95 lines
2.4 KiB
Dart
95 lines
2.4 KiB
Dart
import 'dart:convert';
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import 'package:shared_preferences/shared_preferences.dart';
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import '../task.dart';
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import 'interfaces/task_repository.dart';
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class LocalRepository implements TaskRepository {
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static const String _tasksKey = 'tasks';
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static const String _taskOrderKey = 'taskOrder';
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SharedPreferencesWithCache? _prefs;
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Future<void> initialize() async {
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if (_prefs == null) {
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await SharedPreferencesWithCache.create(
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cacheOptions: const SharedPreferencesWithCacheOptions(
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allowList: <String>{_tasksKey, _taskOrderKey},
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),
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).then((value) => _prefs = value);
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}
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}
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Future<void> _saveTasks(List<Task> tasks) async {
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final jsonList = tasks.map<String>((e) => jsonEncode(e.toJson())).toList();
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_prefs!.setStringList(_tasksKey, jsonList);
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}
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Future<void> _saveTaskOrder(List<String> taskOrder) async {
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final jsonList = taskOrder.map((e) => jsonEncode(e)).toList();
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return _prefs!.setStringList(_taskOrderKey, jsonList);
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}
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// Create
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@override
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Future<void> createTask(Task task) async {
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final tasks = await loadTasks();
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tasks.add(task);
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return _saveTasks(tasks);
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}
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@override
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Future<void> createTaskOrderEntry(String taskOrderEntry) async {
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final taskOrder = await loadTaskOrder();
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taskOrder.add(taskOrderEntry);
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return _saveTaskOrder(taskOrder);
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}
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// Read
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@override
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Future<List<Task>> loadTasks() async {
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final Iterable<String> jsonList = _prefs!.getStringList(_tasksKey) ?? [];
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return jsonList.map<Task>((e) => Task.fromJson(jsonDecode(e))).toList();
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}
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@override
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Future<List<String>> loadTaskOrder() async {
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final Iterable<String> jsonList =
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_prefs!.getStringList(_taskOrderKey) ?? [];
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return jsonList.map<String>((e) => jsonDecode(e)).toList();
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}
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// Update
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@override
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Future<void> updateTask(Task task) async {
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final tasks = await loadTasks();
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tasks.remove(task);
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tasks.add(task);
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return _saveTasks(tasks);
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}
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@override
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Future<void> updateTaskOrder(List<String> taskOrder) async {
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return _saveTaskOrder(taskOrder);
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}
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// Delete
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@override
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Future<void> deleteTask(Task task) async {
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final tasks = await loadTasks();
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tasks.remove(task);
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return _saveTasks(tasks);
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}
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@override
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Future<void> deleteTaskOrderEntry(String taskOrderEntry) async {
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final taskOrder = await loadTaskOrder();
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taskOrder.remove(taskOrderEntry);
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return _saveTaskOrder(taskOrder);
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}
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}
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