<?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

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

/**

 * @see Zend_Validate_Abstract

 */

require_once 'Zend/Validate/Abstract.php';

/**

 * @category   Zend

 * @package    Zend_Validate

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

class Zend_Validate_Isbn extends Zend_Validate_Abstract

{

    const AUTO    = 'auto';

    const ISBN10  = '10';

    const ISBN13  = '13';

    const INVALID = 'isbnInvalid';

    const NO_ISBN = 'isbnNoIsbn';

    /**

     * Validation failure message template definitions.

     *

     * @var array

     */

    protected $_messageTemplates = array(

        self::INVALID => "Invalid type given. String or integer expected",

        self::NO_ISBN => "'%value%' is not a valid ISBN number",

    );

    /**

     * Allowed type.

     *

     * @var string

     */

    protected $_type = self::AUTO;

    /**

     * Separator character.

     *

     * @var string

     */

    protected $_separator = '';

    /**

     * Set up options.

     *

     * @param  Zend_Config|array $options

     * @throws Zend_Validate_Exception When $options is not valid

     */

    public function __construct($options = array())

    {

        // prepare options

        if ($options instanceof Zend_Config) {

            $options = $options->toArray();

        }

        if (!is_array($options)) {

            /**

             * @see Zend_Validate_Exception

             */

            require_once 'Zend/Validate/Exception.php';

            throw new Zend_Validate_Exception('Invalid options provided.');

        }

        // set type

        if (array_key_exists('type', $options)) {

            $this->setType($options['type']);

        }

        // set separator

        if (array_key_exists('separator', $options)) {

            $this->setSeparator($options['separator']);

        }

    }

    /**

     * Detect input format.

     *

     * @return string

     */

    protected function _detectFormat()

    {

        // prepare separator and pattern list

        $sep      = quotemeta($this->_separator);

        $patterns = array();

        $lengths  = array();

        // check for ISBN-10

        if ($this->_type == self::ISBN10 || $this->_type == self::AUTO) {

            if (empty($sep)) {

                $pattern = '/^[0-9]{9}[0-9X]{1}$/';

                $length  = 10;

            } else {

                $pattern = "/^[0-9]{1,7}[{$sep}]{1}[0-9]{1,7}[{$sep}]{1}[0-9]{1,7}[{$sep}]{1}[0-9X]{1}$/";

                $length  = 13;

            }

            $patterns[$pattern] = self::ISBN10;

            $lengths[$pattern]  = $length;

        }

        // check for ISBN-13

        if ($this->_type == self::ISBN13 || $this->_type == self::AUTO) {

            if (empty($sep)) {

                $pattern = '/^[0-9]{13}$/';

                $length  = 13;

            } else {

                $pattern = "/^[0-9]{1,9}[{$sep}]{1}[0-9]{1,5}[{$sep}]{1}[0-9]{1,9}[{$sep}]{1}[0-9]{1,9}[{$sep}]{1}[0-9]{1}$/";

                $length  = 17;

            }

            $patterns[$pattern] = self::ISBN13;

            $lengths[$pattern]  = $length;

        }

        // check pattern list

        foreach ($patterns as $pattern => $type) {

            if ((strlen($this->_value) == $lengths[$pattern]) && preg_match($pattern, $this->_value)) {

                return $type;

            }

        }

        return null;

    }

    /**

     * Defined by Zend_Validate_Interface.

     *

     * Returns true if and only if $value is a valid ISBN.

     *

     * @param  string $value

     * @return boolean

     */

    public function isValid($value)

    {

        if (!is_string($value) && !is_int($value)) {

            $this->_error(self::INVALID);

            return false;

        }

        $value = (string) $value;

        $this->_setValue($value);

        switch ($this->_detectFormat()) {

            case self::ISBN10:

                // sum

                $isbn10 = str_replace($this->_separator, '', $value);

                $sum    = 0;

                for ($i = 0; $i < 9; $i++) {

                    $sum += (10 - $i) * $isbn10{$i};

                }

                // checksum

                $checksum = 11 - ($sum % 11);

                if ($checksum == 11) {

                    $checksum = '0';

                } elseif ($checksum == 10) {

                    $checksum = 'X';

                }

                break;

            case self::ISBN13:

                // sum

                $isbn13 = str_replace($this->_separator, '', $value);

                $sum    = 0;

                for ($i = 0; $i < 12; $i++) {

                    if ($i % 2 == 0) {

                        $sum += $isbn13{$i};

                    } else {

                        $sum += 3 * $isbn13{$i};

                    }

                }

                // checksum

                $checksum = 10 - ($sum % 10);

                if ($checksum == 10) {

                    $checksum = '0';

                }

                break;

            default:

                $this->_error(self::NO_ISBN);

                return false;

        }

        // validate

        if (substr($this->_value, -1) != $checksum) {

            $this->_error(self::NO_ISBN);

            return false;

        }

        return true;

    }

    /**

     * Set separator characters.

     *

     * It is allowed only empty string, hyphen and space.

     *

     * @param  string $separator

     * @throws Zend_Validate_Exception When $separator is not valid

     * @return Zend_Validate_Isbn Provides a fluent interface

     */

    public function setSeparator($separator)

    {

        // check separator

        if (!in_array($separator, array('-', ' ', ''))) {

            /**

             * @see Zend_Validate_Exception

             */

            require_once 'Zend/Validate/Exception.php';

            throw new Zend_Validate_Exception('Invalid ISBN separator.');

        }

        $this->_separator = $separator;

        return $this;

    }

    /**

     * Get separator characters.

     *

     * @return string

     */

    public function getSeparator()

    {

        return $this->_separator;

    }

    /**

     * Set allowed ISBN type.

     *

     * @param  string $type

     * @throws Zend_Validate_Exception When $type is not valid

     * @return Zend_Validate_Isbn Provides a fluent interface

     */

    public function setType($type)

    {

        // check type

        if (!in_array($type, array(self::AUTO, self::ISBN10, self::ISBN13))) {

            /**

             * @see Zend_Validate_Exception

             */

            require_once 'Zend/Validate/Exception.php';

            throw new Zend_Validate_Exception('Invalid ISBN type');

        }

        $this->_type = $type;

        return $this;

    }

    /**

     * Get allowed ISBN type.

     *

     * @return string

     */

    public function getType()

    {

        return $this->_type;

    }

}