AngularJS Filter that convert Seconds to Time String

angularjs-seconds-to-time.js

app.filter('secondsToDateTime', [function() {
    /**
     * This code returns a date string formatted manually.
     * Code "new Date(1970, 0, 1).setSeconds(seconds)" returns malformed output on days.
     * Eg. 4 days, magically becomes 5, 15 becomes 16 and so on...;
     * */
    return function(seconds) {
    var days = Math.floor(seconds/86400);
    var hours = Math.floor((seconds % 86400) / 3600);
    var mins = Math.floor(((seconds % 86400) % 3600) / 60);
    var secs = ((seconds % 86400) % 3600) % 60;
    return (days > 0 ? days+'d ' : '') + ('00'+hours).slice(-2) +':' + ('00'+mins).slice(-2)+':' + ('00'+secs).slice(-2);
    };
}]);