friday.user.js

// ==UserScript==
// @name It's Never Friday
// @description Detects links to Rebecca Black's Friday
// @version 1.2.0
// @include *://chat.meta.stackoverflow.com/rooms/*
// @include *://chat.meta.stackexchange.com/rooms/*
// @include *://chat.stackexchange.com/rooms/*
// @include *://chat.stackoverflow.com/rooms/*
// @include *://chat.askubuntu.com/rooms/*
// @run-at document-end
// ==/UserScript==

function livequery(e){
    e.extend(e.fn,{
        livequery:function(t,i,n){
            var s, r=this;
            return e.isFunction(t)&&(n=i,i=t,t=void 0),
            e.each(e.livequery.queries, function(e,u){
                return r.selector!=u.selector||r.context!=u.context||t!=u.type||i&&i.$lqguid!=u.fn.$lqguid||n&&n.$lqguid!=u.fn2.$lqguid?void 0:(s=u)&&!1
            }), s=s||new e.livequery(this.selector,this.context,t,i,n), s.stopped=!1,s.run(), this
        }, expire:function(t,i,n){
            var s=this;
            return e.isFunction(t)&&(n=i,i=t,t=void 0),
            e.each(e.livequery.queries,function(r,u){
                s.selector!=u.selector||s.context!=u.context||t&&t!=u.type||i&&i.$lqguid!=u.fn.$lqguid||n&&n.$lqguid!=u.fn2.$lqguid||this.stopped||e.livequery.stop(u.id)
            }), this
        }
    }), e.livequery=function(t,i,n,s,r){
        return this.selector=t,this.context=i,this.type=n,this.fn=s,this.fn2=r,this.elements=[],this.stopped=!1,this.id=e.livequery.queries.push(this)-1,s.$lqguid=s.$lqguid||e.livequery.guid++,r&&(r.$lqguid=r.$lqguid||e.livequery.guid++),this
    }, e.livequery.prototype={
        stop:function(){
            var e=this;this.type?this.elements.unbind(this.type,this.fn):this.fn2&&this.elements.each(function(t,i){e.fn2.apply(i)}),this.elements=[],this.stopped=!0
        }, run:function(){
            if(!this.stopped){
                var t=this, i=this.elements, n=e(this.selector,this.context), s=n.not(i);
                this.elements=n, this.type?(s.bind(this.type,this.fn), i.length>0&&e.each(i,function(i,s){e.inArray(s,n)<0&&e.event.remove(s,t.type,t.fn)})):(s.each(function(){t.fn.apply(this)}), this.fn2&&i.length>0&&e.each(i,function(i,s){e.inArray(s,n)<0&&t.fn2.apply(s)}))
            }
        }
    }, e.extend(e.livequery,{
        guid:0,queries:[],queue:[],running:!1,timeout:null,
        checkQueue:function(){
            if(e.livequery.running&&e.livequery.queue.length)
                for(var t=e.livequery.queue.length;t--;)
                    e.livequery.queries[e.livequery.queue.shift()].run()
        }, pause:function(){
            e.livequery.running=!1
        }, play:function(){
            e.livequery.running=!0,e.livequery.run()
        }, registerPlugin:function(){
            e.each(arguments,function(t,i){
                if(e.fn[i]){
                    var n=e.fn[i];
                    e.fn[i]=function(){
                        var t=e, i=n.apply(this,arguments);
                        return t.livequery.run(),i
                    }
                }
            })
        }, run:function(t){
            void 0!=t?e.inArray(t,e.livequery.queue)<0&&e.livequery.queue.push(t):e.each(e.livequery.queries,function(t){e.inArray(t,e.livequery.queue)<0&&e.livequery.queue.push(t)}),e.livequery.timeout&&clearTimeout(e.livequery.timeout),e.livequery.timeout=setTimeout(e.livequery.checkQueue,20)
        }, stop:function(t){
            void 0!=t?e.livequery.queries[t].stop():e.each(e.livequery.queries,function(t){e.livequery.queries[t].stop()})
        }
    }), e.livequery.registerPlugin("append","prepend","after","before","wrap","attr","removeAttr","addClass","removeClass","toggleClass","empty","remove","html"), e(function(){e.livequery.play()})
}

function inject(){
    for(var e=0;e<arguments.length;++e){
        if("function"==typeof arguments[e]){
            var t=document.createElement("script");
            t.type="text/javascript", t.textContent="("+arguments[e].toString()+")(jQuery)", document.body.appendChild(t)
        }
    }
}

inject(livequery,function(e){
    function t(t){
        void e.bjax({
            url:t.attr("href"), type:"GET",redirect:!0,
            success:function(i){
                i.responseText.indexOf("Rebecca Black")>-1?(console.log(t.attr("href")+"Looks like an RB link!"),t.css("color","#f00 !important"),t.html("CAUTION: REBECCA BLACK LINK ("+t.html()+")")):(console.log("trying "+t.attr("href")+" again"),e.bjax({url:t.attr("href"),type:"GET",
                success:function(e){
                    e.responseText.indexOf("Rebecca Black")>-1&&(console.log(t.attr("href")+"Looks like an RB link!"),t.css("color","#f00 !important"),t.html("CAUTION: REBECCA BLACK LINK ("+t.html()+")"))
                }, error:function(){console.log("fail")}}))
            }, error:function(){console.log("fail")}
        })
    }
    // checks star list
    function i(){
        e("li").each(function(){e(this).hasClass("checked")||(e(this).addClass("checked"),
        e(this).find("a").length>0&&e(this).find("a").each(function(){t(e(this))}))})
    }
    // checks messages
    function n(){
        e(".message").each(function(){e(this).hasClass("checked")||(e(this).addClass("checked"),
        e(this).find(".content").first().find("a").length>0&&e(this).find(".content").first().find("a").each(function(){t(e(this))}))})
    }
    e.bjax=function(e){
        function t(e){
            return!s.test(e)&&/:\/\//.test(e)
        }
        var i=location.protocol,n=location.hostname,s=RegExp(i+"//"+n),
        r="http"+(/^https/.test(i)?"s":"")+"://query.yahooapis.com/v1/public/yql?callback=?",u="use 'http://www.datatables.org/javascript/execute.xml' as j; select * from j  where code='response.object = y.rest(\"{URL}\").followRedirects(true).get();'",o="use 'http://www.datatables.org/javascript/execute.xml' as j; select * from j  where code='response.object = y.rest(\"{URL}\").followRedirects(false).get();'";
        return function(i){
            var n=i.url;
            if(/get/i.test(i.type)&&!/json/i.test(i.dataType)&&t(n)){
                i.url=r,i.dataType="json";
                var s=i.redirect?u:o;
                i.data={
                    q:s.replace("{URL}",n+(i.data?(/\?/.test(n)?"&":"?")+jQuery.param(i.data):"")),format:"xml"
                }, !i.success&&i.complete&&(i.success=i.complete,delete i.complete),
                i.success=function(e){
                    return function(t){
                        e&&e.call(this,{res:t,responseText:(t.results[0]||"").replace(/<script[^>]+?\/>|<script(.|\s)*?\/script>/gi,"")},"success")
                    }
                }(i.success)
            }
            return e.apply(this,arguments)
        }
    }
    (e.ajax),e(document).ready(function(){
        var t=setInterval(function(){e(".message").length>0&&(n(),e("#chat .message").livequery(n),e("#starred-posts li").livequery(i),clearInterval(t))},500)
    })
});