cie-calculator-flap/lib/strategies/alg81.js

Easily generate CIE References

'use strict';

var CIEStrategy = require('./cie_strategy.js').CIEStrategy;
var CIEUtils = require('./cie_utils.js').CIEUtils;
var cieUtils = new CIEUtils();

var Alg81 = function() {};

Alg81.prototype = new CIEStrategy();
Alg81.prototype = {
  execute: function(input) {

    var validationRules = {
      reference: {length: {min: 21, max: 49}}
    };

    if (!cieUtils.validateInput(input, validationRules)) {
      var error = new Error('Longitud invalida');
      error.status = '422';
      throw error;
    }

    return alg81(input.reference);
  }
};

module.exports.Alg81 = Alg81;

function alg81(reference){
  var digitVerify = algorithm(reference.toUpperCase());
  var reference81 = reference + digitVerify;
  return reference81;
}

function algorithm(data){
  console.log(data);
  var transformAlphanumeric = replaceAlphanumeric(data);
  console.log(transformAlphanumeric);
  var transformNumeric = buildNumeric(transformAlphanumeric);
  console.log(transformNumeric);
  var transformUnifyInfo = unifyInfo(transformNumeric);
  console.log(transformUnifyInfo);
  var digitVeirfy = "" + searchDigitVerify(transformUnifyInfo);
  return digitVeirfy.charAt(digitVeirfy.length-1);
}

function replaceAlphanumeric(data){
  var mapAlphanumeric = new Map([["A", 1], ["B", 2], ["C", 3], ["D", 4], ["E", 5], ["F", 6], ["G", 7], ["H", 8], ["I", 9], ["J", 1], ["K", 2], ["L", 3], ["M", 4], ["N", 5], ["O", 6], ["P", 7], ["Q", 8], ["R", 9], ["S", 1], ["T", 2], ["U", 3], ["V", 4], ["W", 5], ["X", 6], ["Y", 7], ["Z", 8]]);
  var transform = "";
  for (let characterData of data) {
    var infoCharacter = characterData;
    if(mapAlphanumeric.has(characterData)){
      infoCharacter = mapAlphanumeric.get(characterData);
    }
    transform += infoCharacter;
  }
  return transform;
}

function buildNumeric(data){
  var transform = [data.length];
  var isSecond = true;
  for(var i = data.length-1; i >= 0; i--) {
    var dataNumber = Number(data.charAt(i));
    var numberMultiply = isSecond ? 2 : 1;
    isSecond = isSecond ? false : true;
    transform[i] = (numberMultiply * dataNumber);
  }
  return transform;
}

function unifyInfo(data){
  var transform = [];
  for (let numberData of data) {
    var sumData = 0;
    var infoData = "" + numberData;
    for (let characterData of infoData) {
      sumData += Number(characterData);
    }
    transform.push(sumData);
  }
  return transform;
}

function searchDigitVerify(data){
  var sumData = 0;
  for (let numberData of data) {
    sumData += numberData;
  }

  var numberAux = 10;
  var residue = ((sumData % numberAux) + numberAux) % numberAux;
  return numberAux - residue;
}