Ability to pass promotion and coupon ID into the query string

I have implemented the functionality to add coupons as a new URL parameter. The logic checks each coupon string individually to determine whether it is a coupon code or a coupon ID, then applies it to the cart accordingly.

I have not yet written tests for this new functionality. Your contributions would be appreciated if anyone is available to take on that task.

dlevchik → changed the visibility of the branch 3222915-ability-to-pass to hidden.

dlevchik → changed the visibility of the branch 3222915-ability-to-pass to active.

Tested locally, fixed some coupons apply errors, like checking if coupon already applied, and checking promotion conditions. Added functional tests for this

Note: I think that this is strange that products in a URL use array syntax, while coupons use separating with ','. Maybe owned should look into it

Re the syntax if you apply my patch here: https://git.drupalcode.org/project/direct_checkout_by_url/-/merge_reques... you can use commas

See: https://www.drupal.org/project/direct_checkout_by_url/issues/3436719#com... 🐛 Can't add more than one item to cart when using comma list and reset cart Needs review