feat: init sitemaps generation

apps/web/app/api/sitemap/route.ts

@@ -0,0 +1,61 @@
+import { getUriWithOrg } from '@services/config/config';
+import { getOrgCourses } from '@services/courses/courses';
+import { getOrganizationContextInfo } from '@services/organizations/orgs';
+import { NextRequest, NextResponse } from 'next/server';
+
+
+export async function GET(request: NextRequest) {
+  const orgSlug = request.headers.get('X-Sitemap-Orgslug');
+
+  if (!orgSlug) {
+    return NextResponse.json({ error: 'Missing X-Sitemap-Orgslug header' }, { status: 400 });
+  }
+
+  const orgInfo = await getOrganizationContextInfo(orgSlug, null);
+  const courses = await getOrgCourses(orgSlug, null);
+
+  const host = request.headers.get('host');
+  if (!host) {
+    return NextResponse.json({ error: 'Missing host header' }, { status: 400 });
+  }
+
+  const baseUrl = getUriWithOrg(orgSlug, '/');
+
+  const sitemapUrls: SitemapUrl[] = [
+    { loc: baseUrl, priority: 1.0, changefreq: 'daily' },
+    ...courses.map((course: { course_uuid: string }) => ({ 
+      loc: `${baseUrl}course/${course.course_uuid.replace('course_', '')}`, 
+      priority: 0.8,
+      changefreq: 'weekly'
+    }))
+  ];
+
+  const sitemap = generateSitemap(baseUrl, sitemapUrls);
+
+  return new NextResponse(sitemap, {
+    headers: {
+      'Content-Type': 'application/xml',
+    },
+  });
+}
+
+interface SitemapUrl {
+    loc: string;
+    priority: number;
+    changefreq: string;
+  }
+  
+  function generateSitemap(baseUrl: string, urls: SitemapUrl[]): string {
+    const urlEntries = urls.map(({ loc, priority, changefreq }) => `
+    <url>
+      <loc>${loc}</loc>
+      <priority>${priority.toFixed(1)}</priority>
+      <changefreq>${changefreq}</changefreq>
+    </url>`).join('');
+  
+    return `<?xml version="1.0" encoding="UTF-8"?>
+  <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
+  ${urlEntries}
+  </urlset>`;
+  }
+