fixed rp api

backend/app/shopping/context.py

@@ -0,0 +1,47 @@
+from typing import Any
+
+from sqlalchemy.orm import Session
+
+from app.shopping.service import ShoppingService
+
+MAX_LISTS_IN_CONTEXT = 8
+MAX_ITEMS_PER_LIST = 12
+
+
+def get_shopping_snapshot(db: Session) -> dict[str, Any]:
+    return ShoppingService(db).snapshot()
+
+
+def format_shopping_context(snapshot: dict[str, Any]) -> str:
+    lines = ["[Списки покупок]"]
+    lists = snapshot.get("lists") or []
+
+    if not lists:
+        lines.append("Списков пока нет. create_shopping_list или add_shopping_items.")
+        return "\n".join(lines)
+
+    lines.append(
+        f"Всего списков: {snapshot.get('list_count', len(lists))}, "
+        f"неотмеченных позиций: {snapshot.get('unchecked_items', 0)}."
+    )
+    lines.append("Для изменений вызывай tools: list_shopping_lists, add_shopping_items, check_shopping_item.")
+
+    for lst in lists[:MAX_LISTS_IN_CONTEXT]:
+        items = lst.get("items") or []
+        unchecked = [i for i in items if not i.get("checked")]
+        preview = unchecked[:MAX_ITEMS_PER_LIST]
+        parts = []
+        for item in preview:
+            qty = item.get("quantity")
+            unit = (item.get("unit") or "").strip()
+            label = item["text"]
+            if qty is not None:
+                label = f"{label} ({qty}{' ' + unit if unit else ''})"
+            parts.append(f"#{item['id']} {label}")
+        tail = f" +{len(unchecked) - len(preview)} ещё" if len(unchecked) > len(preview) else ""
+        if parts:
+            lines.append(f"- «{lst['name']}» (#{lst['id']}): {', '.join(parts)}{tail}")
+        else:
+            lines.append(f"- «{lst['name']}» (#{lst['id']}): всё отмечено или пусто")
+
+    return "\n".join(lines)