var currentImageID = "tesco-logo";

function fadeInLogo(newImageID) {
    $(currentImageID).hide();
    $(newImageID).appear();
    currentImageID = newImageID;
}

// Twitter
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);
    if (delta < 60) {
        return 'less than a minute ago';
    }
    else if (delta < 120) {
        return 'about a minute ago';
    }
    else if (delta < (60 * 60)) {
        return (parseInt(delta / 60)).toString() + ' minutes ago';
    }
    else if (delta < (120 * 60)) {
        return 'about an hour ago';
    }
    else if (delta < (24 * 60 * 60)) {
        return 'about ' + (parseInt(delta / 3600)).toString() + ' hours ago';
    }
    else if (delta < (48 * 60 * 60)) {
        return '1 day ago';
    }
    else {
        return (parseInt(delta / 86400)).toString() + ' days ago';
    }
}

function autolink(s) {
    var hlink = /\s(ht|f)tp:\/\/([^ \,\;\:\!\)\(\"\'\<\>\f\n\r\t\v])+/g;
    return (s.replace(hlink, function($0, $1, $2) {
        s = $0.substring(1, $0.length);
        // remove trailing dots, if any
        while (s.length > 0 && s.charAt(s.length - 1) == '.')
            s = s.substring(0, s.length - 1);
        // add hlink
        return " " + s.link(s);
    }));
}

function twitterCallback2(tweets) {
    var statusHTML = "";
    for (var i = 0; i < tweets.length; i++) {
        statusHTML += '<li>' + autolink(tweets[i].text) + '<br /><span>' + relative_time(tweets[i].created_at) + '</span></li>';
    }
    $('twitterList').innerHTML = statusHTML;
    $('twitterLoader').hide();
    $('twitterList').appear();
}