voice.js

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"
  }
};