equinox.js

const IS_BROWSER = typeof window !== 'undefined';

if (!IS_BROWSER) {
  require('isomorphic-fetch');
}

const COOKIE = 'REPLACE W YOURS';

const API_BASE = 'https://api.equinox.com';

const CLUB_IDS = {
  flatiron: 102,
};

const FAVORITE_BIKES = {
  door: 47,
  nearDoor: 46
};

function reserveBike(clubId, classId, bikeNumber) {
  getBikeByNumber(classId, bikeNumber)
    .then((bike) => bike.reservableEquipmentId)
    .then((bikeId) => {
      return equinoxFetch(`/v2/bookaclass/${classId}/book/${clubId}?bikeId=${bikeId}`, {
        method: 'PUT'
      })
    })
    .then(console.log)
    .catch((e) => {
      console.error('\n\n');
      console.error(`FAILED TO RESERVER BIKE #${bikeNumber}`);
      console.error(e, e.stack);
      console.error('\n\n');
    });
}

function getBikeByNumber(classId, bikeNumber) {
  return getAvailableBikes(classId)
    .then((bikes) => {
      const bike = bikes.find((bike) => bike.localId === bikeNumber);
      return bike
        ? bike
        : Promise.reject(new Error(`failed to find bike by number (#${bikeNumber})`));
    });
}

function getAvailableBikes(classId) {
  return equinoxFetch(`/v2/bookaclass/equipments/${classId}?_=${Date.now()}`)
    .then((json) => json.layout.equipments);
}

function timeLeftForReservation(classId) {
  return equinoxFetch(`/v3/classes/reservation-starttimeleft/${classId}`)
    .then((json) => json.result * 1000)
}

function equinoxFetch(path, opts) {
  return fetch(`${API_BASE}${path}`, Object.assign({}, {
    credentials: 'include',
    headers: {
      cookie: COOKIE,
      'content-type': 'application/json'
    }
  }, opts)).then((r) => {
    if (!r.ok || !String(r.status).startsWith('2')) {
      return Promise.reject(r);
    }
    return r.json();
  });
}

if (!IS_BROWSER) {
  module.exports.reserveBike = reserveBike;
  module.exports.getBikeByNumber = getBikeByNumber;
  module.exports.getAvailableBikes = getAvailableBikes;
  module.exports.equinoxFetch = equinoxFetch;
  module.exports.timeLeftForReservation = timeLeftForReservation;
} else {
  function reserveWhenCan() {
    const [, clubId] = document.querySelector('ul.category-list a').href.match(/clubs=(\d+)/);
    const [, classId] = window.location.pathname.match(/\/(\d+?)($|\?)/);
    const bikeNumber = prompt(`What Bike Number? ${JSON.stringify(FAVORITE_BIKES)}`);

    timeLeftForReservation(classId)
      .then((msLeft) => {
        const hours = (msLeft / 1000 / 60 / 60).toFixed(2);

        alert(`
          Cool, I'm gonna book in ${hours} hours:
          Club: ${clubId}
          Class: ${classId}
          Bike: #${bikeNumber}

          NOTE: MAKE SURE TO LEAVE THIS WINDOW OPEN
        `);

        setTimeout(() => {
          reserveBike(clubId, classId, bikeNumber);
        }, msLeft + 10);

        window.onbeforeunload = () => {
          return `
            I'm scheduled to book you a bike in ${hours} hours.
            If you close this window, I won't!
          `;
        };
      })
      .catch(console.error)
  }
}

amazing