Accounting integration for iOS payment

[bedhub]

When receiving webhook callbacks from the apple payment system i want that they are tracked in the booking system so that our database state is consistent.

AC

• Booking items are created
  • when upgrading to a paid account
  • cancelling to free account
  • switching to higher/lower plan
  • renewing subscription
• Booking items should be created with a set totalInvoicedCount in case of upgrade or renewals
• Booking items include the price in € independent which foreign currency was used
• Monthly / yearly subscription are reflected in the Booking items
• The end date is tracked correctly (renewal, upgrade to higher plan).
• KPIs are tracked to count upgrades/downgrades
• When the payment method iOS is configure there should be additional restrictions
  • Account termination is not allowed
  • Adding and reactivating users is prevented.
  • Granting credit is not allowed

*Tasks

• [x] Create booking items
• [x] Implement restrictions
• [x] Switch subscription when we receive notification from Apple
• [x] Check if InvoiceBatchJob will work if payment method was changed from AppStore before the run
• [x] Add state diagram for account state + notifications + user actions
• [ ] Bug: It is possible to switch plans without changing App Store Subscription

[charlag]

Issues found so far:

• fixed: When changing the subscription (canceled, then subscribed to another one before end of the period) the posting currentCount is wrong
• fixed: If subscription has expired then plan settings do not trigger app store dialog
  • fixed: going to Payment settings fails with 500 ("Cannot calculate invoice for business invoices or non-referral credit invoices without country")
• if subscription was canceled via appStore and account was downgraded to Free via the app it is not possible to change plans anymore. AppStoreSubscriptionsBatchJob does not remove the subscription until it expires and SwitchAccountTypeService won't let you change the account type while the subscription is still active.
• if subscription was canceled via app store and then another one was selected in the app store we do not update the plan

[paw-hub]

Regarding "Adding and reactivating users is prevented.", it should not be possible to switch to App Store from anything other than Free, and downgrading to Free removes the ability to create multiple users. As such, I don't think we need to do anything there?

[charlag]

Regarding "Adding and reactivating users is prevented.", it should not be possible to switch to App Store from anything other than Free, and downgrading to Free removes the ability to create multiple users. As such, I don't think we need to do anything there?

yeah should be good