<?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.

 */

/**

 * Changes some global preference settings in Swift Mailer.

 * @package Swift

 * @author Chris Corbyn

 */

class Swift_Preferences

{

  /** Singleton instance */

  private static $_instance = null;

  /** Constructor not to be used */

  private function __construct() { }

  /**

   * Get a new instance of Preferences.

   * @return Swift_Preferences

   */

  public static function getInstance()

  {

    if (!isset(self::$_instance))

    {

      self::$_instance = new self();

    }

    return self::$_instance;

  }

  /**

   * Set the default charset used.

   * @param string

   * @return Swift_Preferences

   */

  public function setCharset($charset)

  {

    Swift_DependencyContainer::getInstance()

      ->register('properties.charset')->asValue($charset);

    return $this;

  }

  /**

   * Set the directory where temporary files can be saved.

   * @param string $dir

   * @return Swift_Preferences

   */

  public function setTempDir($dir)

  {

    Swift_DependencyContainer::getInstance()

      ->register('tempdir')->asValue($dir);

    return $this;

  }

  /**

   * Set the type of cache to use (i.e. "disk" or "array").

   * @param string $type

   * @return Swift_Preferences

   */

  public function setCacheType($type)

  {

    Swift_DependencyContainer::getInstance()

      ->register('cache')->asAliasOf(sprintf('cache.%s', $type));

    return $this;

  }

  /**

   * Add the

   * @param boolean $dotEscape

   */

  public function setQPDotEscape($dotEscape)

  {

    $dotEscape=!empty($dotEscape);

    Swift_DependencyContainer::getInstance()

      -> register('mime.qpcontentencoder')

      -> asNewInstanceOf('Swift_Mime_ContentEncoder_QpContentEncoder')

      -> withDependencies(array('mime.charstream', 'mime.bytecanonicalizer'))

      -> addConstructorValue($dotEscape);

    return $this;

  }

}