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<?php
/**
*
* PHP 5
*
* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
* Copyright 2005-2012, Cake Software Foundation, Inc. (http://cakefoundation.org)
*
* Licensed under The MIT License
* Redistributions of files must retain the above copyright notice.
*
* @copyright Copyright 2005-2012, Cake Software Foundation, Inc. (http://cakefoundation.org)
* @link http://cakephp.org CakePHP(tm) Project
* @package Cake.Model
* @since CakePHP(tm) v 0.2.9
* @license MIT License (http://www.opensource.org/licenses/mit-license.php)
*/
App::uses('AppModel', 'Model');
/**
* Permissions linking AROs with ACOs
*
* @package Cake.Model
*/
class Permission extends AppModel {
/**
* Model name
*
* @var string
*/
public $name = 'Permission';
/**
* Explicitly disable in-memory query caching
*
* @var boolean
*/
public $cacheQueries = false;
/**
* Override default table name
*
* @var string
*/
public $useTable = 'aros_acos';
/**
* Permissions link AROs with ACOs
*
* @var array
*/
public $belongsTo = array('Aro', 'Aco');
/**
* No behaviors for this model
*
* @var array
*/
public $actsAs = null;
/**
* Constructor, used to tell this model to use the
* database configured for ACL
*/
public function __construct() {
$config = Configure::read('Acl.database');
if (!empty($config)) {
$this->useDbConfig = $config;
}
parent::__construct();
}
/**
* Checks if the given $aro has access to action $action in $aco
*
* @param string $aro ARO The requesting object identifier.
* @param string $aco ACO The controlled object identifier.
* @param string $action Action (defaults to *)
* @return boolean Success (true if ARO has access to action in ACO, false otherwise)
*/
public function check($aro, $aco, $action = "*") {
if ($aro == null || $aco == null) {
return false;
}
$permKeys = $this->getAcoKeys($this->schema());
$aroPath = $this->Aro->node($aro);
$acoPath = $this->Aco->node($aco);
if (empty($aroPath) || empty($acoPath)) {
trigger_error(__d('cake_dev', "DbAcl::check() - Failed ARO/ACO node lookup in permissions check. Node references:\nAro: ") . print_r($aro, true) . "\nAco: " . print_r($aco, true), E_USER_WARNING);
return false;
}
if ($acoPath == null || $acoPath == array()) {
trigger_error(__d('cake_dev', "DbAcl::check() - Failed ACO node lookup in permissions check. Node references:\nAro: ") . print_r($aro, true) . "\nAco: " . print_r($aco, true), E_USER_WARNING);
return false;
}
if ($action != '*' && !in_array('_' . $action, $permKeys)) {
trigger_error(__d('cake_dev', "ACO permissions key %s does not exist in DbAcl::check()", $action), E_USER_NOTICE);
return false;
}
$inherited = array();
$acoIDs = Hash::extract($acoPath, '{n}.' . $this->Aco->alias . '.id');
$count = count($aroPath);
for ($i = 0; $i < $count; $i++) {
$permAlias = $this->alias;
$perms = $this->find('all', array(
'conditions' => array(
"{$permAlias}.aro_id" => $aroPath[$i][$this->Aro->alias]['id'],
"{$permAlias}.aco_id" => $acoIDs
),
'order' => array($this->Aco->alias . '.lft' => 'desc'),
'recursive' => 0
));
if (empty($perms)) {
continue;
} else {
$perms = Hash::extract($perms, '{n}.' . $this->alias);
foreach ($perms as $perm) {
if ($action == '*') {
foreach ($permKeys as $key) {
if (!empty($perm)) {
if ($perm[$key] == -1) {
return false;
} elseif ($perm[$key] == 1) {
$inherited[$key] = 1;
}
}
}
if (count($inherited) === count($permKeys)) {
return true;
}
} else {
switch ($perm['_' . $action]) {
case -1:
return false;
case 0:
continue;
case 1:
return true;
}
}
}
}
}
return false;
}
/**
* Allow $aro to have access to action $actions in $aco
*
* @param string $aro ARO The requesting object identifier.
* @param string $aco ACO The controlled object identifier.
* @param string $actions Action (defaults to *)
* @param integer $value Value to indicate access type (1 to give access, -1 to deny, 0 to inherit)
* @return boolean Success
*/
public function allow($aro, $aco, $actions = "*", $value = 1) {
$perms = $this->getAclLink($aro, $aco);
$permKeys = $this->getAcoKeys($this->schema());
$save = array();
if ($perms == false) {
trigger_error(__d('cake_dev', 'DbAcl::allow() - Invalid node'), E_USER_WARNING);
return false;
}
if (isset($perms[0])) {
$save = $perms[0][$this->alias];
}
if ($actions == "*") {
$save = array_combine($permKeys, array_pad(array(), count($permKeys), $value));
} else {
if (!is_array($actions)) {
$actions = array('_' . $actions);
}
if (is_array($actions)) {
foreach ($actions as $action) {
if ($action{0} != '_') {
$action = '_' . $action;
}
if (in_array($action, $permKeys)) {
$save[$action] = $value;
}
}
}
}
list($save['aro_id'], $save['aco_id']) = array($perms['aro'], $perms['aco']);
if ($perms['link'] != null && !empty($perms['link'])) {
$save['id'] = $perms['link'][0][$this->alias]['id'];
} else {
unset($save['id']);
$this->id = null;
}
return ($this->save($save) !== false);
}
/**
* Get an array of access-control links between the given Aro and Aco
*
* @param string $aro ARO The requesting object identifier.
* @param string $aco ACO The controlled object identifier.
* @return array Indexed array with: 'aro', 'aco' and 'link'
*/
public function getAclLink($aro, $aco) {
$obj = array();
$obj['Aro'] = $this->Aro->node($aro);
$obj['Aco'] = $this->Aco->node($aco);
if (empty($obj['Aro']) || empty($obj['Aco'])) {
return false;
}
$aro = Hash::extract($obj, 'Aro.0.' . $this->Aro->alias . '.id');
$aco = Hash::extract($obj, 'Aco.0.' . $this->Aco->alias . '.id');
$aro = current($aro);
$aco = current($aco);
return array(
'aro' => $aro,
'aco' => $aco,
'link' => $this->find('all', array('conditions' => array(
$this->alias . '.aro_id' => $aro,
$this->alias . '.aco_id' => $aco
)))
);
}
/**
* Get the crud type keys
*
* @param array $keys Permission schema
* @return array permission keys
*/
public function getAcoKeys($keys) {
$newKeys = array();
$keys = array_keys($keys);
foreach ($keys as $key) {
if (!in_array($key, array('id', 'aro_id', 'aco_id'))) {
$newKeys[] = $key;
}
}
return $newKeys;
}
}
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