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<?php
namespace Sabre\DAV;
/**
* Collection class
*
* This is a helper class, that should aid in getting collections classes setup.
* Most of its methods are implemented, and throw permission denied exceptions
*
* @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
* @author Evert Pot (http://evertpot.com/)
* @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
*/
abstract class Collection extends Node implements ICollection {
/**
* Returns a child object, by its name.
*
* This method makes use of the getChildren method to grab all the child
* nodes, and compares the name.
* Generally its wise to override this, as this can usually be optimized
*
* This method must throw Sabre\DAV\Exception\NotFound if the node does not
* exist.
*
* @param string $name
* @throws Exception\NotFound
* @return INode
*/
public function getChild($name) {
foreach($this->getChildren() as $child) {
if ($child->getName()==$name) return $child;
}
throw new Exception\NotFound('File not found: ' . $name);
}
/**
* Checks is a child-node exists.
*
* It is generally a good idea to try and override this. Usually it can be optimized.
*
* @param string $name
* @return bool
*/
public function childExists($name) {
try {
$this->getChild($name);
return true;
} catch(Exception\NotFound $e) {
return false;
}
}
/**
* Creates a new file in the directory
*
* Data will either be supplied as a stream resource, or in certain cases
* as a string. Keep in mind that you may have to support either.
*
* After succesful creation of the file, you may choose to return the ETag
* of the new file here.
*
* The returned ETag must be surrounded by double-quotes (The quotes should
* be part of the actual string).
*
* If you cannot accurately determine the ETag, you should not return it.
* If you don't store the file exactly as-is (you're transforming it
* somehow) you should also not return an ETag.
*
* This means that if a subsequent GET to this new file does not exactly
* return the same contents of what was submitted here, you are strongly
* recommended to omit the ETag.
*
* @param string $name Name of the file
* @param resource|string $data Initial payload
* @return null|string
*/
public function createFile($name, $data = null) {
throw new Exception\Forbidden('Permission denied to create file (filename ' . $name . ')');
}
/**
* Creates a new subdirectory
*
* @param string $name
* @throws Exception\Forbidden
* @return void
*/
public function createDirectory($name) {
throw new Exception\Forbidden('Permission denied to create directory');
}
}
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