TwitterCache = {}; 
url = "http://twitter.com/status/user_timeline/FlightpathNY.json?callback=?";
twitterprofile = "http://twitter.com/FlightpathNY/statuses/";
updating = false;

$(document).ready(function(){
    twitterupdate();
    setInterval(twitterupdate,300000);
    setTimeout(settoupdate,5000);
});

function twitterupdate()
{
    twitterarray = '';
    $.getJSON(url, function(data){
        $.each(data, function(i, item) {
            var HTML = '';
            if((i < 7) && !TwitterCache[item.id]) 
            {
                TwitterCache[item.id] = "displayed"; 
                HTML = '<li style="display:none" id="' + item.id + '">' + item.text.linkify() + ' <a class="time" href="' + twitterprofile + item.id + '">' + relative_time(item.created_at) + '</a></li>'; 

                if( HTML !== '' ) 
                {
                    if(updating)
                    {
                        $("#twitter_update_list").prepend( HTML ).find('li:hidden').slideToggle('slow');
                    }
                    else
                    {
                        $("#twitter_update_list").append( HTML ).find('li:hidden').slideToggle('slow');
                    }
                }
            }
            twitterarray[i] = item.id;
            $("#twitter_update_list li:gt(6)").slideToggle('slow', function(){$(this).remove();}); // Removes everything past the 7th tweet
        });
    });
}

String.prototype.linkify = function() 
{
    return this.replace(/[A-Za-z]+:\/\/[A-Za-z0-9-_]+\.[A-Za-z0-9-_:%&\?\/.=]+/, function(m) 
    {
        return m.link(m);
    });
};

function relative_time(time_value) {
    var values = time_value.split(" ");
    time_value = values[1] + " " + values[2] + ", " + values[5] + " " + values[3];
    var parsed_date = Date.parse(time_value);
    var relative_to = (arguments.length > 1) ? arguments[1] : new Date();
    var delta = parseInt((relative_to.getTime() - parsed_date) / 1000);
    delta = delta + (relative_to.getTimezoneOffset() * 60);

    var r = '';
    if (delta < 60) {
        r = 'a minute ago';
    } else if(delta < 120) {
        r = 'couple of minutes ago';
    } else if(delta < (45*60)) {
        r = (parseInt(delta / 60)).toString() + ' minutes ago';
    } else if(delta < (90*60)) {
        r = 'an hour ago';
    } else if(delta < (24*60*60)) {
        r = '' + (parseInt(delta / 3600)).toString() + ' hours ago';
    } else if(delta < (48*60*60)) {
        r = '1 day ago';
    } else {
        r = (parseInt(delta / 86400)).toString() + ' days ago';
    }
    return r;
}

function twitter_callback ()
{
	return true;
}

function settoupdate()
{
	updating = true;
}