Donations: Fall back to default products if no products are already defined.

[kwight]

The Donations block will rely on membership products existing to give the site visitor options for donating. If the user inserts a Donations block but does not already have some USD subscription products set up, the block will call the new POST /memberships/products endpoint (Automattic/jetpack#16242) to generate some default products.

Part of #42856 .

Testing Instructions

• cd apps/full-site-editing; yarn dev --sync;
• Sandbox the API and the store. More info in PCYsg-lW4-p2 #sandbox-method
• Sandbox a test site with a paid plan, and ensure the site has the fse-donations-block blog sticker applied (if not, it can be done from the site's Blog RC).
• At /earn/payments-plans/:site, delete any existing test products.
• With devtools open, add a Donations block in a new post with the block editor.
• Connect to Stripe in development mode if necessary.
• Verify a successful call was made to /memberships/products?type=donation&currency=USD.

[matticbot]

Test live: https://calypso.live/?branch=add/donations-block-add-defaults

[matticbot]

This PR does not affect the size of JS and CSS bundles shipped to the user's browser.

Generated by performance advisor bot at iscalypsofastyet.com.

[matticbot]

Caution: This PR affects files in the FSE Plugin on WordPress.com
Please ensure your changes work on WordPress.com before merging.

D45454-code has been created so you can easily test it on your sandbox. See this FieldGuide page about developing in the FSE Plugin for more info: PCYsg-ly5-p2

[mmtr]

We'd need to check there are products for the current currency as well. Right now if you remove all the donation-type plans (AFAIK can be done only with wp shell) and create a few for a currency other than USD, no default plans for USD will be created.

I also think we need to check that returned products contains all intervals and run fetchDefaultProducts if any is missing (the API will create only the missing ones, duplicates prevention is handled in D45327-code).

[kwight]

AFAIK can be done only with wp shell

Ah, found this today: WP.com API v1.1 POST /sites/:site-id/memberships/product/:product-id/delete (got it from the Earn UI when deleting from there). And it has to be the site ID – the domain doesn't work, for some reason.

[gwwar]

Should we add a dev flag for managing this in the Calypso UI? (eg simply return all products in the earn management section) It might be helpful for general debugging

[kwight]

f613589 should take care of the additional checks. I did notice though, that all three defaults were generated even with existing valid intervals, so I'm not sure if that's a bug with what I've done, or the generation.

[mmtr]

that all three defaults were generated even with existing valid intervals

Note that the defaults endpoint will return any valid existing plan. It'll create only missing plans. That means the endpoint will return always the 3 plans, but it doesn't mean all of them were generated during the request.

[mmtr]

Note that the defaults endpoint will return any valid existing plan. It'll create only missing plans. That means the endpoint will return always the 3 plans, but it doesn't mean all of them were generated during the request.

I confirmed this by deleting a valid plan using the delete endpoint mentioned above and inserting the block. Only one new plan was created and the endpoint keeps returning the existing ones.

[mmtr]

LGTM