added fitness

backend/app/integrations/openfoodfacts.py

@@ -0,0 +1,62 @@
+from typing import Any
+
+import httpx
+
+from app.config import get_settings
+
+
+class OpenFoodFactsClient:
+    def __init__(self) -> None:
+        settings = get_settings()
+        self.base_url = settings.openfoodfacts_base_url.rstrip("/")
+
+    def search(self, query: str, limit: int = 5) -> list[dict[str, Any]]:
+        with httpx.Client(timeout=20.0) as client:
+            response = client.get(
+                f"{self.base_url}/cgi/search.pl",
+                params={
+                    "search_terms": query,
+                    "search_simple": 1,
+                    "action": "process",
+                    "json": 1,
+                    "page_size": limit,
+                    "lc": "ru",
+                },
+            )
+            response.raise_for_status()
+            products = response.json().get("products") or []
+
+        out: list[dict[str, Any]] = []
+        for p in products[:limit]:
+            nutriments = p.get("nutriments") or {}
+            out.append(
+                {
+                    "name": p.get("product_name") or p.get("product_name_ru") or query,
+                    "brand": p.get("brands", ""),
+                    "barcode": p.get("code"),
+                    "calories_per_100g": nutriments.get("energy-kcal_100g"),
+                    "protein_g_per_100g": nutriments.get("proteins_100g"),
+                    "fat_g_per_100g": nutriments.get("fat_100g"),
+                    "carbs_g_per_100g": nutriments.get("carbohydrates_100g"),
+                }
+            )
+        return out
+
+    def get_by_barcode(self, barcode: str) -> dict[str, Any] | None:
+        with httpx.Client(timeout=20.0) as client:
+            response = client.get(f"{self.base_url}/api/v2/product/{barcode}.json")
+            if response.status_code == 404:
+                return None
+            response.raise_for_status()
+            product = response.json().get("product")
+            if not product:
+                return None
+            nutriments = product.get("nutriments") or {}
+            return {
+                "name": product.get("product_name") or product.get("product_name_ru"),
+                "barcode": barcode,
+                "calories_per_100g": nutriments.get("energy-kcal_100g"),
+                "protein_g_per_100g": nutriments.get("proteins_100g"),
+                "fat_g_per_100g": nutriments.get("fat_100g"),
+                "carbs_g_per_100g": nutriments.get("carbohydrates_100g"),
+            }