diff options
Diffstat (limited to 'libs/Zend/Validate/Barcode/Ean13.php')
-rw-r--r-- | libs/Zend/Validate/Barcode/Ean13.php | 88 |
1 files changed, 73 insertions, 15 deletions
diff --git a/libs/Zend/Validate/Barcode/Ean13.php b/libs/Zend/Validate/Barcode/Ean13.php index d5387e52f9..068809248c 100644 --- a/libs/Zend/Validate/Barcode/Ean13.php +++ b/libs/Zend/Validate/Barcode/Ean13.php @@ -1,4 +1,5 @@ <?php + /** * Zend Framework * @@ -14,39 +15,96 @@ * * @category Zend * @package Zend_Validate - * @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com) + * @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: Ean13.php 20096 2010-01-06 02:05:09Z bkarwin $ + * @version $Id: Ean13.php 16223 2009-06-21 20:04:53Z thomas $ */ + /** - * @see Zend_Validate_Barcode_AdapterAbstract + * @see Zend_Validate_Abstract */ -// require_once 'Zend/Validate/Barcode/AdapterAbstract.php'; +require_once 'Zend/Validate/Abstract.php'; + /** * @category Zend * @package Zend_Validate - * @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com) + * @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_Ean13 extends Zend_Validate_Barcode_AdapterAbstract +class Zend_Validate_Barcode_Ean13 extends Zend_Validate_Abstract { /** - * Allowed barcode lengths - * @var integer + * 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 13 characters long */ - protected $_length = 13; + const INVALID_LENGTH = 'invalidLength'; /** - * Allowed barcode characters - * @var string + * Validation failure message key for when the value + * does not only contain numeric characters */ - protected $_characters = '0123456789'; + const NOT_NUMERIC = 'ean13NotNumeric'; /** - * Checksum function - * @var string + * Validation failure message template definitions + * + * @var array */ - protected $_checksum = '_gtin'; + protected $_messageTemplates = array( + self::INVALID => "'%value%' is an invalid EAN-13 barcode", + self::INVALID_LENGTH => "'%value%' should be 13 characters", + self::NOT_NUMERIC => "'%value%' should contain only numeric 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($value) || !ctype_digit($value)) { + $this->_error(self::NOT_NUMERIC); + return false; + } + + $this->_setValue($value); + if (strlen($value) !== 13) { + $this->_error(self::INVALID_LENGTH); + return false; + } + + $barcode = strrev(substr($value, 0, -1)); + $oddSum = 0; + $evenSum = 0; + + for ($i = 0; $i < 12; $i++) { + if ($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[12] != $checksum) { + $this->_error(self::INVALID); + return false; + } + + return true; + } } |