function videoFileActivityUrlToDBAttributes (videoCreated: VideoModel, videoObject: VideoTorrentObject) {
  const mimeTypes = Object.keys(VIDEO_MIMETYPE_EXT)
  const fileUrls = videoObject.url.filter(u => {
    return mimeTypes.indexOf(u.mimeType) !== -1 && u.mimeType.startsWith('video/')
  })

  if (fileUrls.length === 0) {
    throw new Error('Cannot find video files for ' + videoCreated.url)
  }

  const attributes = []
  for (const fileUrl of fileUrls) {
    // Fetch associated magnet uri
    const magnet = videoObject.url.find(u => {
      return u.mimeType === 'application/x-bittorrent;x-scheme-handler/magnet' && u.width === fileUrl.width
    })

    if (!magnet) throw new Error('Cannot find associated magnet uri for file ' + fileUrl.href)

    const parsed = magnetUtil.decode(magnet.href)
    if (!parsed || isVideoFileInfoHashValid(parsed.infoHash) === false) throw new Error('Cannot parse magnet URI ' + magnet.href)

    const attribute = {
      extname: VIDEO_MIMETYPE_EXT[ fileUrl.mimeType ],
      infoHash: parsed.infoHash,
      resolution: fileUrl.width,
      size: fileUrl.size,
      videoId: videoCreated.id
    }
    attributes.push(attribute)
  }

  return attributes
}

import * as magnet from 'magnet-uri';

// "Leaves of Grass" by Walt Whitman
// tslint:disable-next-line:max-line-length
const uri = 'magnet:?xt=urn:btih:d2474e86c95b19b8bcfdb92bc12c9d44667cfa36&dn=Leaves+of+Grass+by+Walt+Whitman.epub&tr=udp%3A%2F%2Ftracker.example4.com%3A80&tr=udp%3A%2F%2Ftracker.example5.com%3A80&tr=udp%3A%2F%2Ftracker.example3.com%3A6969&tr=udp%3A%2F%2Ftracker.example2.com%3A80&tr=udp%3A%2F%2Ftracker.example1.com%3A1337';

const parsed = magnet.decode(uri);
console.log(parsed);
console.log(magnet.encode(parsed));

 var dupes = Object.keys(torrents).filter((key) => {
     return magnet.decode(data.magnet).infoHash == torrents[key].infoHash;
 });