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<?php
/**
* CAuthItem class file.
*
* @author Qiang Xue <[email protected]>
* @link http://www.yiiframework.com/
* @copyright Copyright © 2008-2011 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
/**
* CAuthItem represents an authorization item.
* An authorization item can be an operation, a task or a role.
* They form an authorization hierarchy. Items on higher levels of the hierarchy
* inherit the permissions represented by items on lower levels.
* A user may be assigned one or several authorization items (called {@link CAuthAssignment assignments}.
* He can perform an operation only when it is among his assigned items.
*
* @property IAuthManager $authManager The authorization manager.
* @property integer $type The authorization item type. This could be 0 (operation), 1 (task) or 2 (role).
* @property string $name The item name.
* @property string $description The item description.
* @property string $bizRule The business rule associated with this item.
* @property mixed $data The additional data associated with this item.
* @property array $children All child items of this item.
*
* @author Qiang Xue <[email protected]>
* @package system.web.auth
* @since 1.0
*/
class CAuthItem extends CComponent
{
const TYPE_OPERATION=0;
const TYPE_TASK=1;
const TYPE_ROLE=2;
private $_auth;
private $_type;
private $_name;
private $_description;
private $_bizRule;
private $_data;
/**
* Constructor.
* @param IAuthManager $auth authorization manager
* @param string $name authorization item name
* @param integer $type authorization item type. This can be 0 (operation), 1 (task) or 2 (role).
* @param string $description the description
* @param string $bizRule the business rule associated with this item
* @param mixed $data additional data for this item
*/
public function __construct($auth,$name,$type,$description='',$bizRule=null,$data=null)
{
$this->_type=(int)$type;
$this->_auth=$auth;
$this->_name=$name;
$this->_description=$description;
$this->_bizRule=$bizRule;
$this->_data=$data;
}
/**
* Checks to see if the specified item is within the hierarchy starting from this item.
* This method is expected to be internally used by the actual implementations
* of the {@link IAuthManager::checkAccess}.
* @param string $itemName the name of the item to be checked
* @param array $params the parameters to be passed to business rule evaluation
* @return boolean whether the specified item is within the hierarchy starting from this item.
*/
public function checkAccess($itemName,$params=array())
{
Yii::trace('Checking permission "'.$this->_name.'"','system.web.auth.CAuthItem');
if($this->_auth->executeBizRule($this->_bizRule,$params,$this->_data))
{
if($this->_name==$itemName)
return true;
foreach($this->_auth->getItemChildren($this->_name) as $item)
{
if($item->checkAccess($itemName,$params))
return true;
}
}
return false;
}
/**
* @return IAuthManager the authorization manager
*/
public function getAuthManager()
{
return $this->_auth;
}
/**
* @return integer the authorization item type. This could be 0 (operation), 1 (task) or 2 (role).
*/
public function getType()
{
return $this->_type;
}
/**
* @return string the item name
*/
public function getName()
{
return $this->_name;
}
/**
* @param string $value the item name
*/
public function setName($value)
{
if($this->_name!==$value)
{
$oldName=$this->_name;
$this->_name=$value;
$this->_auth->saveAuthItem($this,$oldName);
}
}
/**
* @return string the item description
*/
public function getDescription()
{
return $this->_description;
}
/**
* @param string $value the item description
*/
public function setDescription($value)
{
if($this->_description!==$value)
{
$this->_description=$value;
$this->_auth->saveAuthItem($this);
}
}
/**
* @return string the business rule associated with this item
*/
public function getBizRule()
{
return $this->_bizRule;
}
/**
* @param string $value the business rule associated with this item
*/
public function setBizRule($value)
{
if($this->_bizRule!==$value)
{
$this->_bizRule=$value;
$this->_auth->saveAuthItem($this);
}
}
/**
* @return mixed the additional data associated with this item
*/
public function getData()
{
return $this->_data;
}
/**
* @param mixed $value the additional data associated with this item
*/
public function setData($value)
{
if($this->_data!==$value)
{
$this->_data=$value;
$this->_auth->saveAuthItem($this);
}
}
/**
* Adds a child item.
* @param string $name the name of the child item
* @return boolean whether the item is added successfully
* @throws CException if either parent or child doesn't exist or if a loop has been detected.
* @see IAuthManager::addItemChild
*/
public function addChild($name)
{
return $this->_auth->addItemChild($this->_name,$name);
}
/**
* Removes a child item.
* Note, the child item is not deleted. Only the parent-child relationship is removed.
* @param string $name the child item name
* @return boolean whether the removal is successful
* @see IAuthManager::removeItemChild
*/
public function removeChild($name)
{
return $this->_auth->removeItemChild($this->_name,$name);
}
/**
* Returns a value indicating whether a child exists
* @param string $name the child item name
* @return boolean whether the child exists
* @see IAuthManager::hasItemChild
*/
public function hasChild($name)
{
return $this->_auth->hasItemChild($this->_name,$name);
}
/**
* Returns the children of this item.
* @return array all child items of this item.
* @see IAuthManager::getItemChildren
*/
public function getChildren()
{
return $this->_auth->getItemChildren($this->_name);
}
/**
* Assigns this item to a user.
* @param mixed $userId the user ID (see {@link IWebUser::getId})
* @param string $bizRule the business rule to be executed when {@link checkAccess} is called
* for this particular authorization item.
* @param mixed $data additional data associated with this assignment
* @return CAuthAssignment the authorization assignment information.
* @throws CException if the item has already been assigned to the user
* @see IAuthManager::assign
*/
public function assign($userId,$bizRule=null,$data=null)
{
return $this->_auth->assign($this->_name,$userId,$bizRule,$data);
}
/**
* Revokes an authorization assignment from a user.
* @param mixed $userId the user ID (see {@link IWebUser::getId})
* @return boolean whether removal is successful
* @see IAuthManager::revoke
*/
public function revoke($userId)
{
return $this->_auth->revoke($this->_name,$userId);
}
/**
* Returns a value indicating whether this item has been assigned to the user.
* @param mixed $userId the user ID (see {@link IWebUser::getId})
* @return boolean whether the item has been assigned to the user.
* @see IAuthManager::isAssigned
*/
public function isAssigned($userId)
{
return $this->_auth->isAssigned($this->_name,$userId);
}
/**
* Returns the item assignment information.
* @param mixed $userId the user ID (see {@link IWebUser::getId})
* @return CAuthAssignment the item assignment information. Null is returned if
* this item is not assigned to the user.
* @see IAuthManager::getAuthAssignment
*/
public function getAssignment($userId)
{
return $this->_auth->getAuthAssignment($this->_name,$userId);
}
}