StackExchange April Fools unobfuscated

StackExchange.adviza = (function () {
    var questionId, leftBeforePopup, minReadingMs;
    var timeDef, scrollDef, neverAnswerDef, letsPopDef;
    var everPoppedUp, initialized;

    var now = Date.now || function () { return new Date().getTime() };

    function set(key, val) {
        localStorage.setItem("adviza:" + key, val);
    }
    function getInt(key) {
        return parseInt(localStorage.getItem("adviza:" + key), 10) || 0;
    }
    function timeSince(key) {
        return now() - getInt(key);
    }

    function init(qid, minReadingSeconds, chancePercent, ignoreDate) {
        if (initialized)
            return;
        initialized = true;
        if (getInt("leavemealone"))
            return;
        if (!ignoreDate && new Date().getDate() !== 1)
            return;
        if ("ontouchstart" in window)
            return;

        try {
            localStorage.setItem("adviza:testing", "iflocalstorageisworkingonthisbrowser");
            localStorage.removeItem("adviza:testing");
        } catch (e) {
            return;
        }

        if (!window.postMessage)
            return;

        questionId = qid;

        // Yes, dear person reading this, there's a secret trigger. But you'll have to
        // work a little bit to find out what it is.
        $("#search input").blur(function () {
            var s = $(this).val();
            var v = s.length;
            for (var i=0; i < s.length; i++)
                v = (v * (s.charCodeAt(i) % 256)) % 5113;
            if (v != 5051)
                return;

            popup();
        });

        timeDef = $.Deferred();
        scrollDef = $.Deferred();
        neverAnswerDef = $.Deferred(); // will be rejected when the user focuses the answer box

        $.when(timeDef, scrollDef, neverAnswerDef).done(function () {
            if (timeSince("lastpopup") < 10 * 60 * 1000)
                return;
            if (timeSince("lastchat") < 30 * 60 * 1000)
                return;
            if (chancePercent >= 100 || Math.random() * 100 >= chancePercent)
                popup();
        });

        $.when(timeDef, scrollDef).done(function () {
            neverAnswerDef.resolve(); // note that this has no effect if it was rejected previously
        });

        $("#wmd-input").one("focus", function () {
            neverAnswerDef.reject();
        });

        leftBeforePopup = minReadingMs = minReadingSeconds * 1000;
        $(window).on("focus", focus);
        $(window).on("blur", blur);
        if (!document.hasFocus || document.hasFocus())
            focus();

        var lastAnswer = $("#answers .answer:last");
        if (!lastAnswer.length || lastAnswer.offset().top < $(window).scrollTop() + $(window).height())
            scrollDef.resolve();
        else
            $(window).one("scroll", function () { scrollDef.resolve() });
    }

    var readingTimeout, lastTimeoutStart, lastBlur;
    function focus() {
        if (readingTimeout)
            clearTimeout(readingTimeout);
        if (lastBlur && now() - lastBlur > minReadingMs) {
            leftBeforePopup = minReadingMs;
        }
        lastBlur = null;
        lastTimeoutStart = now();
        readingTimeout = setTimeout(function() {
            timeDef.resolve();
            $(window).off("focus", focus);
            $(window).off("blur", blur);
        }, leftBeforePopup);
    }
    function blur() {
        if (readingTimeout)
            clearTimeout(readingTimeout);
        if (lastTimeoutStart) {
            leftBeforePopup -= now() - lastTimeoutStart;
            lastTimeoutStart = null;
        }
        lastBlur = now();
    }

    function delay(ms) {
        var waiter = $.Deferred();
        setTimeout(function () { waiter.resolve(); }, ms);
        return function(data) {
            var result = $.Deferred();
            waiter.done(function () { result.resolve(data); });
            return result;
        }
    }

    function popup() {
        if (everPoppedUp)
            return;
        everPoppedUp = true;
        set("lastpopup", now());
        ensureStyle();
        var box = $("<div id='adviza-box'/>").css("width", 0).appendTo("body");

        var stat = $("<div id='adviza-status' >").appendTo(box);
        $("<img width=34 height=34 src='http://i.stack.imgur.com/owly4.png'/>").appendTo(stat);
        var statspan = $("<span />").text("chat with an expert").appendTo(stat).addClass("hoverable");
        var nope = $("<div id='no-adviza'><span>not now</span><br/><span>never</span></div>")
            .appendTo(box).find("span").addClass("hoverable").click(function () {
                if (/never/.test($(this).text()))
                    set("leavemealone", 1);
                box.remove();
            }).hide();

        box.animate({width: 380}, function () { nope.fadeIn() });

        statspan.one("click", function () {
            nope.remove();
            statspan.html("checking available experts").removeClass("hoverable").addSpinnerAfter({"margin-left": "10px"});
            $.post("/adviza/create-session/" + questionId, { fkey: StackExchange.options.user.fkey })
                .pipe(delay(1500), delay(1500))
                .done(function (data) {
                    if (data && data.iframe)
                        insertIframe(box, stat, data.iframe, failed);
                    else
                        failed();
                }).fail(failed);

            function failed(text)
            {
                StackExchange.helpers.removeSpinner();
                statspan.text(text || "Sorry, no expert is available.");
                $("<div id='no-adviza'><span class='hoverable'>close</span></div>")
                    .appendTo(box).click(function () {
                        box.remove();
                });
            }

        });

    }

    function insertIframe(box, stat, url, failed)
    {
        var origin = url.replace(/^(http:\/\/[^\/]+)\/.*$/, "$1");
        var iframeLoading = $.Deferred();

        var iframe = $("<iframe width=380 height=280 />")
            .attr("src", url)
            .attr("id", "adviza-iframe")
            .attr("frameborder", "0")
            .css({left: 400, position: "relative"})
            .appendTo(box);

        stat.find("span").html("connecting you to an expert");

        var timeout = setTimeout(function () {
            iframe.remove();
            failed("Sorry, no expert responded.")
        }, 10000);

        iframeLoading.pipe(delay(2000)).done(function () {
            iframe.animate({left: 0});
            box.animate({height: 280});
            stat.animate({top: -44}, function () {stat.remove(); });
        });

        $(window).on("message", messageHandler);

        function messageHandler(evt) {
            evt = evt.originalEvent;
            if (evt.origin !== origin)
                return;
            if (!evt.data)
                return;

            if (evt.data === "close") {
                $(window).off("message", messageHandler);
                iframe.animate({left: -400});
                box.animate({height: 34}).animate({width: 0, paddingLeft:0, paddingRight: 0}, function () { box.remove(); });
            } else if (evt.data === "loaded") {
                iframeLoading.resolve();
                clearTimeout(timeout);
                set("lastchat", now());
            }
        }

    }

    var styleInserted = false;
    function ensureStyle()
    {
        if (styleInserted)
            return;
        var CSS =
            "#adviza-box {" +
                "position: fixed; width: 380px; height: 34px; bottom: 100px; right: 100px;" +
                "right: calc((100% - 1020px)/2); right: -webkit-calc((100% - 1020px)/2)" +
                "border: 2px solid black; background: black;" +
                "background-color: rgba(0, 0, 0, .85); padding: 8px; overflow: hidden; font-family: sans-serif" +
            "}" +
            "#adviza-status {" +
                "height: 0; overflow: visible; text-align: left; line-height: 34px; font-size: 22px;" +
                "color: white; position: relative" +
            "}" +
            "#adviza-status > * {" +
                "vertical-align: middle;" +
            "}" +
            "#no-adviza {" +
                "color: white; float: right; line-height: 17px; font-size: 12px; text-align: right"+
            "}" +
            "#adviza-box .hoverable {" +
                "cursor: pointer;" +
            "}" +
            "#adviza-box .hoverable:hover {" +
                "color: #cfa;" +
            "}";

        var sheet = $("<style type='text/css' />").appendTo("head");
        if (sheet[0].styleSheet) // IE 8 pukes when you just set the text on the dom element
            sheet[0].styleSheet.cssText = CSS;
        else
            sheet.text(CSS);
        styleInserted = true;

    }

    return { init: init }
})()