Subversion Repositories SmartDukaan

<?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;
        }
}