1: <?php
  2: /**
  3:  *
  4:  * PHP 5
  5:  *
  6:  * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
  7:  * Copyright 2005-2011, Cake Software Foundation, Inc. (http://cakefoundation.org)
  8:  *
  9:  * Licensed under The MIT License
 10:  * Redistributions of files must retain the above copyright notice.
 11:  *
 12:  * @copyright     Copyright 2005-2011, Cake Software Foundation, Inc. (http://cakefoundation.org)
 13:  * @link          http://cakephp.org CakePHP(tm) Project
 14:  * @package       Cake.Model
 15:  * @since         CakePHP(tm) v 0.2.9
 16:  * @license       MIT License (http://www.opensource.org/licenses/mit-license.php)
 17:  */
 18: 
 19: App::uses('AppModel', 'Model');
 20: 
 21: /**
 22:  * ACL Node
 23:  *
 24:  * @package       Cake.Model
 25:  */
 26: class AclNode extends AppModel {
 27: 
 28: /**
 29:  * Explicitly disable in-memory query caching for ACL models
 30:  *
 31:  * @var boolean
 32:  */
 33:     public $cacheQueries = false;
 34: 
 35: /**
 36:  * ACL models use the Tree behavior
 37:  *
 38:  * @var array
 39:  */
 40:     public $actsAs = array('Tree' => array('type' => 'nested'));
 41: 
 42: /**
 43:  * Constructor
 44:  *
 45:  */
 46:     public function __construct() {
 47:         $config = Configure::read('Acl.database');
 48:         if (isset($config)) {
 49:             $this->useDbConfig = $config;
 50:         }
 51:         parent::__construct();
 52:     }
 53: 
 54: /**
 55:  * Retrieves the Aro/Aco node for this model
 56:  *
 57:  * @param mixed $ref Array with 'model' and 'foreign_key', model object, or string value
 58:  * @return array Node found in database
 59:  */
 60:     public function node($ref = null) {
 61:         $db = $this->getDataSource();
 62:         $type = $this->alias;
 63:         $result = null;
 64: 
 65:         if (!empty($this->useTable)) {
 66:             $table = $this->useTable;
 67:         } else {
 68:             $table = Inflector::pluralize(Inflector::underscore($type));
 69:         }
 70: 
 71:         if (empty($ref)) {
 72:             return null;
 73:         } elseif (is_string($ref)) {
 74:             $path = explode('/', $ref);
 75:             $start = $path[0];
 76:             unset($path[0]);
 77: 
 78:             $queryData = array(
 79:                 'conditions' => array(
 80:                     $db->name("{$type}.lft") . ' <= ' . $db->name("{$type}0.lft"),
 81:                     $db->name("{$type}.rght") . ' >= ' . $db->name("{$type}0.rght")),
 82:                 'fields' => array('id', 'parent_id', 'model', 'foreign_key', 'alias'),
 83:                 'joins' => array(array(
 84:                     'table' => $table,
 85:                     'alias' => "{$type}0",
 86:                     'type' => 'LEFT',
 87:                     'conditions' => array("{$type}0.alias" => $start)
 88:                 )),
 89:                 'order' => $db->name("{$type}.lft") . ' DESC'
 90:             );
 91: 
 92:             foreach ($path as $i => $alias) {
 93:                 $j = $i - 1;
 94: 
 95:                 $queryData['joins'][] = array(
 96:                     'table' => $table,
 97:                     'alias' => "{$type}{$i}",
 98:                     'type' => 'LEFT',
 99:                     'conditions' => array(
100:                         $db->name("{$type}{$i}.lft") . ' > ' . $db->name("{$type}{$j}.lft"),
101:                         $db->name("{$type}{$i}.rght") . ' < ' . $db->name("{$type}{$j}.rght"),
102:                         $db->name("{$type}{$i}.alias") . ' = ' . $db->value($alias, 'string'),
103:                         $db->name("{$type}{$j}.id") . ' = ' . $db->name("{$type}{$i}.parent_id")
104:                     )
105:                 );
106: 
107:                 $queryData['conditions'] = array('or' => array(
108:                     $db->name("{$type}.lft") . ' <= ' . $db->name("{$type}0.lft") . ' AND ' . $db->name("{$type}.rght") . ' >= ' . $db->name("{$type}0.rght"),
109:                     $db->name("{$type}.lft") . ' <= ' . $db->name("{$type}{$i}.lft") . ' AND ' . $db->name("{$type}.rght") . ' >= ' . $db->name("{$type}{$i}.rght"))
110:                 );
111:             }
112:             $result = $db->read($this, $queryData, -1);
113:             $path = array_values($path);
114: 
115:             if (
116:                 !isset($result[0][$type]) ||
117:                 (!empty($path) && $result[0][$type]['alias'] != $path[count($path) - 1]) ||
118:                 (empty($path) && $result[0][$type]['alias'] != $start)
119:             ) {
120:                 return false;
121:             }
122:         } elseif (is_object($ref) && is_a($ref, 'Model')) {
123:             $ref = array('model' => $ref->name, 'foreign_key' => $ref->id);
124:         } elseif (is_array($ref) && !(isset($ref['model']) && isset($ref['foreign_key']))) {
125:             $name = key($ref);
126:             list($plugin, $alias) = pluginSplit($name);
127: 
128:             $model = ClassRegistry::init(array('class' => $name, 'alias' => $alias));
129: 
130:             if (empty($model)) {
131:                 trigger_error(__d('cake_dev', "Model class '%s' not found in AclNode::node() when trying to bind %s object", $type, $this->alias), E_USER_WARNING);
132:                 return null;
133:             }
134: 
135:             $tmpRef = null;
136:             if (method_exists($model, 'bindNode')) {
137:                 $tmpRef = $model->bindNode($ref);
138:             }
139:             if (empty($tmpRef)) {
140:                 $ref = array('model' => $alias, 'foreign_key' => $ref[$name][$model->primaryKey]);
141:             } else {
142:                 if (is_string($tmpRef)) {
143:                     return $this->node($tmpRef);
144:                 }
145:                 $ref = $tmpRef;
146:             }
147:         }
148:         if (is_array($ref)) {
149:             if (is_array(current($ref)) && is_string(key($ref))) {
150:                 $name = key($ref);
151:                 $ref = current($ref);
152:             }
153:             foreach ($ref as $key => $val) {
154:                 if (strpos($key, $type) !== 0 && strpos($key, '.') === false) {
155:                     unset($ref[$key]);
156:                     $ref["{$type}0.{$key}"] = $val;
157:                 }
158:             }
159:             $queryData = array(
160:                 'conditions' => $ref,
161:                 'fields' => array('id', 'parent_id', 'model', 'foreign_key', 'alias'),
162:                 'joins' => array(array(
163:                     'table' => $table,
164:                     'alias' => "{$type}0",
165:                     'type' => 'LEFT',
166:                     'conditions' => array(
167:                         $db->name("{$type}.lft") . ' <= ' . $db->name("{$type}0.lft"),
168:                         $db->name("{$type}.rght") . ' >= ' . $db->name("{$type}0.rght")
169:                     )
170:                 )),
171:                 'order' => $db->name("{$type}.lft") . ' DESC'
172:             );
173:             $result = $db->read($this, $queryData, -1);
174: 
175:             if (!$result) {
176:                 trigger_error(__d('cake_dev', "AclNode::node() - Couldn't find %s node identified by \"%s\"", $type, print_r($ref, true)), E_USER_WARNING);
177:             }
178:         }
179:         return $result;
180:     }
181: }
182: