<?php

/*

 * This file is part of SwiftMailer.

 * (c) 2004-2009 Chris Corbyn

 *

 * For the full copyright and license information, please view the LICENSE

 * file that was distributed with this source code.

 */

/**

 * Writes data to a KeyCache using a stream.

 * @package Swift

 * @subpackage KeyCache

 * @author Chris Corbyn

 */

class Swift_KeyCache_SimpleKeyCacheInputStream

  implements Swift_KeyCache_KeyCacheInputStream

{

  /** The KeyCache being written to */

  private $_keyCache;

  /** The nsKey of the KeyCache being written to */

  private $_nsKey;

  /** The itemKey of the KeyCache being written to */

  private $_itemKey;

  /** A stream to write through on each write() */

  private $_writeThrough = null;

  /**

   * Set the KeyCache to wrap.

   * @param Swift_KeyCache $keyCache

   */

  public function setKeyCache(Swift_KeyCache $keyCache)

  {

    $this->_keyCache = $keyCache;

  }

  /**

   * Specify a stream to write through for each write().

   * @param Swift_InputByteStream $is

   */

  public function setWriteThroughStream(Swift_InputByteStream $is)

  {

    $this->_writeThrough = $is;

  }

  /**

   * Writes $bytes to the end of the stream.

   * @param string $bytes

   * @param Swift_InputByteStream $is, optional

   */

  public function write($bytes, Swift_InputByteStream $is = null)

  {

    $this->_keyCache->setString(

      $this->_nsKey, $this->_itemKey, $bytes, Swift_KeyCache::MODE_APPEND

      );

    if (isset($is))

    {

      $is->write($bytes);

    }

    if (isset($this->_writeThrough))

    {

      $this->_writeThrough->write($bytes);

    }

  }

  /**

   * Not used.

   */

  public function commit()

  {

  }

  /**

   * Not used.

   */

  public function bind(Swift_InputByteStream $is)

  {

  }

  /**

   * Not used.

   */

  public function unbind(Swift_InputByteStream $is)

  {

  }

  /**

   * Flush the contents of the stream (empty it) and set the internal pointer

   * to the beginning.

   */

  public function flushBuffers()

  {

    $this->_keyCache->clearKey($this->_nsKey, $this->_itemKey);

  }

  /**

   * Set the nsKey which will be written to.

   * @param string $nsKey

   */

  public function setNsKey($nsKey)

  {

    $this->_nsKey = $nsKey;

  }

  /**

   * Set the itemKey which will be written to.

   * @param string $itemKey

   */

  public function setItemKey($itemKey)

  {

    $this->_itemKey = $itemKey;

  }

  /**

   * Any implementation should be cloneable, allowing the clone to access a

   * separate $nsKey and $itemKey.

   */

  public function __clone()

  {

    $this->_writeThrough = null;

  }

}