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I am trying to build an Android app using Kotlin that sends a push notification to the user's device using FCM in Firebase when one of their items are expiring soon. However, I have not been able to figure out how to trigger the notification based on the expiry date stored in the Firestore Database for a specific item. In Firebase -> Engage -> Cloud Messaging -> Notifications -> New Notification, it seems like you can only schedule a notification based on a fixed date.

Is there a way to trigger the notification based on a value stored in the Firestore Database instead?

Logic should be: If current_date > expiry_date then trigger push notification.

Thanks in advance.

Rickster
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Cloud Firestore does not feature any such event, but one can schedule a Cloud Function:

https://firebase.google.com/docs/functions/schedule-functions

Martin Zeitler
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