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Principal.php
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Principal.php
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<?php
namespace Sabre\DAVACL\Xml\Property;
use Sabre\DAV;
use Sabre\DAV\Browser\HtmlOutputHelper;
use Sabre\DAV\Exception\BadRequest;
use Sabre\Xml\Reader;
use Sabre\Xml\Writer;
/**
* Principal property
*
* The principal property represents a principal from RFC3744 (ACL).
* The property can be used to specify a principal or pseudo principals.
*
* @copyright Copyright (C) 2007-2015 fruux GmbH (https://fruux.com/).
* @author Evert Pot (http://evertpot.com/)
* @license http://sabre.io/license/ Modified BSD License
*/
class Principal extends DAV\Xml\Property\Href {
/**
* To specify a not-logged-in user, use the UNAUTHENTICATED principal
*/
const UNAUTHENTICATED = 1;
/**
* To specify any principal that is logged in, use AUTHENTICATED
*/
const AUTHENTICATED = 2;
/**
* Specific principals can be specified with the HREF
*/
const HREF = 3;
/**
* Everybody, basically
*/
const ALL = 4;
/**
* Principal-type
*
* Must be one of the UNAUTHENTICATED, AUTHENTICATED or HREF constants.
*
* @var int
*/
protected $type;
/**
* Creates the property.
*
* The 'type' argument must be one of the type constants defined in this class.
*
* 'href' is only required for the HREF type.
*
* @param int $type
* @param string|null $href
*/
function __construct($type, $href = null) {
$this->type = $type;
if ($type === self::HREF && is_null($href)) {
throw new DAV\Exception('The href argument must be specified for the HREF principal type.');
}
if ($href) {
$href = rtrim($href, '/') . '/';
parent::__construct($href);
}
}
/**
* Returns the principal type
*
* @return int
*/
function getType() {
return $this->type;
}
/**
* The xmlSerialize metod is called during xml writing.
*
* Use the $writer argument to write its own xml serialization.
*
* An important note: do _not_ create a parent element. Any element
* implementing XmlSerializble should only ever write what's considered
* its 'inner xml'.
*
* The parent of the current element is responsible for writing a
* containing element.
*
* This allows serializers to be re-used for different element names.
*
* If you are opening new elements, you must also close them again.
*
* @param Writer $writer
* @return void
*/
function xmlSerialize(Writer $writer) {
switch ($this->type) {
case self::UNAUTHENTICATED :
$writer->writeElement('{DAV:}unauthenticated');
break;
case self::AUTHENTICATED :
$writer->writeElement('{DAV:}authenticated');
break;
case self::HREF :
parent::xmlSerialize($writer);
break;
case self::ALL :
$writer->writeElement('{DAV:}all');
break;
}
}
/**
* Generate html representation for this value.
*
* The html output is 100% trusted, and no effort is being made to sanitize
* it. It's up to the implementor to sanitize user provided values.
*
* The output must be in UTF-8.
*
* The baseUri parameter is a url to the root of the application, and can
* be used to construct local links.
*
* @param HtmlOutputHelper $html
* @return string
*/
function toHtml(HtmlOutputHelper $html) {
switch ($this->type) {
case self::UNAUTHENTICATED :
return '<em>unauthenticated</em>';
case self::AUTHENTICATED :
return '<em>authenticated</em>';
case self::HREF :
return parent::toHtml($html);
case self::ALL :
return '<em>all</em>';
}
}
/**
* The deserialize method is called during xml parsing.
*
* This method is called staticly, this is because in theory this method
* may be used as a type of constructor, or factory method.
*
* Often you want to return an instance of the current class, but you are
* free to return other data as well.
*
* Important note 2: You are responsible for advancing the reader to the
* next element. Not doing anything will result in a never-ending loop.
*
* If you just want to skip parsing for this element altogether, you can
* just call $reader->next();
*
* $reader->parseInnerTree() will parse the entire sub-tree, and advance to
* the next element.
*
* @param Reader $reader
* @return mixed
*/
static function xmlDeserialize(Reader $reader) {
$tree = $reader->parseInnerTree()[0];
switch ($tree['name']) {
case '{DAV:}unauthenticated' :
return new self(self::UNAUTHENTICATED);
case '{DAV:}authenticated' :
return new self(self::AUTHENTICATED);
case '{DAV:}href':
return new self(self::HREF, $tree['value']);
case '{DAV:}all':
return new self(self::ALL);
default :
throw new BadRequest('Unknown or unsupported principal type: ' . $tree['name']);
}
}
}

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