Tickets

tickets = (data = [], criteria = '') => {
    class Ticket {
        constructor(destination, price, status) {
            this.destination = destination;
            this.price = Number(price);
            this.status = status;
        }
    }

    const statuses = {
        'available': 1,
        'departed': 2,
        'sold': 3
    };

    const sortAlpabetically = (str1, str2) => {
        return str1.localeCompare(str2);
    };

    const sortTickets = (a, b) => {
        if(criteria === 'price') {
            return a.price - b.price;
        } else if(criteria === 'status') {
            return statuses[a.status] - statuses[b.status];
        }

        return sortAlpabetically(a.destination, b.destination);
    };

    return data
        .map(str => new Ticket(...str.split('|')))
        .sort(sortTickets || sortAlpabetically(a.destination, b.destination));

};