<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Acl
* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id$
*/


/**
* @see Zend_Acl_Role_Interface
*/
#require_once 'Zend/Acl/Role/Interface.php';


/**
* @category Zend
* @package Zend_Acl
* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Acl_Role_Registry
{
/**
* Internal Role registry data storage
*
* @var array
*/
protected $_roles = array();

/**
* Adds a Role having an identifier unique to the registry
*
* The $parents parameter may be a reference to, or the string identifier for,
* a Role existing in the registry, or $parents may be passed as an array of
* these - mixing string identifiers and objects is ok - to indicate the Roles
* from which the newly added Role will directly inherit.
*
* In order to resolve potential ambiguities with conflicting rules inherited
* from different parents, the most recently added parent takes precedence over
* parents that were previously added. In other words, the first parent added
* will have the least priority, and the last parent added will have the
* highest priority.
*
* @param Zend_Acl_Role_Interface $role
* @param Zend_Acl_Role_Interface|string|array $parents
* @throws Zend_Acl_Role_Registry_Exception
* @return Zend_Acl_Role_Registry Provides a fluent interface
*/
public function add(Zend_Acl_Role_Interface $role, $parents = null)
{
$roleId = $role->getRoleId();

if ($this->has($roleId)) {
/**
* @see Zend_Acl_Role_Registry_Exception
*/
#require_once 'Zend/Acl/Role/Registry/Exception.php';
throw new Zend_Acl_Role_Registry_Exception("Role id '$roleId' already exists in the registry");
}

$roleParents = array();

if (null !== $parents) {
if (!is_array($parents)) {
$parents = array($parents);
}
/**
* @see Zend_Acl_Role_Registry_Exception
*/
#require_once 'Zend/Acl/Role/Registry/Exception.php';
foreach ($parents as $parent) {
try {
if ($parent instanceof Zend_Acl_Role_Interface) {
$roleParentId = $parent->getRoleId();
} else {
$roleParentId = $parent;
}
$roleParent = $this->get($roleParentId);
} catch (Zend_Acl_Role_Registry_Exception $e) {
throw new Zend_Acl_Role_Registry_Exception("Parent Role id '$roleParentId' does not exist", 0, $e);
}
$roleParents[$roleParentId] = $roleParent;
$this->_roles[$roleParentId]['children'][$roleId] = $role;
}
}

$this->_roles[$roleId] = array(
'instance' => $role,
'parents' => $roleParents,
'children' => array()
);

return $this;
}

/**
* Returns the identified Role
*
* The $role parameter can either be a Role or a Role identifier.
*
* @param Zend_Acl_Role_Interface|string $role
* @throws Zend_Acl_Role_Registry_Exception
* @return Zend_Acl_Role_Interface
*/
public function get($role)
{
if ($role instanceof Zend_Acl_Role_Interface) {
$roleId = $role->getRoleId();
} else {
$roleId = (string) $role;
}

if (!$this->has($role)) {
/**
* @see Zend_Acl_Role_Registry_Exception
*/
#require_once 'Zend/Acl/Role/Registry/Exception.php';
throw new Zend_Acl_Role_Registry_Exception("Role '$roleId' not found");
}

return $this->_roles[$roleId]['instance'];
}

/**
* Returns true if and only if the Role exists in the registry
*
* The $role parameter can either be a Role or a Role identifier.
*
* @param Zend_Acl_Role_Interface|string $role
* @return boolean
*/
public function has($role)
{
if ($role instanceof Zend_Acl_Role_Interface) {
$roleId = $role->getRoleId();
} else {
$roleId = (string) $role;
}

return isset($this->_roles[$roleId]);
}

/**
* Returns an array of an existing Role's parents
*
* The array keys are the identifiers of the parent Roles, and the values are
* the parent Role instances. The parent Roles are ordered in this array by
* ascending priority. The highest priority parent Role, last in the array,
* corresponds with the parent Role most recently added.
*
* If the Role does not have any parents, then an empty array is returned.
*
* @param Zend_Acl_Role_Interface|string $role
* @uses Zend_Acl_Role_Registry::get()
* @return array
*/
public function getParents($role)
{
$roleId = $this->get($role)->getRoleId();

return $this->_roles[$roleId]['parents'];
}

/**
* Returns true if and only if $role inherits from $inherit
*
* Both parameters may be either a Role or a Role identifier. If
* $onlyParents is true, then $role must inherit directly from
* $inherit in order to return true. By default, this method looks
* through the entire inheritance DAG to determine whether $role
* inherits from $inherit through its ancestor Roles.
*
* @param Zend_Acl_Role_Interface|string $role
* @param Zend_Acl_Role_Interface|string $inherit
* @param boolean $onlyParents
* @throws Zend_Acl_Role_Registry_Exception
* @return boolean
*/
public function inherits($role, $inherit, $onlyParents = false)
{
/**
* @see Zend_Acl_Role_Registry_Exception
*/
#require_once 'Zend/Acl/Role/Registry/Exception.php';
try {
$roleId = $this->get($role)->getRoleId();
$inheritId = $this->get($inherit)->getRoleId();
} catch (Zend_Acl_Role_Registry_Exception $e) {
throw new Zend_Acl_Role_Registry_Exception($e->getMessage(), $e->getCode(), $e);
}

$inherits = isset($this->_roles[$roleId]['parents'][$inheritId]);

if ($inherits || $onlyParents) {
return $inherits;
}

foreach ($this->_roles[$roleId]['parents'] as $parentId => $parent) {
if ($this->inherits($parentId, $inheritId)) {
return true;
}
}

return false;
}

/**
* Removes the Role from the registry
*
* The $role parameter can either be a Role or a Role identifier.
*
* @param Zend_Acl_Role_Interface|string $role
* @throws Zend_Acl_Role_Registry_Exception
* @return Zend_Acl_Role_Registry Provides a fluent interface
*/
public function remove($role)
{
/**
* @see Zend_Acl_Role_Registry_Exception
*/
#require_once 'Zend/Acl/Role/Registry/Exception.php';
try {
$roleId = $this->get($role)->getRoleId();
} catch (Zend_Acl_Role_Registry_Exception $e) {
throw new Zend_Acl_Role_Registry_Exception($e->getMessage(), $e->getCode(), $e);
}

foreach ($this->_roles[$roleId]['children'] as $childId => $child) {
unset($this->_roles[$childId]['parents'][$roleId]);
}
foreach ($this->_roles[$roleId]['parents'] as $parentId => $parent) {
unset($this->_roles[$parentId]['children'][$roleId]);
}

unset($this->_roles[$roleId]);

return $this;
}

/**
* Removes all Roles from the registry
*
* @return Zend_Acl_Role_Registry Provides a fluent interface
*/
public function removeAll()
{
$this->_roles = array();

return $this;
}

public function getRoles()
{
return $this->_roles;
}

}