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mareksebera
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257
lib/Cake/Model/Permission.php
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257
lib/Cake/Model/Permission.php
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<?php
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/**
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* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
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* Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
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*
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* Licensed under The MIT License
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* For full copyright and license information, please see the LICENSE.txt
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* Redistributions of files must retain the above copyright notice.
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*
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* @copyright Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
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* @link http://cakephp.org CakePHP(tm) Project
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* @package Cake.Model
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* @since CakePHP(tm) v 0.2.9
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* @license http://www.opensource.org/licenses/mit-license.php MIT License
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*/
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App::uses('AppModel', 'Model');
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/**
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* Permissions linking AROs with ACOs
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*
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* @package Cake.Model
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*/
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class Permission extends AppModel {
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/**
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* Explicitly disable in-memory query caching
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*
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* @var bool
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*/
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public $cacheQueries = false;
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/**
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* Override default table name
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*
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* @var string
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*/
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public $useTable = 'aros_acos';
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/**
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* Permissions link AROs with ACOs
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*
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* @var array
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*/
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public $belongsTo = array('Aro', 'Aco');
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/**
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* No behaviors for this model
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*
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* @var array
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*/
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public $actsAs = null;
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/**
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* Constructor, used to tell this model to use the
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* database configured for ACL
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*/
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public function __construct() {
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$config = Configure::read('Acl.database');
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if (!empty($config)) {
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$this->useDbConfig = $config;
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}
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parent::__construct();
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}
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/**
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* Checks if the given $aro has access to action $action in $aco
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*
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* @param string $aro ARO The requesting object identifier.
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* @param string $aco ACO The controlled object identifier.
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* @param string $action Action (defaults to *)
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* @return bool Success (true if ARO has access to action in ACO, false otherwise)
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*/
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public function check($aro, $aco, $action = '*') {
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if (!$aro || !$aco) {
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return false;
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}
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$permKeys = $this->getAcoKeys($this->schema());
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$aroPath = $this->Aro->node($aro);
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$acoPath = $this->Aco->node($aco);
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if (!$aroPath) {
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$this->log(__d('cake_dev',
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"%s - Failed ARO node lookup in permissions check. Node references:\nAro: %s\nAco: %s",
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'DbAcl::check()',
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print_r($aro, true),
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print_r($aco, true)),
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E_USER_WARNING
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);
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return false;
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}
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if (!$acoPath) {
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$this->log(__d('cake_dev',
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"%s - Failed ACO node lookup in permissions check. Node references:\nAro: %s\nAco: %s",
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'DbAcl::check()',
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print_r($aro, true),
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print_r($aco, true)),
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E_USER_WARNING
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);
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return false;
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}
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if ($action !== '*' && !in_array('_' . $action, $permKeys)) {
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$this->log(__d('cake_dev', "ACO permissions key %s does not exist in %s", $action, 'DbAcl::check()'), E_USER_NOTICE);
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return false;
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}
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$inherited = array();
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$acoIDs = Hash::extract($acoPath, '{n}.' . $this->Aco->alias . '.id');
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$count = count($aroPath);
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for ($i = 0; $i < $count; $i++) {
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$permAlias = $this->alias;
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$perms = $this->find('all', array(
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'conditions' => array(
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"{$permAlias}.aro_id" => $aroPath[$i][$this->Aro->alias]['id'],
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"{$permAlias}.aco_id" => $acoIDs
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),
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'order' => array($this->Aco->alias . '.lft' => 'desc'),
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'recursive' => 0
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));
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if (empty($perms)) {
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continue;
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}
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$perms = Hash::extract($perms, '{n}.' . $this->alias);
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foreach ($perms as $perm) {
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if ($action === '*') {
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foreach ($permKeys as $key) {
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if (!empty($perm)) {
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if ($perm[$key] == -1) {
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return false;
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} elseif ($perm[$key] == 1) {
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$inherited[$key] = 1;
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}
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}
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}
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if (count($inherited) === count($permKeys)) {
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return true;
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}
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} else {
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switch ($perm['_' . $action]) {
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case -1:
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return false;
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case 0:
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continue;
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case 1:
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return true;
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}
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}
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}
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}
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return false;
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}
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/**
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* Allow $aro to have access to action $actions in $aco
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*
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* @param string $aro ARO The requesting object identifier.
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* @param string $aco ACO The controlled object identifier.
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* @param string $actions Action (defaults to *) Invalid permissions will result in an exception
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* @param int $value Value to indicate access type (1 to give access, -1 to deny, 0 to inherit)
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* @return bool Success
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* @throws AclException on Invalid permission key.
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*/
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public function allow($aro, $aco, $actions = '*', $value = 1) {
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$perms = $this->getAclLink($aro, $aco);
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$permKeys = $this->getAcoKeys($this->schema());
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$save = array();
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if (!$perms) {
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$this->log(__d('cake_dev', '%s - Invalid node', 'DbAcl::allow()'), E_USER_WARNING);
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return false;
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}
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if (isset($perms[0])) {
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$save = $perms[0][$this->alias];
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}
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if ($actions === '*') {
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$save = array_combine($permKeys, array_pad(array(), count($permKeys), $value));
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} else {
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if (!is_array($actions)) {
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$actions = array('_' . $actions);
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}
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foreach ($actions as $action) {
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if ($action{0} !== '_') {
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$action = '_' . $action;
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}
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if (!in_array($action, $permKeys, true)) {
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throw new AclException(__d('cake_dev', 'Invalid permission key "%s"', $action));
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}
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$save[$action] = $value;
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}
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}
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list($save['aro_id'], $save['aco_id']) = array($perms['aro'], $perms['aco']);
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if ($perms['link'] && !empty($perms['link'])) {
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$save['id'] = $perms['link'][0][$this->alias]['id'];
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} else {
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unset($save['id']);
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$this->id = null;
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}
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return ($this->save($save) !== false);
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}
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/**
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* Get an array of access-control links between the given Aro and Aco
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*
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* @param string $aro ARO The requesting object identifier.
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* @param string $aco ACO The controlled object identifier.
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* @return array Indexed array with: 'aro', 'aco' and 'link'
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*/
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public function getAclLink($aro, $aco) {
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$obj = array();
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$obj['Aro'] = $this->Aro->node($aro);
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$obj['Aco'] = $this->Aco->node($aco);
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if (empty($obj['Aro']) || empty($obj['Aco'])) {
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return false;
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}
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$aro = Hash::extract($obj, 'Aro.0.' . $this->Aro->alias . '.id');
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$aco = Hash::extract($obj, 'Aco.0.' . $this->Aco->alias . '.id');
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$aro = current($aro);
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$aco = current($aco);
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return array(
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'aro' => $aro,
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'aco' => $aco,
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'link' => $this->find('all', array('conditions' => array(
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$this->alias . '.aro_id' => $aro,
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$this->alias . '.aco_id' => $aco
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)))
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);
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}
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/**
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* Get the crud type keys
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*
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* @param array $keys Permission schema
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* @return array permission keys
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*/
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public function getAcoKeys($keys) {
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$newKeys = array();
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$keys = array_keys($keys);
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foreach ($keys as $key) {
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if (!in_array($key, array('id', 'aro_id', 'aco_id'))) {
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$newKeys[] = $key;
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}
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}
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return $newKeys;
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}
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}
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