integrate barcode scan with openfoodfacts and meal type selection

apps/admin/src/app/api/food/barcode/[code]/route.ts

@@ -0,0 +1,156 @@
+import { NextResponse } from "next/server";
+import { auth } from "@clerk/nextjs/server";
+import { getUserMembershipContext } from "@/lib/membership/access";
+import log from "@/lib/logger";
+
+interface OpenFoodFactsProduct {
+  product_name?: string;
+  product_name_en?: string;
+  brands?: string;
+  image_url?: string;
+  image_front_url?: string;
+  serving_size?: string;
+  nutriments?: {
+    [key: string]: number | string | undefined;
+    "energy-kcal_serving"?: number;
+    "energy-kcal_100g"?: number;
+    proteins_serving?: number;
+    proteins_100g?: number;
+    carbohydrates_serving?: number;
+    carbohydrates_100g?: number;
+    fat_serving?: number;
+    fat_100g?: number;
+  };
+}
+
+interface OpenFoodFactsResponse {
+  status: number;
+  code: string;
+  product?: OpenFoodFactsProduct;
+}
+
+function normalizeBarcode(rawCode: string): string {
+  return rawCode.replace(/\D/g, "").trim();
+}
+
+function isSupportedBarcode(code: string): boolean {
+  return [8, 12, 13].includes(code.length);
+}
+
+function getNumber(value: unknown): number | undefined {
+  if (typeof value === "number" && Number.isFinite(value)) return value;
+  if (typeof value === "string") {
+    const parsed = Number(value);
+    if (Number.isFinite(parsed)) return parsed;
+  }
+  return undefined;
+}
+
+function buildProductPayload(code: string, product: OpenFoodFactsProduct) {
+  const caloriesPerServing =
+    getNumber(product.nutriments?.["energy-kcal_serving"]) ??
+    getNumber(product.nutriments?.["energy-kcal_100g"]) ??
+    0;
+
+  const protein =
+    getNumber(product.nutriments?.proteins_serving) ??
+    getNumber(product.nutriments?.proteins_100g);
+  const carbs =
+    getNumber(product.nutriments?.carbohydrates_serving) ??
+    getNumber(product.nutriments?.carbohydrates_100g);
+  const fat =
+    getNumber(product.nutriments?.fat_serving) ??
+    getNumber(product.nutriments?.fat_100g);
+
+  return {
+    barcode: code,
+    name: product.product_name || product.product_name_en || "Unknown Product",
+    brand: product.brands || null,
+    imageUrl: product.image_url || product.image_front_url || null,
+    servingSize: product.serving_size || "1 serving",
+    caloriesPerServing: Math.max(0, Math.round(caloriesPerServing)),
+    macros: {
+      protein: protein ?? null,
+      carbs: carbs ?? null,
+      fat: fat ?? null,
+    },
+    source: "openfoodfacts" as const,
+  };
+}
+
+export async function GET(
+  _request: Request,
+  { params }: { params: Promise<{ code: string }> },
+) {
+  try {
+    const { userId } = await auth();
+    if (!userId) {
+      return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+    }
+
+    const { features, membershipType } = await getUserMembershipContext(userId);
+    if (!features.nutritionTracking) {
+      return NextResponse.json(
+        {
+          error:
+            "Barcode food scan is available on Premium and VIP memberships",
+          membershipType,
+        },
+        { status: 403 },
+      );
+    }
+
+    const { code: rawCode } = await params;
+    const code = normalizeBarcode(rawCode);
+
+    if (!isSupportedBarcode(code)) {
+      return NextResponse.json(
+        { error: "Invalid barcode. Use EAN-8, UPC-A, or EAN-13 formats." },
+        { status: 400 },
+      );
+    }
+
+    const response = await fetch(
+      `https://world.openfoodfacts.org/api/v2/product/${code}.json`,
+      {
+        headers: {
+          "User-Agent": "FitAI/1.0 (fitai.app)",
+        },
+        cache: "no-store",
+      },
+    );
+
+    if (!response.ok) {
+      log.warn("OpenFoodFacts lookup failed", {
+        status: response.status,
+        barcode: code,
+      });
+      return NextResponse.json(
+        { error: "Food lookup service unavailable. Please try again." },
+        { status: 503 },
+      );
+    }
+
+    const payload = (await response.json()) as OpenFoodFactsResponse;
+    if (payload.status !== 1 || !payload.product) {
+      return NextResponse.json(
+        { error: "Product not found in OpenFoodFacts" },
+        { status: 404 },
+      );
+    }
+
+    return NextResponse.json({
+      success: true,
+      data: buildProductPayload(code, payload.product),
+      meta: {
+        timestamp: new Date().toISOString(),
+      },
+    });
+  } catch (error) {
+    log.error("Failed barcode food lookup", error);
+    return NextResponse.json(
+      { error: "Failed to lookup food barcode" },
+      { status: 500 },
+    );
+  }
+}

apps/mobile/src/api/food.ts

@@ -0,0 +1,35 @@
+import { apiClient, withAuth } from "./client";
+import { API_ENDPOINTS } from "../config/api";
+
+export interface ScannedFoodProduct {
+  barcode: string;
+  name: string;
+  brand: string | null;
+  imageUrl: string | null;
+  servingSize: string;
+  caloriesPerServing: number;
+  macros: {
+    protein: number | null;
+    carbs: number | null;
+    fat: number | null;
+  };
+  source: "openfoodfacts";
+}
+
+interface FoodLookupResponse {
+  success: boolean;
+  data: ScannedFoodProduct;
+}
+
+export async function lookupFoodByBarcode(
+  barcode: string,
+  token: string | null,
+): Promise<ScannedFoodProduct> {
+  const normalized = barcode.replace(/\D/g, "");
+  const response = await apiClient.get<FoodLookupResponse>(
+    API_ENDPOINTS.FOOD.LOOKUP_BARCODE(normalized),
+    withAuth(token),
+  );
+
+  return response.data.data;
+}

apps/mobile/src/api/index.ts

@@ -15,4 +15,5 @@ export * from "./hydration";
 export * from "./client";
 export * from "./helpers";
 export * from "./membership";
+export * from "./food";
 export * from "./gyms";

apps/mobile/src/config/api.ts

@@ -47,6 +47,9 @@ export const API_ENDPOINTS = {
   MEMBERSHIP: {
     FEATURES: "/api/membership/features",
   },
+  FOOD: {
+    LOOKUP_BARCODE: (code: string) => `/api/food/barcode/${code}`,
+  },
   NUTRITION: {
     BASE: "/api/nutrition",
     MEALS: "/api/nutrition/meals",