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rose-ash/cart
giles 1f36987f77
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Replace inter-service _handlers dicts with declarative sx defquery/defaction
The inter-service data layer (fetch_data/call_action) was the least
structured part of the codebase — Python _handlers dicts with ad-hoc
param extraction scattered across 16 route files. This replaces them
with declarative .sx query/action definitions that make the entire
inter-service protocol self-describing and greppable.

Infrastructure:
- defquery/defaction special forms in the sx evaluator
- Query/action registry with load, lookup, and schema introspection
- Query executor using async_eval with I/O primitives
- Blueprint factories (create_data_blueprint/create_action_blueprint)
  with sx-first dispatch and Python fallback
- /internal/schema endpoint on every service
- parse-datetime and split-ids primitives for type coercion

Service extractions:
- LikesService (toggle, is_liked, liked_slugs, liked_ids)
- PageConfigService (ensure, get_by_container, get_by_id, get_batch, update)
- RelationsService (wraps module-level functions)
- AccountDataService (user_by_email, newsletters)
- CartItemsService, MarketDataService (raw SQLAlchemy lookups)

50 of 54 handlers converted to sx, 4 Python fallbacks remain
(ghost-sync/push-member, clear-cart-for-order, create-order).
Net: -1,383 lines Python, +251 lines modified.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-03-04 08:13:50 +00:00
..
2026-02-24 20:13:00 +00:00

Cart App

Shopping cart, checkout, and order management service for the Rose Ash cooperative. Integrates with SumUp for payment processing.

Structure

app.py                  # Application factory (create_base_app + blueprints)
path_setup.py           # Adds project root + app dir to sys.path
entrypoint.sh           # Container entrypoint (Redis flush, start)
bp/
  cart/                 # Cart blueprint
    global_routes.py    #   Add to cart, checkout, webhooks, return page
    page_routes.py      #   Page-scoped cart and checkout
    overview_routes.py  #   Cart overview / summary page
    services/           #   Business logic
      checkout.py       #     Order creation, SumUp integration
      check_sumup_status.py  #  Payment status polling
      calendar_cart.py  #     Calendar entry cart queries
      page_cart.py      #     Page-scoped cart queries
      get_cart.py       #     Cart item queries
      identity.py       #     Cart identity (user_id / session_id)
      total.py          #     Price calculations
      clear_cart_for_order.py  # Soft-delete cart after checkout
  order/                # Single order detail view
  orders/               # Order listing view
  fragments/            # cart-mini fragment, account-nav-item fragment
models/                 # Re-export stubs (Order, OrderItem, PageConfig)
services/               # register_domain_services() — wires cart + calendar + market
templates/              # Cart-specific templates (override shared/)

Cart identity

Cart items are keyed by user_id (logged in) or session_id (anonymous). On login, anonymous cart items are adopted to the user's account.

Cross-domain communication

  • services.calendar.* — claim/confirm entries for orders, adopt on login
  • services.market.* — marketplace queries for page-scoped carts
  • services.blog.* — post lookup for page context

Fragments served

  • cart-mini — cart icon + badge count
  • account-nav-item — orders link for account nav

Checkout flow

  1. User clicks "Checkout"
  2. create_order_from_cart() creates Order + OrderItems
  3. services.calendar.claim_entries_for_order() marks entries as "ordered"
  4. Emits Create / rose:Order activity
  5. SumUp hosted checkout created, user redirected
  6. SumUp webhook / return page triggers check_sumup_status()
  7. If PAID: services.calendar.confirm_entries_for_order(), emits rose:OrderPaid