// ==UserScript==
// @name        ii-distractalert
// @namespace   http://thedarkworld.net/projects/ii-distractnotify/
// @description Pops up a Desktop Notification when you have a new Distraction. Also plays the sound of a Chatot. Because Chatot are cute.
// @include     http://www.improbableisland.com/*
// @include     http://improbableisland.com/*
// @version     1
// ==/UserScript==


localStorage["iida-lastupdate"] = localStorage["iida-lastupdate"] || "0";

function runUpdate() {
    var ifr;
    ifr = document.createElement('iframe');
    ifr.style.display = "none";
    document.body.appendChild(ifr);
    ifr.onload = function() {
        var l;
        l = ifr.contentDocument.querySelectorAll(".trlight input[type=checkbox][name='markedmessages[]']").length;
        if( l > 0) {
            notifyUser(l);
        }
    };
    ifr.src = "/mail.php";
}

function notifyUser(cnt) {
    notifyUser.cntcache = notifyUser.cntcache || 0;
    if( !notifyUser.snd) {
        notifyUser.snd = document.createElement('audio');
        notifyUser.snd.src = "http://static.pokefarm.org/_mp3/cries/441.mp3";
    }
    if( notifyUser.cntcache < cnt) {
        if( notifyUser.notify) notifyUser.notify.close();
        notifyUser.notify = webkitNotifications.createNotification("","New distraction! ("+location.hostname+")","You have "+(cnt==1?"a Distraction":cnt+" Distractions")+"!");
        notifyUser.notify.onclick = function() {window.open('/mail.php');};
        notifyUser.notify.show();
        notifyUser.snd.play();
    }
    if( cnt == 0 && notifyUser.notify) notifyUser.notify.close();
    notifyUser.cntcache = cnt;
}

function startPolling() {
    setInterval(function() {
        var lastupdate, now;
        lastupdate = parseInt(localStorage["iida-lastupdate"],10);
        now = Date.now();
        if( lastupdate+10000 < now) { // 10 second intervals across all tabs - magic!
            localStorage["iida-lastupdate"] = now;
            runUpdate();
        }
    },1000);
}

function askForPermission() {
    var div, a;
    div = document.createElement('div');
    div.style.cssText = "position:fixed;left:8px;top:8px;background:black;color:white;border:1px solid white;padding:4px";
    div.appendChild(document.createElement('p')).appendChild(document.createTextNode("You need to grant permissions for notifications to work."));
    a = div.appendChild(document.createElement('p')).appendChild(document.createElement('a'));
    a.appendChild(document.createTextNode("Click here"));
    a.style.color = "#3cf";
    a.href = "#";
    a.onclick = function() {
        document.body.removeChild(div);
        webkitNotifications.requestPermission(startPolling);
        return false;
    };
    document.body.appendChild(div);
}

if( webkitNotifications.checkPermission()) {askForPermission();}
else {startPolling();}