initial migration

lib/seo.ts

@@ -0,0 +1,130 @@
+import { Metadata } from 'next';
+import { getSiteInfo } from './i18n';
+import type { Locale } from './i18n';
+
+export interface SEOParams {
+  title?: string;
+  description?: string;
+  locale?: Locale;
+  canonical?: string;
+  ogType?: 'website' | 'article' | 'product';
+  ogImages?: string[];
+  publishedTime?: string;
+  updatedTime?: string;
+  author?: string;
+}
+
+export function generateSEOMetadata({
+  title,
+  description,
+  locale = 'en',
+  canonical,
+  ogType = 'website',
+  ogImages = [],
+  publishedTime,
+  updatedTime,
+  author,
+}: SEOParams): Metadata {
+  const site = getSiteInfo(locale);
+  
+  const pageTitle = title ? `${title} | ${site.title}` : site.title;
+  const pageDescription = description || site.description;
+  
+  const baseUrl = process.env.NEXT_PUBLIC_SITE_URL || site.baseUrl;
+  const path = canonical || '/';
+  const fullUrl = `${baseUrl}${path}`;
+  
+  // Generate alternate URLs for both locales
+  const alternates = {
+    canonical: fullUrl,
+    languages: {
+      'en': `${baseUrl}${path.replace('/de/', '/')}`,
+      'de': `${baseUrl}${path.startsWith('/de') ? path : `/de${path}`}`,
+    },
+  };
+
+  const openGraph = {
+    title: pageTitle,
+    description: pageDescription,
+    url: fullUrl,
+    siteName: site.title,
+    locale: locale === 'de' ? 'de_DE' : 'en_US',
+    type: ogType,
+    ...(ogImages.length > 0 && { images: ogImages }),
+    ...(publishedTime && { publishedTime }),
+    ...(updatedTime && { updatedTime }),
+    ...(author && { authors: [author] }),
+  };
+
+  const twitter = {
+    card: 'summary_large_image',
+    title: pageTitle,
+    description: pageDescription,
+    ...(ogImages.length > 0 && { images: ogImages }),
+  };
+
+  return {
+    title: pageTitle,
+    description: pageDescription,
+    alternates,
+    openGraph,
+    twitter,
+    authors: author ? [{ name: author }] : undefined,
+    metadataBase: new URL(baseUrl),
+  };
+}
+
+// Helper for blog posts
+export function getPostSEO(post: any, locale: Locale): Metadata {
+  return generateSEOMetadata({
+    title: post.title,
+    description: post.excerptHtml?.replace(/<[^>]*>/g, '') || '',
+    canonical: post.path,
+    locale: locale,
+    ogType: 'article',
+    ogImages: post.featuredImage ? [post.featuredImage] : [],
+    publishedTime: post.datePublished,
+    updatedTime: post.updatedAt,
+    author: 'KLZ Cables Team',
+  });
+}
+
+// Helper for products
+export function getProductSEO(product: any, locale: Locale): Metadata {
+  return generateSEOMetadata({
+    title: product.name,
+    description: product.shortDescriptionHtml?.replace(/<[^>]*>/g, '') || '',
+    canonical: product.path,
+    locale: locale,
+    ogType: 'product',
+    ogImages: product.images || [],
+  });
+}
+
+// Helper for categories
+export function getCategorySEO(category: any, locale: Locale): Metadata {
+  return generateSEOMetadata({
+    title: category.name,
+    description: category.description || `Products in ${category.name}`,
+    canonical: category.path,
+    locale: locale,
+    ogType: 'website',
+  });
+}
+
+export function generateSitemapItem({
+  path,
+  lastmod,
+  priority = 0.7,
+}: {
+  path: string;
+  lastmod?: string;
+  priority?: number;
+}) {
+  return {
+    url: path,
+    lastmod: lastmod || new Date().toISOString().split('T')[0],
+    changefreq: 'weekly',
+    priority,
+  };
+}