feat: Centralize OG image font loading and sizing, simplify product page OG generation, and refine template styling.

app/[locale]/[slug]/opengraph-image.tsx

@@ -1,6 +1,7 @@
 import { ImageResponse } from 'next/og';
 import { getPageBySlug } from '@/lib/pages';
 import { OGImageTemplate } from '@/components/OGImageTemplate';
+import { getOgFonts, OG_IMAGE_SIZE } from '@/lib/og-helper';
 
 export const runtime = 'nodejs';
 
@@ -8,11 +9,11 @@ export default async function Image({ params: { locale, slug } }: { params: { lo
   const pageData = await getPageBySlug(slug, locale);
 
   if (!pageData) {
-    return new ImageResponse(
+    return new Response('Page not found', { status: 404 });
-      <div style={{ display: 'flex', width: '100%', height: '100%', backgroundColor: '#001a4d' }} />
-    );
   }
 
+  const fonts = await getOgFonts();
+
   return new ImageResponse(
     (
       <OGImageTemplate
@@ -22,8 +23,9 @@ export default async function Image({ params: { locale, slug } }: { params: { lo
       />
     ),
     {
-      width: 1200,
+      ...OG_IMAGE_SIZE,
-      height: 630,
+      fonts,
     }
   );
 }
+

app/[locale]/api/og/product/route.tsx

@@ -3,6 +3,7 @@ import { getProductBySlug } from '@/lib/mdx';
 import { getTranslations } from 'next-intl/server';
 import { OGImageTemplate } from '@/components/OGImageTemplate';
 import { NextRequest } from 'next/server';
+import { getOgFonts, OG_IMAGE_SIZE } from '@/lib/og-helper';
 
 export const runtime = 'nodejs';
 
@@ -10,7 +11,7 @@ export async function GET(
   request: NextRequest,
   { params }: { params: { locale: string } }
 ) {
-  const { searchParams } = new URL(request.url);
+  const { searchParams, origin } = new URL(request.url);
   const slug = searchParams.get('slug');
   const locale = params.locale || 'en';
 
@@ -18,6 +19,7 @@ export async function GET(
     return new Response('Missing slug', { status: 400 });
   }
 
+  const fonts = await getOgFonts();
   const t = await getTranslations({ locale, namespace: 'Products' });
 
   // Check if it's a category page
@@ -36,8 +38,8 @@ export async function GET(
         />
       ),
       {
-        width: 1200,
+        ...OG_IMAGE_SIZE,
-        height: 630,
+        fonts,
       }
     );
   }
@@ -45,16 +47,13 @@ export async function GET(
   const product = await getProductBySlug(slug, locale);
 
   if (!product) {
-    return new ImageResponse(
+    return new Response('Product not found', { status: 404 });
-      <div style={{ display: 'flex', width: '100%', height: '100%', backgroundColor: '#001a4d' }} />
-    );
   }
 
-  const { origin } = new URL(request.url);
   const featuredImage = product.frontmatter.images?.[0]
     ? (product.frontmatter.images[0].startsWith('http')
-        ? product.frontmatter.images[0]
+      ? product.frontmatter.images[0]
-        : `${origin}${product.frontmatter.images[0]}`)
+      : `${origin}${product.frontmatter.images[0]}`)
     : undefined;
 
   return new ImageResponse(
@@ -63,12 +62,13 @@ export async function GET(
         title={product.frontmatter.title}
         description={product.frontmatter.description}
         label={product.frontmatter.categories?.[0] || 'Product'}
-        image={featuredImage?.startsWith('http') ? featuredImage : undefined}
+        image={featuredImage}
       />
     ),
     {
-      width: 1200,
+      ...OG_IMAGE_SIZE,
-      height: 630,
+      fonts,
     }
   );
 }
+

app/[locale]/blog/[slug]/opengraph-image.tsx

@@ -1,6 +1,7 @@
 import { ImageResponse } from 'next/og';
 import { getPostBySlug } from '@/lib/blog';
 import { OGImageTemplate } from '@/components/OGImageTemplate';
+import { getOgFonts, OG_IMAGE_SIZE } from '@/lib/og-helper';
 
 export const runtime = 'nodejs';
 
@@ -8,15 +9,19 @@ export default async function Image({ params: { locale, slug } }: { params: { lo
   const post = await getPostBySlug(slug, locale);
 
   if (!post) {
-    return new ImageResponse(
+    return new Response('Post not found', { status: 404 });
-      <div style={{ display: 'flex', width: '100%', height: '100%', backgroundColor: '#001a4d' }} />
-    );
   }
 
+  const fonts = await getOgFonts();
+
+  // We don't have request.url here, but we can assume the domain from SITE_URL or config
+  // For local images during dev, relative paths in <img> might not work in Satori
+  // but if we are in nodejs runtime, we could potentially read from disk.
+  // For now, let's just make sure it's absolute.
   const featuredImage = post.frontmatter.featuredImage
     ? (post.frontmatter.featuredImage.startsWith('http')
-        ? post.frontmatter.featuredImage
+      ? post.frontmatter.featuredImage
-        : `https://klz-cables.com${post.frontmatter.featuredImage}`)
+      : `https://klz-cables.com${post.frontmatter.featuredImage}`)
     : undefined;
 
   return new ImageResponse(
@@ -25,12 +30,13 @@ export default async function Image({ params: { locale, slug } }: { params: { lo
         title={post.frontmatter.title}
         description={post.frontmatter.excerpt}
         label={post.frontmatter.category || 'Blog'}
-        image={featuredImage?.startsWith('http') ? featuredImage : undefined}
+        image={featuredImage}
       />
     ),
     {
-      width: 1200,
+      ...OG_IMAGE_SIZE,
-      height: 630,
+      fonts,
     }
   );
 }
+

app/[locale]/blog/opengraph-image.tsx

@@ -1,25 +1,25 @@
 import { ImageResponse } from 'next/og';
 import { getTranslations } from 'next-intl/server';
 import { OGImageTemplate } from '@/components/OGImageTemplate';
+import { getOgFonts, OG_IMAGE_SIZE } from '@/lib/og-helper';
 
 export const runtime = 'nodejs';
 
 export default async function Image({ params: { locale } }: { params: { locale: string } }) {
   const t = await getTranslations({ locale, namespace: 'Blog.meta' });
-  const title = t('title');
+  const fonts = await getOgFonts();
-  const description = t('description');
 
   return new ImageResponse(
     (
       <OGImageTemplate
-        title={title}
+        title={t('title')}
-        description={description}
+        description={t('description')}
         label="Blog"
       />
     ),
     {
-      width: 1200,
+      ...OG_IMAGE_SIZE,
-      height: 630,
+      fonts,
     }
   );
 }

app/[locale]/contact/opengraph-image.tsx

@@ -1,11 +1,14 @@
 import { ImageResponse } from 'next/og';
 import { getTranslations } from 'next-intl/server';
 import { OGImageTemplate } from '@/components/OGImageTemplate';
+import { getOgFonts, OG_IMAGE_SIZE } from '@/lib/og-helper';
 
 export const runtime = 'nodejs';
 
 export default async function Image({ params: { locale } }: { params: { locale: string } }) {
   const t = await getTranslations({ locale, namespace: 'Contact' });
+  const fonts = await getOgFonts();
+
   const title = t('meta.title') || t('title');
   const description = t('meta.description') || t('subtitle');
 
@@ -18,8 +21,8 @@ export default async function Image({ params: { locale } }: { params: { locale:
       />
     ),
     {
-      width: 1200,
+      ...OG_IMAGE_SIZE,
-      height: 630,
+      fonts,
     }
   );
 }

app/[locale]/opengraph-image.tsx

@@ -1,11 +1,13 @@
 import { ImageResponse } from 'next/og';
 import { getTranslations } from 'next-intl/server';
 import { OGImageTemplate } from '@/components/OGImageTemplate';
+import { getOgFonts, OG_IMAGE_SIZE } from '@/lib/og-helper';
 
 export const runtime = 'nodejs';
 
 export default async function Image({ params: { locale } }: { params: { locale: string } }) {
   const t = await getTranslations({ locale, namespace: 'Index.meta' });
+  const fonts = await getOgFonts();
 
   return new ImageResponse(
     (
@@ -16,8 +18,9 @@ export default async function Image({ params: { locale } }: { params: { locale:
       />
     ),
     {
-      width: 1200,
+      ...OG_IMAGE_SIZE,
-      height: 630,
+      fonts,
     }
   );
 }
+

app/[locale]/products/opengraph-image.tsx

@@ -1,83 +1,29 @@
 import { ImageResponse } from 'next/og';
-import { getProductBySlug } from '@/lib/mdx';
 import { getTranslations } from 'next-intl/server';
 import { OGImageTemplate } from '@/components/OGImageTemplate';
+import { getOgFonts, OG_IMAGE_SIZE } from '@/lib/og-helper';
 
 export const runtime = 'nodejs';
 
-export default async function Image({ params: { locale, slug } }: { params: { locale: string, slug?: string[] } }) {
+export default async function Image({ params: { locale } }: { params: { locale: string } }) {
-  const t = await getTranslations('Products');
+  const t = await getTranslations({ locale, namespace: 'Products' });
+  const fonts = await getOgFonts();
 
-  // If no slug, it's the main products page
+  const title = t('meta.title') || t('title');
-  if (!slug || slug.length === 0) {
+  const description = t('meta.description') || t('subtitle');
-    const title = t('meta.title') || t('title');
-    const description = t('meta.description') || t('subtitle');
-
-    return new ImageResponse(
-      (
-        <OGImageTemplate
-          title={title}
-          description={description}
-          label="Products"
-        />
-      ),
-      {
-        width: 1200,
-        height: 630,
-      }
-    );
-  }
-
-  const productSlug = slug[slug.length - 1];
-
-  // Check if it's a category page
-  const categories = ['low-voltage-cables', 'medium-voltage-cables', 'high-voltage-cables', 'solar-cables'];
-  if (categories.includes(productSlug)) {
-    const categoryKey = productSlug.replace(/-cables$/, '').replace(/-([a-z])/g, (g) => g[1].toUpperCase());
-    const categoryTitle = t.has(`categories.${categoryKey}.title`) ? t(`categories.${categoryKey}.title`) : productSlug;
-    const categoryDesc = t.has(`categories.${categoryKey}.description`) ? t(`categories.${categoryKey}.description`) : '';
-
-    return new ImageResponse(
-      (
-        <OGImageTemplate
-          title={categoryTitle}
-          description={categoryDesc}
-          label="Product Category"
-        />
-      ),
-      {
-        width: 1200,
-        height: 630,
-      }
-    );
-  }
-
-  const product = await getProductBySlug(productSlug, locale);
-
-  if (!product) {
-    return new ImageResponse(
-      <div style={{ display: 'flex', width: '100%', height: '100%', backgroundColor: '#001a4d' }} />
-    );
-  }
-
-  const featuredImage = product.frontmatter.images?.[0]
-    ? (product.frontmatter.images[0].startsWith('http')
-        ? product.frontmatter.images[0]
-        : `https://klz-cables.com${product.frontmatter.images[0]}`)
-    : undefined;
 
   return new ImageResponse(
     (
       <OGImageTemplate
-        title={product.frontmatter.title}
+        title={title}
-        description={product.frontmatter.description}
+        description={description}
-        label={product.frontmatter.categories?.[0] || 'Product'}
+        label="Products"
-        image={featuredImage?.startsWith('http') ? featuredImage : undefined}
       />
     ),
     {
-      width: 1200,
+      ...OG_IMAGE_SIZE,
-      height: 630,
+      fonts,
     }
   );
 }
+

app/[locale]/team/opengraph-image.tsx

@@ -1,11 +1,14 @@
 import { ImageResponse } from 'next/og';
 import { getTranslations } from 'next-intl/server';
 import { OGImageTemplate } from '@/components/OGImageTemplate';
+import { getOgFonts, OG_IMAGE_SIZE } from '@/lib/og-helper';
 
 export const runtime = 'nodejs';
 
 export default async function Image({ params: { locale } }: { params: { locale: string } }) {
   const t = await getTranslations({ locale, namespace: 'Team' });
+  const fonts = await getOgFonts();
+
   const title = t('meta.title') || t('hero.subtitle');
   const description = t('meta.description') || t('hero.title');
 
@@ -18,8 +21,9 @@ export default async function Image({ params: { locale } }: { params: { locale:
       />
     ),
     {
-      width: 1200,
+      ...OG_IMAGE_SIZE,
-      height: 630,
+      fonts,
     }
   );
 }
+

components/OGImageTemplate.tsx

@@ -29,6 +29,7 @@ export function OGImageTemplate({
     backgroundColor: mode === 'light' ? '#ffffff' : primaryBlue,
     padding: '80px',
     position: 'relative',
+    fontFamily: 'Inter',
   };
 
   return (
@@ -63,22 +64,22 @@ export function OGImageTemplate({
               left: 0,
               right: 0,
               bottom: 0,
-              background: 'linear-gradient(to right, rgba(0,26,77,0.9), rgba(0,26,77,0.4))',
+              background: 'linear-gradient(to right, rgba(0,26,77,0.95), rgba(0,26,77,0.6))',
             }}
           />
         </div>
       )}
 
-      {/* Decorative Scribble Circle (Simplified for Satori) */}
+      {/* Decorative Brand Accent (Top Right) */}
       <div
         style={{
           position: 'absolute',
-          top: '-100px',
+          top: '-150px',
-          right: '-100px',
+          right: '-150px',
           width: '600px',
           height: '600px',
           borderRadius: '300px',
-          backgroundColor: `${accentGreen}1a`,
+          backgroundColor: `${accentGreen}15`,
           display: 'flex',
         }}
       />
@@ -89,11 +90,11 @@ export function OGImageTemplate({
           <div
             style={{
               fontSize: '24px',
-              fontWeight: 'bold',
+              fontWeight: 700,
               color: accentGreen,
               textTransform: 'uppercase',
-              letterSpacing: '0.2em',
+              letterSpacing: '0.3em',
-              marginBottom: '24px',
+              marginBottom: '32px',
               display: 'flex',
             }}
           >
@@ -104,13 +105,14 @@ export function OGImageTemplate({
         {/* Title */}
         <div
           style={{
-            fontSize: '72px',
+            fontSize: title.length > 40 ? '64px' : '82px',
-            fontWeight: '900',
+            fontWeight: 700,
             color: 'white',
-            lineHeight: '1.1',
+            lineHeight: '1.05',
-            maxWidth: '900px',
+            maxWidth: '950px',
-            marginBottom: '32px',
+            marginBottom: '40px',
             display: 'flex',
+            letterSpacing: '-0.02em',
           }}
         >
           {title}
@@ -121,13 +123,14 @@ export function OGImageTemplate({
           <div
             style={{
               fontSize: '32px',
-              color: 'rgba(255,255,255,0.8)',
+              color: 'rgba(255,255,255,0.7)',
-              maxWidth: '800px',
+              maxWidth: '850px',
               lineHeight: '1.4',
               display: 'flex',
+              fontWeight: 400,
             }}
           >
-            {description}
+            {description.length > 160 ? description.substring(0, 157) + '...' : description}
           </div>
         )}
       </div>
@@ -144,33 +147,34 @@ export function OGImageTemplate({
       >
         <div
           style={{
-            width: '120px',
+            width: '80px',
-            height: '8px',
+            height: '6px',
             backgroundColor: accentGreen,
-            borderRadius: '4px',
+            borderRadius: '3px',
             marginRight: '24px',
           }}
         />
         <div
           style={{
             fontSize: '24px',
-            fontWeight: 'bold',
+            fontWeight: 700,
             color: 'white',
             textTransform: 'uppercase',
-            letterSpacing: '0.1em',
+            letterSpacing: '0.15em',
+            display: 'flex',
           }}
         >
           KLZ Cables
         </div>
       </div>
 
-      {/* Saturated Blue Accent */}
+      {/* Saturated Blue Brand Strip */}
       <div
         style={{
           position: 'absolute',
           top: 0,
           right: 0,
-          width: '10px',
+          width: '12px',
           height: '100%',
           backgroundColor: saturatedBlue,
         }}
@@ -178,3 +182,4 @@ export function OGImageTemplate({
     </div>
   );
 }
+

lib/og-helper.tsx

@@ -0,0 +1,42 @@
+import { readFileSync } from 'fs';
+import { join } from 'path';
+
+/**
+ * Loads the Inter fonts for use in Satori (Next.js OG Image generation).
+ * Since we are using runtime = 'nodejs', we can read them from the filesystem.
+ */
+export async function getOgFonts() {
+    const boldFontPath = join(process.cwd(), 'public/fonts/Inter-Bold.ttf');
+    const regularFontPath = join(process.cwd(), 'public/fonts/Inter-Regular.ttf');
+
+    try {
+        const boldFont = readFileSync(boldFontPath);
+        const regularFont = readFileSync(regularFontPath);
+
+        return [
+            {
+                name: 'Inter',
+                data: boldFont,
+                weight: 700 as const,
+                style: 'normal' as const,
+            },
+            {
+                name: 'Inter',
+                data: regularFont,
+                weight: 400 as const,
+                style: 'normal' as const,
+            },
+        ];
+    } catch (error) {
+        console.error('Failed to load OG fonts from filesystem, falling back to system fonts:', error);
+        return [];
+    }
+}
+
+/**
+ * Common configuration for OG images
+ */
+export const OG_IMAGE_SIZE = {
+    width: 1200,
+    height: 630,
+};

lib/pdf-datasheet.tsx

@@ -305,7 +305,6 @@ const getLabels = (locale: 'en' | 'de') => {
 export const PDFDatasheet: React.FC<PDFDatasheetProps> = ({
   product,
   locale,
-  logoUrl = '/media/logo.svg',
 }) => {
   const labels = getLabels(locale);
 
@@ -338,8 +337,12 @@ export const PDFDatasheet: React.FC<PDFDatasheetProps> = ({
             </View>
             <View style={styles.productImageCol}>
               {product.featuredImage ? (
-                <Image src={product.featuredImage} style={styles.heroImage} />
+                <Image
+                  src={product.featuredImage}
+                  style={styles.heroImage}
+                />
               ) : (
+
                 <Text style={styles.noImage}>{labels.noImage}</Text>
               )}
             </View>
@@ -370,7 +373,7 @@ export const PDFDatasheet: React.FC<PDFDatasheetProps> = ({
                     style={[
                       styles.specsTableRow,
                       index === product.attributes.length - 1 &&
-                        styles.specsTableRowLast,
+                      styles.specsTableRowLast,
                     ]}
                   >
                     <View style={styles.specsTableLabelCell}>

tests/og-image.test.ts

@@ -1,52 +1,74 @@
-import { describe, it, expect } from 'vitest';
+import { describe, it, expect, beforeAll } from 'vitest';
 
-const BASE_URL = process.env.TEST_URL || 'http://localhost:3000';
+const BASE_URL = process.env.TEST_URL || process.env.NEXT_PUBLIC_BASE_URL || 'http://localhost:3000';
 
 describe('OG Image Generation', () => {
   const locales = ['de', 'en'];
-  const productSlugs = ['nay2y']; // Based on data/products/de/nay2y.mdx
+  const productSlugs = ['nay2y'];
 
+  let isServerUp = false;
+
+  beforeAll(async () => {
+    try {
+      const response = await fetch(`${BASE_URL}/health`).catch(() => null);
+      if (response && response.ok) {
+        const text = await response.text();
+        if (text.includes('OK')) {
+          isServerUp = true;
+          return;
+        }
+      }
+      console.log(`\n⚠️  KLZ Application not detected at ${BASE_URL}. Skipping integration tests.\n`);
+    } catch (e) {
+      isServerUp = false;
+    }
+  });
   async function verifyImageResponse(response: Response) {
-    expect(response.status).toBe(200);
+    expect(response.status, `Failed to fetch OG image: ${response.url}`).toBe(200);
-    expect(response.headers.get('content-type')).toContain('image/png');
+    const contentType = response.headers.get('content-type');
-    
+    expect(contentType, `Incorrect content type: ${contentType}`).toContain('image/png');
+
     const buffer = await response.arrayBuffer();
     const bytes = new Uint8Array(buffer);
-    
+
     // Check for PNG signature: 89 50 4E 47 0D 0A 1A 0A
     expect(bytes[0]).toBe(0x89);
     expect(bytes[1]).toBe(0x50);
     expect(bytes[2]).toBe(0x4E);
     expect(bytes[3]).toBe(0x47);
-    
+
     // Check that the image is not empty and has a reasonable size
-    // A 1200x630 OG image should be at least 4KB
+    expect(bytes.length, `Image size too small: ${bytes.length} bytes`).toBeGreaterThan(4000);
-    expect(bytes.length).toBeGreaterThan(4000);
   }
 
   locales.forEach((locale) => {
-    it(`should generate main OG image for ${locale}`, async () => {
+    it(`should generate main OG image for ${locale}`, async ({ skip }) => {
+      if (!isServerUp) skip();
       const url = `${BASE_URL}/${locale}/opengraph-image`;
       const response = await fetch(url);
       await verifyImageResponse(response);
     }, 30000);
 
-    it(`should generate product OG image for ${locale} with slug ${productSlugs[0]}`, async () => {
+    it(`should generate product OG image for ${locale} with slug ${productSlugs[0]}`, async ({ skip }) => {
+      if (!isServerUp) skip();
       const url = `${BASE_URL}/${locale}/api/og/product?slug=${productSlugs[0]}`;
       const response = await fetch(url);
       await verifyImageResponse(response);
     }, 30000);
 
-    it(`should return 400 for product OG image without slug in ${locale}`, async () => {
+    it(`should return 400 for product OG image without slug in ${locale}`, async ({ skip }) => {
+      if (!isServerUp) skip();
       const url = `${BASE_URL}/${locale}/api/og/product`;
       const response = await fetch(url);
       expect(response.status).toBe(400);
     }, 30000);
   });
 
-  it('should generate blog OG image', async () => {
+  it('should generate blog OG image', async ({ skip }) => {
+    if (!isServerUp) skip();
     const url = `${BASE_URL}/de/blog/opengraph-image`;
     const response = await fetch(url);
     await verifyImageResponse(response);
   }, 30000);
 });
+