Dutch License Plate Functions

dutchLicensePlate.js

define(function () {

  'use strict';

  function getSidecodeByLicensePlate (licensePlate) {
    var sidecodes = [];
    var i = 0;

    licensePlate = licensePlate.replace(/-/g, '').toUpperCase();
    // See http://nl.wikipedia.org/wiki/Nederlands_kenteken#Alle_sidecodes
    sidecodes[0] = /^[a-zA-Z]{2}[\d]{2}[\d]{2}$/;      // 1 XX-99-99
    sidecodes[1] = /^[\d]{2}[\d]{2}[a-zA-Z]{2}$/;      // 2 99-99-XX
    sidecodes[2] = /^[\d]{2}[a-zA-Z]{2}[\d]{2}$/;      // 3 99-XX-99
    sidecodes[3] = /^[a-zA-Z]{2}[\d]{2}[a-zA-Z]{2}$/;  // 4 XX-99-XX
    sidecodes[4] = /^[a-zA-Z]{2}[a-zA-Z]{2}[\d]{2}$/;  // 5 XX-XX-99
    sidecodes[5] = /^[\d]{2}[a-zA-Z]{2}[a-zA-Z]{2}$/;  // 6 99-XX-XX
    sidecodes[6] = /^[\d]{2}[a-zA-Z]{3}[\d]{1}$/;      // 7 99-XXX-9
    sidecodes[7] = /^[\d]{1}[a-zA-Z]{3}[\d]{2}$/;      // 8 9-XXX-99
    sidecodes[8] = /^[a-zA-Z]{2}[\d]{3}[a-zA-Z]{1}$/;  // 9 XX-999-X
    sidecodes[9] = /^[a-zA-Z]{1}[\d]{3}[a-zA-Z]{2}$/;  // 10 X-999-XX
    sidecodes[10] = /^[a-zA-Z]{3}[\d]{2}[a-zA-Z]{1}$/; // 11 XXX-99-X
    sidecodes[11] = /^[a-zA-Z]{1}[\d]{2}[a-zA-Z]{3}$/; // 12 X-99-XXX
    sidecodes[12] = /^[\d]{1}[a-zA-Z]{2}[\d]{3}$/;     // 13 9-XX-999
    sidecodes[13] = /^[\d]{3}[a-zA-Z]{2}[\d]{1}$/;     // 14 999-XX-9

    for (i = 0; i < sidecodes.length; i++) {
      if (licensePlate.match(sidecodes[i])) {
        return i + 1;
      }
    }

    // Licenseplates for diplomats
    if (licensePlate.match(/^CD[ABFJNST][0-9]{1,3}$/)) { //for example: CDB1 of CDJ45
      return 'CD';
    }
    return false;
  }

  function formatLicensePlate(licensePlate, sidecode) {
    /* jshint maxcomplexity:15 */
    licensePlate = licensePlate.replace(/-/g, '').toUpperCase();

    // See http://nl.wikipedia.org/wiki/Nederlands_kenteken#Alle_sidecodes
    var positions = {};
    positions['1'] = positions['2'] = positions['3'] = positions['4'] = positions['5'] = positions['6'] = [2, 4];
    positions['7'] = positions['9'] = [2, 5];
    positions['8'] = positions['10'] = [1, 4];
    positions['11'] = positions['14'] = [3, 5];
    positions['12'] = positions['13'] = [1, 3];

    var dashPositions = positions[sidecode];
    addDashes(licensePlate, dashPositions[0], dashPositions[1]);
  }

  function addDashes(licensePlate, position1, position2) {
    return [
      licensePlate.substring(0, position1),
      licensePlate.substring(position1, position2),
      licensePlate.substr(position2)
    ].join('-');
  }

  function validateLicensePlate(licensePlate) {
    return !!getSidecodeByLicensePlate(licensePlate);
  }

  return {
    validate: validateLicensePlate,
    format: formatLicensePlate,
    getSideCode: getSidecodeByLicensePlate
  };
});