twitchplayspokemon chat toggle

//Here is the full code for the chat toggle buttons script. Feel free to review/compress it yourself; good internet security is important!
// Original code by /u/RenaKunisaki with /u/smog_alado's excellent notes
// Spam button by /u/SRS-SRSLY. Chat Scroll Improvement by /u/schrobby
// Dynamic regular expression and "democracy mode" by /u/red_agent
// Compressed by http://javascriptcompressor.com.
// Passes http://www.jshint.com on default settings

/* global $ : false, CurrentChat : false*/

(function(){
  "use_strict";

  // EDIT THIS IF YOU WANT TO BLOCK SOMETHING ELSE
  var BLOCKED_WORDS = [
      "left",
      "right",
      "up",
      "down",
      "start",
      "select",
      "a",
      "b",
      "democracy",
      "anarchy"
  ];

  var command_regex_src = BLOCKED_WORDS.join("|");

  //Match exactly one of the commands
  var ANARCHY_REGEX = new RegExp("^(" + command_regex_src + ")$", "i");

  //Match a sequence of one or more commands optionaly followed by a number 0-9
  //This includes things like `up2left4` or `start9`
  var DEMOCRACY_REGEX = new RegExp("^((" + command_regex_src + ")\\d?)+$", "i");

  //EDIT THIS TO CHOOSE THE FILTERING MODE
  var FILTER_REGEX = DEMOCRACY_REGEX;


  //Create buttons to toggle the command and non-command chats on and off.
  var CHAT_BUTTON   = $("ul.segmented_tabs li a").first();
  $("<li><a class='CommandsToggle'>Commands</a><a class='ChatToggle'>Talk</a></li>").insertAfter(CHAT_BUTTON);

  // Reduce the width of the chat button by 71px.
  // This gives enough space for a spam button width 30px with 15px margins with an extra pixel of wiggle room
  CHAT_BUTTON.css("width", CHAT_BUTTON.width() - 71);

  $(".CommandsToggle").click(function () {
      $(this).toggleClass("selected");
      $("#chat_line_list").toggleClass("showCmd");
  });

  $(".ChatToggle").click(function () {
      $(this).toggleClass("selected");
      $("#chat_line_list").toggleClass("showTalk");
  });

  // Simulate a click on ChatToggle, so starts in the "on" position
  $(".ChatToggle").click();

  CurrentChat.line_buffer = 800;

  //This part creates a CSS rule
  //that hides all chat messages by default
  $(
      " <style type='text/css' >                     " +
      " .segmented_tabs li li a.CommandsToggle {     " +
      "     width: 50px;                             " +
      "     padding-left: 0px;                       " +
      "     padding-top: 0;                          " +
      "     height: 8px;                             " +
      "     line-height: 115%;                       " +
      " }                                            " +
      "                                              " +
      " .segmented_tabs li li a.ChatToggle {         " +
      "     width: 35px;                             " +
      "     padding-left: 15px;                      " +
      "     padding-top: 0;                          " +
      "     height: 8px;                             " +
      "     line-height: 115%;                       " +
      " }                                            " +
      "                                              " +
      " #chat_line_list li { display:none }          " +  // hide new, uncategorized messages
      " #chat_line_list.showCmd li.cCmd,             " +  // show messages that we know we want to read
      " #chat_line_list.showTalk li.cTalk            " +
      " {                                            " +
      "     display:inline;                          " +
      " }                                            " +
      " </style>                                     "
  ).appendTo("head");

  //Update the chat status periodically
  setInterval(function () {
      // Thus, run for each chat box item,
      $('#chat_line_list li').each(function () {
          var cLine = $(this),
              cText = cLine.find(".chat_line").text();

          //TODO: WHY ARE WE TESTING `cText &&` here?
          if (cText && !cText.trim().match(FILTER_REGEX)) {
              cLine.addClass("cTalk");
          } else {
              cLine.addClass("cCmd");
          }
      });

      //TODO: WHAT DOES THIS LINE DO? SCROLL TO THE BOTTOM?
      if (CurrentChat.currently_scrolling) { CurrentChat.scroll_chat(); }

  }, 100);  // <- number of miliseconds between updates

}());