liftie/lib/opening.js

Clean, simple, easy to read, fast ski resort lift status

const debug = require('debug')('liftie:opening');
const hour = require('./tools/millis').hour;

module.exports = fetch;
module.exports.interval = {
  active: hour,
  inactive: 12 * hour
};

function str2date(date) {
  if (!date) {
    return;
  }
  const match = /^(\d{4})-(\d{2})-(\d{2})$/.exec(date);
  return match && new Date(match[1], match[2] - 1, match[3]);
}

function ifNotOpenYet(opening) {
  const openingDate = str2date(opening);
  if (openingDate && openingDate >= Date.now()) {
    return opening;
  }
}

function fetch(resort, fn) {
  debug('Calculate opening for %s', resort.id);
  process.nextTick(fn.bind(null, null, ifNotOpenYet(resort.opening)));
}