Feed the Animals

function solve(input) {
    let animals = {};
    let areas = {}

    for (let parts of input) {
        if (parts === 'Last Info') {
            break;
        }

        let [command, name, limit, area] = parts.split(':');
        limit = Number(limit);

        if (command === 'Add') {
            if (!animals.hasOwnProperty(name)) {
                animals[name] = limit;

                if (!areas.hasOwnProperty(area)) {
                    areas[area] = 1;

                } else {
                    areas[area]++;
                }
            }

            else {
                animals[name] += limit;
            }
        }

        else if (command === 'Feed') {
            if (animals.hasOwnProperty(name)) {
                animals[name] -= limit;

                if (animals[name] <= 0) {
                    console.log(`${name} was successfully fed`);
                    delete animals[name];
                    areas[area]--
                }

                if (areas[area] <= 0){
                    delete areas[area]
                }
            }
        }
    }

    console.log(`Animals:`);
    let sorted = Object.entries(animals)
        .sort((a, b) => {
            let result = b[1] - a[1]
            if (result === 0) {
                result = a[0].localeCompare(b[0]);
            }
            return result

        })
    for (let [name, limit] of sorted) {
        console.log(`${name} -> ${limit}g`)
    }

    console.log(`Areas with hungry animals:`);
    let sortedAreas = Object.entries(areas)
        .sort((a, b) => {
            let result = b[1] - a[1]
            return result
        });

    for (let [name, count] of sortedAreas) {
        console.log(`${name} : ${count}`);
    }
}