generateSitemaps

import { BASE_URL } from '@/app/lib/constants'

export async function generateSitemaps() {
  // 商品の総数を取得し、必要なサイトマップの数を計算
  return [{ id: 0 }, { id: 1 }, { id: 2 }, { id: 3 }]
}

export default async function sitemap({
  id,
}: {
  id: number
}): Promise<MetadataRoute.Sitemap> {
  // Googleの制限はサイトマップごとに50,000URL
  const start = id * 50000
  const end = start + 50000
  const products = await getProducts(
    `SELECT id, date FROM products WHERE id BETWEEN ${start} AND ${end}`
  )
  return products.map((product) => ({
    url: `${BASE_URL}/product/${product.id}`,
    lastModified: product.date,
  }))
}