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<?php
/**
* PHP Reader Library
*
* Copyright (c) 2008 The PHP Reader Project Workgroup. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - Neither the name of the project workgroup nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* @package php-reader
* @subpackage ID3
* @copyright Copyright (c) 2008 The PHP Reader Project Workgroup
* @license http://code.google.com/p/php-reader/wiki/License New BSD License
* @version $Id: GRID.php 105 2008-07-30 14:56:47Z svollbehr $
*/
/**#@+ @ignore */
require_once("ID3/Frame.php");
/**#@-*/
/**
* The <i>Group identification registration</i> frame enables grouping of
* otherwise unrelated frames. This can be used when some frames are to be
* signed. To identify which frames belongs to a set of frames a group
* identifier must be registered in the tag with this frame.
*
* The owner identifier is a URL containing an email address, or a link to a
* location where an email address can be found, that belongs to the
* organisation responsible for this grouping. Questions regarding the grouping
* should be sent to the indicated email address.
*
* The group symbol contains a value that associates the frame with this group
* throughout the whole tag, in the range $80-F0. All other values are reserved.
* The group symbol may optionally be followed by some group specific data, e.g.
* a digital signature. There may be several GRID frames in a tag but only one
* containing the same symbol and only one containing the same owner identifier.
* The group symbol must be used somewhere in the tag. See
* {@link ID3_Frame#GROUPING_ownerENTITY} for more information.
*
* @package php-reader
* @subpackage ID3
* @author Sven Vollbehr <svollbehr@gmail.com>
* @author Ryan Butterfield <buttza@gmail.com>
* @copyright Copyright (c) 2008 The PHP Reader Project Workgroup
* @license http://code.google.com/p/php-reader/wiki/License New BSD License
* @version $Rev: 105 $
*/
final class ID3_Frame_GRID extends ID3_Frame
{
/** @var string */
private $_owner;
/** @var integer */
private $_group;
/** @var string */
private $_groupData;
/**
* Constructs the class with given parameters and parses object related data.
*
* @param Reader $reader The reader object.
* @param Array $options The options array.
*/
public function __construct($reader = null, &$options = array())
{
parent::__construct($reader, $options);
if ($reader === null)
return;
list($this->_owner, $this->_data) = $this->explodeString8($this->_data, 2);
$this->_group = Transform::fromUInt8($this->_data[0]);
$this->_groupData = substr($this->_data, 1);
}
/**
* Returns the owner identifier string.
*
* @return string
*/
public function getOwner() { return $this->_owner; }
/**
* Sets the owner identifier string.
*
* @param string $owner The owner identifier string.
*/
public function setOwner($owner) { $this->_owner = $owner; }
/**
* Returns the group symbol.
*
* @return integer
*/
public function getGroup() { return $this->_group; }
/**
* Sets the group symbol.
*
* @param integer $group The group symbol.
*/
public function setGroup($group) { $this->_group = $group; }
/**
* Returns the group dependent data.
*
* @return string
*/
public function getGroupData() { return $this->_groupData; }
/**
* Sets the group dependent data.
*
* @param string $groupData The data.
*/
public function setGroupData($groupData) { $this->_groupData = $groupData; }
/**
* Returns the frame raw data.
*
* @return string
*/
public function __toString()
{
parent::setData
($this->_owner . "\0" . Transform::toUInt8($this->_group) .
$this->_groupData);
return parent::__toString();
}
}
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