yt appHEADmaster

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diff --git a/README.md b/README.md
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+# Youtube Audio Player
+
+Youtube audio player, great to play music in the background.  
+You can also check other repo [YT_Audio_Player_API](https://git.pruss.it/yt_audio_player_api/) using official Youtube API.  
+This one is scraping the website, so don't need an API key, but it could potentially break in future in case of changes on the website.
+
+![Youtube Audio Player](yt.jpg)
+
+## Usage
+
+1. Type song name and press [ENTER] to search it in YT
+2. Type result number and press [ENTER] to play the song
+3. Type a range of songs (ex. [2-5]) to play them in a row
+4. Type [r(nr)] (ex. [r2]) to find songs related to chosen result
+5. Type [h] and press [ENTER] to see this help page
+6. Type [q] and press [ENTER] to quit YT audio player
+
+## Dependencies
+
+The only dependency is a MPV player ([sources](https://mpv.io/installation/)).  
+It should be available in your favourite package manager.
+
diff --git a/apps/yt b/apps/yt
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+#!/usr/bin/env node
+/* pruss.it */
+
+const https = require('https')
+const readline = require("readline")
+const spawn = require('child_process').spawn
+
+let results = []
+
+const rl = readline.createInterface({
+  input: process.stdin,
+  output: process.stdout
+})
+
+const p = {
+  log: m => console.log(m),
+  cls: () => console.clear(),
+  inf: m => console.log(`\x1b[32m${m}\x1b[0m`),
+  err: e => console.error(`\x1b[31m${e}\x1b[0m`),
+  prt: () => prompt(),
+  res: () => showResults()
+}
+
+const joinRuns = t => t
+  ? t.runs
+    ? t.runs.map(r => r.text).join('').split(/\r\n|\r|\n/).slice(0,14).join('\n')
+    : t.simpleText
+  : '-'
+
+const convertViews = (v) => {
+  const t = v ? v.split(' ')[0].split('.') : '-'
+  switch(t.length) {
+    case 2: return t[0] + 'K'
+    case 3: return t[0] + 'M'
+    case 4: return t[0] + 'B'
+    default: return t
+  }
+}
+
+const findNested = (obj, key) => {
+  let r
+  for (let k in obj) {
+    if (obj.hasOwnProperty(k)) {
+      if (k === key) return obj[key]
+      else if (typeof obj[k] === "object") {
+        r = findNested(obj[k], key)
+        if (typeof r !== "undefined") return r
+      }
+    }
+  }
+}
+
+const findAllNested = (o, p) => {
+  var r = []
+  const f = (n, r) => {
+    if(n.hasOwnProperty(p)) r.push(n[p])
+    for(var i=0; i<Object.keys(n).length; i++){
+      if(typeof n[Object.keys(n)[i]] == "object"){
+        f(n[Object.keys(n)[i]], r)
+      }
+    }
+    return r
+  }
+  return f(o, r)
+}
+
+const showResults = () => {
+  results.forEach((r, i) => {
+    p.log(`\x1b[33m${i+1}. \x1b[36m${r.title} \x1b[32m[${r.length}] \x1b[35m${r.channel} \x1b[31m${r.views}\x1b[0m`)
+  })
+  p.log(' ')
+}
+
+const parseVideos = o => o.map(v => ({
+  id: v.videoId,
+  title: joinRuns(v.title),
+  length: v?.lengthText?.simpleText,
+  views: convertViews(v?.viewCountText?.simpleText),
+  channel: joinRuns(v?.shortBylineText)
+}))
+
+const handleResObj = (x) => {
+  const n = (findAllNested(JSON.parse(x[0])['contents'], 'videoRenderer'))
+  results = parseVideos(n)
+  p.cls(); p.res(); p.prt()
+}
+
+const objFromRes = (r, c) => {
+  const x = r.match(/(?<=ytInitialData = )(.*?)(?=;<\/script>)/gm)
+  if (x) c(x)
+}
+
+const getResponse = (u, c) => https.get(u, res => {
+  var r = ''
+  res.on('data', d => { r += d })
+  res.on('end', () => { objFromRes(r, c) })
+  res.on('error', e => { p.err(e) })
+})
+
+const isSongRange = q => q.match(/^[0-9]+-[0-9]+$/)
+
+const isSongName = q => q.match(/.{3,}/)
+
+const isRelated = q => q.match(/^r[0-9]+$/) && parseInt(q.replace('r','')) <= results.length
+
+const isSongNumber = q => q.match(/^[0-9]+$/) && parseInt(q) <= results.length
+
+const showPlaying = n => {
+  getResponse(('https://www.youtube.com/watch?v='+results[n].id), x => {
+    p.log('\x1b[32mDescription:\n------------\x1b[36m')
+    p.log(joinRuns(findNested(JSON.parse(x)['contents'], 'description')), '\x1b[0m')
+    p.log(' ')
+  })
+  p.log(`\n\x1b[32mCurrently playing:\n------------------\n\x1b[32mTitle: \x1b[36m${results[n].title}\n\x1b[32mChannel: \x1b[36m${results[n].channel}\n\x1b[32mLength: \x1b[36m${results[n].length}\n\x1b[32mViews: \x1b[36m${results[n].views}\x1b[0m\n`)
+}
+
+const showPlaylist = (r, n) => p.log(r.map(x=>`${x===n?'\x1b[33m':'\x1b[36m'}${x}. ${results[x-1].title}\x1b[0m`).join('\n'),'\n')
+
+const playNr = (n) => spawn('mpv', ['--no-video', '--msg-level=all=no,statusline=status', `https://www.youtube.com/watch?v=${results[parseInt(n)].id}`], { stdio: 'inherit' })
+
+const playNext = (r, n) => {
+  p.cls()
+  p.inf('Playlist:\n---------')
+  showPlaylist(r, n)
+  showPlaying(n-1)
+  const player = playNr(n-1)
+  player.on('close', () => {
+    if (n < r[r.length-1]){
+      playNext(r, n+1)
+    } else {
+      p.cls(); p.res(); p.prt()
+    }
+  })
+}
+
+const handleSongRange = q => {
+  if (results.length > 0) {
+    const [a,b] = q.split('-').map(n=>parseInt(n))
+    if (a<b){
+      const range = [...Array(b-a+1).keys()].map(n=>n+a)
+      playNext(range, range[0])
+    } else {
+      p.cls(); p.res(); p.err('invalid range, try again'); p.prt()
+    }
+  } else {
+    p.cls(); p.err('first search for the videos'); p.prt()
+  }
+};
+
+const handleRelated = q => getResponse(('https://www.youtube.com/watch?v='+results[parseInt(q.substring(1)) - 1].id), x => {
+  results = parseVideos(findAllNested(JSON.parse(x)['contents'], 'compactVideoRenderer'))
+  p.cls(); p.res(); p.prt()
+})
+
+const handleSongName = q => getResponse(('https://www.youtube.com/results?search_query='+q.replaceAll(' ', '+')), handleResObj)
+
+const handleSongNumber = q => {
+  const nr = parseInt(q) - 1
+  p.cls(); showPlaying(nr)
+  const player = playNr(nr)
+  player.on('close', () => { p.cls(); p.res(); p.prt() })
+}
+
+const handleHelp = () => {
+  p.cls()
+  p.log('\x1b[36mYT Audio Player (HELP)\n----------------------\n1. Type song name and press [ENTER] to search it in YT\n2. Type result number and press [ENTER] to play the song\n3. Type a range of songs (ex. [2-5]) to play them in a row\n4. Type [r(nr)] (ex. [r2]) to find songs related to chosen result\n5. Type [h] and press [ENTER] to see this help page\n6. Type [q] and press [ENTER] to quit YT audio player\x1b[0m\n')
+  p.prt()
+}
+
+const handleQuit = () => {
+  rl.close(); p.cls(); p.inf('See you!\n\n'); return 0
+}
+
+const handleWrongInput = () => {
+  p.cls(); p.res(); p.err('wrong input\n'); p.prt()
+}
+
+const handlePrompt = q => {
+  rl.pause()
+
+  if (isSongRange(q)) {
+    handleSongRange(q)
+  } else if (isRelated(q)) {
+    handleRelated(q)
+  } else if (isSongName(q)) {
+    handleSongName(q)
+  } else if (isSongNumber(q)) {
+    handleSongNumber(q)
+  } else if (q === 'h') {
+    handleHelp()
+  } else if (q === 'q') {
+    handleQuit()
+  } else {
+    handleWrongInput()
+  }
+}
+
+const prompt = () => {
+  rl.resume()
+  rl.question("\x1b[32mYT Audio Player ([h]elp, [q]uit): \x1b[0m", k => { handlePrompt(k) })
+}
+
+p.cls(); p.prt()
diff --git a/yt.jpg b/yt.jpg
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+++ b/yt.jpg