feat: 重构会话管理与提醒通知系统

apps/lib/core/notification/services/reminder_scheduler_service.dart

@@ -12,10 +12,12 @@ class ReminderSchedulerService {
   ReminderSchedulerService({FlutterLocalNotificationsPlugin? plugin})
     : _plugin = plugin ?? FlutterLocalNotificationsPlugin();
 
-  static const String _channelId = 'calendar_reminder_alarm_v2';
+  static const String _channelId = 'calendar_reminder_alarm_v3';
   static const String _channelName = 'Schedule alarm';
   static const String _channelDescription =
       'Alarm-style notifications for scheduled events';
+  static const String _androidSoundResource = 'reminder_1';
+  static const String _iosSoundFile = 'reminder_1.wav';
 
   final FlutterLocalNotificationsPlugin _plugin;
   final List<void Function(ReminderNotificationTap tap)> _tapCallbacks = [];
@@ -45,6 +47,8 @@ class ReminderSchedulerService {
         _channelName,
         description: _channelDescription,
         importance: Importance.max,
+        playSound: true,
+        sound: RawResourceAndroidNotificationSound(_androidSoundResource),
       ),
     );
 
@@ -120,9 +124,18 @@ class ReminderSchedulerService {
     DateTime? now,
   }) async {
     await _ensureInitialized();
-    await cancelEventReminders(event.eventId);
     final alarms = buildAlarmsForEvent(event, now: now);
-    for (final alarm in alarms) {
+    final pending = await _plugin.pendingNotificationRequests();
+    final plan = buildUpsertPlan(
+      eventId: event.eventId,
+      pending: pending,
+      desired: alarms,
+    );
+
+    for (final id in plan.idsToCancel) {
+      await _plugin.cancel(id);
+    }
+    for (final alarm in plan.alarmsToSchedule) {
       await _scheduleAlarm(alarm);
     }
   }
@@ -252,6 +265,7 @@ class ReminderSchedulerService {
       category: AndroidNotificationCategory.alarm,
       timeoutAfter: 15000,
       playSound: true,
+      sound: RawResourceAndroidNotificationSound(_androidSoundResource),
       enableVibration: true,
       fullScreenIntent: false,
       ticker: 'calendar-reminder',
@@ -259,6 +273,7 @@ class ReminderSchedulerService {
     const iosDetails = DarwinNotificationDetails(
       presentAlert: true,
       presentSound: true,
+      sound: _iosSoundFile,
       interruptionLevel: InterruptionLevel.timeSensitive,
     );
 
@@ -344,6 +359,77 @@ class ReminderSchedulerService {
     return hash;
   }
 
+  static int notificationIdFor(String eventId, int fireTimeBucket) {
+    return _notificationId(eventId, fireTimeBucket);
+  }
+
+  static ReminderUpsertPlan buildUpsertPlan({
+    required String eventId,
+    required List<PendingNotificationRequest> pending,
+    required List<ReminderAlarm> desired,
+  }) {
+    final desiredById = <int, ReminderAlarm>{
+      for (final alarm in desired)
+        _notificationId(alarm.eventId, alarm.fireTimeBucket): alarm,
+    };
+
+    final existingPayloadById = <int, Map<String, dynamic>>{};
+    for (final request in pending) {
+      final raw = request.payload;
+      if (raw == null || raw.isEmpty) {
+        continue;
+      }
+      final payload = _parsePayload(raw);
+      if (payload['eventId'] != eventId) {
+        continue;
+      }
+      existingPayloadById[request.id] = payload;
+    }
+
+    final idsToCancel = <int>[];
+    for (final entry in existingPayloadById.entries) {
+      final desiredAlarm = desiredById[entry.key];
+      if (desiredAlarm == null) {
+        idsToCancel.add(entry.key);
+        continue;
+      }
+      if (!_matchesAlarmPayload(entry.value, desiredAlarm)) {
+        idsToCancel.add(entry.key);
+      }
+    }
+
+    final alarmsToSchedule = <ReminderAlarm>[];
+    for (final entry in desiredById.entries) {
+      final existingPayload = existingPayloadById[entry.key];
+      if (existingPayload == null ||
+          !_matchesAlarmPayload(existingPayload, entry.value)) {
+        alarmsToSchedule.add(entry.value);
+      }
+    }
+
+    return ReminderUpsertPlan(
+      idsToCancel: idsToCancel,
+      alarmsToSchedule: alarmsToSchedule,
+    );
+  }
+
+  static bool _matchesAlarmPayload(
+    Map<String, dynamic> payload,
+    ReminderAlarm alarm,
+  ) {
+    return payload['eventId'] == alarm.eventId &&
+        payload['title'] == alarm.title &&
+        payload['startAt'] == alarm.startAt.toIso8601String() &&
+        payload['endAt'] == alarm.endAt?.toIso8601String() &&
+        payload['timezone'] == alarm.timezone &&
+        payload['reminderMinutes'] == alarm.reminderMinutes &&
+        payload['fireAt'] == alarm.fireAt.toIso8601String() &&
+        payload['fireTimeBucket'] == alarm.fireTimeBucket &&
+        payload['location'] == alarm.location &&
+        payload['notes'] == alarm.notes &&
+        payload['version'] == alarm.version;
+  }
+
   static tz.Location _safeLocation(String timezone) {
     try {
       return tz.getLocation(timezone);
@@ -353,6 +439,16 @@ class ReminderSchedulerService {
   }
 }
 
+class ReminderUpsertPlan {
+  const ReminderUpsertPlan({
+    required this.idsToCancel,
+    required this.alarmsToSchedule,
+  });
+
+  final List<int> idsToCancel;
+  final List<ReminderAlarm> alarmsToSchedule;
+}
+
 @pragma('vm:entry-point')
 void _onBackgroundTap(NotificationResponse response) {
   debugPrint('Background reminder tap received: ${response.payload}');