02. On the Way to Annapurna Final Exam - 14 April 2019 Group

function onTheWayToAnnapurna(input) {
    let output = {};
    let curCommand = input.shift();

    while (curCommand !== 'END') {
        let [command, store, items] = curCommand.split('->');
        if (command === 'Add') {
            if (!Object.keys(output).includes(store)) {
                output[store] = []
            }
            items.split(',').forEach(element => {
                output[store].push(element);
            });
        } else if (command === 'Remove') {
            if (Object.keys(output).includes(store)) {
                delete(output[store]);
            }
        }
        curCommand = input.shift();
    }
    output = Object.entries(output);
    output.sort((a, b) => {
        if (a[1].length > b[1].length) {
            return -1;
        } else if (a[1].length < b[1].length) {
            return 1;
        } else {
            if (a[0] > b[0]) {
                return -1;
            } else if (a[0] < b[0]) {
                return 1
            }
        }
    });
    console.log('Stores list:');
    output.forEach(element => {
        console.log(element[0]);
        element[1].forEach(element1 => {
            console.log(`<<${element1}>>`);

        });
    });
}