Use @astrojs/sitemap instead of manual sitemap.xml.ts

- astro.config.mjs: site=https://dealplustech.co.th, add sitemap integration
- Remove hardcoded sitemap.xml.ts (now auto-generated)

src/pages/sitemap.xml.ts

@@ -1,153 +0,0 @@
-/**
- * /sitemap.xml.ts — Custom sitemap with per-type priority/changefreq.
- *
- * Generates a sitemap by:
- *   1. Listing all static .astro pages (excluding 404 + dynamic [slug])
- *   2. Walking content collections (blog) for dynamic routes
- *   3. Classifying each URL into a category to assign priority + changefreq
- *
- * Per Astro 6, the file lives in src/pages/ and exports a GET handler.
- */
-import type { APIRoute } from 'astro';
-import { getCollection } from 'astro:content';
-
-const SITE = 'https://dealplustech.co.th';
-
-// ---------------------------------------------------------------------------
-// URL classification
-// ---------------------------------------------------------------------------
-
-const NOINDEX_PAGES = new Set([
-  'privacy-policy',
-  'terms-and-conditions',
-  '404',
-]);
-
-const PRODUCT_SLUGS = new Set([
-  'aeroflex', 'armflex', 'durgo-avvs', 'grilles', 'maxflex',
-  'pipe-coupling', 'realflex', 'water-pump', 'water-treatment',
-  'ตู้ดับเพลิง',
-  'ท่อ-hdpe', 'ท่อ-ppr-scg', 'ท่อ-ppr-thai-ppr', 'ท่อ-syler',
-  'ท่อ-upvc', 'ท่อ-xy-lent',
-  'ระบบรั้วไวน์แมน', 'รั้วเทวดา',
-  'วาล์ว-valve', 'หัวจ่าย-ball-jet',
-  'เครื่องเชื่อม-hdpe', 'เครื่องเชื่อม-ppr',
-  'เทอร์โมเบรค-thermobreak', 'เม็กกรู๊ฟ-คับปลิ้ง',
-]);
-
-const HOMEPAGE_SLUGS = new Set(['index', 'all-products']);
-const CATEGORY_SLUGS = new Set(['ระบบน้ำ']);
-const STATIC_SLUGS = new Set(['about-us', 'contact-us', 'portfolio']);
-
-type Entry = {
-  loc: string;
-  priority: number;
-  changefreq: 'daily' | 'weekly' | 'monthly' | 'yearly';
-  lastmod?: string;
-};
-
-function classify(slug: string): { priority: number; changefreq: Entry['changefreq'] } {
-  if (slug === 'index') return { priority: 1.0, changefreq: 'weekly' };
-  if (slug === 'all-products') return { priority: 0.9, changefreq: 'weekly' };
-  if (PRODUCT_SLUGS.has(slug)) return { priority: 0.9, changefreq: 'monthly' };
-  if (CATEGORY_SLUGS.has(slug)) return { priority: 0.8, changefreq: 'monthly' };
-  if (STATIC_SLUGS.has(slug)) return { priority: 0.6, changefreq: 'yearly' };
-  return { priority: 0.5, changefreq: 'monthly' };
-}
-
-function urlFromSlug(slug: string): string {
-  if (slug === 'index') return `${SITE}/`;
-  return `${SITE}/${slug}`;
-}
-
-// ---------------------------------------------------------------------------
-// Build entries
-// ---------------------------------------------------------------------------
-
-async function buildEntries(): Promise<Entry[]> {
-  // 1. Static pages — discovered via Vite's import.meta.glob
-  const modules = import.meta.glob<true>('./*.astro');
-  const pageFiles = Object.keys(modules)
-    .map(p => p.replace(/^\.\//, '').replace(/\.astro$/, ''))
-    .filter(slug => !slug.startsWith('[') && !NOINDEX_PAGES.has(slug));
-
-  const entries: Entry[] = pageFiles.map(slug => {
-    const { priority, changefreq } = classify(slug);
-    return { loc: urlFromSlug(slug), priority, changefreq };
-  });
-
-  // 2. Blog posts (dynamic [slug] route)
-  const articles = await getCollection('blog');
-  for (const article of articles) {
-    entries.push({
-      loc: `${SITE}/${encodeURI('บทความ')}/${encodeURIComponent(article.id)}`,
-      priority: 0.7,
-      changefreq: 'yearly',
-      lastmod: article.data.published_at.toISOString(),
-    });
-  }
-
-  // 3. Blog index
-  entries.push({
-    loc: `${SITE}/${encodeURI('บทความ')}`,
-    priority: 0.7,
-    changefreq: 'weekly',
-  });
-
-  // Sort: homepage first, then by priority desc, then by URL asc
-  entries.sort((a, b) => {
-    if (a.loc === `${SITE}/`) return -1;
-    if (b.loc === `${SITE}/`) return 1;
-    if (a.priority !== b.priority) return b.priority - a.priority;
-    return a.loc.localeCompare(b.loc);
-  });
-
-  return entries;
-}
-
-// ---------------------------------------------------------------------------
-// XML serialiser
-// ---------------------------------------------------------------------------
-
-function escapeXml(s: string): string {
-  return s
-    .replace(/&/g, '&amp;')
-    .replace(/</g, '&lt;')
-    .replace(/>/g, '&gt;')
-    .replace(/"/g, '&quot;')
-    .replace(/'/g, '&apos;');
-}
-
-function toXml(entries: Entry[]): string {
-  const urls = entries.map(e => {
-    const lastmod = e.lastmod ? `\n    <lastmod>${e.lastmod}</lastmod>` : '';
-    return `  <url>
-    <loc>${escapeXml(e.loc)}</loc>${lastmod}
-    <changefreq>${e.changefreq}</changefreq>
-    <priority>${e.priority.toFixed(1)}</priority>
-  </url>`;
-  }).join('\n');
-
-  return `<?xml version="1.0" encoding="UTF-8"?>
-<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
-${urls}
-</urlset>
-`;
-}
-
-// ---------------------------------------------------------------------------
-// Handler
-// ---------------------------------------------------------------------------
-
-export const GET: APIRoute = async () => {
-  const entries = await buildEntries();
-  const xml = toXml(entries);
-
-  return new Response(xml, {
-    status: 200,
-    headers: {
-      'Content-Type': 'application/xml; charset=utf-8',
-      'Cache-Control': 'public, max-age=3600',
-    },
-  });
-};