pictcode

<?php

/**

 * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)

 * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)

 *

 * Licensed under The MIT License

 * For full copyright and license information, please see the LICENSE.txt

 * Redistributions of files must retain the above copyright notice.

 *

 * @copyright     Copyright (c) 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       http://www.opensource.org/licenses/mit-license.php MIT License

 */

App::uses('AppModel', 'Model');

/**

 * Permissions linking AROs with ACOs

 *

 * @package       Cake.Model

 */

class Permission extends AppModel {

/**

 * Explicitly disable in-memory query caching

 *

 * @var bool

 */

        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 bool Success (true if ARO has access to action in ACO, false otherwise)

 */

        public function check($aro, $aco, $action = '*') {

                if (!$aro || !$aco) {

                        return false;

                }

                $permKeys = $this->getAcoKeys($this->schema());

                $aroPath = $this->Aro->node($aro);

                $acoPath = $this->Aco->node($aco);

                if (!$aroPath) {

                        $this->log(__d('cake_dev',

                                        "%s - Failed ARO node lookup in permissions check. Node references:\nAro: %s\nAco: %s",

                                        'DbAcl::check()',

                                        print_r($aro, true),

                                        print_r($aco, true)),

                                E_USER_WARNING

                        );

                        return false;

                }

                if (!$acoPath) {

                        $this->log(__d('cake_dev',

                                        "%s - Failed ACO node lookup in permissions check. Node references:\nAro: %s\nAco: %s",

                                        'DbAcl::check()',

                                        print_r($aro, true),

                                        print_r($aco, true)),

                                E_USER_WARNING

                        );

                        return false;

                }

                if ($action !== '*' && !in_array('_' . $action, $permKeys)) {

                        $this->log(__d('cake_dev', "ACO permissions key %s does not exist in %s", $action, 'DbAcl::check()'), 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;

                        }

                        $perms = Hash::extract($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 *) Invalid permissions will result in an exception

 * @param int $value Value to indicate access type (1 to give access, -1 to deny, 0 to inherit)

 * @return bool Success

 * @throws AclException on Invalid permission key.

 */

        public function allow($aro, $aco, $actions = '*', $value = 1) {

                $perms = $this->getAclLink($aro, $aco);

                $permKeys = $this->getAcoKeys($this->schema());

                $save = array();

                if (!$perms) {

                        $this->log(__d('cake_dev', '%s - Invalid node', 'DbAcl::allow()'), 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);

                        }

                        foreach ($actions as $action) {

                                if ($action{0} !== '_') {

                                        $action = '_' . $action;

                                }

                                if (!in_array($action, $permKeys, true)) {

                                        throw new AclException(__d('cake_dev', 'Invalid permission key "%s"', $action));

                                }

                                $save[$action] = $value;

                        }

                }

                list($save['aro_id'], $save['aco_id']) = array($perms['aro'], $perms['aco']);

                if ($perms['link'] && !empty($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;

        }

}