Fetch all Dominaria cards from Magic: the Gathering API

fetch-all-dominaria-cards.js

'use-strict'

const api = 'https://api.magicthegathering.io/v1'

const dominariaPage1 = fetch(new Request(Resource(Page(1))))
const dominariaPage2 = fetch(new Request(Resource(Page(2))))
const dominariaPage3 = fetch(new Request(Resource(Page(3))))

Promise
  .all([dominariaPage1, dominariaPage2, dominariaPage3])
  .then((responses) => Promise.all(responses.map(toJSON)))
  .then((pages) => pages.map(toCards))
  .then((cards) => cards.reduce(flatten))
  .then((cards) => cards.map(toTinyCard))
  .then(console.info)
  .catch(console.error)

function Page(number = 1) {
  return { page: number }
}

function Resource({ set = 'dom', page = 1 }) {
  return `${api}/cards?set=${set}&page=${page}`
}

function toJSON(response) {
  return response.json()
}

function toCards({ cards = [] }) {
  return cards
}

function flatten(prev, next) {
  return prev.concat(next)
}

function toTinyCard({ number, name, rarity }) {
  return { number: Number(number), name, rarity }
}