67 lines
2.3 KiB
Dart
67 lines
2.3 KiB
Dart
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import 'package:flutter/material.dart';
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import 'package:flutter_local_notifications/flutter_local_notifications.dart';
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import 'package:timezone/timezone.dart' as tz;
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class NotificationService {
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static final _plugin = FlutterLocalNotificationsPlugin();
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static bool _initialised = false;
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static const _channelId = 'daily_reminder';
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static const _notificationId = 0;
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static Future<void> init() async {
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if (_initialised) return;
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const android = AndroidInitializationSettings('@mipmap/ic_launcher');
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await _plugin.initialize(
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settings: const InitializationSettings(android: android),
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);
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_initialised = true;
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}
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static Future<bool> requestPermission() async {
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final android = _plugin.resolvePlatformSpecificImplementation<
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AndroidFlutterLocalNotificationsPlugin>();
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return (await android?.requestNotificationsPermission()) ?? false;
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}
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static Future<void> scheduleDaily(TimeOfDay time) async {
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await _plugin.cancelAll();
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const details = NotificationDetails(
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android: AndroidNotificationDetails(
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_channelId,
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'Daily reminder',
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channelDescription: 'Reminds you to log your mood',
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importance: Importance.defaultImportance,
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priority: Priority.defaultPriority,
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),
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);
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await _plugin.zonedSchedule(
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id: _notificationId,
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title: 'DailyYou',
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body: 'Time to log your mood!',
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scheduledDate: _nextInstanceOfTime(time.hour, time.minute),
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notificationDetails: details,
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androidScheduleMode: AndroidScheduleMode.inexactAllowWhileIdle,
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matchDateTimeComponents: DateTimeComponents.time,
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);
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}
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static Future<void> cancelAll() => _plugin.cancelAll();
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static tz.TZDateTime _nextInstanceOfTime(int hour, int minute) {
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final now = tz.TZDateTime.now(tz.UTC);
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final offset = DateTime.now().timeZoneOffset;
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var targetMinutes = hour * 60 + minute - offset.inMinutes;
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// Normalise into [0, 24*60)
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targetMinutes = ((targetMinutes % (24 * 60)) + 24 * 60) % (24 * 60);
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final utcHour = targetMinutes ~/ 60;
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final utcMin = targetMinutes % 60;
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var scheduled =
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tz.TZDateTime(tz.UTC, now.year, now.month, now.day, utcHour, utcMin);
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if (scheduled.isBefore(now)) {
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scheduled = scheduled.add(const Duration(days: 1));
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}
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return scheduled;
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}
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}
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