import * as http from './scheme/http.js'
import * as xrf  from './scheme/http.js'

function defaultSchemes(){
  return {http,xrf}
}

async function pollSideCarFiles(urlString, opts){

  opts        = {}
  opts.scheme = opts.scheme || defaultSchemes()
  let p       = []
  const sext  = [".png",".ogg",".vtt",".json"]
  ext         = urlString.lastIndexOf('.')

  for( let i in ext) p.push( 
    new Promise( (resolve,reject) => {
      fetch( urlString.replace(ext, sext[i] ), { method:'HEAD'} )
    })
  )
  await Promise.all(p)
}

export {pollSideCarFiles}