/**
* Encode a variable
*
* @param mixed $var
* @return string
* @uses Zend_BitTorrent_Encoder::encode()
*/
public static function encode($var)
{
return Zend_BitTorrent_Encoder::encode($var);
}
/**
* Decode an encoded PHP associative array
*
* @param string $dictionary
* @return array
* @uses Zend_BitTorrent_Decoder::decodeString()
* @uses Zend_BitTorrent_Decoder::decode()
* @throws Zend_BitTorrent_Decoder_Exception
*/
public static function decodeDictionary($dictionary)
{
if ($dictionary[0] !== 'd') {
/** @see Zend_BitTorrent_Decoder_Exception */
require_once 'Zend/BitTorrent/Decoder/Exception.php';
throw new Zend_BitTorrent_Decoder_Exception('Parameter is not an encoded dictionary.');
}
$length = strlen($dictionary);
$ret = array();
$i = 1;
while ($i < $length) {
if ($dictionary[$i] === 'e') {
break;
}
$keyPart = substr($dictionary, $i);
$key = self::decodeString($keyPart);
$keyPartLength = strlen(Zend_BitTorrent_Encoder::encodeString($key));
$valuePart = substr($dictionary, $i + $keyPartLength);
$value = self::decode($valuePart);
$valuePartLength = strlen(Zend_BitTorrent_Encoder::encode($value));
$ret[$key] = $value;
$i += $keyPartLength + $valuePartLength;
}
return $ret;
}
/**
* Save the current torrent object to the filename specified
*
* This method will save the current object to a file. If the file specified exists it will be overwritten.
*
* @param string $filename
* @throws Zend_BitTorrent_Torrent_Exception
* @return Zend_BitTorrent_Torrent
*/
public function save($filename)
{
/* Build the torrent if it is not yet built */
if (!$this->isBuilt) {
$this->build();
}
/* Open the file if it is writeable */
if (!is_writeable($filename)) {
/** @see Zend_BitTorrent_Torrent_Exception */
require_once 'Zend/BitTorrent/Torrent/Exception.php';
throw new Zend_BitTorrent_Torrent_Exception('Could not open file "' . $filename . '" for writing.');
}
/* Open file for writing */
$fp = fopen($filename, 'wb');
$torrent = array('announce' => $this->getAnnounce(), 'creation date' => $this->getCreationDate(), 'info' => $this->getInfo());
if (($comment = $this->getComment()) !== null) {
$torrent['comment'] = $comment;
}
if (($createdBy = $this->getCreatedBy()) !== null) {
$torrent['created by'] = $createdBy;
}
/* Create the encoded dictionary */
$dictionary = Zend_BitTorrent_Encoder::encodeDictionary($torrent);
/* Write the encoded data to the file */
fwrite($fp, $dictionary, strlen($dictionary));
/* Close the file handle */
fclose($fp);
return $this;
}
