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;

	}

}