schedule events in a chatroom

rough-scheduler.js

// ==UserScript==
// @name         add multiple events
// @namespace    http://stackoverflow.com/users/578411/rene
// @version      0.1
// @description  Event creator
// @author       rene
// @match        http://chat.stackoverflow.com/rooms/info/*
// @grant        none
// ==/UserScript==
/* jshint -W097 */
/*global confirm:true, console:true, fkey:true, $:true */
'use strict';

var emulate = true,
    dur = 60, // minutes
    room,
    schedules = [];

Date.prototype.addDays = function(days)
{
    var dat = new Date(this.valueOf());
    dat.setDate(dat.getDate() + days);
    return dat;
};

function numasstr(n) {
    var num = '0' + n.toString();
    return num.substring(num.length - 2);
}

function formatDate(next) {
    return next.getUTCFullYear() + '/' + numasstr(next.getUTCMonth()+1)+'/' + numasstr(next.getUTCDate());
}

function formatTime(next) {
    return numasstr(next.getUTCHours()) + ':' + numasstr(next.getUTCMinutes());
}

function makeitUTC(d) {
    var uyr = d.getUTCFullYear(),
        umo = d.getUTCMonth(),
        uda = d.getUTCDate(),
        uhr = d.getUTCHours(),
        umi = d.getUTCMinutes();

    console.log(new Date(Date.UTC(uyr,umo,uda,uhr,umi,0)));
}

function findNextDate(d, desc) {
    var next = new Date(d.getFullYear(), d.getMonth(), d.getDate()).addDays(6),
        endMonth = next.getMonth() + 1;
    while(next.getMonth() < endMonth) {
        for(;next.getDay() === 0 || next.getDay() === 6;next=next.addDays(-1));
        console.log(next);
        next.setHours(d.getHours());
        next.setMinutes(d.getMinutes());
        schedules.push({ datetime:next, desc: desc});
        next = next.addDays(6);
    }
}

function buildDOM() {
    $('li.meeting').each(function() {
        var _this = $(this),
            md = $(_this[0]).find('div.meeting-details span[data-time]'),
            gen = $('<div></div>'),
            emu = $('<input type="checkbox" />'),
            emucnt = $('<label>emulate</label>'),
            a = $('<a></a>'),
            dt = new Date(parseInt(md.attr('data-time'), 10) * 1000), // date and time
            desc = _this.find('h3')[0].childNodes[0].nodeValue; // description

        console.log(desc);
        gen.append(emucnt);
        emucnt.append(emu);
        emu.prop('checked', emulate);
        emu.on('change', function() { var emuval = $(this); emulate = emuval.prop('checked'); });
        gen.append(a);
        a.text('Generate next events');
        a.prop('href', '#');
        a.on('click', function(event) { event.preventDefault();  findNextDate(dt, desc); a.hide(); processSchedule(); });
        _this.append(gen);
    });
}

function processSchedule() {
    var int_hnd = window.setInterval(function () {
        var sched  = schedules.shift();
        if (sched !== undefined) {
            if (emulate) {
                console.log({
                    url: '/rooms/schedule/add/'+ room.toString(),
                    fkey: fkey().fkey,
                    description: sched.desc,
                    firstDate: formatDate(sched.datetime),
                    firstTime: formatTime(sched.datetime),
                    duration: dur,
                    recur: '',
                    expiry: ''
                });
            } else {
                $.post('/rooms/schedule/add/'+ room.toString(), {
                    fkey: fkey().fkey,
                    description: sched.desc,
                    firstDate: formatDate(sched.datetime),
                    firstTime: formatTime(sched.datetime),
                    duration: dur,
                    recur: '',
                    expiry: ''
                }, function() {console.log('OK: ' + sched);});
            }
        } else {
            window.clearInterval(int_hnd);
            console.log('all done!');
        }
    }, 5000);
    console.log('processing...');
}

function init() {
    var re = /(?:\w|[.\/:])*\/rooms\/info\/(\d+)\/((\w|[-])+)\?tab=(\w+)/,
        matches = re.exec(window.location.href);  // test room

    console.log(matches);

    if (matches.length>0) {
        room = parseInt(matches[1],10);
        console.log(room);
        buildDOM();
    } else {
        window.alert('you\'re not on a schedule');
    }
}
init();