<?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.

 */

require_once dirname(__FILE__) . '/../HeaderEncoder.php';

require_once dirname(__FILE__) . '/../../Encoder/QpEncoder.php';

require_once dirname(__FILE__) . '/../../CharacterStream.php';

/**

 * Handles Quoted Printable (Q) Header Encoding in Swift Mailer.

 * @package Swift

 * @subpackage Mime

 * @author Chris Corbyn

 */

class Swift_Mime_HeaderEncoder_QpHeaderEncoder extends Swift_Encoder_QpEncoder

  implements Swift_Mime_HeaderEncoder

{

  /**

   * Creates a new QpHeaderEncoder for the given CharacterStream.

   * @param Swift_CharacterStream $charStream to use for reading characters

   */

  public function __construct(Swift_CharacterStream $charStream)

  {

    parent::__construct($charStream);

    // Reset the safeMap

    $this->_safeMap=array();

    foreach (array_merge(

      range(0x61, 0x7A), range(0x41, 0x5A),

      range(0x30, 0x39), array(0x20, 0x21, 0x2A, 0x2B, 0x2D, 0x2F)

      ) as $byte)

    {

      $this->_safeMap[$byte] = chr($byte);

    }

  }

  /**

   * Get the name of this encoding scheme.

   * Returns the string 'Q'.

   * @return string

   */

  public function getName()

  {

    return 'Q';

  }

  /**

   * Takes an unencoded string and produces a Q encoded string from it.

   * @param string $string to encode

   * @param int $firstLineOffset, optional

   * @param int $maxLineLength, optional, 0 indicates the default of 76 chars

   * @return string

   */

  public function encodeString($string, $firstLineOffset = 0,

    $maxLineLength = 0)

  {

    return str_replace(array(' ', '=20', "=\r\n"), array('_', '_', "\r\n"),

      parent::encodeString($string, $firstLineOffset, $maxLineLength)

      );

  }

}