Flutter/firebase: execute function at specific time

Question

How can I execute a function at a specific time with flutter and firebase? I want to allow the user of my app to send messages to other users at a specific time. Right now, they are sent when the message is created, but I would like to allow the user to schedule the message.

Any idea? I have looked at the Timer class of Flutter, but it does not seem to be useful for this.

You want the app to send the message on behalf on a user. You could schedule a background task on the device, which calls the function. https://stackoverflow.com/questions/51706265/how-to-schedule-background-tasks-in-flutter I don't know if this works. — Ben Butterworth, May 06 '20 at 09:13

score 1 · Accepted Answer · answered May 06 '20 at 09:05

1

According to me handling this on flutter(frontend) will be a bad idea. You can look into firebase cloud function and scheduling of cloud functions to achieve the result. For example, you can have a boolean to show/hide the message in your message model and use cloud function to update it accordingly on the scheduled time.

answered May 06 '20 at 09:05

Shubham Gupta

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But this requires an internet connection, can I do that offline? – Ali Hussein Al-Issa Apr 16 '21 at 10:45
But how will you send it offline, you'll require some kind of trigger? – Shubham Gupta Apr 16 '21 at 12:02
I don't want to send anything from backend, I need to do some work everyday at 00:00, for example make a local backup from user's date like whatsapp. – Ali Hussein Al-Issa Apr 16 '21 at 14:10
did you check [workmanager](https://pub.dev/packages/workmanager) ? I think that will solve your issue. – Shubham Gupta Apr 17 '21 at 10:37

Flutter/firebase: execute function at specific time

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