voice.js

// VoiceRSS Javascript SDK
const VoiceRSS = {
  speech: function (e) {
    this._validate(e), this._request(e)
  },
  _validate: function (e) {
    if (!e) throw 'The settings are undefined'
    if (!e.key) throw 'The API key is undefined'
    if (!e.src) throw 'The text is undefined'
    if (!e.hl) throw 'The language is undefined'
    if (e.c && 'auto' != e.c.toLowerCase()) {
      var a = !1
      switch (e.c.toLowerCase()) {
        case 'mp3':
          a = new Audio().canPlayType('audio/mpeg').replace('no', '')
          break
        case 'wav':
          a = new Audio().canPlayType('audio/wav').replace('no', '')
          break
        case 'aac':
          a = new Audio().canPlayType('audio/aac').replace('no', '')
          break
        case 'ogg':
          a = new Audio().canPlayType('audio/ogg').replace('no', '')
          break
        case 'caf':
          a = new Audio().canPlayType('audio/x-caf').replace('no', '')
      }
      if (!a) throw 'The browser does not support the audio codec ' + e.c
    }
  },
  _request: function (e) {
    var a = this._buildRequest(e),
      t = this._getXHR()
    ;(t.onreadystatechange = function () {
      if (4 == t.readyState && 200 == t.status) {
        if (0 == t.responseText.indexOf('ERROR')) throw t.responseText
        audioElement.src = t.responseText
        audioElement.play()
      }
    }),
      t.open('POST', 'https://api.voicerss.org/', !0),
      t.setRequestHeader(
        'Content-Type',
        'application/x-www-form-urlencoded; charset=UTF-8'
      ),
      t.send(a)
  },
  _buildRequest: function (e) {
    var a = e.c && 'auto' != e.c.toLowerCase() ? e.c : this._detectCodec()
    return (
      'key=' +
      (e.key || '') +
      '&src=' +
      (e.src || '') +
      '&hl=' +
      (e.hl || '') +
      '&r=' +
      (e.r || '') +
      '&c=' +
      (a || '') +
      '&f=' +
      (e.f || '') +
      '&ssml=' +
      (e.ssml || '') +
      '&b64=true'
    )
  },
  _detectCodec: function () {
    var e = new Audio()
    return e.canPlayType('audio/mpeg').replace('no', '')
      ? 'mp3'
      : e.canPlayType('audio/wav').replace('no', '')
      ? 'wav'
      : e.canPlayType('audio/aac').replace('no', '')
      ? 'aac'
      : e.canPlayType('audio/ogg').replace('no', '')
      ? 'ogg'
      : e.canPlayType('audio/x-caf').replace('no', '')
      ? 'caf'
      : ''
  },
  _getXHR: function () {
    try {
      return new XMLHttpRequest()
    } catch (e) {}
    try {
      return new ActiveXObject('Msxml3.XMLHTTP')
    } catch (e) {}
    try {
      return new ActiveXObject('Msxml2.XMLHTTP.6.0')
    } catch (e) {}
    try {
      return new ActiveXObject('Msxml2.XMLHTTP.3.0')
    } catch (e) {}
    try {
      return new ActiveXObject('Msxml2.XMLHTTP')
    } catch (e) {}
    try {
      return new ActiveXObject('Microsoft.XMLHTTP')
    } catch (e) {}
    throw 'The browser does not support HTTP request'
  },
}