Support for fully discounted carts and GraphQL improvements

w3cdatalayer

• Fixed a bug that causes the datalayer to panic if it failed to build an absolute url
• Introduced a configuration option to choose between base64url and hex encoding for the hashed values
• Move config to commerce namespace, from w3cDatalayer to commerce.w3cDatalayer
• Add legacy config mapping so old mappings can still be used
• Add cue based config to have config validation in place

checkout

• Controller
  • Allow checkout for fully discounted carts without payment processing. Previously all checkouts needed a valid payment to continue.
    In case there is nothing to pay this can be skipped.
    • Order ID will be reserved as soon as the user hits the checkout previously it was done before starting the payment
• GraphQL
  • Update place order process to also allow zero carts which don't need payment, this leads to a state flow that lacks the payment steps.
    See module readme for further details.
• Update source service to support external location codes.
  • Adds ExternalLocationCode to the Source struct.
  • Update SetSourcesForCartItems() to use the new SourcingServiceDetail functionality if the bound service implements the interface
• Update OrderService to expose more metrics regarding the place order process:

  flamingo-commerce/checkout/orders/cart_validation_failed
  flamingo-commerce/checkout/orders/no_payment_selection
  flamingo-commerce/checkout/orders/payment_gateway_not_found
  flamingo-commerce/checkout/orders/payment_flow_status_error
  flamingo-commerce/checkout/orders/order_payment_from_flow_error
  flamingo-commerce/checkout/orders/payment_flow_status_failed_canceled
  flamingo-commerce/checkout/orders/payment_flow_status_aborted
  flamingo-commerce/checkout/orders/place_order_failed
  flamingo-commerce/checkout/orders/place_order_successful
  

cart

• inMemoryBehaviour: Allow custom logic for GiftCard / Voucher handling
  • We introduced two new interfaces GiftCardHandler + VoucherHandler
  • This enables users of the in-memory cart to add project specific gift card and voucher handling
• Fix CreateInitialDeliveryIfNotPresent so that cache gets updated now when an initial delivery is created
• GraphQL: Add new cart validation query Commerce_Cart_Validator to check if cart contains valid items

price

• IsZero() now uses LikelyEqual() instead of Equal() to avoid issues occurring due to floating-point arithmetic

product

• product attributes:
  • Added AttributesByKey domain method to filter attributes by key and exposed this method as getAttributesByKey in GraphQL
  • GraphQL: Exposing codeLabel property in the Commerce_ProductAttribute type

payment

• Introduced error message for already used idempotency key