Stack Exchange, Winterbash, Hat Overflow

hatoverflow.user.js

// ==UserScript==
// @name        Stack Exchange, Winterbash, Hat Overflow
// @description Adds how many Winterbash hats each user has, into the "signature blocks" of posts.
// @match       *://*.askubuntu.com/*
// @match       *://*.mathoverflow.net/*
// @match       *://*.onstartups.com/*
// @match       *://*.serverfault.com/*
// @match       *://*.stackapps.com/*
// @match       *://*.stackexchange.com/*
// @match       *://*.stackoverflow.com/*
// @match       *://*.superuser.com/*
// @require     http://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js
// @require     https://gist.github.com/raw/2625891/waitForKeyElements.js
// @grant       GM_addStyle
// @grant       GM_xmlhttpRequest
// @version     2.4
// @history     2.4 Update icon image and check against WB 2015.
// @history     2.3 Add support for pre Winterbash countdown.
// @history     2.2 Warn user when Winterbash site is off (Hard 404).
// @history     2.1 Stop script when Winterbash not in season (rough check).
// @history     2.0 Enabled for all pages with standard user signatures, not just Q and A posts.
// @history     1.2 Fixed problem with site metas.
// @history     1.1 Better scanability of count display
// @history     1.0 Initial release
// @updateURL   https://gist.github.com/BrockA/d54dfda1c9ba7434209d/raw/hatoverflow.user.js
// @downloadURL https://gist.github.com/BrockA/d54dfda1c9ba7434209d/raw/hatoverflow.user.js
// ==/UserScript==
var cntDwnIcon      = "//i.stack.imgur.com/O02fU.png";  //-- white 48px
var usrWB_Icon      = "//i.stack.imgur.com/ubhII.png";  //-- gray 28px
var usrWB_Icon      = "//i.stack.imgur.com/otFAt.png";  //-- gray 14px

var zDateObj        = new Date ();
var monthNow        = zDateObj.getMonth ();

//--- If out of Winterbash season (Dec to Jan), abort script.
if (monthNow !== 11  &&  monthNow !== 0)
    return;

var storePrefix     = "WBU_";
var userRegEx       = new RegExp ('^' + storePrefix + '\\d+$', 'i');
var hatCounts       = {}; //--  [WBU_<userid>: hatCount]
var timeNow         = Math.round ( ( zDateObj.getTime () ) / 1000);
var timeExpire      = timeNow - 7200;
var baseAPI_Link    = determineAPI_BaseLink ();

function determineAPI_BaseLink () {
    /*--- Fetch hat data.
        Like http://winterbash2014.stackexchange.com/api/user-hats?userId=262509&host=meta.stackexchange.com
    */
    var apiDomain   = location.hostname.replace (/^meta\.(.+)$/i, "$1");
    if (apiDomain  == "stackexchange.com")
        apiDomain   = "meta.stackexchange.com";

    //-- Winterbash season runs from Dec to Jan.
    var tYear       = zDateObj.getFullYear ();
    if (monthNow === 0)
        tYear--;

    var baseLink    = 'http://winterbash' + tYear + '.stackexchange.com/api/user-hats?host='
                    + apiDomain + '&userId='
                    ;
    return baseLink;
}

//--- Get data and flush expired.
for (var J = localStorage.length - 1;  J >= 0;  --J) {
    var itemName    = localStorage.key (J);

    if (userRegEx.test (itemName) ) {
        var usrData = localStorage.getItem (itemName);
        if (usrData)
            usrData = JSON.parse (usrData);
        else
            continue;

        var timeStd = parseInt (usrData[1], 10);
        if (timeStd < timeExpire)
            localStorage.removeItem (itemName);
        else
            hatCounts[itemName] = usrData[0];
    }
}

//--- Get and place hat counts.
waitForKeyElements (".post-signature", processUserSignature);

function processUserSignature (jNode) {
    var userID  = 0;
    var userLnk = jNode.find (".user-details > a");
    if (userLnk.length)
        userID  = parseInt (userLnk[0].href.replace (/^.+?\/users\/([-\d]+)\/.+$/, "$1"), 10); // -1 == Community account

    var userKey = storePrefix + userID;
    var numHats = hatCounts[userKey];

    var insPnt  = jNode.find (".reputation-score");
    insPnt.append (' <span class="gmWBstar"></span> <span>??</span>');
    var rezDisp = jNode.find (".gmWBstar + span");

    if (typeof numHats !== "undefined") {
        rezDisp.text (numHats);
    }
    else if (rezDisp.length) {
        var userHatLink = baseAPI_Link + userID;
        GM_xmlhttpRequest ( {
            method:     'GET',
            url:        userHatLink,
            context:    { k: userKey, nd: rezDisp[0] },
            onload:     updateHatCountForA_User,
            onabort:    reportAJAX_Error,
            onerror:    reportAJAX_Error,
            ontimeout:  reportAJAX_Error
        } );
    }
}

function updateHatCountForA_User (rspObj) {
    if (rspObj.status != 200  &&  rspObj.status != 304) {
        reportAJAX_Error (rspObj);
        return;
    }
    var numHats     = 0;
    try {
        var hatArray = JSON.parse (rspObj.responseText);
    }
    catch (err) {
        //--- Not valid JSON, is countdown timer present?
        var msToStart   = rspObj.responseText.match (/countdown.+?getTime.+?(\d+)/);
        if (msToStart  &&  msToStart.length > 1) {
            msToStart   = parseInt (msToStart[1], 10);
            if (msToStart > 0) {
                var secsToStart = Math.round (msToStart / 1000);
                var hrsToStart  = Math.floor (secsToStart / 3600);
                var minsToStart = Math.round ( (secsToStart - 3600 * hrsToStart) / 60 );
                var dispCntDwn  = hrsToStart + ':' + ("0" + minsToStart).slice (-2);  //-- zero pad minutes

                $(rspObj.context.nd).prev (".gmWBstar").addBack ().remove ();
                var cdDispNode  = $("#gmWbCdDisp");
                if (cdDispNode.length === 0)
                    cdDispNode  = $(
                        '<div id="gmWbCdDisp" title="Countdown to Winter Bash start"><img src="' + cntDwnIcon + '"><span></span></div>'
                    ).appendTo ("body");

                cdDispNode.find ("span").text (dispCntDwn);

                return;
            }
        }
        console.error (err);
        return;
    }
    if ( ! Array.isArray (hatArray) ) {
        console.error ('GM: Error: Unexpected result from Winterbash API.', rspObj.responseText.substr (0,80) + "..." );
    }
    else {
        numHats     = hatArray.length;
        // FUTURE: Maybe get names and pics of hats for flyover display.?
    }

    var userKey     = rspObj.context.k;
    var ndToChnge   = rspObj.context.nd;

    //--- Update array and storage.
    hatCounts[userKey]  = numHats;
    var usrData         = JSON.stringify ( [numHats, timeNow] );
    localStorage.setItem (userKey, usrData);

    ndToChnge.textContent = numHats;
}


function reportAJAX_Error (rspObj) {
    if (rspObj.response  &&  /Site not found: winterbash/i.test (rspObj.response) ) {
        if ( $("body > h2.gmWBerror").length === 0) {
            $("body").prepend ('<h2 class="gmWBerror">The Winterbash site is off. Update or disable this "Hat Overflow" script.</h2>');
        }
    }
    console.error ('GM: Error: ' + rspObj.status + '! &nbsp; "' + rspObj.statusText + '".');
}


GM_addStyle ( multilineStr ( function () { /*!
    .gmWBstar {
        background:         url("\/\/i.stack.imgur.com/otFAt.png");
        display:            inline-block;
        height:             15px;
        vertical-align:     top;
        width:              14px;
    }
    .gmWBstar + span {
        margin:             auto 0.5ex auto -0.4ex;
    }
    .gmWBerror {
        background:         red;
        color:              black;
    }
    #gmWbCdDisp {
        position:           absolute;
        top:                0;
        right:              1ex;
        background:         black;
        color:              white;
    }
    #gmWbCdDisp > img {
        height:             20px;
        width:              20px;
        margin:             1ex 1ex 0 0;
    }
    #gmWbCdDisp > span {
        font-weight:        bold;
        vertical-align:     super;
    }
*/} ) );

function multilineStr (dummyFunc) {
    var str = dummyFunc.toString ();
    str     = str.replace (/^[^\/]+\/\*!?/, '') // Strip function() { /*!
            .replace (/\s*\*\/\s*\}\s*$/, '')   // Strip */ }
            .replace (/\/\/.+$/gm, '') // Double-slash comments wreck CSS. Strip them.
            ;
    return str;
}