How We Handle Image Uploads with R2

import sharp from "sharp"

const optimized = await sharp(rawBuffer)
  .resize(1280, 720, {
    fit: "inside",
    withoutEnlargement: true,
  })
  .webp({ quality: 80, effort: 4 })
  .toBuffer()

const key = `thumbnails/${Date.now()}-${id}.webp`
await uploadToR2(key, optimized, "image/webp")

async function uploadToR2(key: string, data: Buffer, contentType: string) {
  if (!process.env.R2_BUCKET) {
    // Fallback: save to local public directory
    const path = join(process.cwd(), "public/uploads", key)
    await mkdir(dirname(path), { recursive: true })
    await writeFile(path, data)
    return `/uploads/${key}`
  }

  // Production: upload to Cloudflare R2
  await r2.putObject({ Bucket, Key: key, Body: data, ContentType: contentType })
  return `${CDN_URL}/${key}`
}