refactor: Enhance JSON-LD structure in category and product generation functions for improved SEO and consistency across URLs

prerender/seo/category.cjs

@@ -7,41 +7,82 @@ const generateCategoryJsonLd = (category, products = [], baseUrl, config) => {
     return '';
   }
 
-  const categoryUrl = `${baseUrl}/Kategorie/${category.seoName}`;
+  const root = baseUrl.endsWith("/") ? baseUrl.slice(0, -1) : baseUrl;
+  const categoryUrl = `${root}/Kategorie/${category.seoName}`;
 
   // Calculate price valid date (current date + 3 months)
   const priceValidDate = new Date();
   priceValidDate.setMonth(priceValidDate.getMonth() + 3);
   const priceValidUntil = priceValidDate.toISOString().split("T")[0];
 
-  const jsonLd = {
+  const id = {
-    "@context": "https://schema.org/",
+    business: `${root}#business`,
+    website: `${root}#website`,
+    breadcrumb: `${categoryUrl}#breadcrumb`,
+    itemList: `${categoryUrl}#itemlist`,
+  };
+
+  const logoUrl =
+    config.images && config.images.logo
+      ? `${root}${config.images.logo}`
+      : undefined;
+
+  const businessNode = {
+    "@id": id.business,
+    "@type": ["GardenStore", "LocalBusiness", "Organization"],
+    name: config.brandName,
+    url: root,
+    ...(logoUrl && {
+      logo: { "@type": "ImageObject", url: logoUrl },
+      image: { "@type": "ImageObject", url: logoUrl },
+    }),
+  };
+
+  const websiteNode = {
+    "@id": id.website,
+    "@type": "WebSite",
+    name: config.siteName || config.brandName,
+    url: root,
+    publisher: { "@id": id.business },
+  };
+
+  const breadcrumbNode = {
+    "@id": id.breadcrumb,
+    "@type": "BreadcrumbList",
+    itemListElement: [
+      {
+        "@type": "ListItem",
+        position: 1,
+        name: "Home",
+        item: root,
+      },
+      {
+        "@type": "ListItem",
+        position: 2,
+        name: category.name,
+        item: categoryUrl,
+      },
+    ],
+  };
+
+  const collectionPageNode = {
+    "@id": categoryUrl,
     "@type": "CollectionPage",
     name: category.name,
     url: categoryUrl,
     description: `${category.name} - Entdecken Sie unsere Auswahl an hochwertigen Produkten`,
-    breadcrumb: {
+    isPartOf: { "@id": id.website },
-      "@type": "BreadcrumbList",
+    breadcrumb: { "@id": id.breadcrumb },
-      itemListElement: [
-        {
-          "@type": "ListItem",
-          position: 1,
-          name: "Home",
-          item: baseUrl,
-        },
-        {
-          "@type": "ListItem",
-          position: 2,
-          name: category.name,
-          item: categoryUrl,
-        },
-      ],
-    },
   };
 
+  const graph = [businessNode, websiteNode, breadcrumbNode, collectionPageNode];
+
   // Add product list if products are available
   if (products && products.length > 0) {
-    jsonLd.mainEntity = {
+    collectionPageNode.mainEntity = { "@id": id.itemList };
+
+    graph.push({
+      "@id": id.itemList,
       "@type": "ItemList",
       numberOfItems: products.length,
       itemListElement: products.slice(0, 20).map((product, index) => ({
@@ -50,13 +91,13 @@ const generateCategoryJsonLd = (category, products = [], baseUrl, config) => {
         item: {
           "@type": "Product",
           name: product.name,
-          url: `${baseUrl}/Artikel/${product.seoName}`,
+          url: `${root}/Artikel/${product.seoName}`,
           image:
             product.pictureList && product.pictureList.trim()
-              ? `${baseUrl}/assets/images/prod${product.pictureList
+              ? `${root}/assets/images/prod${product.pictureList
                   .split(",")[0]
                   .trim()}.avif`
-              : `${baseUrl}/assets/images/nopicture.jpg`,
+              : `${root}/assets/images/nopicture.jpg`,
           description: product.description
             ? product.description.replace(/<[^>]*>/g, "").substring(0, 200)
             : `${product.name} - Hochwertiges Growshop Produkt`,
@@ -67,22 +108,23 @@ const generateCategoryJsonLd = (category, products = [], baseUrl, config) => {
           },
           offers: {
             "@type": "Offer",
-            url: `${baseUrl}/Artikel/${product.seoName}`,
+            url: `${root}/Artikel/${product.seoName}`,
-            price: product.price && !isNaN(product.price) ? product.price.toString() : "0.00",
+            price:
+              product.price && !isNaN(product.price)
+                ? product.price.toString()
+                : "0.00",
             priceCurrency: config.currency,
             priceValidUntil: priceValidUntil,
             availability: product.available
               ? "https://schema.org/InStock"
               : "https://schema.org/OutOfStock",
-            seller: {
+            seller: { "@id": id.business },
-              "@type": "Organization",
-              name: config.brandName,
-            },
             itemCondition: "https://schema.org/NewCondition",
             hasMerchantReturnPolicy: {
               "@type": "MerchantReturnPolicy",
               applicableCountry: "DE",
-              returnPolicyCategory: "https://schema.org/MerchantReturnFiniteReturnWindow",
+              returnPolicyCategory:
+                "https://schema.org/MerchantReturnFiniteReturnWindow",
               merchantReturnDays: 14,
               returnMethod: "https://schema.org/ReturnByMail",
               returnFees: "https://schema.org/FreeReturn",
@@ -91,7 +133,7 @@ const generateCategoryJsonLd = (category, products = [], baseUrl, config) => {
               "@type": "OfferShippingDetails",
               shippingRate: {
                 "@type": "MonetaryAmount",
-                value: 5.90,
+                value: 5.9,
                 currency: "EUR",
               },
               shippingDestination: {
@@ -117,11 +159,16 @@ const generateCategoryJsonLd = (category, products = [], baseUrl, config) => {
           },
         },
       })),
-    };
+    });
   }
 
+  const categoryGraph = {
+    "@context": "https://schema.org",
+    "@graph": graph,
+  };
+
   return `<script type="application/ld+json">${JSON.stringify(
-    jsonLd
+    categoryGraph
   )}</script>`;
 };
 

prerender/seo/homepage.cjs

@@ -36,177 +36,198 @@ const generateHomepageJsonLd = (baseUrl, config, categories = []) => {
   const canonicalUrl = baseUrl.endsWith('/') ? baseUrl.slice(0, -1) : baseUrl;
   const logoUrl = `${canonicalUrl}${config.images.logo}`;
 
-  const websiteJsonLd = {
+  const id = {
-    "@context": "https://schema.org/",
+    business: `${canonicalUrl}#business`,
+    website: `${canonicalUrl}#website`,
+    faq: `${canonicalUrl}#faq`,
+    categoryList: `${canonicalUrl}#category-list`,
+    sitemapPage: `${canonicalUrl}/sitemap#webpage`,
+  };
+
+  const organizationNode = {
+    "@id": id.business,
+    "@type": ["GardenStore", "LocalBusiness", "Organization"],
+    name: config.brandName,
+    alternateName: config.siteName,
+    description: config.descriptions.de.long,
+    url: canonicalUrl,
+    logo: {
+      "@type": "ImageObject",
+      url: logoUrl,
+    },
+    image: {
+      "@type": "ImageObject",
+      url: logoUrl,
+    },
+    telephone: "015208491860",
+    email: "service@growheads.de",
+    address: {
+      "@type": "PostalAddress",
+      streetAddress: "Trachenberger Strasse 14",
+      addressLocality: "Dresden",
+      postalCode: "01129",
+      addressCountry: "DE",
+      addressRegion: "Sachsen",
+    },
+    geo: {
+      "@type": "GeoCoordinates",
+      latitude: "51.083675",
+      longitude: "13.727215",
+    },
+    openingHours: [
+      "Mo-Fr 10:00:00-20:00:00",
+      "Sa 11:00:00-19:00:00",
+    ],
+    paymentAccepted: "Cash, Credit Card, PayPal, Bank Transfer",
+    currenciesAccepted: "EUR",
+    priceRange: "€€",
+    areaServed: {
+      "@type": "Country",
+      name: "Germany",
+    },
+    contactPoint: [
+      {
+        "@type": "ContactPoint",
+        telephone: "015208491860",
+        contactType: "customer service",
+        availableLanguage: "German",
+        hoursAvailable: {
+          "@type": "OpeningHoursSpecification",
+          dayOfWeek: [
+            "Monday",
+            "Tuesday",
+            "Wednesday",
+            "Thursday",
+            "Friday",
+          ],
+          opens: "10:00:00",
+          closes: "20:00:00",
+        },
+      },
+      {
+        "@type": "ContactPoint",
+        email: "service@growheads.de",
+        contactType: "customer service",
+        availableLanguage: "German",
+      },
+    ],
+    sameAs: [],
+  };
+
+  const sitemapWebPageNode = {
+    "@id": id.sitemapPage,
+    "@type": "WebPage",
+    name: "Sitemap",
+    url: `${canonicalUrl}/sitemap`,
+    description: "Vollständige Sitemap mit allen Kategorien und Seiten",
+    isPartOf: { "@id": id.website },
+  };
+
+  const websiteNode = {
+    "@id": id.website,
     "@type": "WebSite",
     name: config.brandName,
     url: canonicalUrl,
     description: config.descriptions.de.long,
-    publisher: {
+    publisher: { "@id": id.business },
-      "@type": "Organization",
-      name: config.brandName,
-      url: canonicalUrl,
-      logo: {
-        "@type": "ImageObject",
-        url: logoUrl,
-      },
-    },
     potentialAction: {
       "@type": "SearchAction",
       target: `${canonicalUrl}/search?q={search_term_string}`,
-      query: "required name=search_term_string"
+      query: "required name=search_term_string",
     },
-    mainEntity: {
+    mainEntity: { "@id": id.sitemapPage },
-      "@type": "WebPage",
+    sameAs: [],
-      name: "Sitemap",
-      url: `${canonicalUrl}/sitemap`,
-      description: "Vollständige Sitemap mit allen Kategorien und Seiten",
-    },
-    sameAs: [
-      // Add your social media URLs here if available
-    ],
   };
 
-  // Organization/LocalBusiness Schema for rich results
+  const faqMainEntity = [
-  const organizationJsonLd = {
+    {
-    "@context": "https://schema.org",
+      "@type": "Question",
-    "@type": "LocalBusiness",
+      name: "Welche Zahlungsmethoden akzeptiert GrowHeads?",
-    "name": config.brandName,
+      acceptedAnswer: {
-    "alternateName": config.siteName,
+        "@type": "Answer",
-    "description": config.descriptions.de.long,
+        text: "Wir akzeptieren Kreditkarten, PayPal, Banküberweisung, Nachnahme und Barzahlung bei Abholung in unserem Laden in Dresden.",
-    "url": canonicalUrl,
-    "logo": logoUrl,
-    "image": logoUrl,
-    "telephone": "015208491860",
-    "email": "service@growheads.de",
-    "address": {
-      "@type": "PostalAddress",
-      "streetAddress": "Trachenberger Strasse 14",
-      "addressLocality": "Dresden",
-      "postalCode": "01129",
-      "addressCountry": "DE",
-      "addressRegion": "Sachsen"
-    },
-    "geo": {
-      "@type": "GeoCoordinates",
-      "latitude": "51.083675",
-      "longitude": "13.727215"
-    },
-    "openingHours": [
-      "Mo-Fr 10:00:00-20:00:00",
-      "Sa 11:00:00-19:00:00"
-    ],
-    "paymentAccepted": "Cash, Credit Card, PayPal, Bank Transfer",
-    "currenciesAccepted": "EUR",
-    "priceRange": "€€",
-    "areaServed": {
-      "@type": "Country",
-      "name": "Germany"
-    },
-    "contactPoint": [
-      {
-        "@type": "ContactPoint",
-        "telephone": "015208491860",
-        "contactType": "customer service",
-        "availableLanguage": "German",
-        "hoursAvailable": {
-          "@type": "OpeningHoursSpecification",
-          "dayOfWeek": ["Monday", "Tuesday", "Wednesday", "Thursday", "Friday"],
-          "opens": "10:00:00",
-          "closes": "20:00:00"
-        }
       },
-      {
+    },
-        "@type": "ContactPoint",
+    {
-        "email": "service@growheads.de",
+      "@type": "Question",
-        "contactType": "customer service",
+      name: "Liefert GrowHeads deutschlandweit?",
-        "availableLanguage": "German"
+      acceptedAnswer: {
-      }
+        "@type": "Answer",
-    ],
+        text: "Ja, wir liefern deutschlandweit. Zusätzlich haben wir einen Laden in Dresden (Trachenberger Strasse 14) für lokale Kunden.",
-    "sameAs": [
+      },
-      // Add social media URLs when available
+    },
-      // "https://www.facebook.com/growheads",
+    {
-      // "https://www.instagram.com/growheads"
+      "@type": "Question",
-         ]
+      name: "Welche Produkte bietet GrowHeads?",
-   };
+      acceptedAnswer: {
+        "@type": "Answer",
+        text: "Wir bieten ein komplettes Sortiment für den Indoor-Anbau: Beleuchtung, Belüftung, Dünger, Töpfe, Zelte, Messgeräte und vieles mehr für professionelle Zuchtanlagen.",
+      },
+    },
+    {
+      "@type": "Question",
+      name: "Hat GrowHeads einen physischen Laden?",
+      acceptedAnswer: {
+        "@type": "Answer",
+        text: "Ja, unser Laden befindet sich in Dresden, Trachenberger Strasse 14. Öffnungszeiten: Mo-Fr 10-20 Uhr, Sa 11-19 Uhr. Sie können auch online bestellen.",
+      },
+    },
+    {
+      "@type": "Question",
+      name: "Bietet GrowHeads Beratung zum Indoor-Anbau?",
+      acceptedAnswer: {
+        "@type": "Answer",
+        text: "Ja, unser erfahrenes Team berät Sie gerne zu allen Aspekten des Indoor-Anbaus. Kontaktieren Sie uns telefonisch unter 015208491860 oder besuchen Sie unseren Laden.",
+      },
+    },
+  ];
 
-  // FAQPage Schema for common questions
+  const faqNode = {
-  const faqJsonLd = {
+    "@id": id.faq,
-    "@context": "https://schema.org",
     "@type": "FAQPage",
-    "mainEntity": [
+    url: canonicalUrl,
-      {
+    publisher: { "@id": id.business },
-        "@type": "Question",
+    isPartOf: { "@id": id.website },
-        "name": "Welche Zahlungsmethoden akzeptiert GrowHeads?",
+    mainEntity: faqMainEntity,
-        "acceptedAnswer": {
-          "@type": "Answer",
-          "text": "Wir akzeptieren Kreditkarten, PayPal, Banküberweisung, Nachnahme und Barzahlung bei Abholung in unserem Laden in Dresden."
-        }
-      },
-      {
-        "@type": "Question", 
-        "name": "Liefert GrowHeads deutschlandweit?",
-        "acceptedAnswer": {
-          "@type": "Answer",
-          "text": "Ja, wir liefern deutschlandweit. Zusätzlich haben wir einen Laden in Dresden (Trachenberger Strasse 14) für lokale Kunden."
-        }
-      },
-      {
-        "@type": "Question",
-        "name": "Welche Produkte bietet GrowHeads?",
-        "acceptedAnswer": {
-          "@type": "Answer",
-          "text": "Wir bieten ein komplettes Sortiment für den Indoor-Anbau: Beleuchtung, Belüftung, Dünger, Töpfe, Zelte, Messgeräte und vieles mehr für professionelle Zuchtanlagen."
-        }
-      },
-      {
-        "@type": "Question",
-        "name": "Hat GrowHeads einen physischen Laden?",
-        "acceptedAnswer": {
-          "@type": "Answer",
-          "text": "Ja, unser Laden befindet sich in Dresden, Trachenberger Strasse 14. Öffnungszeiten: Mo-Fr 10-20 Uhr, Sa 11-19 Uhr. Sie können auch online bestellen."
-        }
-      },
-      {
-        "@type": "Question",
-        "name": "Bietet GrowHeads Beratung zum Indoor-Anbau?",
-        "acceptedAnswer": {
-          "@type": "Answer",
-          "text": "Ja, unser erfahrenes Team berät Sie gerne zu allen Aspekten des Indoor-Anbaus. Kontaktieren Sie uns telefonisch unter 015208491860 oder besuchen Sie unseren Laden."
-        }
-      }
-    ]
   };
 
-  // Generate ItemList for all categories (more appropriate for homepage)
+  const filteredCategories = categories.filter((c) => c.seoName);
-  const categoriesListJsonLd = {
+
-    "@context": "https://schema.org",
+  const graph = [
-    "@type": "ItemList",
+    organizationNode,
-    "name": "Produktkategorien",
+    websiteNode,
-    "description": "Alle verfügbaren Produktkategorien in unserem Online-Shop",
+    sitemapWebPageNode,
-    "numberOfItems": categories.filter(category => category.seoName).length,
+    faqNode,
-    "itemListElement": categories
+  ];
-      .filter(category => category.seoName) // Only include categories with seoName
+
-      .map((category, index) => ({
+  if (filteredCategories.length > 0) {
+    graph.push({
+      "@id": id.categoryList,
+      "@type": "ItemList",
+      name: "Produktkategorien",
+      description: "Alle verfügbaren Produktkategorien in unserem Online-Shop",
+      numberOfItems: filteredCategories.length,
+      isPartOf: { "@id": id.website },
+      itemListElement: filteredCategories.map((category, index) => ({
         "@type": "ListItem",
-        "position": index + 1,
+        position: index + 1,
-        "item": {
+        item: {
           "@type": "Thing",
-          "name": category.name,
+          name: category.name,
-          "url": `${canonicalUrl}/Kategorie/${category.seoName}`
+          url: `${canonicalUrl}/Kategorie/${category.seoName}`,
-        }
+        },
-      }))
+      })),
+    });
+  }
+
+  const homepageGraph = {
+    "@context": "https://schema.org",
+    "@graph": graph,
   };
 
-  // Return all JSON-LD scripts
+  return `<script type="application/ld+json">${JSON.stringify(
-  const websiteScript = `<script type="application/ld+json">${JSON.stringify(websiteJsonLd)}</script>`;
+    homepageGraph
-  const organizationScript = `<script type="application/ld+json">${JSON.stringify(organizationJsonLd)}</script>`;
+  )}</script>`;
-  const faqScript = `<script type="application/ld+json">${JSON.stringify(faqJsonLd)}</script>`;
-  const categoriesScript = categories.length > 0 
-    ? `<script type="application/ld+json">${JSON.stringify(categoriesListJsonLd)}</script>`
-    : '';
-
-  return websiteScript + '\n' + organizationScript + '\n' + faqScript + (categoriesScript ? '\n' + categoriesScript : '');
 };
 
 module.exports = {

prerender/seo/product.cjs

@@ -68,14 +68,15 @@ const generateProductMetaTags = (product, baseUrl, config) => {
 };
 
 const generateProductJsonLd = (product, baseUrl, config, categoryInfo = null) => {
-  const productUrl = `${baseUrl}/Artikel/${product.seoName}`;
+  const root = baseUrl.endsWith("/") ? baseUrl.slice(0, -1) : baseUrl;
+  const productUrl = `${root}/Artikel/${product.seoName}`;
   const pictureFirstId =
     product.pictureList && product.pictureList.trim()
       ? product.pictureList.split(",")[0].trim()
       : null;
   const imageUrl = pictureFirstId
-    ? `${baseUrl}/assets/images/prod${pictureFirstId}.avif`
+    ? `${root}/assets/images/prod${pictureFirstId}.avif`
-    : `${baseUrl}/assets/images/nopicture.jpg`;
+    : `${root}/assets/images/nopicture.jpg`;
 
   // Clean description for JSON-LD (remove HTML tags)
   const cleanDescription = product.description
@@ -86,8 +87,87 @@ const generateProductJsonLd = (product, baseUrl, config, categoryInfo = null) =>
   const priceValidDate = new Date();
   priceValidDate.setMonth(priceValidDate.getMonth() + 3);
 
-  const productJsonLd = {
+  const id = {
-    "@context": "https://schema.org/",
+    business: `${root}#business`,
+    website: `${root}#website`,
+    product: `${productUrl}#product`,
+    breadcrumb: `${productUrl}#breadcrumb`,
+  };
+
+  const logoUrl =
+    config.images && config.images.logo
+      ? `${root}${config.images.logo}`
+      : undefined;
+
+  const businessNode = {
+    "@id": id.business,
+    "@type": ["GardenStore", "LocalBusiness", "Organization"],
+    name: config.brandName,
+    url: root,
+    ...(logoUrl && {
+      logo: { "@type": "ImageObject", url: logoUrl },
+      image: { "@type": "ImageObject", url: logoUrl },
+    }),
+  };
+
+  const websiteNode = {
+    "@id": id.website,
+    "@type": "WebSite",
+    name: config.siteName || config.brandName,
+    url: root,
+    publisher: { "@id": id.business },
+  };
+
+  const offer = {
+    "@type": "Offer",
+    url: productUrl,
+    priceCurrency: config.currency,
+    price: product.price.toString(),
+    priceValidUntil: priceValidDate.toISOString().split("T")[0],
+    itemCondition: "https://schema.org/NewCondition",
+    availability: product.available
+      ? "https://schema.org/InStock"
+      : "https://schema.org/OutOfStock",
+    seller: { "@id": id.business },
+    hasMerchantReturnPolicy: {
+      "@type": "MerchantReturnPolicy",
+      applicableCountry: "DE",
+      returnPolicyCategory: "https://schema.org/MerchantReturnFiniteReturnWindow",
+      merchantReturnDays: 14,
+      returnMethod: "https://schema.org/ReturnByMail",
+      returnFees: "https://schema.org/FreeReturn",
+    },
+    shippingDetails: {
+      "@type": "OfferShippingDetails",
+      shippingRate: {
+        "@type": "MonetaryAmount",
+        value: 5.9,
+        currency: "EUR",
+      },
+      shippingDestination: {
+        "@type": "DefinedRegion",
+        addressCountry: "DE",
+      },
+      deliveryTime: {
+        "@type": "ShippingDeliveryTime",
+        handlingTime: {
+          "@type": "QuantitativeValue",
+          minValue: 0,
+          maxValue: 1,
+          unitCode: "DAY",
+        },
+        transitTime: {
+          "@type": "QuantitativeValue",
+          minValue: 2,
+          maxValue: 3,
+          unitCode: "DAY",
+        },
+      },
+    },
+  };
+
+  const productNode = {
+    "@id": id.product,
     "@type": "Product",
     name: product.name,
     image: [imageUrl],
@@ -98,95 +178,65 @@ const generateProductJsonLd = (product, baseUrl, config, categoryInfo = null) =>
       "@type": "Brand",
       name: product.manufacturer || "Unknown",
     },
-    offers: {
+    offers: offer,
-      "@type": "Offer",
-      url: productUrl,
-      priceCurrency: config.currency,
-      price: product.price.toString(),
-      priceValidUntil: priceValidDate.toISOString().split("T")[0],
-      itemCondition: "https://schema.org/NewCondition",
-      availability: product.available
-        ? "https://schema.org/InStock"
-        : "https://schema.org/OutOfStock",
-      seller: {
-        "@type": "Organization",
-        name: config.brandName,
-      },
-      hasMerchantReturnPolicy: {
-        "@type": "MerchantReturnPolicy",
-        applicableCountry: "DE",
-        returnPolicyCategory: "https://schema.org/MerchantReturnFiniteReturnWindow",
-        merchantReturnDays: 14,
-        returnMethod: "https://schema.org/ReturnByMail",
-        returnFees: "https://schema.org/FreeReturn",
-      },
-      shippingDetails: {
-        "@type": "OfferShippingDetails",
-        shippingRate: {
-          "@type": "MonetaryAmount",
-          value: 5.90,
-          currency: "EUR",
-        },
-        shippingDestination: {
-          "@type": "DefinedRegion",
-          addressCountry: "DE",
-        },
-        deliveryTime: {
-          "@type": "ShippingDeliveryTime",
-          handlingTime: {
-            "@type": "QuantitativeValue",
-            minValue: 0,
-            maxValue: 1,
-            unitCode: "DAY",
-          },
-          transitTime: {
-            "@type": "QuantitativeValue",
-            minValue: 2,
-            maxValue: 3,
-            unitCode: "DAY",
-          },
-        },
-      },
-    },
   };
 
-  const productScript = `<script type="application/ld+json">${JSON.stringify(
+  const hasBreadcrumb =
-    productJsonLd
+    categoryInfo && categoryInfo.name && categoryInfo.seoName;
+
+  const breadcrumbList = hasBreadcrumb
+    ? {
+        "@id": id.breadcrumb,
+        "@type": "BreadcrumbList",
+        itemListElement: [
+          {
+            "@type": "ListItem",
+            position: 1,
+            name: "Home",
+            item: root,
+          },
+          {
+            "@type": "ListItem",
+            position: 2,
+            name: categoryInfo.name,
+            item: `${root}/Kategorie/${categoryInfo.seoName}`,
+          },
+          {
+            "@type": "ListItem",
+            position: 3,
+            name: product.name,
+            item: productUrl,
+          },
+        ],
+      }
+    : null;
+
+  const itemPageNode = {
+    "@id": productUrl,
+    "@type": "ItemPage",
+    url: productUrl,
+    name: product.name,
+    isPartOf: { "@id": id.website },
+    mainEntity: { "@id": id.product },
+    ...(hasBreadcrumb && { breadcrumb: { "@id": id.breadcrumb } }),
+  };
+
+  const graph = [
+    businessNode,
+    websiteNode,
+    itemPageNode,
+    ...(breadcrumbList ? [breadcrumbList] : []),
+    productNode,
+  ];
+
+  const productGraph = {
+    "@context": "https://schema.org",
+    "@graph": graph,
+  };
+
+  return `<script type="application/ld+json">${JSON.stringify(
+    productGraph
   )}</script>`;
-
-  // BreadcrumbList is not a valid property on Product; emit as its own JSON-LD block (WebPage path context).
-  if (categoryInfo && categoryInfo.name && categoryInfo.seoName) {
-    const breadcrumbJsonLd = {
-      "@context": "https://schema.org/",
-      "@type": "BreadcrumbList",
-      itemListElement: [
-        {
-          "@type": "ListItem",
-          position: 1,
-          name: "Home",
-          item: baseUrl,
-        },
-        {
-          "@type": "ListItem",
-          position: 2,
-          name: categoryInfo.name,
-          item: `${baseUrl}/Kategorie/${categoryInfo.seoName}`,
-        },
-        {
-          "@type": "ListItem",
-          position: 3,
-          name: product.name,
-          item: productUrl,
-        },
-      ],
-    };
-    const breadcrumbScript = `<script type="application/ld+json">${JSON.stringify(
-      breadcrumbJsonLd
-    )}</script>`;
-    return `${productScript}\n${breadcrumbScript}`;
-  }
-
-  return productScript;
 };
 
 module.exports = {