Initial Commit

2026-10-03 20:07:49 +02:00
commit a1346c98b1
427 changed files with 59320 additions and 0 deletions
@@ -0,0 +1,37 @@
+import { createHash } from 'node:crypto'
+import { eq } from 'drizzle-orm'
+import { linkPreviews } from '../db/schema'
+
+const CACHE_TTL_MS = 1000 * 60 * 60 * 24
+
+export default defineEventHandler(async (event) => {
+  const url = String(getQuery(event).url ?? '')
+  if (!/^https?:\/\//i.test(url) || url.length > 2048) {
+    throw createError({ statusCode: 400, statusMessage: 'Ungültige URL' })
+  }
+
+  const urlHash = createHash('sha256').update(url).digest('hex')
+  const db = useDb()
+  const [cached] = await db
+    .select()
+    .from(linkPreviews)
+    .where(eq(linkPreviews.urlHash, urlHash))
+    .limit(1)
+
+  if (cached && Date.now() - cached.fetchedAt.getTime() < CACHE_TTL_MS) {
+    return { image: cached.image, title: cached.title }
+  }
+
+  const preview = await fetchLinkPreview(url)
+  // Vorschaubild lokal speichern — die Remote-URL ist nicht stabil
+  const image = preview.image
+    ? (await savePreviewImage(`links/${urlHash}`, preview.image)) ?? preview.image
+    : null
+  await db
+    .insert(linkPreviews)
+    .values({ urlHash, url, image, title: preview.title, fetchedAt: new Date() })
+    .onDuplicateKeyUpdate({
+      set: { image, title: preview.title, fetchedAt: new Date() },
+    })
+  return { image, title: preview.title }
+})