big-oil/index.js

Fusion engine picker for PAYDAY 2's Big Oil heist

const filter = require('lodash.filter');
const isBoolean = require('lodash.isboolean');
const isNumber = require('lodash.isnumber');
const pluck = require('lodash.pluck');

/**
 * Narrows down fusion engines based on information lying around the lab.
 *
 * @param {String} [element] Element written down on the spiral notebook
 * @param {Number} [tubes] Number of tubes written down on the clipboard
 * @param {Boolean} [psiGreaterThan5800] Pressure on computer is higher than
 *  ~5800
 * @return {Array} possible engines
 * @api public
 */
function bigOil(element, tubes, psiGreaterThan5800) {
  if (isNumber(element)) {
    if (isBoolean(tubes)) {
      psiGreaterThan5800 = tubes;
    }
    tubes = element;
  }

  if (isBoolean(element)) {
    psiGreaterThan5800 = element;
  }

  if (isBoolean(tubes)) {
    psiGreaterThan5800 = tubes;
  }

  let engines = [
    { num: 1, can: 1, hyd: 1, bar: 375 },
    { num: 2, can: 2, hyd: 1, bar: 500 },
    { num: 3, can: 3, hyd: 2, bar: 400 },
    { num: 4, can: 1, hyd: 2, bar: 400 },
    { num: 5, can: 2, hyd: 2, bar: 300 },
    { num: 6, can: 3, hyd: 2, bar: 450 },
    { num: 7, can: 3, hyd: 3, bar: 375 },
    { num: 8, can: 1, hyd: 3, bar: 275 },
    { num: 9, can: 2, hyd: 3, bar: 375 },
    { num: 10, can: 3, hyd: 3, bar: 400 },
    { num: 11, can: 1, hyd: 3, bar: 425 },
    { num: 12, can: 2, hyd: 3, bar: 510 }
  ];

  switch (element) {
    case 'nitrogen':
      engines = filter(engines, { can: 1 });
      break;
    case 'deterium':
      engines = filter(engines, { can: 2 });
      break;
    case 'helium':
      engines = filter(engines, { can: 3 });
      break;
    default:
      break;
  }

  if (isNumber(tubes)) {
    engines = filter(engines, { hyd: tubes });
  }

  if (isBoolean(psiGreaterThan5800)) {
    engines = psiGreaterThan5800
      ? filter(engines, function(engine) {
        return engine.bar * 14.5037738 > 5783;
      })
      : filter(engines, function(engine) {
        return engine.bar * 14.5037738 < 5812;
      });
  }

  return pluck(engines, 'num');
}

module.exports = bigOil;