diff options
Diffstat (limited to 'libs/Zend/Validate/Barcode/UpcA.php')
-rw-r--r-- | libs/Zend/Validate/Barcode/UpcA.php | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/libs/Zend/Validate/Barcode/UpcA.php b/libs/Zend/Validate/Barcode/UpcA.php new file mode 100644 index 0000000000..cf33f31fab --- /dev/null +++ b/libs/Zend/Validate/Barcode/UpcA.php @@ -0,0 +1,103 @@ +<?php + +/** + * Zend Framework + * + * LICENSE + * + * This source file is subject to the new BSD license that is bundled + * with this package in the file LICENSE.txt. + * It is also available through the world-wide-web at this URL: + * http://framework.zend.com/license/new-bsd + * If you did not receive a copy of the license and are unable to + * obtain it through the world-wide-web, please send an email + * to license@zend.com so we can send you a copy immediately. + * + * @category Zend + * @package Zend_Validate + * @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com) + * @license http://framework.zend.com/license/new-bsd New BSD License + * @version $Id: UpcA.php 16223 2009-06-21 20:04:53Z thomas $ + */ + + +/** + * @see Zend_Validate_Abstract + */ +require_once 'Zend/Validate/Abstract.php'; + + +/** + * @category Zend + * @package Zend_Validate + * @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com) + * @license http://framework.zend.com/license/new-bsd New BSD License + */ +class Zend_Validate_Barcode_UpcA extends Zend_Validate_Abstract +{ + /** + * Validation failure message key for when the value is + * an invalid barcode + */ + const INVALID = 'invalid'; + + /** + * Validation failure message key for when the value is + * not 12 characters long + */ + const INVALID_LENGTH = 'invalidLength'; + + /** + * Validation failure message template definitions + * + * @var array + */ + protected $_messageTemplates = array( + self::INVALID => "'%value%' is an invalid UPC-A barcode", + self::INVALID_LENGTH => "'%value%' should be 12 characters", + ); + + /** + * Defined by Zend_Validate_Interface + * + * Returns true if and only if $value contains a valid barcode + * + * @param string $value + * @return boolean + */ + public function isValid($value) + { + if (!is_string($value)) { + $this->_error(self::INVALID); + return false; + } + + $this->_setValue($value); + if (strlen($value) !== 12) { + $this->_error(self::INVALID_LENGTH); + return false; + } + + $barcode = substr($value, 0, -1); + $oddSum = 0; + $evenSum = 0; + + for ($i = 0; $i < 11; $i++) { + if ($i % 2 === 0) { + $oddSum += $barcode[$i] * 3; + } elseif ($i % 2 === 1) { + $evenSum += $barcode[$i]; + } + } + + $calculation = ($oddSum + $evenSum) % 10; + $checksum = ($calculation === 0) ? 0 : 10 - $calculation; + + if ($value[11] != $checksum) { + $this->_error(self::INVALID); + return false; + } + + return true; + } +} |