Desafio #4 - Array de Transações

transactions.js

const transactions = [
    {
        date: '2023-03-20',
        description: 'Restaurante X-Burger',
        amount: -30
    },
    {
        date: '2023-03-20',
        description: 'Cinema',
        amount: -45
    },
    {
        date: '2023-03-22',
        description: 'Apple store',
        amount: -450
    },
    {
        date: '2023-03-22',
        description: 'Chingling accessorios',
        amount: -45
    },
    {
        date: '2023-03-23',
        description: 'Café Maria josé',
        amount: -7
    },
    {
        date: '2023-04-01',
        description: 'Latam',
        amount: -1500
    },
    {
        date: '2023-04-01',
        description: 'Salário XYZ',
        amount: 5000
    },
    {
        date: '2023-04-01',
        description: 'Canaã',
        amount: -132
    },
    {
        date: '2023-04-03',
        description: 'Freelancing website',
        amount: 2000
    },
]

function findModuleIndexIfExists ({ modules, date }) {
  return modules.findIndex(({ groupDate }) => groupDate === date)
}

function groupTransactionsByDate (transactionList) {
  return transactionList
    .reduce((modules, { date, description, amount }) => {
      const moduleIndex = findModuleIndexIfExists({ modules, date })

      if (moduleIndex > -1) {
        modules[moduleIndex].transactions.push({
          amount,
          description
        })

        return modules
      }

      // date is not more necessary inside each object
      return [
        ...modules, {
          groupDate: date,
          transactions: [{ amount, description }]
        }
      ]
    }, [])
}

console.log(groupTransactionsByDate(transactions))