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aclnode.php

<?php
/* SVN FILE: $Id: aclnode.php 5117 2007-05-18 16:46:55Z phpnut $ */
/**
 * Short description for file.
 *
 * Long description for file
 *
 * PHP versions 4 and 5
 *
 * CakePHP(tm) :  Rapid Development Framework <http://www.cakephp.org/>
 * Copyright 2005-2007, Cake Software Foundation, Inc.
 *                                              1785 E. Sahara Avenue, Suite 490-204
 *                                              Las Vegas, Nevada 89104
 *
 * Licensed under The MIT License
 * Redistributions of files must retain the above copyright notice.
 *
 * @filesource
 * @copyright           Copyright 2005-2007, Cake Software Foundation, Inc.
 * @link                      http://www.cakefoundation.org/projects/info/cakephp CakePHP(tm) Project
 * @package             cake
 * @subpackage          cake.cake.libs.controller.components.dbacl.models
 * @since               CakePHP(tm) v 0.10.0.1232
 * @version             $Revision: 5117 $
 * @modifiedby          $LastChangedBy: phpnut $
 * @lastmodified  $Date: 2007-05-18 11:46:55 -0500 (Fri, 18 May 2007) $
 * @license             http://www.opensource.org/licenses/mit-license.php The MIT License
 */
/**
 * Load AppModel class
 */
loadModel();
/**
 * Short description for file.
 *
 * Long description for file
 *
 * @package       cake
 * @subpackage    cake.cake.libs.controller.components.dbacl.models
 *
 */
class AclNode extends AppModel {
/**
 * Database configuration to use
 *
 * @var string
 */
      var $useDbConfig = ACL_DATABASE;
/**
 * Cache Queries
 *
 * @var boolean
 */
      var $cacheQueries = false;
/**
 * Creates a new ARO/ACO node
 *
 * @param int $linkId
 * @param mixed $parentId
 * @param string $alias
 * @return boolean True on success, false on fail
 * @access public
 */
      function create($linkId = 0, $parentId = null, $alias = '') {
            parent::create();
            if (strtolower(get_class($this)) == "aclnode") {
                  trigger_error("[acl_base] The AclBase class constructor has been called, or the class was instantiated. This class must remain abstract. Please refer to the Cake docs for ACL configuration.", E_USER_ERROR);
                  return null;
            }
            extract ($this->__dataVars());

            if ($parentId == null || $parentId === 0) {
                  $parent = $this->find(null, 'MAX(rght) as rght', null, -1);
                  $parent['lft'] = $parent[0]['rght'];

                  if ($parent[0]['rght'] == null || !$parent[0]['rght']) {
                        $parent['lft'] = 0;
                  }
            } else {
                  $parent = $this->find($this->_resolveID($parentId), null, null, 0);
                  if ($parent == null || count($parent) == 0) {
                        trigger_error("Null parent in {$class}::create()", E_USER_WARNING);
                        return null;
                  }
                  $parent = $parent[$class];
                  $this->_syncTable(1, $parent['lft'], $parent['lft']);
            }
            $return = $this->save(array($class => array($secondary_id => $linkId,
                                                                                                      'alias' => $alias,
                                                                                                      'lft' => $parent['lft'] + 1,
                                                                                                      'rght' => $parent['lft'] + 2)));
            $this->id  = $this->getLastInsertID();
            return $return;
      }
/**
 * Get the ARO/ACO ID with the given alias
 *
 * @param mixed $alias  The alias of an ARO/ACO node
 * @return mixed  The ID of an ARO/ACO node, or false if not found.
 * @access public
 */
      function id($alias) {
            extract($this->__dataVars());
            return $this->find(array($this->name . '.alias' => $alias), array($secondary_id), null, -1);
      }
/**
 * Deletes the ARO/ACO node with the given ID
 *
 * @param mixed $id     The id or alias of an ARO/ACO node
 * @return boolean True on success, false on fail
 * @access public
 */
      function delete($id) {
            extract ($this->__dataVars());
            $db =& ConnectionManager::getDataSource($this->useDbConfig);

            $result = $this->find($this->_resolveID($id));
            $object = $result[$class];
            if ($object == null || count($object) == 0) {
                  return false;
            }

            $children = $this->findAll(array("{$class}.rght" => "< {$result[$class]['rght']}", "{$class}.lft" => "> {$result[$class]['lft']}"), 'id', null, null, null, -1);
            $idList = Set::extract($children, '{n}.' . $class . '.id');
            $idList[] = $result[$class]['id'];

            $this->ArosAco->query('DELETE FROM ' . $db->fullTableName($this->ArosAco) . " WHERE {$class}_id in (" . implode(', ', $idList) . ')');

            $table = $db->fullTableName($this);
            $this->query("DELETE FROM {$table} WHERE {$table}.lft >= {$result[$class]['lft']} AND {$table}.rght <= {$result[$class]['rght']}");

            $shift = 1 + $result[$class]['rght'] - $result[$class]['lft'];
            $this->query('UPDATE ' . $table . ' SET ' . $db->name('rght') . ' = ' . $db->name('rght') . ' - ' . $shift . ' WHERE ' . $db->name('rght') . ' > ' . $result[$class]['rght']);
            $this->query('UPDATE ' . $table . ' SET ' . $db->name('lft') . ' = ' . $db->name('lft') . ' - ' . $shift . ' WHERE ' . $db->name('lft') . ' > ' . $result[$class]['lft']);
            return true;
      }
/**
 * Sets the parent of the given node
 *
 * @param mixed $parentId
 * @param mixed $id
 * @return boolean True on success, false on failure
 * @access public
 */
      function setParent($parentId = null, $id = null) {
            if (strtolower(get_class($this)) == "aclnode") {
                  trigger_error("[acl_base] The AclBase class constructor has been called, or the class was instantiated. This class must remain abstract. Please refer to the Cake docs for ACL configuration.", E_USER_ERROR);
                  return null;
            }
            extract ($this->__dataVars());

            if ($id == null && $this->id == false) {
                  return false;
            } elseif ($id == null) {
                  $id = $this->id;
            }
            $object = $this->find($this->_resolveID($id), null, null, 0);

            if ($object == null || count($object) == 0) {
                  return false;
            }
            $object = $object[$class];
            $parent = $this->getParent($id);

            if (($parent == null && $parentId == null) || ($parentId == $parent[$class][$secondary_id] && $parentId != null) || ($parentId == $parent[$class]['alias'] && $parentId != null)) {
                  return false;
            }

            if ($parentId == null) {
                  $newParent = $this->find(null, 'MAX(rght) as lft', null, -1);
                  $newParent = $newParent[0];
                  $newParent['rght'] = $newParent['lft'];
            } else {
                  $newParent = $this->find($this->_resolveID($parentId), null, null, 0);
                  $newParent = $newParent[$class];
            }

            if ($parentId != null && $newParent['lft'] <= $object['lft'] && $newParent['rght'] >= $object['rght']) {
                  return false;
            }
            $this->_syncTable(0, $object['lft'], $object['lft']);

            if ($object['lft'] < $newParent['lft']) {
                  $newParent['lft'] = $newParent['lft'] - 2;
                  $newParent['rght'] = $newParent['rght'] - 2;
            }

            if ($parentId != null) {
                  $this->_syncTable(1, $newParent['lft'], $newParent['lft']);
            }
            $object['lft'] = $newParent['lft'] + 1;
            $object['rght'] = $newParent['lft'] + 2;
            $this->save(array($class => $object));

            if ($newParent['lft'] == 0) {
                  $this->_syncTable(2, $newParent['lft'], $newParent['lft']);
            }
            return true;
      }
/**
 * Get the parent node of the given Aro or Aco
 *
 * @param moxed $id
 * @return array
 * @access public
 */
      function getParent($id) {
            $path = $this->getPath($id);
            if ($path == null || count($path) < 2) {
                  return null;
            } else {
                  return $path[count($path) - 2];
            }
      }
/**
 * Gets the path to the given Aro or Aco
 *
 * @param mixed $id
 * @return array
 * @access public
 */
      function getPath($id) {
            if (strtolower(get_class($this)) == "aclnode") {
                  trigger_error("[acl_base] The AclBase class constructor has been called, or the class was instantiated. This class must remain abstract. Please refer to the Cake docs for ACL configuration.", E_USER_ERROR);
                  return null;
            }
            extract ($this->__dataVars());
            $item = $this->find($this->_resolveID($id), null, null, 0);

            if ($item == null || count($item) == 0) {
                  return null;
            }
            return $this->findAll(array($class . '.lft' => '<= ' . $item[$class]['lft'], $class . '.rght' => '>= ' . $item[$class]['rght']), null, array($class . '.lft' => 'ASC'), null, null, 0);
      }
/**
 * Get the child nodes of the given Aro or Aco
 *
 * @param mixed $id
 * @return array
 * @access public
 */
      function getChildren($id) {
            if (strtolower(get_class($this)) == "aclnode") {
                  trigger_error("[acl_base] The AclBase class constructor has been called, or the class was instantiated. This class must remain abstract. Please refer to the Cake docs for ACL configuration.", E_USER_ERROR);
                  return null;
            }

            extract ($this->__dataVars());
            $item = $this->find($this->_resolveID($id), null, null, 0);
            return $this->findAll(array($class . '.lft' => '> ' . $item[$class]['lft'], $class . '.rght' => '< ' . $item[$class]['rght']), null, null, null, null, null, 0);
      }
/**
 * Gets a conditions array to find an Aro or Aco, based on the given id or alias
 *
 * @param mixed $id
 * @return array Conditions array for a find/findAll call
 * @access public
 */
      function _resolveID($id) {
            extract($this->__dataVars());
            $key = (is_numeric($id) ? $secondary_id : 'alias');
            return array($this->name . '.' . $key => $id);
      }
/**
 * Shifts the left and right values of the aro/aco tables
 * when a node is added or removed
 *
 * @param unknown_type $dir
 * @param unknown_type $lft
 * @param unknown_type $rght
 * @access protected
 */
      function _syncTable($dir, $lft, $rght) {
            $db =& ConnectionManager::getDataSource($this->useDbConfig);

            if ($dir == 2) {
                  $shift = 1;
                  $dir = '+';
            } else {
                  $shift = 2;

                  if ($dir > 0) {
                        $dir = '+';
                  } else {
                        $dir = '-';
                  }
            }
            $db->query('UPDATE ' . $db->fullTableName($this) . ' SET ' . $db->name('rght') . ' = ' . $db->name('rght') . ' ' . $dir . ' ' . $shift . ' WHERE ' . $db->name('rght') . ' > ' . $rght);
            $db->query('UPDATE ' . $db->fullTableName($this) . ' SET ' . $db->name('lft') . ' = ' . $db->name('lft') . '  ' . $dir . ' ' . $shift . ' WHERE ' . $db->name('lft') . '  > ' . $lft);
      }
/**
 * Infers data based on the currently-intantiated subclass.
 *
 * @return array
 * @access private
 */
      function __dataVars() {
            $vars = array();
            $class = strtolower(get_class($this));
            if ($class == 'aro') {
                  $vars['secondary_id'] = 'foreign_key';
            } else {
                  $vars['secondary_id'] = 'object_id';
            }
            $vars['class'] = ucwords($class);
            return $vars;
      }
}
?>

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