MOBILE-2795 notifications: Check is triggered on plugin

src/providers/local-notifications.ts

@@ -298,7 +298,7 @@ export class CoreLocalNotificationsProvider {
         return this.appDB.getRecord(this.TRIGGERED_TABLE, { id: notification.id }).then((stored) => {
             return stored.at === notification.at.getTime() / 1000;
         }).catch(() => {
-            return false;
+            return this.localNotifications.isTriggered(notification.id);
         });
     }
 
@@ -478,6 +478,8 @@ export class CoreLocalNotificationsProvider {
     protected scheduleNotification(notification: CoreILocalNotification): Promise<any> {
         // Check if the notification has been triggered already.
         return this.isTriggered(notification).then((triggered) => {
+            // Cancel the current notification in case it gets scheduled twice.
+            return this.localNotifications.cancel(notification.id).finally(() => {
                 if (!triggered) {
                     // Check if sound is enabled for notifications.
                     return this.configProvider.get(CoreConstants.SETTINGS_NOTIFICATION_SOUND, true).then((soundEnabled) => {
@@ -489,12 +491,11 @@ export class CoreLocalNotificationsProvider {
 
                         // Remove from triggered, since the notification could be in there with a different time.
                         this.removeTriggered(notification.id);
-                    this.localNotifications.cancel(notification.id).finally(() => {
                         this.localNotifications.schedule(notification);
                     });
-                });
                 }
             });
+        });
     }
 
     /**