Automatically reads messages in a chatroom page. (i.e. Picarto, Twitch, Youtube, etc.)

autotts.meta.js

// ==UserScript==
// @name         Auto TTS
// @namespace    larryc5
// @version      0.1
// @description  Automatically reads messages in a chatroom page. (i.e. Picarto, Twitch, Youtube, etc.)
// @author       Larry Costigan <[email protected]>
// @match        https://picarto.tv/chatpopout/*/public
// @require      https://code.jquery.com/jquery-latest.min.js
// @grant        GM_setValue
// @grant        GM_getValue
// @downloadURL  https://gist.githubusercontent.com/larryc5/1f5705400d1a5d8fbf72270f289d8d12/raw/autotts.user.js
// @updateURL    https://gist.githubusercontent.com/larryc5/1f5705400d1a5d8fbf72270f289d8d12/raw/autotts.meta.js
// ==/UserScript==

autotts.user.js

// ==UserScript==
// @name         Auto TTS
// @namespace    larryc5
// @version      0.1
// @description  Automatically reads messages in a chatroom page. (i.e. Picarto, Twitch, Youtube, etc.)
// @author       Larry Costigan <[email protected]>
// @match        https://picarto.tv/chatpopout/*/public
// @require      https://code.jquery.com/jquery-latest.min.js
// @grant        GM_setValue
// @grant        GM_getValue
// @downloadURL  https://gist.githubusercontent.com/larryc5/1f5705400d1a5d8fbf72270f289d8d12/raw/autotts.user.js
// @updateURL    https://gist.githubusercontent.com/larryc5/1f5705400d1a5d8fbf72270f289d8d12/raw/autotts.meta.js
// ==/UserScript==

(function(window) {
  'use strict';

  var $                        = window.jQuery;
  var console                  = window.console;
  var document                 = window.document;
  var location                 = window.location;
  var Math                     = window.Math;
  var MutationObserver         = window.MutationObserver;
  var navigator                = window.navigator;
  var Promise                  = window.Promise;
  var speechSynthesis          = window.speechSynthesis;
  var SpeechSynthesisUtterance = window.SpeechSynthesisUtterance;
  var String                   = window.String;

  var p = Promise.resolve();
  var $volume = $('<input title="volume" type="range" min="0" max="1" step="0.001" />')
    .val(GM_getValue('volume', 1))
    .on('change', function() {
      var volume = $volume.val();
      GM_setValue('volume', volume);
      $volume.next().text((volume * 100).toFixed(1) + '%');
    });
  var $containerSelector = $('<input title="container selector" type="text">')
    .val(GM_getValue('containerSelector.'+ location.host, '.messageli'))
    .on('change', function() {
      GM_setValue('containerSelector.'+ location.host, $containerSelector.val());
    });
  var $textSelector = $('<input title="text selector" type="text">')
    .val(GM_getValue('textSelector.'+ location.host, '.theMsg'))
    .on('change', function() {
      GM_setValue('textSelector.'+ location.host, $textSelector.val());
    });
  var $speakerSelector = $('<input title="speaker selector" type="text">')
    .val(GM_getValue('speakerSelector.'+ location.host, '.msgUsername'))
    .on('change', function() {
      GM_setValue('speakerSelector.'+ location.host, $speakerSelector.val());
    });

  function speak(text, speaker) {
    text = String(text || '').trim().toLowerCase().replace(/\s+/g, ' ');
    if (!text) return;
    speaker = speaker ? speaker.trim().toLowerCase().replace(/\s+/g, ' ') : text;

    var voices = speechSynthesis.getVoices();
    var userLang = String(navigator.language || navigator.userLanguage || '').slice(2).toLowerCase();
    voices = voices.filter(function(voice) {
      return voice.lang.slice(2).toLowerCase() === userLang;
    });
    if (!(voices && voices.length > 0)) {
      console.error('No voices found.');
      return;
    }

    var speakerVal = speaker.split('').reduce(function(a, b) {
      a ^= b.charCodeAt(0);
      a ^= a << 13;
      a ^= a >> 17;
      a ^= a << 5;
      return a;
    }, 0) >>> 0;

    var voice = voices[speakerVal % voices.length];

    var utterance = new SpeechSynthesisUtterance(text);

    utterance.voice = voice;
    utterance.volume = $volume.val();
    utterance.pitch = Math.sin(speakerVal*2*Math.sqrt(2)) + 1;
    utterance.rate = Math.sin(speakerVal*3*Math.sqrt(3))/3 + 1;

    console.log('%s: "%s" { val = %o, voice = %o, pitch = %o, rate = %o }',
      speaker,
      text,
      speakerVal,
      speakerVal % voices.length,
      utterance.pitch,
      utterance.rate
    );

    p = p.then(function() {
      return new Promise(function(resolve, reject) {
        utterance.onend = resolve;
        utterance.onerror = reject;
        speechSynthesis.speak(utterance);
      });
    }).catch(console.error);
  }

  function speakMsg(node) {
    var container, text, speaker;
    node = $(node);
    if (node.is(':visible')) {
      container = node.closest($containerSelector.val());
      text = container.find($textSelector.val()).last().clone();
      speaker = container.find($speakerSelector.val()).last();

      text.find('img[alt]').each(function() {
        this.parentNode.replaceChild(document.createTextNode(this.getAttribute('alt')), this);
      });

      speak(text.text(), speaker.text());
    }
  }

  $(function() {
    $('<div style="'+
        'position: absolute;'+
        'z-index: 100000;'+
        'top: 0;'+
        'left: 0;'+
        'text-align: left;'+
      '"></div>')
      .append($('<button type="button" data-show-settings="0">TTS&gt;</button>')
        .on('click', function() {
          var $this = $(this);
          var showSettings = !$this.data('show-settings');
          $this.data('show-settings', showSettings);
          if (showSettings) {
            $this.nextAll().show();
            $this.text('TTS<');
          } else {
            $this.nextAll().hide();
            $this.text('TTS>');
          }
        }))
      .append($('<span />')
        .append($volume)
        .append(
          '<span style="'+
            'background-color: #FFF;'+
            'color: #000;'+
            'font-family: monospace;'+
          '">'+ ($volume.val() * 100).toFixed(1) +'%</span>')
        .hide())
      .append($containerSelector.hide())
      .append($speakerSelector.hide())
      .append($textSelector.hide())
      .appendTo('body');

    setTimeout(function() {
      new MutationObserver(function(mutations) {
        try {
          for (var i = 0; i < mutations.length; i++) {
            for (var j = 0; j < mutations[i].addedNodes.length; j++) {
              speakMsg(mutations[i].addedNodes[j]);
            }
          }
        } catch (e) {
          console.error(e);
        }
      }).observe(document.body, {
        childList: true,
        subtree: true
      });

      speak('ready');
    }, 3000);
  });
})(window);