xrf.js/level0.js

/**
 * ### import {...} from 'xrf/level0'
 *
 * | function               | example                                                                 |
 * |------------------------|-------------------------------------------------------------------------|
 * | fetchSideCarFiles(...) | fetchSideCarFiles("https://f.org/a.glb") // ["https://f.org/a.png",...] |
 *  
 */ 
import * as http from './scheme/http.js'
import * as xrf  from './scheme/http.js'

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

async function sideCarFiles(urlString, opts){

  const sext  = [".png",".ogg",".vtt",".json"]
}

async function fetchSideCarFiles(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}