@engine2/efa-utils/calcFuelling.js

Library for EFA Apps utility functions

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;

var _round = _interopRequireDefault(require("lodash/round"));

var _mapValues = _interopRequireDefault(require("lodash/fp/mapValues"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var possibleFuelActualUnit = ['l', 'u', 'i', 'k', 'p'];
var possibleWeightUnit = ['kg', 'lb'];

var calcFuelling = function calcFuelling(_ref) {
  var _ref$fuelRef = _ref.fuelRef,
      fuelRef = _ref$fuelRef === void 0 ? 0 : _ref$fuelRef,
      _ref$convertingCoef = _ref.convertingCoef,
      convertingCoef = _ref$convertingCoef === void 0 ? 0.8 : _ref$convertingCoef,
      _ref$fuelActual = _ref.fuelActual,
      fuelActual = _ref$fuelActual === void 0 ? 0 : _ref$fuelActual,
      _ref$fuelActualUnit = _ref.fuelActualUnit,
      fuelActualUnit = _ref$fuelActualUnit === void 0 ? 'l' : _ref$fuelActualUnit,
      _ref$fuelPrev = _ref.fuelPrev,
      fuelPrev = _ref$fuelPrev === void 0 ? 0 : _ref$fuelPrev,
      _ref$weightUnit = _ref.weightUnit,
      weightUnit = _ref$weightUnit === void 0 ? 'kg' : _ref$weightUnit;

  // convertingCoef. always Litres to kg/lb
  if (!possibleFuelActualUnit.includes(fuelActualUnit)) {
    throw new Error("Wrong fuelActualUnit. Possible values are ".concat(possibleFuelActualUnit.join(', ')));
  }

  if (!possibleWeightUnit.includes(weightUnit)) {
    throw new Error("Wrong weightUnit. Possible values are ".concat(possibleWeightUnit.join(', ')));
  }

  var fuelWanted = Number(fuelRef) - Number(fuelPrev);
  var fuelWantedConverted = fuelWanted / Number(convertingCoef);
  var fuelActualConverted = 0;

  switch (fuelActualUnit) {
    case 'k':
      fuelActualConverted = weightUnit === 'kg' ? Number(fuelActual) : 2.20462 * Number(fuelActual);
      break;

    case 'l':
      fuelActualConverted = Number(fuelActual) * Number(convertingCoef); // Litres to kg

      break;

    case 'u':
      fuelActualConverted = 3.78541 * Number(fuelActual) * Number(convertingCoef); // Convert to Litres first, then to kg

      break;

    case 'i':
      fuelActualConverted = 4.54609 * Number(fuelActual) * Number(convertingCoef); // Convert to Litres first, then to kg

      break;

    case 'p':
      fuelActualConverted = weightUnit === 'lb' ? Number(fuelActual) : 0.453592 * Number(fuelActual); // Pounds to kg

      break;
  }

  var discrepancy = fuelActualConverted - fuelWanted;
  var discrepancyPerc = fuelWantedConverted ? discrepancy / fuelWantedConverted * 100 : 0;
  var discrepancySign = discrepancy > 0 ? '+' : '';
  return (0, _mapValues.default)(function (val) {
    return typeof val === 'number' ? (0, _round.default)(val, 1) : val;
  }, {
    fuelWanted: fuelWanted,
    fuelWantedConverted: fuelWantedConverted,
    fuelActualConverted: fuelActualConverted,
    discrepancy: discrepancy,
    discrepancyPerc: discrepancyPerc,
    discrepancySign: discrepancySign
  });
};

var _default = calcFuelling;
exports.default = _default;
module.exports = exports.default;