first commit

src/lib/cards.ts

@@ -0,0 +1,52 @@
+import { discountPercent } from "./format";
+import { productHref } from "./slug";
+import { DEMO_PRICING, demoPrice } from "./demoPricing";
+import type { ApiProduct, ProductCardData, StoreSpecial } from "./types";
+
+export function productToCard(product: ApiProduct): ProductCardData {
+  const base = {
+    id: product.id,
+    href: productHref(product.id, product.nameFa, product.title),
+    title: product.nameFa || product.title,
+    image: product.thumbnailUrl || product.image || product.thumbnail,
+  };
+
+  if (product.store.minPrice !== null) {
+    return { ...base, price: product.store.minPrice, oldPrice: null, percent: 0, inStock: product.store.inStock };
+  }
+
+  if (DEMO_PRICING) {
+    const { price, oldPrice } = demoPrice(product);
+    return {
+      ...base,
+      price,
+      oldPrice,
+      percent: oldPrice ? discountPercent(price, oldPrice) : 0,
+      inStock: true,
+    };
+  }
+
+  return { ...base, price: null, oldPrice: null, percent: 0, inStock: false };
+}
+
+// A curated store-special group carries its own variant pricing, so the
+// discount shown there is the real one rather than a product-level guess.
+export function specialToCards(special: StoreSpecial): ProductCardData[] {
+  return special.items
+    .filter((item) => item.isActive)
+    .map((item) => {
+      const variant = item.variants.find((v) => v.discountedPrice !== null) ?? item.variants[0];
+      const price = variant?.discountedPrice ?? variant?.price ?? null;
+      const oldPrice = variant?.discountedPrice !== null ? variant?.price ?? null : null;
+      return {
+        id: item.id,
+        href: productHref(item.productId, item.productNameFa, item.productTitle),
+        title: item.productNameFa || item.productTitle,
+        image: item.productImage,
+        price,
+        oldPrice,
+        percent: price !== null && oldPrice !== null ? discountPercent(price, oldPrice) : 0,
+        inStock: (variant?.stockQuantity ?? 0) > 0,
+      };
+    });
+}