Split cart into 4 microservices: relations, likes, orders, page-config→blog

Phase 1 - Relations service (internal): owns ContainerRelation, exposes
get-children data + attach/detach-child actions. Retargeted events, blog,
market callers from cart to relations.

Phase 2 - Likes service (internal): unified Like model replaces ProductLike
and PostLike with generic target_type/target_slug/target_id. Exposes
is-liked, liked-slugs, liked-ids data + toggle action.

Phase 3 - PageConfig → blog: moved ownership to blog with direct DB queries,
removed proxy endpoints from cart.

Phase 4 - Orders service (public): owns Order/OrderItem + SumUp checkout
flow. Cart checkout now delegates to orders via create-order action.
Webhook/return routes and reconciliation moved to orders.

Phase 5 - Infrastructure: docker-compose, deploy.sh, Dockerfiles updated
for all 3 new services. Added orders_url helper and factory model imports.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

orders/bp/actions/routes.py

@@ -0,0 +1,108 @@
+"""Orders app action endpoints."""
+from __future__ import annotations
+
+from quart import Blueprint, g, jsonify, request
+
+from shared.infrastructure.actions import ACTION_HEADER
+
+
+def register() -> Blueprint:
+    bp = Blueprint("actions", __name__, url_prefix="/internal/actions")
+
+    @bp.before_request
+    async def _require_action_header():
+        if not request.headers.get(ACTION_HEADER):
+            return jsonify({"error": "forbidden"}), 403
+        from shared.infrastructure.internal_auth import validate_internal_request
+        if not validate_internal_request():
+            return jsonify({"error": "forbidden"}), 403
+
+    _handlers: dict[str, object] = {}
+
+    @bp.post("/<action_name>")
+    async def handle_action(action_name: str):
+        handler = _handlers.get(action_name)
+        if handler is None:
+            return jsonify({"error": "unknown action"}), 404
+        try:
+            result = await handler()
+            return jsonify(result)
+        except Exception as exc:
+            import logging
+            logging.getLogger(__name__).exception("Action %s failed", action_name)
+            return jsonify({"error": str(exc)}), 500
+
+    # --- create-order ---
+    async def _create_order():
+        """Create an order from cart data. Called by cart during checkout."""
+        from shared.browser.app.payments.sumup import create_checkout as sumup_create_checkout
+        from shared.infrastructure.urls import orders_url
+        from services.checkout import (
+            create_order,
+            resolve_page_config_from_post_id,
+            build_sumup_description,
+            build_sumup_reference,
+            build_webhook_url,
+        )
+
+        data = await request.get_json(force=True)
+
+        cart_items = data.get("cart_items", [])
+        calendar_entries = data.get("calendar_entries", [])
+        tickets = data.get("tickets", [])
+        user_id = data.get("user_id")
+        session_id = data.get("session_id")
+        product_total = data.get("product_total", 0)
+        calendar_total = data.get("calendar_total", 0)
+        ticket_total = data.get("ticket_total", 0)
+        page_post_id = data.get("page_post_id")
+
+        order = await create_order(
+            g.s, cart_items, calendar_entries,
+            user_id, session_id,
+            product_total, calendar_total,
+            ticket_total=ticket_total,
+            page_post_id=page_post_id,
+        )
+
+        page_config = None
+        if page_post_id:
+            page_config = await resolve_page_config_from_post_id(page_post_id)
+
+        if page_config:
+            order.page_config_id = page_config.id
+
+        order.sumup_reference = build_sumup_reference(order.id, page_config=page_config)
+        description = build_sumup_description(cart_items, order.id, ticket_count=len(tickets))
+
+        # Build URLs using orders service's own domain
+        redirect_url = orders_url(f"/checkout/return/{order.id}/")
+        webhook_base_url = orders_url(f"/checkout/webhook/{order.id}/")
+        webhook_url = build_webhook_url(webhook_base_url)
+
+        checkout_data = await sumup_create_checkout(
+            order,
+            redirect_url=redirect_url,
+            webhook_url=webhook_url,
+            description=description,
+            page_config=page_config,
+        )
+        order.sumup_checkout_id = checkout_data.get("id")
+        order.sumup_status = checkout_data.get("status")
+        order.description = checkout_data.get("description")
+        hosted_cfg = checkout_data.get("hosted_checkout") or {}
+        hosted_url = hosted_cfg.get("hosted_checkout_url") or checkout_data.get("hosted_checkout_url")
+        order.sumup_hosted_url = hosted_url
+        await g.s.flush()
+
+        return {
+            "order_id": order.id,
+            "sumup_hosted_url": hosted_url,
+            "page_config_id": order.page_config_id,
+            "sumup_reference": order.sumup_reference,
+            "description": order.description,
+        }
+
+    _handlers["create-order"] = _create_order
+
+    return bp