function Calendar() {

}

Calendar.prototype.execute = function() {
    var calendar = $('#calendar');

    calendar.fullCalendar({
        lang: $("body").data("js-lang"),
        editable: true,
        eventLimit: true,
        defaultView: "month",
        header: {
            left: 'prev,next today',
            center: 'title',
            right: 'month,agendaWeek,agendaDay'
        },
        eventDrop: function(event) {
            $.ajax({
                cache: false,
                url: calendar.data("save-url"),
                contentType: "application/json",
                type: "POST",
                processData: false,
                data: JSON.stringify({
                    "task_id": event.id,
                    "date_due": event.start.format()
                })
            });
        },
        viewRender: function() {
            var url = calendar.data("check-url");
            var params = {
                "start": calendar.fullCalendar('getView').start.format(),
                "end": calendar.fullCalendar('getView').end.format()
            };

            for (var key in params) {
                url += "&" + key + "=" + params[key];
            }

            $.getJSON(url, function(events) {
                calendar.fullCalendar('removeEvents');
                calendar.fullCalendar('addEventSource', events);
                calendar.fullCalendar('rerenderEvents');
            });
        }
    });
};