nicolasmendonca

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nicolasmendonca

// We declare our mapper function, context aware
function mapProductId(transactionsArray) {
  return transactionsArray
    .map(transaction => ({
      ...transaction,
      productId: this.getProductId(transaction.id)
    }))
}

// And now, we can transform our data like so

nicolasmendonca

const response3 = [
  { purchaseId: 21, productName: 'Bag' },
  { purchaseId: 22, productName: 'Lamp' },
];

const requiredOutput3 = [
  { productId: 31, purchaseId: 21, product: { name: 'Bag' } },
  { productId: 32, purchaseId: 22, product: { name: 'Lamp' } },
];

nicolasmendonca

function responseMapper(response, mapperFunctions) {
  return mapperFunctions.reduce(
    (result, mapper) => mapper(result),
    response
  );
}

// And call it like this
const result1 = responseMapper(response1, [
  mapProductName,

nicolasmendonca

function mapTransactionIdIntoId(transactionsIarray) {
  return transactionsIarray
    .map( ({ transactionId, ...rest }) => ({
      ...rest,
      id: transactionId,
    }) )
}

nicolasmendonca

const response2 = [
  { transactionId: 1, productName: 'Desk' },
  { transactionId: 2, productName: 'Clock' },
];

const requiredResponse2Output = [
  { id: 1, product: { name: 'Desk' } },
  { id: 2, product: { name: 'Clock' } },
];

nicolasmendonca

function mapProductName(transactionsArray) {
  return transactionsArray
    .map(
      ({ productName, ...rest }) => ({
        ...rest,
        product: { name: productName }
      }),
    );
}

nicolasmendonca

const response1 = [
 { id: 1, productName: 'Chair' },
 { id: 2, productName: 'Table' },
];
const requiredResponse1Output = [
 { id: 1, product: { name: 'Chair' } },
 { id: 2, product: { name: 'Table' } },
];

nicolasmendonca

const response1 = [
 { id: 1, productName: 'Chair' },
 { id: 2, productName: 'Table' },
];
const requiredResponse1Output = [
 { id: 1, product: { name: 'Chair' } },
 { id: 2, product: { name: 'Table' } },
];

nicolasmendonca

const response1 = [
 { id: 1, productName: 'Chair' },
 { id: 2, productName: 'Table' },
];
const requiredResponse1Output = [
 { id: 1, product: { name: 'Chair' } },
 { id: 2, product: { name: 'Table' } },
];