james
cc07ac3230
Sync the shop-coupons capability plus the order, frontend-mall, and frontend-shop-admin requirements into the main specs, and write the capability Purpose the archive leaves as a placeholder. Renaming the coupon scenario in the flash-sales and group-buying order deltas to the exact name now in the main order spec keeps those changes archivable, since a MODIFIED requirement replaces the whole block.
2.2 KiB
shop-coupons Specification
Purpose
Let a shop issue its own coupons and a customer claim and redeem them. A template owns the offer, window, and claim stock; claiming copies the terms into a customer-owned snapshot so later edits cannot rewrite a held coupon. Checkout redeems at most one owned coupon per generated shop order, applies a server-calculated discount, and restores the coupon when a pending-payment order is cancelled. Activity-priced shop orders reject coupons rather than stack.
Requirements
Requirement: Shop coupon template management
A shop_owner or shop_staff SHALL create, list, update, disable, and delete only that shop's coupon templates. A template SHALL contain localized title, fixed amount_minor, threshold_minor, enabled ISO currency, non-negative claim stock, and an inclusive active window; amount MUST be positive and threshold MUST NOT be negative.
Scenario: cross-shop template is hidden
- WHEN a shop user requests or mutates another shop's coupon template
- THEN the API returns 404
Requirement: Customer coupon claim and listing
An authenticated customer SHALL list owned coupons and claim an active template at most once. Claiming SHALL atomically create a user-held snapshot and decrement claim stock only when stock remains; listing SHALL distinguish claimed, redeemed, and expired coupons.
Scenario: concurrent final claim
- WHEN two customers claim the final remaining template instance concurrently
- THEN exactly one claim succeeds and the other receives 409
Requirement: Coupon redemption lifecycle
A claimed coupon SHALL be redeemable only by its owner, for its issuing shop, within its snapshot window, and when the shop-order subtotal reaches its snapshot threshold. Redemption SHALL bind the coupon to one order; cancellation of that pending-payment order SHALL restore it to claimed. Later activity-priced shop orders (flash sale or group buy) SHALL NOT redeem a coupon; those changes restated this exclusion on checkout.
Scenario: cancelled order restores coupon
- WHEN a customer cancels a pending-payment order redeemed with a coupon
- THEN the coupon again has claimed status and no order binding