<?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_Filter

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

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

 * @version    $Id: Compress.php 20096 2010-01-06 02:05:09Z bkarwin $

 */

/**

 * @see Zend_Filter_Interface

 */

require_once 'Zend/Filter/Interface.php';

/**

 * Compresses a given string

 *

 * @category   Zend

 * @package    Zend_Filter

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

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

 */

class Zend_Filter_Compress implements Zend_Filter_Interface

{

    /**

     * Compression adapter

     */

    protected $_adapter = 'Gz';

    /**

     * Compression adapter constructor options

     */

    protected $_adapterOptions = array();

    /**

     * Class constructor

     *

     * @param string|array $options (Optional) Options to set

     */

    public function __construct($options = null)

    {

        if ($options instanceof Zend_Config) {

            $options = $options->toArray();

        }

        if (is_string($options)) {

            $this->setAdapter($options);

        } elseif ($options instanceof Zend_Filter_Compress_CompressInterface) {

            $this->setAdapter($options);

        } elseif (is_array($options)) {

            $this->setOptions($options);

        }

    }

    /**

     * Set filter setate

     *

     * @param  array $options

     * @return Zend_Filter_Compress

     */

    public function setOptions(array $options)

    {

        foreach ($options as $key => $value) {

            if ($key == 'options') {

                $key = 'adapterOptions';

            }

            $method = 'set' . ucfirst($key);

            if (method_exists($this, $method)) {

                $this->$method($value);

            }

        }

        return $this;

    }

    /**

     * Returns the current adapter, instantiating it if necessary

     *

     * @return string

     */

    public function getAdapter()

    {

        if ($this->_adapter instanceof Zend_Filter_Compress_CompressInterface) {

            return $this->_adapter;

        }

        $adapter = $this->_adapter;

        $options = $this->getAdapterOptions();

        if (!class_exists($adapter)) {

            require_once 'Zend/Loader.php';

            if (Zend_Loader::isReadable('Zend/Filter/Compress/' . ucfirst($adapter) . '.php')) {

                $adapter = 'Zend_Filter_Compress_' . ucfirst($adapter);

            }

            Zend_Loader::loadClass($adapter);

        }

        $this->_adapter = new $adapter($options);

        if (!$this->_adapter instanceof Zend_Filter_Compress_CompressInterface) {

            require_once 'Zend/Filter/Exception.php';

            throw new Zend_Filter_Exception("Compression adapter '" . $adapter . "' does not implement Zend_Filter_Compress_CompressInterface");

        }

        return $this->_adapter;

    }

    /**

     * Retrieve adapter name

     *

     * @return string

     */

    public function getAdapterName()

    {

        return $this->getAdapter()->toString();

    }

    /**

     * Sets compression adapter

     *

     * @param  string|Zend_Filter_Compress_CompressInterface $adapter Adapter to use

     * @return Zend_Filter_Compress

     */

    public function setAdapter($adapter)

    {

        if ($adapter instanceof Zend_Filter_Compress_CompressInterface) {

            $this->_adapter = $adapter;

            return $this;

        }

        if (!is_string($adapter)) {

            require_once 'Zend/Filter/Exception.php';

            throw new Zend_Filter_Exception('Invalid adapter provided; must be string or instance of Zend_Filter_Compress_CompressInterface');

        }

        $this->_adapter = $adapter;

        return $this;

    }

    /**

     * Retrieve adapter options

     *

     * @return array

     */

    public function getAdapterOptions()

    {

        return $this->_adapterOptions;

    }

    /**

     * Set adapter options

     *

     * @param  array $options

     * @return void

     */

    public function setAdapterOptions(array $options)

    {

        $this->_adapterOptions = $options;

        return $this;

    }

    /**

     * Calls adapter methods

     *

     * @param string       $method  Method to call

     * @param string|array $options Options for this method

     */

    public function __call($method, $options)

    {

        $adapter = $this->getAdapter();

        if (!method_exists($adapter, $method)) {

            require_once 'Zend/Filter/Exception.php';

            throw new Zend_Filter_Exception("Unknown method '{$method}'");

        }

        return call_user_func_array(array($adapter, $method), $options);

    }

    /**

     * Defined by Zend_Filter_Interface

     *

     * Compresses the content $value with the defined settings

     *

     * @param  string $value Content to compress

     * @return string The compressed content

     */

    public function filter($value)

    {

        return $this->getAdapter()->compress($value);

    }

}