<?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    $Id$
 */

/**
 * @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 extends Zend_Validate_Abstract
{
    /**
     * Barcode validator
     *
     * @var Zend_Validate_Abstract
     */
    protected $_barcodeValidator;

    /**
     * Generates the standard validator object
     *
     * @param  string|Zend_Config $barcode Barcode validator to use
     * @return void
     * @throws Zend_Validate_Exception
     */
    public function __construct($barcode)
    {
        if ($barcode instanceof Zend_Config) {
            $barcode = $barcode->toArray();
            if (array_key_exists('barcode', $barcode)) {
                $barcode = $barcode['barcode'];
            } else {
                require_once 'Zend/Validate/Exception.php';
                throw new Zend_Validate_Exception("Missing option 'barcode'");
            }
        }

        $this->setType($barcode);
    }

    /**
     * Sets a new barcode validator
     *
     * @param  string $barcode - Barcode validator to use
     * @return void
     * @throws Zend_Validate_Exception
     */
    public function setType($barcode)
    {
        switch (strtolower($barcode)) {
            case 'upc':
            case 'upc-a':
                require_once 'Zend/Validate/Barcode/UpcA.php';
                $class = 'Zend_Validate_Barcode_UpcA';
                break;
            case 'ean13':
            case 'ean-13':
                require_once 'Zend/Validate/Barcode/Ean13.php';
                $class = 'Zend_Validate_Barcode_Ean13';
                break;
            default:
                require_once 'Zend/Validate/Exception.php';
                throw new Zend_Validate_Exception("Barcode type '$barcode' is not supported'");
                break;
        }

        $this->_barcodeValidator = new $class;
    }

    /**
     * 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)
    {
        return call_user_func(array($this->_barcodeValidator, 'isValid'), $value);
    }
}