$(document).ready(function() {
    // ... All the calendar functionality

    $('#appointment_update').click(function(e) {
        e.preventDefault();
        var data = {
            _token: '{{ csrf_token() }}',
            appointment_id: $('#appointment_id').val(),
            start_time: $('#start_time').val(),
            finish_time: $('#finish_time').val(),
        };

        $.post('{{ route('admin.appointments.ajax_update') }}', data, function( result ) {
            $('#calendar').fullCalendar('removeEvents', $('#event_id').val());

            $('#calendar').fullCalendar('renderEvent', {
                title: result.appointment.client.first_name + ' ' + result.appointment.client.last_name,
                start: result.appointment.start_time,
                end: result.appointment.finish_time
            }, true);

            $('#editModal').modal('hide');
        });
    });
});