text: /**
   * Created by wanderley_panosso on 29/01/2016.
   */
  'use strict';
  
  let DDI = __filename.split('/').pop().split('.').shift();
  
  module.exports = function(phoneDigits, DDD){
      DDD = DDD || '11';
  
      // removes all zeros from the beginning useful for "016..." or "01516..."
      while(phoneDigits[0] === '0'){
          phoneDigits.shift();
      }
  
      // if number is 8 or 9 digits long, it does not have a DDD
      if((phoneDigits.length === 8) || (phoneDigits.length === 9)) {
          // prepends the host's DDD
          phoneDigits = DDD.split('').concat(phoneDigits);
      }
  
      // if number is 12 or 13 digits long, it has the operator's prefix
      if((phoneDigits.length === 12) || (phoneDigits.length === 13)){
          // removes the operator's prefix
          phoneDigits = phoneDigits.slice(2);
      }
  
      // if number 10 or 11 digits long, it does not hava a DDI
      if((phoneDigits.length === 10) || (phoneDigits.length === 11)){
          // prepends the host's DDI
          phoneDigits = DDI.split('').concat(phoneDigits);
      }
  
      return phoneDigits;
  };