Function isItemListing

Example

// Valid item listing
const validItem = {
  title: "Sodium Chloride",
  price: "29.99",
  link: "/products/nacl",
  product_id: "12345",
  product_code: "CHEM-001",
  quantity: "500g",
  vendor: "Chemical Supplier",
  original_product_id: "12345",
  list_price: "39.99",
  shopify_variants: [
    {
      sku: "CHEM-001-500G",
      price: "29.99",
      link: "/products/nacl?variant=1",
      variant_id: "1",
      quantity_total: "100",
      options: { Model: "500g" }
    },
    {
      sku: "CHEM-001-1KG",
      price: "49.99",
      link: "/products/nacl?variant=2",
      variant_id: "2",
      quantity_total: "50",
      options: { Model: "1kg" }
    }
  ]
};

if (isItemListing(validItem)) {
  console.log("Valid item listing:", validItem.title);
  console.log("Number of variants:", validItem.shopify_variants.length);
  console.log("Vendor:", validItem.vendor);
}

// Valid item with numeric price
const numericPriceItem = {
  title: "Potassium Chloride",
  price: 39.99, // Can be number or string
  link: "/products/kcl",
  product_id: "12346",
  product_code: "CHEM-002",
  quantity: "1kg",
  vendor: "Chemical Supplier",
  original_product_id: "12346",
  list_price: "49.99",
  shopify_variants: [
    {
      sku: "CHEM-002-1KG",
      price: "39.99",
      link: "/products/kcl?variant=1",
      variant_id: "1",
      quantity_total: "50",
      options: { Model: "1kg" }
    }
  ]
};

if (isItemListing(numericPriceItem)) {
  console.log("Valid item with numeric price");
}

// Invalid item (missing required properties)
const invalidItem = {
  title: "Sodium Chloride",
  price: "29.99",
  link: "/products/nacl"
  // Missing other required properties
};
if (!isItemListing(invalidItem)) {
  console.error("Invalid item - missing required properties");
}

// Invalid item (wrong types)
const wrongTypes = {
  title: 12345, // Should be string
  price: true, // Should be string or number
  link: 123, // Should be string
  product_id: 12345, // Should be string
  product_code: 123, // Should be string
  quantity: 500, // Should be string
  vendor: 123, // Should be string
  original_product_id: 12345, // Should be string
  list_price: 39.99, // Should be string
  shopify_variants: "not an array" // Should be array
};
if (!isItemListing(wrongTypes)) {
  console.error("Invalid item - wrong property types");
}

// Invalid item (invalid variants)
const invalidVariants = {
  title: "Sodium Chloride",
  price: "29.99",
  link: "/products/nacl",
  product_id: "12345",
  product_code: "CHEM-001",
  quantity: "500g",
  vendor: "Chemical Supplier",
  original_product_id: "12345",
  list_price: "39.99",
  shopify_variants: [
    {
      sku: "CHEM-001-500G",
      price: "29.99"
      // Missing required variant properties
    }
  ]
};
if (!isItemListing(invalidVariants)) {
  console.error("Invalid item - contains invalid variants");
}
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