debut refacto

app/api/upload/check/route.ts

@@ -0,0 +1,50 @@
+import { NextRequest, NextResponse } from 'next/server'
+import { validateUploadSecret } from '@/lib/auth'
+import { sanitizeFilename } from '@/lib/sanitize'
+import { VALID_DESTINATIONS } from '@/lib/constants'
+import { getRemoteFolder } from '@/lib/github'
+
+export const runtime = 'nodejs'
+export const dynamic = 'force-dynamic'
+
+/**
+ * GET /api/upload/check?destination=...&folderName=...
+ * Check if a folder already exists on the remote repo and return file SHAs.
+ */
+export async function GET(req: NextRequest) {
+  const authError = validateUploadSecret(req)
+  if (authError) return authError
+
+  const { searchParams } = new URL(req.url)
+  const destination = searchParams.get('destination')?.trim()
+  const folderName = searchParams.get('folderName')?.trim()
+
+  if (!destination || !folderName) {
+    return NextResponse.json({ success: false, error: 'Parametres manquants' }, { status: 400 })
+  }
+
+  if (!VALID_DESTINATIONS.has(destination as never)) {
+    return NextResponse.json({ success: false, error: 'Destination invalide' }, { status: 400 })
+  }
+
+  const safeFolderName = sanitizeFilename(folderName).replace(/[^a-zA-Z0-9-_]/g, '-')
+  const folderPath = `public/models/${destination}/${safeFolderName}`
+
+  try {
+    const { exists, files } = await getRemoteFolder(folderPath)
+
+    if (exists) {
+      return NextResponse.json({
+        success: true,
+        exists: true,
+        path: folderPath,
+        files,
+      })
+    }
+
+    return NextResponse.json({ success: true, exists: false })
+  } catch (err) {
+    const message = err instanceof Error ? err.message : 'Erreur inconnue'
+    return NextResponse.json({ success: false, error: message }, { status: 500 })
+  }
+}