cie-calculator-flap/lib/strategies/alg02.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 Alg02 = function() {};

Alg02.prototype = new CIEStrategy();
Alg02.prototype = {
  execute: function(input) {
    var validationRules = {
      reference: {length: {min: 6,max: 19}}
    };
    if (!cieUtils.validateInput(input, validationRules)) {
      throw new Error('Longitud invalida');
    }

    var acc = 0;
    var reference = parseInput(input).reverse();

    //console.log('---------');
    //console.log('\Referencia:',input.reference);
    //console.log('\Referencia Numerica:',reference.join(''));
    for(var i = 0; i < reference.length; i++) {
      var m = ( ( (i+1)%2 !== 0 ) ? 2 : 1);
      //console.log(reference[i] + ' * ' + m + ' = ' + (parseInt(reference[i],10) * m) + '\tReduccion : ' + cieUtils.sequentialAdd( parseInt(reference[i],10) * m ));
      acc += cieUtils.sequentialAdd( parseInt(reference[i],10) * m );
    }
    //console.log('Suma:',acc);
    //console.log('Multiplo 10:',cieUtils.nearestMultipleOf(acc,10));
    //console.log('Digito:',(cieUtils.nearestMultipleOf(acc,10) - acc));
    //console.log('Referencia Completa:',input.reference.toUpperCase() + (cieUtils.nearestMultipleOf(acc,10) - acc));

    return input.reference.toUpperCase() + (cieUtils.nearestMultipleOf(acc,10) - acc);
  }
};

module.exports.Alg02 = Alg02;

var parseInput = function(input) {
  var charToNum = {
    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, 1: 1, 2: 2, 3: 3, 4: 4, 5: 5, 6: 6, 7: 7, 8: 8, 9: 9, 0: 0
  };
  return cieUtils.replaceCharWithNum(input.reference.toUpperCase(), charToNum);
};