How to manage recurring Cloudfunctions with variable timeintervals?

Question

Hi i am making a Moneymanagement app where i want to have the option to automatically create recurring payments. So when the user creates a transation on lets say 01.01.2020, i would do it like this:

transaction

• initialDate = 01.01.2020
• intervall = weekly
• recurringDate = 08.01.2020

then, if its possible, i want to make a cloudfunction that runs daily and checks

• if recurringDate is today
• then createNewTransaction
• increment recurringDate += intervall

My questions are : How do i process dates ?

For example if the recurringDate == 28.01.2020 and intervall = weekly, it wouldn't make sense to set new recurringDate to 35.01.2020.

Is there a better way to do this ?

Thanks !

Answer 1

See Scheduling compute instances with Cloud Scheduler which uses Cloud Scheduler

Because of the potential importance of the scheduling, you should strongly consider:

• provide an audit trail of the schedules that you create for your users
• a backup scheduling mechanism for when the GCP are unavailable