Turns the Twitch chat into a civilized chat room by removing spam, all caps messages, repeated phrases, repeated messages, banned messages, repeated letters and more.
// ==UserScript==
// @name Civilized Twitch Chat
// @description Turns the Twitch chat into a civilized chat room by removing spam, all caps messages, repeated phrases, repeated messages, banned messages, repeated letters and more.
// @version 0.2.1
// @author Sewil
// @match *://*.twitch.tv/*
// @require http://code.jquery.com/jquery-latest.min.js
// @namespace https://greasyfork.org/users/14470
// ==/UserScript==
/*
* arrive.js
* v2.2.0
* https://github.com/uzairfarooq/arrive
* MIT licensed
*
* Copyright (c) 2014-2015 Uzair Farooq
*/
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b){a.forEach(function(a){var d=a.addedNodes,f=a.target,e=[];null!==d&&0<d.length?p(d,b,e):"attributes"===a.type&&r(f,b,e);t(e)})}function y(a,b){a.forEach(function(a){a=a.removedNodes;var d=[];null!==a&&0<a.length&&p(a,b,d);t(d)})}function z(a){var b={attributes:!1,childList:!0,subtree:!0};a.fireOnAttributesModification&&(b.attributes=!0);return b}function A(a){return{childList:!0,subtree:!0}}function k(a){a.arrive=l.bindEvent;e.addMethod(a,"unbindArrive",l.unbindEvent);e.addMethod(a,"unbindArrive",
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return{matchesSelector:function(b,c){return b instanceof HTMLElement&&a.call(b,c)},addMethod:function(a,c,d){var f=a[c];a[c]=function(){if(d.length==arguments.length)return d.apply(this,arguments);if("function"==typeof f)return f.apply(this,arguments)}}}}(),B=function(){var a=function(){this._eventsBucket=[];this._beforeRemoving=this._beforeAdding=null};a.prototype.addEvent=function(a,c,d,f){a={target:a,selector:c,options:d,callback:f,firedElems:[]};this._beforeAdding&&this._beforeAdding(a);this._eventsBucket.push(a);
return a};a.prototype.removeEvent=function(a){for(var c=this._eventsBucket.length-1,d;d=this._eventsBucket[c];c--)a(d)&&(this._beforeRemoving&&this._beforeRemoving(d),this._eventsBucket.splice(c,1))};a.prototype.beforeAdding=function(a){this._beforeAdding=a};a.prototype.beforeRemoving=function(a){this._beforeRemoving=a};return a}(),u=function(a,b,c){function d(a){"number"!==typeof a.length&&(a=[a]);return a}var f=new B,e=this;f.beforeAdding(function(b){var d=b.target,h;if(d===n.document||d===n)d=
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return!1})};this.unbindEventWithSelectorOrCallback=function(a){var b=d(this);f.removeEvent("function"===typeof a?function(c){for(var d=0;d<b.length;d++)if(c.target===b[d]&&c.callback===a)return!0;return!1}:function(c){for(var d=0;d<b.length;d++)if(c.target===b[d]&&c.selector===a)return!0;return!1})};this.unbindEventWithSelectorAndCallback=function(a,b){var c=d(this);f.removeEvent(function(d){for(var e=0;e<c.length;e++)if(d.target===c[e]&&d.selector===a&&d.callback===b)return!0;return!1})};return this},
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/* */
var bannedMessages = [ 'LUL' ];
var bannedPhrases = [ '୧༼ಠ益ಠ༽୨' ];
var messages = {};
var allowedEmoticons = {':D':true, ':)':true};
var capsLimit = 0.5;
var capsOffset = 5;
var r9kcooldown = 120000; // ms
var r9klimit = 5;
var r9koffset = 0;
var repeatedPhrasesOffset = 0;
var repeatedPhrasesLimit = 5;
var repeatedLettersLimit = 5;
$(document).ready(function() {
$(document).arrive('.chat-line, .rechat-chat-line', function() {
removeEmoticons($(this).find('span.message'));
if($(this).find('span.message').html() !== undefined) {
var html = $(this).find('span.message').html().trim();
var lowerHtml = html.toLowerCase();
if(!html || bannedPhrase(lowerHtml) || bannedMessage(lowerHtml) || allCaps(html) || repeatedLetters(html) || repeatedPhrases(html) || repeatedMessage(html)) {
$(this).remove();
} else {
$(this).find('span.message').html(html);
}
} else {
$(this).remove();
}
});
});
function bannedPhrase(str) {
for(var i = 0; i < bannedPhrases.length; i++) {
var phrase = bannedPhrases[i];
if(str.indexOf(phrase) > -1) {
return true;
}
}
return false;
}
function bannedMessage(str) {
for(var i = 0; i < bannedMessages.length; i++) {
var message = bannedMessages[i];
if(str == message.toLowerCase()) {
return true;
}
}
return false;
}
function repeatedMessage(str) {
if(str.length >= r9koffset) {
var lowerStr = str.toLowerCase();
if(messages[lowerStr] === undefined) {
messages[lowerStr] = 1;
}
var timeNow = new Date().getTime();
var notRepeated = messages[lowerStr] < r9klimit;
var cooledDown = r9kcooldown < timeNow - messages[lowerStr];
if(notRepeated || cooledDown) {
if(notRepeated) {
messages[lowerStr]++;
if(messages[lowerStr] == r9klimit) {
messages[lowerStr] = timeNow;
}
} else {
messages[lowerStr] = 1;
}
} else {
return true;
}
}
return false;
}
function repeatedPhrases(str) {
var phrases = str.split(" ");
var arr = {};
for(var i = 0; i < phrases.length; i++) {
var lowerPhrase = phrases[i].toLowerCase();
if(lowerPhrase.length >= repeatedPhrasesOffset) {
if(arr[lowerPhrase] === undefined) {
arr[lowerPhrase] = 1;
} else if(arr[lowerPhrase] < repeatedPhrasesLimit) {
arr[lowerPhrase]++;
} else {
return true;
}
}
}
return false;
}
function repeatedLetters(str) {
var pattern = "(.)";
for(var i = 1; i < repeatedLettersLimit;i++) {
pattern += "\\1";
}
var patt = new RegExp(pattern);
return patt.test(str);
}
function allCaps(str) {
var caps = str.replace(/[^A-Z]/g, "").length;
var percentage = caps / str.length;
return str.length >= capsOffset && percentage >= capsLimit;
}
function removeEmoticons($message) {
var $emoticons = $message.find('img');
$.each($emoticons, function() {
var alt = decodeURIComponent($(this).attr('alt'));
var dr = decodeURIComponent($(this).attr('data-regex'));
if(allowedEmoticons[alt] !== true && allowedEmoticons[dr] !== true) {
$(this).remove();
}
});
}