hook fix

src/services/productService.js

@@ -0,0 +1,20 @@
+import { getProduct } from "../graphql/product.query";
+import { useSharedState } from "../store/useSharedState";
+
+export async function getProductOnce(id) {
+  if (import.meta.env.MODE === "development") return false;
+  try {
+    const { products, addProduct } = useSharedState.getState();
+
+    if (products[id]) return true;
+
+    const product = await getProduct(id);
+    if (!product) throw new Error("Nie znaleziono produktu");
+
+    addProduct(product);
+
+    return true;
+  } catch (err) {
+    console.error(err);
+  }
+}