From df93f83fcdee7e4e654161fb946ce6e37932883f Mon Sep 17 00:00:00 2001
From: vikingowl <christian@nachtigall.dev>
Date: Sun, 22 Feb 2026 11:45:27 +0100
Subject: [PATCH] feat(seo): add sitemap, canonical URLs, structured data, and
 OG/Twitter tags

- Add dynamic sitemap.xml with static pages and market entries
- Add canonical URLs and base OG/Twitter meta tags in root layout
- Add JSON-LD WebSite schema with SearchAction on home page
- Add JSON-LD Event schema on market detail pages
- Add twitter:card summary_large_image for markets with images
- Add OG tags to impressum and datenschutz pages
- Add font preloading for critical rendering path fonts
- Add Sitemap directive to robots.txt
---
 web/src/app.html                         |  2 +
 web/src/routes/+layout.svelte            |  8 ++++
 web/src/routes/+page.svelte              | 15 +++++++
 web/src/routes/datenschutz/+page.svelte  |  3 ++
 web/src/routes/impressum/+page.svelte    |  3 ++
 web/src/routes/markt/[slug]/+page.svelte | 38 ++++++++++++++++
 web/src/routes/sitemap.xml/+server.ts    | 55 ++++++++++++++++++++++++
 web/static/robots.txt                    |  2 +
 8 files changed, 126 insertions(+)
 create mode 100644 web/src/routes/sitemap.xml/+server.ts

diff --git a/web/src/app.html b/web/src/app.html
index e65f5d0..3b6587d 100644
--- a/web/src/app.html
+++ b/web/src/app.html
@@ -9,6 +9,8 @@
 		<link rel="manifest" href="%sveltekit.assets%/site.webmanifest" />
 		<meta name="theme-color" content="#1a3d24" media="(prefers-color-scheme: light)" />
 		<meta name="theme-color" content="#0f2818" media="(prefers-color-scheme: dark)" />
+		<link rel="preload" href="%sveltekit.assets%/fonts/crimsonpro-400.woff2" as="font" type="font/woff2" crossorigin />
+		<link rel="preload" href="%sveltekit.assets%/fonts/medievalsharp-400.woff2" as="font" type="font/woff2" crossorigin />
 		<script>
 			(function () {
 				var t = localStorage.getItem('marktvogt-theme');
diff --git a/web/src/routes/+layout.svelte b/web/src/routes/+layout.svelte
index 8fc45ef..7dd4c4f 100644
--- a/web/src/routes/+layout.svelte
+++ b/web/src/routes/+layout.svelte
@@ -2,6 +2,7 @@
 	import '../app.css';
 	import Header from '$lib/components/layout/Header.svelte';
 	import Footer from '$lib/components/layout/Footer.svelte';
+	import { page } from '$app/stores';
 	import type { Snippet } from 'svelte';
 
 	interface Props {
@@ -10,11 +11,18 @@
 	}
 
 	let { data, children }: Props = $props();
+
+	const canonicalUrl = $derived(`https://marktvogt.de${$page.url.pathname}`);
 </script>
 
 <svelte:head>
 	<title>Marktvogt - Mittelaltermärkte finden</title>
 	<meta name="description" content="Finde Mittelaltermärkte, Ritterturniere und historische Feste in deiner Nähe." />
+	<link rel="canonical" href={canonicalUrl} />
+	<meta property="og:site_name" content="Marktvogt" />
+	<meta property="og:locale" content="de_DE" />
+	<meta property="og:url" content={canonicalUrl} />
+	<meta name="twitter:card" content="summary" />
 </svelte:head>
 
 <a href="#main-content" class="skip-link">Zum Inhalt springen</a>
diff --git a/web/src/routes/+page.svelte b/web/src/routes/+page.svelte
index c312dd2..17ac186 100644
--- a/web/src/routes/+page.svelte
+++ b/web/src/routes/+page.svelte
@@ -11,6 +11,21 @@
 
 <svelte:head>
 	<title>Marktvogt - Mittelaltermärkte finden</title>
+	<meta property="og:title" content="Marktvogt - Mittelaltermärkte finden" />
+	<meta property="og:description" content="Finde Mittelaltermärkte, Ritterturniere und historische Feste in deiner Nähe. Suche nach Ort, Datum oder Stichwort." />
+	<meta property="og:type" content="website" />
+	{@html `<script type="application/ld+json">${JSON.stringify({
+		"@context": "https://schema.org",
+		"@type": "WebSite",
+		"name": "Marktvogt",
+		"url": "https://marktvogt.de",
+		"description": "Verzeichnis für Mittelaltermärkte, Ritterturniere und historische Feste in Deutschland",
+		"potentialAction": {
+			"@type": "SearchAction",
+			"target": "https://marktvogt.de/?q={search_term_string}",
+			"query-input": "required name=search_term_string"
+		}
+	})}</script>`}
 </svelte:head>
 
 <div class="mx-auto max-w-7xl px-4 py-8 sm:px-6 lg:px-8">
diff --git a/web/src/routes/datenschutz/+page.svelte b/web/src/routes/datenschutz/+page.svelte
index 312489f..496f023 100644
--- a/web/src/routes/datenschutz/+page.svelte
+++ b/web/src/routes/datenschutz/+page.svelte
@@ -1,6 +1,9 @@
 <svelte:head>
 	<title>Datenschutzerklärung - Marktvogt</title>
 	<meta name="description" content="Datenschutzerklärung für Marktvogt – Informationen zur Verarbeitung personenbezogener Daten." />
+	<meta property="og:title" content="Datenschutzerklärung - Marktvogt" />
+	<meta property="og:description" content="Datenschutzerklärung für Marktvogt – Informationen zur Verarbeitung personenbezogener Daten." />
+	<meta property="og:type" content="website" />
 </svelte:head>
 
 <div class="mx-auto max-w-3xl px-4 py-8 sm:px-6 lg:px-8">
diff --git a/web/src/routes/impressum/+page.svelte b/web/src/routes/impressum/+page.svelte
index 9461490..437cecb 100644
--- a/web/src/routes/impressum/+page.svelte
+++ b/web/src/routes/impressum/+page.svelte
@@ -1,6 +1,9 @@
 <svelte:head>
 	<title>Impressum - Marktvogt</title>
 	<meta name="description" content="Impressum und Angaben gemäß § 5 TMG für Marktvogt." />
+	<meta property="og:title" content="Impressum - Marktvogt" />
+	<meta property="og:description" content="Impressum und Angaben gemäß § 5 TMG für Marktvogt." />
+	<meta property="og:type" content="website" />
 </svelte:head>
 
 <div class="mx-auto max-w-3xl px-4 py-8 sm:px-6 lg:px-8">
diff --git a/web/src/routes/markt/[slug]/+page.svelte b/web/src/routes/markt/[slug]/+page.svelte
index cea0e07..2072a09 100644
--- a/web/src/routes/markt/[slug]/+page.svelte
+++ b/web/src/routes/markt/[slug]/+page.svelte
@@ -36,8 +36,46 @@
 	<meta property="og:description" content="{market.description?.slice(0, 200)}" />
 	{#if market.image_url}
 		<meta property="og:image" content={market.image_url} />
+		<meta name="twitter:card" content="summary_large_image" />
 	{/if}
 	<meta property="og:type" content="event" />
+	{@html `<script type="application/ld+json">${JSON.stringify({
+		"@context": "https://schema.org",
+		"@type": "Event",
+		"name": market.name,
+		"startDate": market.start_date,
+		"endDate": market.end_date,
+		"eventAttendanceMode": "https://schema.org/OfflineEventAttendanceMode",
+		"eventStatus": "https://schema.org/EventScheduled",
+		...(market.description ? { "description": market.description.slice(0, 500) } : {}),
+		...(market.image_url ? { "image": market.image_url } : {}),
+		...(market.website ? { "url": market.website } : {}),
+		...(market.organizer_name ? { "organizer": { "@type": "Organization", "name": market.organizer_name } } : {}),
+		"location": {
+			"@type": "Place",
+			"name": market.name,
+			"address": {
+				"@type": "PostalAddress",
+				"streetAddress": market.street,
+				"addressLocality": market.city,
+				"postalCode": market.zip,
+				"addressRegion": market.state,
+				"addressCountry": market.country
+			},
+			"geo": {
+				"@type": "GeoCoordinates",
+				"latitude": market.latitude,
+				"longitude": market.longitude
+			}
+		},
+		...(admission && admission.adult_cents > 0 ? { "offers": {
+			"@type": "Offer",
+			"price": (admission.adult_cents / 100).toFixed(2),
+			"priceCurrency": "EUR",
+			"availability": "https://schema.org/InStock",
+			"validFrom": market.start_date
+		}} : {})
+	})}</script>`}
 </svelte:head>
 
 <div class="mx-auto max-w-4xl px-4 py-8 sm:px-6 lg:px-8">
diff --git a/web/src/routes/sitemap.xml/+server.ts b/web/src/routes/sitemap.xml/+server.ts
new file mode 100644
index 0000000..75940c0
--- /dev/null
+++ b/web/src/routes/sitemap.xml/+server.ts
@@ -0,0 +1,55 @@
+import type { RequestHandler } from './$types.js';
+import { apiFetch } from '$lib/api/client.js';
+import type { MarketSummary } from '$lib/api/types.js';
+
+const ORIGIN = 'https://marktvogt.de';
+
+function escapeXml(str: string): string {
+	return str.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
+}
+
+export const GET: RequestHandler = async ({ fetch }) => {
+	const staticPages = [
+		{ path: '/', priority: '1.0', changefreq: 'daily' },
+		{ path: '/impressum', priority: '0.2', changefreq: 'yearly' },
+		{ path: '/datenschutz', priority: '0.2', changefreq: 'yearly' }
+	];
+
+	let markets: MarketSummary[] = [];
+	try {
+		const res = await apiFetch<MarketSummary[]>('/markets?per_page=1000', { fetch });
+		markets = res.data;
+	} catch {
+		// Backend unreachable — return static pages only
+	}
+
+	const urls = staticPages
+		.map(
+			(p) => `  <url>
+    <loc>${ORIGIN}${p.path}</loc>
+    <changefreq>${p.changefreq}</changefreq>
+    <priority>${p.priority}</priority>
+  </url>`
+		)
+		.concat(
+			markets.map(
+				(m) => `  <url>
+    <loc>${ORIGIN}/markt/${escapeXml(m.slug)}</loc>
+    <changefreq>weekly</changefreq>
+    <priority>0.8</priority>
+  </url>`
+			)
+		);
+
+	const xml = `<?xml version="1.0" encoding="UTF-8"?>
+<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
+${urls.join('\n')}
+</urlset>`;
+
+	return new Response(xml, {
+		headers: {
+			'Content-Type': 'application/xml',
+			'Cache-Control': 'max-age=3600'
+		}
+	});
+};
diff --git a/web/static/robots.txt b/web/static/robots.txt
index b6dd667..18b0899 100644
--- a/web/static/robots.txt
+++ b/web/static/robots.txt
@@ -1,3 +1,5 @@
 # allow crawling everything by default
 User-agent: *
 Disallow:
+
+Sitemap: https://marktvogt.de/sitemap.xml