travel time - fundamentals

function travelTime(input) {
    let countries = {};

    input.forEach(element => {
        let [country, town, currentPrice] = element.split(" > ");
        currentPrice = Number(currentPrice);
if (!(countries.hasOwnProperty(country)) {
    countries[country] = {};
    countries[country][town] = currentPrice;
} else {
    let countryObj = countries[country];
    if (!countryObj.hasOwnProperty(town)) {
        countryObj[town] = currentPrice;
    } else {
        let oldPrice = countryObj[town];
        if (oldPrice > currentPrice) {
            countryObj[town] = currentPrice;
        }
    }
}

    });

let sortCountries = Object.entries(countries)
.sort(sortCountries);

for (let [name, towns] of sortCountries) {
    let sortTowns = Object.entries(towns).sort(sortTowns);
    let output = ` ${name} ->` ;
    for (const [townName, townPrice] of sortTowns) {
        output += `${townName} -> ${townPrice}`;
    }
    console.log(output);
}

function sortCountries(firstCountry, secondCountry) {
    let firstName = firstCountry[0];
    let secondName = secondCountry[0];

    return firstName.localeCompare(secondCountry);
}

function sortTowns(firstTown, secondTown) {
    let firstPrice = firstTown[1];
    let secondPrice = secondTown[1];

    return firstPrice - secondPrice;
}

travelTime([
    "Bulgaria > Sofia > 500",
    "Bulgaria > Sopot > 800",
    "France > Paris > 2000",
    "Albania > Tirana > 1000",
    "Bulgaria > Sofia > 200"
]);