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>

blog/bp/data/routes.py

@@ -7,7 +7,7 @@ from __future__ import annotations
 
 from quart import Blueprint, g, jsonify, request
 
-from shared.infrastructure.data_client import DATA_HEADER, fetch_data
+from shared.infrastructure.data_client import DATA_HEADER
 from shared.contracts.dtos import dto_to_dict
 from shared.services.registry import services
 
@@ -74,31 +74,112 @@ def register() -> Blueprint:
 
     _handlers["search-posts"] = _search_posts
 
-    # --- page-config (proxy to cart, where page_configs table lives) ---
+    # --- page-config-ensure ---
+    async def _page_config_ensure():
+        """Get or create a PageConfig for a container_type + container_id."""
+        from sqlalchemy import select
+        from shared.models.page_config import PageConfig
+
+        container_type = request.args.get("container_type", "page")
+        container_id = request.args.get("container_id", type=int)
+        if container_id is None:
+            return {"error": "container_id required"}, 400
+
+        row = (await g.s.execute(
+            select(PageConfig).where(
+                PageConfig.container_type == container_type,
+                PageConfig.container_id == container_id,
+            )
+        )).scalar_one_or_none()
+
+        if row is None:
+            row = PageConfig(
+                container_type=container_type,
+                container_id=container_id,
+                features={},
+            )
+            g.s.add(row)
+            await g.s.flush()
+
+        return {
+            "id": row.id,
+            "container_type": row.container_type,
+            "container_id": row.container_id,
+        }
+
+    _handlers["page-config-ensure"] = _page_config_ensure
+
+    # --- page-config ---
     async def _page_config():
         """Return a single PageConfig by container_type + container_id."""
-        return await fetch_data("cart", "page-config",
-            params={"container_type": request.args.get("container_type", "page"),
-                     "container_id": request.args.get("container_id", "")},
-            required=False)
+        from sqlalchemy import select
+        from shared.models.page_config import PageConfig
+
+        ct = request.args.get("container_type", "page")
+        cid = request.args.get("container_id", type=int)
+        if cid is None:
+            return None
+        pc = (await g.s.execute(
+            select(PageConfig).where(
+                PageConfig.container_type == ct,
+                PageConfig.container_id == cid,
+            )
+        )).scalar_one_or_none()
+        if not pc:
+            return None
+        return _page_config_dict(pc)
 
     _handlers["page-config"] = _page_config
 
-    # --- page-config-by-id (proxy to cart) ---
+    # --- page-config-by-id ---
     async def _page_config_by_id():
-        return await fetch_data("cart", "page-config-by-id",
-            params={"id": request.args.get("id", "")},
-            required=False)
+        """Return a single PageConfig by its primary key."""
+        from shared.models.page_config import PageConfig
+
+        pc_id = request.args.get("id", type=int)
+        if pc_id is None:
+            return None
+        pc = await g.s.get(PageConfig, pc_id)
+        if not pc:
+            return None
+        return _page_config_dict(pc)
 
     _handlers["page-config-by-id"] = _page_config_by_id
 
-    # --- page-configs-batch (proxy to cart) ---
+    # --- page-configs-batch ---
     async def _page_configs_batch():
-        return await fetch_data("cart", "page-configs-batch",
-            params={"container_type": request.args.get("container_type", "page"),
-                     "ids": request.args.get("ids", "")},
-            required=False) or []
+        """Return PageConfigs for multiple container_ids (comma-separated)."""
+        from sqlalchemy import select
+        from shared.models.page_config import PageConfig
+
+        ct = request.args.get("container_type", "page")
+        ids_raw = request.args.get("ids", "")
+        if not ids_raw:
+            return []
+        ids = [int(x.strip()) for x in ids_raw.split(",") if x.strip()]
+        if not ids:
+            return []
+        result = await g.s.execute(
+            select(PageConfig).where(
+                PageConfig.container_type == ct,
+                PageConfig.container_id.in_(ids),
+            )
+        )
+        return [_page_config_dict(pc) for pc in result.scalars().all()]
 
     _handlers["page-configs-batch"] = _page_configs_batch
 
     return bp
+
+
+def _page_config_dict(pc) -> dict:
+    """Serialize PageConfig to a JSON-safe dict."""
+    return {
+        "id": pc.id,
+        "container_type": pc.container_type,
+        "container_id": pc.container_id,
+        "features": pc.features or {},
+        "sumup_merchant_code": pc.sumup_merchant_code,
+        "sumup_api_key": pc.sumup_api_key,
+        "sumup_checkout_prefix": pc.sumup_checkout_prefix,
+    }