<?php

/**

 * 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_Cloud

 * @subpackage StorageService

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

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

 */

require_once 'Zend/Cloud/StorageService/Adapter.php';

require_once 'Zend/Cloud/StorageService/Exception.php';

/**

 * FileSystem adapter for unstructured cloud storage.

 *

 * @category   Zend

 * @package    Zend_Cloud

 * @subpackage StorageService

 * @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_Cloud_StorageService_Adapter_FileSystem implements Zend_Cloud_StorageService_Adapter

{

    /**

     * Options array keys for the file system adapter.

     */

    const LOCAL_DIRECTORY = 'local_directory';

    /**

     * The directory for the data

     * @var string

     */

    protected $_directory = null;

    /**

     * Constructor

     * 

     * @param  array|Zend_Config $options 

     * @return void

     */

    public function __construct($options = array()) 

    {

        if ($options instanceof Zend_Config) {

            $options = $options->toArray();

        }

        if (!is_array($options)) {

            throw new Zend_Cloud_StorageService_Exception('Invalid options provided');

        }

        if (isset($options[self::LOCAL_DIRECTORY])) {

            $this->_directory = $options[self::LOCAL_DIRECTORY];

        } else {

            $this->_directory = realpath(sys_get_temp_dir());

        }

    }

    /**

     * Get an item from the storage service.

     *

     * TODO: Support streaming

     *

     * @param  string $path

     * @param  array $options

     * @return false|string

     */

    public function fetchItem($path, $options = array()) 

    {

        $filepath = $this->_getFullPath($path);

        $path     = realpath($filepath);

        if (!$path) {

            return false;

        }

        return file_get_contents($path);

    }

    /**

     * Store an item in the storage service.

     *

     * WARNING: This operation overwrites any item that is located at

     * $destinationPath.

     *

     * @TODO Support streams

     *

     * @param  string $destinationPath

     * @param  mixed $data

     * @param  array $options

     * @return void

     */

    public function storeItem($destinationPath, $data, $options = array()) 

    {

        $path = $this->_getFullPath($destinationPath);

        file_put_contents($path, $data);

        chmod($path, 0777);

    }

    /**

     * Delete an item in the storage service.

     *

     * @param  string $path

     * @param  array $options

     * @return void

     */

    public function deleteItem($path, $options = array()) 

    {

        if (!isset($path)) {

            return;

        }

        $filepath = $this->_getFullPath($path);

        if (file_exists($filepath)) {

            unlink($filepath);

        }

    }

    /**

     * Copy an item in the storage service to a given path.

     *

     * WARNING: This operation is *very* expensive for services that do not

     * support copying an item natively.

     *

     * @TODO Support streams for those services that don't support natively

     *

     * @param  string $sourcePath

     * @param  string $destination path

     * @param  array $options

     * @return void

     */

    public function copyItem($sourcePath, $destinationPath, $options = array()) 

    {

        copy($this->_getFullPath($sourcePath), $this->_getFullPath($destinationPath));

    }

    /**

     * Move an item in the storage service to a given path.

     *

     * WARNING: This operation is *very* expensive for services that do not

     * support moving an item natively.

     *

     * @TODO Support streams for those services that don't support natively

     *

     * @param  string $sourcePath

     * @param  string $destination path

     * @param  array $options

     * @return void

     */

    public function moveItem($sourcePath, $destinationPath, $options = array()) 

    {

        rename($this->_getFullPath($sourcePath), $this->_getFullPath($destinationPath));

    }

        /**

     * Rename an item in the storage service to a given name.

     *

     *

     * @param  string $path

     * @param  string $name

     * @param  array $options

     * @return void

     */

    public function renameItem($path, $name, $options = null) 

    {

        rename(

            $this->_getFullPath($path), 

            dirname($this->_getFullPath($path)) . DIRECTORY_SEPARATOR . $name

        );

    }

    /**

     * List items in the given directory in the storage service

     *

     * The $path must be a directory

     *

     *

     * @param  string $path Must be a directory

     * @param  array $options

     * @return array A list of item names

     */

    public function listItems($path, $options = null) 

    {

        $listing = scandir($this->_getFullPath($path));

        // Remove the hidden navigation directories

        $listing = array_diff($listing, array('.', '..'));

        return $listing;

    }

    /**

     * Get a key/value array of metadata for the given path.

     *

     * @param  string $path

     * @param  array $options

     * @return array

     */

    public function fetchMetadata($path, $options = array()) 

    {

        $fullPath = $this->_getFullPath($path);

        $metadata = null;

        if (file_exists($fullPath)) {

            $metadata = stat(realpath($fullPath));

        }

        return isset($metadata) ? $metadata : false;

    }

    /**

     * Store a key/value array of metadata at the given path.

     * WARNING: This operation overwrites any metadata that is located at

     * $destinationPath.

     *

     * @param  string $destinationPath

     * @param  array $options

     * @return void

     */

    public function storeMetadata($destinationPath, $metadata, $options = array()) 

    {

        require_once 'Zend/Cloud/OperationNotAvailableException.php';

        throw new Zend_Cloud_OperationNotAvailableException('Storing metadata not implemented');

    }

    /**

     * Delete a key/value array of metadata at the given path.

     *

     * @param  string $path

     * @param  array $options

     * @return void

     */

    public function deleteMetadata($path) 

    {

        require_once 'Zend/Cloud/OperationNotAvailableException.php';

        throw new Zend_Cloud_OperationNotAvailableException('Deleting metadata not implemented');

    }

    /**

     * Return the full path for the file.

     * 

     * @param string $path

     * @return string

     */

    private function _getFullPath($path) 

    {

        return $this->_directory . DIRECTORY_SEPARATOR . $path;

    }

    /**

     * Get the concrete client.

     * @return strings

     */

    public function getClient()

    {

         return $this->_directory;       

    }

}