<?php
/* $Id$ */
namespace Mammut\Document\Mime;

(defined('MAMMUT') && (basename(__FILE__) != basename($_SERVER['PHP_SELF']))) or die('ACCESS DENIED');

/**
 * 
 *
 * @author Stefan Daurer <s.daurer@q-spot.org>
 * @package Mammut\Documents
 */
class Part extends \Zend\Mime\Part {
	
	/**
	 * Mammut IO handler
	 * @var boolean true if the content is linked via Mammut\IO classes
	 */
	private $isMIO = false;
	
	/**
	 * create a new Mime Part.
	 * The (unencoded) content of the Part as passed
	 * as a string or stream
	 *
	 * @param mixed $content  Mammut\IO, String or Stream containing the content
	 */
	public function __construct($content){
		$this->content = $content;
		if (is_resource($content)) {
			$this->isStream = true;
		}
	}
	
	/**
	 * if this was created with a stream, return a filtered stream for
	 * reading the content. very useful for large file attachments.
	 *
	 * @param string $EOL
	 * @return mixed
	 * @throws \RuntimeException if not a stream or unable to append filter
	 */
	public function getEncodedStream($EOL = Mime::LINEEND)
	{
		if (!$this->isStream) {
			throw new \RuntimeException('Attempt to get a stream from a string part');
		}
	
		//stream_filter_remove(); // ??? is that right?
		switch ($this->encoding) {
			case Mime::ENCODING_QUOTEDPRINTABLE:
				$filter = stream_filter_append(
				$this->content,
				'convert.quoted-printable-encode',
				STREAM_FILTER_READ,
				array(
				'line-length'      => 76,
				'line-break-chars' => $EOL
				)
				);
				if (!is_resource($filter)) {
					throw new \RuntimeException('Failed to append quoted-printable filter');
				}
				break;
			case Mime::ENCODING_BASE64:
				$filter = stream_filter_append(
				$this->content,
				'convert.base64-encode',
				STREAM_FILTER_READ,
				array(
				'line-length'      => 76,
				'line-break-chars' => $EOL
				)
				);
				if (!is_resource($filter)) {
					throw new \RuntimeException('Failed to append base64 filter');
				}
				break;
			default:
		}
		return $this->content;
	}
	
	/**
	 * Get the Content of the current Mime Part in the given encoding.
	 *
	 * @param string $EOL
	 * @return string
	 */
	public function getContent($EOL = Mime::LINEEND)
	{
		if ($this->isStream) {
			return stream_get_contents($this->getEncodedStream($EOL));
		}
		return Mime::encode($this->content, $this->encoding, $EOL);
	}
	
	/**
	 * Get the RAW unencoded content from this part
	 * @return string
	 */
	public function getRawContent()
	{
		if ($this->isStream) {
			return stream_get_contents($this->content);
		}
		return $this->content;
	}

}