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   1  <?php
   2  /**
   3   * Zend Framework
   4   *
   5   * LICENSE
   6   *
   7   * This source file is subject to the new BSD license that is bundled
   8   * with this package in the file LICENSE.txt.
   9   * It is also available through the world-wide-web at this URL:
  10   * http://framework.zend.com/license/new-bsd
  11   * If you did not receive a copy of the license and are unable to
  12   * obtain it through the world-wide-web, please send an email
  13   * to [email protected] so we can send you a copy immediately.
  14   *
  15   * @category   Zend
  16   * @package    Zend_Validate
  17   * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
  18   * @license    http://framework.zend.com/license/new-bsd     New BSD License
  19   * @version    $Id$
  20   */
  21  
  22  /**
  23   * @see Zend_Validate_Barcode_AdapterAbstract
  24   */
  25  require_once 'Zend/Validate/Barcode/AdapterAbstract.php';
  26  
  27  /**
  28   * @category   Zend
  29   * @package    Zend_Validate
  30   * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
  31   * @license    http://framework.zend.com/license/new-bsd     New BSD License
  32   */
  33  class Zend_Validate_Barcode_Royalmail extends Zend_Validate_Barcode_AdapterAbstract
  34  {
  35      /**
  36       * Allowed barcode lengths
  37       * @var integer
  38       */
  39      protected $_length = -1;
  40  
  41      /**
  42       * Allowed barcode characters
  43       * @var string
  44       */
  45      protected $_characters = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ';
  46  
  47      protected $_rows = array(
  48          '0' => 1, '1' => 1, '2' => 1, '3' => 1, '4' => 1, '5' => 1,
  49          '6' => 2, '7' => 2, '8' => 2, '9' => 2, 'A' => 2, 'B' => 2,
  50          'C' => 3, 'D' => 3, 'E' => 3, 'F' => 3, 'G' => 3, 'H' => 3,
  51          'I' => 4, 'J' => 4, 'K' => 4, 'L' => 4, 'M' => 4, 'N' => 4,
  52          'O' => 5, 'P' => 5, 'Q' => 5, 'R' => 5, 'S' => 5, 'T' => 5,
  53          'U' => 0, 'V' => 0, 'W' => 0, 'X' => 0, 'Y' => 0, 'Z' => 0,
  54       );
  55  
  56      protected $_columns = array(
  57          '0' => 1, '1' => 2, '2' => 3, '3' => 4, '4' => 5, '5' => 0,
  58          '6' => 1, '7' => 2, '8' => 3, '9' => 4, 'A' => 5, 'B' => 0,
  59          'C' => 1, 'D' => 2, 'E' => 3, 'F' => 4, 'G' => 5, 'H' => 0,
  60          'I' => 1, 'J' => 2, 'K' => 3, 'L' => 4, 'M' => 5, 'N' => 0,
  61          'O' => 1, 'P' => 2, 'Q' => 3, 'R' => 4, 'S' => 5, 'T' => 0,
  62          'U' => 1, 'V' => 2, 'W' => 3, 'X' => 4, 'Y' => 5, 'Z' => 0,
  63      );
  64  
  65      /**
  66       * Checksum function
  67       * @var string
  68       */
  69      protected $_checksum = '_royalmail';
  70  
  71      /**
  72       * Validates the checksum ()
  73       *
  74       * @param  string $value The barcode to validate
  75       * @return boolean
  76       */
  77      protected function _royalmail($value)
  78      {
  79          $checksum = substr($value, -1, 1);
  80          $values   = str_split(substr($value, 0, -1));
  81          $rowvalue = 0;
  82          $colvalue = 0;
  83          foreach($values as $row) {
  84              $rowvalue += $this->_rows[$row];
  85              $colvalue += $this->_columns[$row];
  86          }
  87  
  88          $rowvalue %= 6;
  89          $colvalue %= 6;
  90  
  91          $rowchkvalue = array_keys($this->_rows, $rowvalue);
  92          $colchkvalue = array_keys($this->_columns, $colvalue);
  93          $chkvalue    = current(array_intersect($rowchkvalue, $colchkvalue));
  94          if ($chkvalue == $checksum) {
  95              return true;
  96          }
  97  
  98          return false;
  99      }
 100  
 101      /**
 102       * Allows start and stop tag within checked chars
 103       *
 104       * @param  string $value The barcode to check for allowed characters
 105       * @return boolean
 106       */
 107      public function checkChars($value)
 108      {
 109          if ($value[0] == '(') {
 110              $value = substr($value, 1);
 111  
 112              if ($value[strlen($value) - 1] == ')') {
 113                  $value = substr($value, 0, -1);
 114              } else {
 115                  return false;
 116              }
 117          }
 118  
 119          return parent::checkChars($value);
 120      }
 121  }