(Task task) async {
+    if (_tasks.contains(task)) {
+      _tasks.remove(task);
+      _tasks.add(task);
+      _repository.updateTask(task);
+    } else {
+      _tasks.add(task);
+      _taskOrder.add(task.id);
+      _repository.createTask(task);
+      _repository.updateTaskOrder(_taskOrder);
+    }
+    notifyListeners();
+  }
+
+  Future<void> deleteTask(Task task) async {
+    _tasks.remove(task);
+    _taskOrder.remove(task.id);
+    notifyListeners();
+    _repository.deleteTask(task);
+    _repository.updateTaskOrder(_taskOrder);
+  }
+
+  Future<void> _loadTasks() async {
+    _tasks.clear();
+    return _repository.loadTasks().then((value) => _tasks.addAll(value));
+  }
+
+  Future<void> _loadTaskOrder() async {
+    _taskOrder.clear();
+    return _repository.loadTaskOrder().then(
+      (value) => _taskOrder.addAll(value),
+    );
+  }
+}

lib/service/tools.dart

@@ -1 +1,5 @@
 String generateId() => DateTime.now().millisecondsSinceEpoch.toString();
+
+String getIsoDateString(DateTime dateTime) {
+  return dateTime.toIso8601String().substring(0, 10);
+}

lib/service/validators.dart

@@ -0,0 +1,28 @@
+String? timeValidator(String? value) {
+  if (value == null || value.isEmpty) return null;
+
+  if (RegExp(r'^([0-1]?[0-9]|2[0-3]):[0-5][0-9]$').hasMatch(value)) {
+    return null;
+  }
+  return 'Not a valid time format';
+}
+
+String? dateTimeValidator(String? value) {
+  if (value == null || value.isEmpty) return null;
+
+  return DateTime.tryParse(value) != null ? null : 'Not a date format';
+}
+
+String? coordinatesValidator(String? value) {
+  if (value == null || value.isEmpty) return null;
+
+  if (RegExp(r'^\d+\.?\d*, *\d+\.?\d*$').hasMatch(value)) {
+    return null;
+  }
+  return 'Not a valid coordinate format';
+}
+
+String? notEmptyValidator(String? value) {
+  if (value != null && value.isNotEmpty) return null;
+  return 'Can\'t be empty';
+}

lib/widgets/dialogs/create_location_dialog.dart

@@ -0,0 +1,93 @@
+import 'package:flutter/material.dart';
+
+import '../../app_theme.dart';
+import '../../model/latlng.dart';
+import '../../model/location.dart';
+import '../../service/validators.dart';
+
+class CreateLocationDialog extends StatefulWidget {
+  const CreateLocationDialog({super.key, this.initialLocation});
+  final Location? initialLocation;
+
+  @override
+  State<CreateLocationDialog> createState() => _CreateLocationDialogState();
+}
+
+class _CreateLocationDialogState extends State<CreateLocationDialog> {
+  final nameController = TextEditingController();
+  final addressController = TextEditingController();
+  final coordinatesController = TextEditingController();
+  final formKey = GlobalKey<FormState>(debugLabel: 'Create Location Form');
+
+  @override
+  void initState() {
+    if (widget.initialLocation != null) {
+      nameController.text = widget.initialLocation!.name;
+      addressController.text = widget.initialLocation!.address;
+      coordinatesController.text = widget.initialLocation!.coordinates
+          .toString();
+    }
+    super.initState();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return AlertDialog(
+      actions: [
+        TextButton(onPressed: onCancelPressed, child: Text('Cancel')),
+        TextButton(onPressed: onSavePressed, child: Text('Save')),
+      ],
+      title: Text('Create Location'),
+      content: Form(
+        key: formKey,
+        child: Column(
+          spacing: AppTheme.formColumnSpacing,
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            TextFormField(
+              autofocus: true,
+              textInputAction: TextInputAction.next,
+              controller: nameController,
+              keyboardType: TextInputType.text,
+              decoration: InputDecoration(labelText: 'Name'),
+              validator: notEmptyValidator,
+            ),
+            TextFormField(
+              textInputAction: TextInputAction.next,
+              controller: addressController,
+              keyboardType: TextInputType.streetAddress,
+              decoration: InputDecoration(labelText: 'Address (optional)'),
+            ),
+            TextFormField(
+              textInputAction: TextInputAction.done,
+              controller: coordinatesController,
+              onFieldSubmitted: (_) => onSavePressed(),
+              keyboardType: TextInputType.numberWithOptions(),
+              decoration: InputDecoration(
+                labelText: 'Coordinates',
+                hint: Text('25.5892, 50.5051662'),
+              ),
+              validator: (value) {
+                return notEmptyValidator(value) ?? coordinatesValidator(value);
+              },
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+
+  void onCancelPressed() => Navigator.of(context).pop();
+
+  void onSavePressed() {
+    if (formKey.currentState!.validate()) {
+      Navigator.of(context).pop(
+        Location(
+          name: nameController.text,
+          coordinates: LatLng.fromString(coordinatesController.text),
+          address: addressController.text,
+        ),
+      );
+    }
+  }
+}

lib/widgets/task_dismissible.dart

@@ -0,0 +1,44 @@
+import 'package:flutter/material.dart';
+
+class TaskDismissible extends StatelessWidget {
+  const TaskDismissible({
+    required super.key,
+    this.onDismissedRight,
+    required this.child,
+  });
+
+  final VoidCallback? onDismissedRight;
+  final Widget child;
+
+  @override
+  Widget build(BuildContext context) {
+    return Dismissible(
+      key: key!,
+      direction: DismissDirection.startToEnd,
+      background: Container(
+        decoration: BoxDecoration(
+          borderRadius: BorderRadius.circular(12),
+          color: Theme.of(context).colorScheme.error,
+        ),
+        child: Align(
+          alignment: AlignmentGeometry.centerLeft,
+          child: Padding(
+            padding: const EdgeInsets.symmetric(horizontal: 12),
+            child: Icon(
+              Icons.delete,
+              color: Theme.of(context).colorScheme.onError,
+            ),
+          ),
+        ),
+      ),
+      onDismissed: onDismissed,
+      child: child,
+    );
+  }
+
+  void onDismissed(DismissDirection direction) {
+    if (direction == DismissDirection.startToEnd && onDismissedRight != null) {
+      onDismissedRight!();
+    }
+  }
+}

lib/widgets/time_selector.dart

@@ -0,0 +1,141 @@
+import 'package:flutter/material.dart';
+
+import '../service/tools.dart' show getIsoDateString;
+import '../service/validators.dart';
+
+class TimeSelector extends StatefulWidget {
+  const TimeSelector({
+    super.key,
+    this.initialDueDateTime,
+    this.nextFocusNode,
+    required this.dueDateController,
+    required this.dueTimeController,
+    this.formKey,
+  });
+
+  final DateTime? initialDueDateTime;
+  final GlobalKey<FormState>? formKey;
+  final FocusNode? nextFocusNode;
+  final TextEditingController dueDateController;
+  final TextEditingController dueTimeController;
+
+  @override
+  State<TimeSelector> createState() => _TimeSelectorState();
+}
+
+class _TimeSelectorState extends State<TimeSelector> {
+  final dueDateFocusNode = FocusNode();
+
+  final dueTimeFocusNode = FocusNode();
+
+  bool isDueTimeEnabled = false;
+
+  @override
+  void initState() {
+    isDueTimeEnabled = widget.initialDueDateTime != null;
+    super.initState();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Flex(
+      direction: Axis.horizontal,
+
+      children: [
+        Flexible(
+          flex: 3,
+          child: TextFormField(
+            focusNode: dueDateFocusNode,
+            controller: widget.dueDateController,
+            onChanged: maybeEnableDueTime,
+            onFieldSubmitted: (_) {
+              isDueTimeEnabled
+                  ? dueDateFocusNode.nextFocus()
+                  : widget.nextFocusNode?.requestFocus();
+            },
+            decoration: InputDecoration(
+              label: Text('Due Date'),
+              suffixIcon: IconButton(
+                onPressed: () async {
+                  final result = await onOpenCalendarPickerPressed();
+                  if (result != null) {
+                    final dateString = getIsoDateString(result);
+                    widget.dueDateController.text = dateString;
+                    maybeEnableDueTime(dateString);
+                    widget.formKey?.currentState?.validate();
+                    dueTimeFocusNode.requestFocus();
+                  }
+                },
+                icon: Icon(Icons.calendar_month),
+              ),
+            ),
+            validator: dateTimeValidator,
+            keyboardType: TextInputType.datetime,
+            textInputAction: TextInputAction.next,
+          ),
+        ),
+        Padding(padding: EdgeInsetsGeometry.only(left: 10)),
+        Flexible(
+          flex: 2,
+          child: TextFormField(
+            focusNode: dueTimeFocusNode,
+            onFieldSubmitted: (_) => dueTimeFocusNode.nextFocus(),
+            controller: widget.dueTimeController,
+            enabled: isDueTimeEnabled,
+            decoration: InputDecoration(
+              label: Text('Due Time'),
+              suffixIcon: IconButton(
+                onPressed: () async {
+                  final result = await onOpenTimePickerPressed();
+                  if (result != null && context.mounted) {
+                    widget.dueTimeController.text = result.format(context);
+                    widget.nextFocusNode?.requestFocus();
+                  }
+                },
+                icon: Icon(Icons.schedule),
+              ),
+            ),
+            validator: timeValidator,
+            keyboardType: TextInputType.text,
+            textInputAction: TextInputAction.next,
+          ),
+        ),
+      ],
+    );
+  }
+
+  Future<DateTime?> onOpenCalendarPickerPressed() {
+    return showDialog<DateTime?>(
+      context: context,
+      builder: (context) => DatePickerDialog(
+        firstDate: DateTime(DateTime.now().year - 100),
+        lastDate: DateTime(DateTime.now().year + 100),
+        initialDate:
+            DateTime.tryParse(widget.dueDateController.text) ?? DateTime.now(),
+      ),
+    );
+  }
+
+  Future<TimeOfDay?> onOpenTimePickerPressed() {
+    return showDialog<TimeOfDay?>(
+      context: context,
+      builder: (context) => TimePickerDialog(
+        initialTime: TimeOfDay.fromDateTime(
+          widget.initialDueDateTime ?? DateTime.now(),
+        ),
+      ),
+    );
+  }
+
+  void maybeEnableDueTime(String value) {
+    if (value.isNotEmpty && dateTimeValidator(value) == null) {
+      setState(() {
+        isDueTimeEnabled = true;
+      });
+    } else if (isDueTimeEnabled) {
+      setState(() {
+        isDueTimeEnabled = false;
+      });
+    }
+  }
+}

pubspec.lock

@@ -49,6 +49,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.3.3"
+  ffi:
+    dependency: transitive
+    description:
+      name: ffi
+      sha256: "6d7fd89431262d8f3125e81b50d3847a091d846eafcd4fdb88dd06f36d705a45"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.0"
+  file:
+    dependency: transitive
+    description:
+      name: file
+      sha256: a3b4f84adafef897088c160faf7dfffb7696046cb13ae90b508c2cbc95d3b8d4
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.0.1"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -67,6 +83,11 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  flutter_web_plugins:
+    dependency: transitive
+    description: flutter
+    source: sdk
+    version: "0.0.0"
   leak_tracker:
     dependency: transitive
     description:
@@ -131,6 +152,102 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.9.1"
+  path_provider_linux:
+    dependency: transitive
+    description:
+      name: path_provider_linux
+      sha256: f7a1fe3a634fe7734c8d3f2766ad746ae2a2884abe22e241a8b301bf5cac3279
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.1"
+  path_provider_platform_interface:
+    dependency: transitive
+    description:
+      name: path_provider_platform_interface
+      sha256: "88f5779f72ba699763fa3a3b06aa4bf6de76c8e5de842cf6f29e2e06476c2334"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.2"
+  path_provider_windows:
+    dependency: transitive
+    description:
+      name: path_provider_windows
+      sha256: bd6f00dbd873bfb70d0761682da2b3a2c2fccc2b9e84c495821639601d81afe7
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.3.0"
+  platform:
+    dependency: transitive
+    description:
+      name: platform
+      sha256: "5d6b1b0036a5f331ebc77c850ebc8506cbc1e9416c27e59b439f917a902a4984"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.6"
+  plugin_platform_interface:
+    dependency: transitive
+    description:
+      name: plugin_platform_interface
+      sha256: "4820fbfdb9478b1ebae27888254d445073732dae3d6ea81f0b7e06d5dedc3f02"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.8"
+  shared_preferences:
+    dependency: "direct main"
+    description:
+      name: shared_preferences
+      sha256: c3025c5534b01739267eb7d76959bbc25a6d10f6988e1c2a3036940133dd10bf
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.5.5"
+  shared_preferences_android:
+    dependency: transitive
+    description:
+      name: shared_preferences_android
+      sha256: "93ae5884a9df5d3bb696825bceb3a17590754548b5d740eba51500afc8d088f5"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.26"
+  shared_preferences_foundation:
+    dependency: transitive
+    description:
+      name: shared_preferences_foundation
+      sha256: "4e7eaffc2b17ba398759f1151415869a34771ba11ebbccd1b0145472a619a64f"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.5.6"
+  shared_preferences_linux:
+    dependency: transitive
+    description:
+      name: shared_preferences_linux
+      sha256: "580abfd40f415611503cae30adf626e6656dfb2f0cee8f465ece7b6defb40f2f"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.1"
+  shared_preferences_platform_interface:
+    dependency: transitive
+    description:
+      name: shared_preferences_platform_interface
+      sha256: "649dc798a33931919ea356c4305c2d1f81619ea6e92244070b520187b5140ef9"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.2"
+  shared_preferences_web:
+    dependency: transitive
+    description:
+      name: shared_preferences_web
+      sha256: c49bd060261c9a3f0ff445892695d6212ff603ef3115edbb448509d407600019
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.3"
+  shared_preferences_windows:
+    dependency: transitive
+    description:
+      name: shared_preferences_windows
+      sha256: "94ef0f72b2d71bc3e700e025db3710911bd51a71cefb65cc609dd0d9a982e3c1"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.1"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -200,6 +317,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "15.2.0"
+  web:
+    dependency: transitive
+    description:
+      name: web
+      sha256: "868d88a33d8a87b18ffc05f9f030ba328ffefba92d6c127917a2ba740f9cfe4a"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.1"
+  xdg_directories:
+    dependency: transitive
+    description:
+      name: xdg_directories
+      sha256: "7a3f37b05d989967cdddcbb571f1ea834867ae2faa29725fd085180e0883aa15"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.0"
 sdks:
   dart: ">=3.12.1 <4.0.0"
-  flutter: ">=3.18.0-18.0.pre.54"
+  flutter: ">=3.44.0"

pubspec.yaml

@@ -9,6 +9,7 @@ environment:
 dependencies:
   flutter:
     sdk: flutter
+  shared_preferences: ^2.5.5
 
 dev_dependencies:
   flutter_test: