02. Shopping List

function shoppingList(input) {
    let list = input.shift().split('!');

    while (input[0] !== "Go Shopping!") {
        [command, product, newProduct] = input.shift().split(' ');
        if (command === "Urgent" && !list.includes(product)) {
            list.unshift(product);
        } else if (command === "Unnecessary" && list.includes(product)) {
            list.splice(list.indexOf(product), 1);
        } else if (command === "Correct" && list.includes(product)) {
            list.splice(list.indexOf(product), 1, newProduct);
        } else if (command === "Rearrange" && list.includes(product)) {
            list.push(list.splice(list.indexOf(product), 1));
        }
    }
    console.log(list.join(", "));
    return;
}