Bus Schedule

 function solve() {
        let baseServiceUrl = 'https://judgetests.firebaseio.com/schedule/';
        let currentId = "depot";
        let name = '';

        function depart() {
            $('#depart').prop('disabled', true);
            $.get(baseServiceUrl + currentId + '.json')
                    .then(function (data) {
                        name = data.name;
                        currentId = data.next;
                        $('#info').find('span').text(`Next stop ${data.name}`);
                        $('#arrive').prop('disabled', false)
                    })
        }

        function arrive() {
            $('#depart').prop('disabled', false);
            $('#arrive').prop('disabled', true);
            $('#info').find('span').text(`Arriving at ${name}`);
        }

        return {
            depart,
            arrive
        };
    }