03. Cappy Juice

function cappyJuice(input) {
  const quantities = {};
  const bottles = {};

  input.forEach((line) => {
    const tokens = line.split(' => ');
    const [fruit, quantity] = tokens;

    if (!quantities.hasOwnProperty(fruit)) {
      quantities[fruit] = 0;
    }

    quantities[fruit] += Number(quantity);
    if (quantities[fruit] >= 1000) {
      bottles[fruit] = parseInt(quantities[fruit] / 1000);
    }
  });

  Object.keys(bottles).forEach((key) => {
    console.log(`${key} => ${bottles[key]}`);
  });
}