commerce/packages/saleor/api/utils/is-allowed-method.ts

import type { NextApiRequest, NextApiResponse } from 'next'

export default function isAllowedMethod(req: NextApiRequest, res: NextApiResponse, allowedMethods: string[]) {
  const methods = allowedMethods.includes('OPTIONS') ? allowedMethods : [...allowedMethods, 'OPTIONS']

  if (!req.method || !methods.includes(req.method)) {
    res.status(405)
    res.setHeader('Allow', methods.join(', '))
    res.end()
    return false
  }

  if (req.method === 'OPTIONS') {
    res.status(200)
    res.setHeader('Allow', methods.join(', '))
    res.setHeader('Content-Length', '0')
    res.end()
    return false
  }

  return true
}