add notification test

covas_mobile/lib/classes/notification_service.dart

@@ -0,0 +1,82 @@
+import 'package:flutter_local_notifications/flutter_local_notifications.dart';
+import 'package:timezone/timezone.dart' as tz;
+import 'package:timezone/data/latest_all.dart' as tz;
+
+class NotificationService {
+  static final FlutterLocalNotificationsPlugin _notificationsPlugin =
+      FlutterLocalNotificationsPlugin();
+
+  /// Initialisation (à appeler dans main())
+  static Future<void> initialize() async {
+    tz.initializeTimeZones();
+
+    const AndroidInitializationSettings androidInitSettings =
+        AndroidInitializationSettings('@mipmap/ic_launcher');
+
+    const InitializationSettings initSettings = InitializationSettings(
+      android: androidInitSettings,
+      iOS: DarwinInitializationSettings(),
+    );
+
+    await _notificationsPlugin.initialize(initSettings);
+  }
+
+  /// Planifie une notification 1h avant l’évènement
+  static Future<void> scheduleEventNotification({
+    required String eventId,
+    required String title,
+    required String body,
+    required DateTime eventDate,
+  }) async {
+    final scheduledDate = eventDate.subtract(const Duration(hours: 1));
+
+    if (scheduledDate.isBefore(DateTime.now())) {
+      // Trop tard pour notifier
+      return;
+    }
+
+    await _notificationsPlugin.zonedSchedule(
+      eventId.hashCode, // identifiant unique pour l’évènement
+      title,
+      body,
+      tz.TZDateTime.from(scheduledDate, tz.local),
+      const NotificationDetails(
+        android: AndroidNotificationDetails(
+          'events_channel', // id du canal
+          'Évènements', // nom du canal
+          channelDescription: 'Notifications des évènements favoris',
+          importance: Importance.high,
+          priority: Priority.high,
+        ),
+        iOS: DarwinNotificationDetails(),
+      ),
+      androidScheduleMode: AndroidScheduleMode.inexactAllowWhileIdle,
+      uiLocalNotificationDateInterpretation:
+          UILocalNotificationDateInterpretation.absoluteTime,
+      matchDateTimeComponents: DateTimeComponents.dateAndTime,
+    );
+  }
+
+  static Future<void> showTestNotification() async {
+    await _notificationsPlugin.show(
+      0, // id arbitraire
+      "Test Notification",
+      "Ceci est une notification de debug",
+      const NotificationDetails(
+        android: AndroidNotificationDetails(
+          'debug_channel',
+          'Debug Notifications',
+          channelDescription: 'Notifications de test pour debug',
+          importance: Importance.max,
+          priority: Priority.high,
+        ),
+        iOS: DarwinNotificationDetails(),
+      ),
+    );
+  }
+
+  /// Annule une notification planifiée
+  static Future<void> cancel(String eventId) async {
+    await _notificationsPlugin.cancel(eventId.hashCode);
+  }
+}