ShopifyAPI::Webhooks::Registry doesn't update webhooks if metafield_namespaces has changed

[fmichaut-diff]

Overview/summary

ShopifyAPI::Webhooks::Registry#webhook_registration_needed? only checks that the address of the webhook is the same.
If anything else changed (metafield_namespaces, fields, private_metafield_namespaces, format) the webhook will be considered up to date and will be skipped.

The (Graphql and Rest) API supports update operations on Webhooks, so it should be trivial for the ShopifyAPI::Webhooks::Registry to implement updates for existing webhooks.

Basically the behaviour should be as follow :

• No webhook existing for that address + topic ? -> create it
• If webhook exist, check if other parameters (fields, metafields, ...) are up to date. If not -> update it
• Otherwise all is good, we don't have to do anything

[lizkenyon]

Hi there 👋

Thanks for flagging this!

I agree that this is an improvement that we should do. The team will look into this!