You've already forked joomla_test
571 lines
15 KiB
PHP
571 lines
15 KiB
PHP
<?php
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/**
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* @package Joomla.Platform
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* @subpackage Access
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*
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* @copyright Copyright (C) 2005 - 2013 Open Source Matters, Inc. All rights reserved.
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* @license GNU General Public License version 2 or later; see LICENSE
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*/
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defined('JPATH_PLATFORM') or die;
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jimport('joomla.utilities.arrayhelper');
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/**
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* Class that handles all access authorisation routines.
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*
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* @package Joomla.Platform
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* @subpackage Access
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* @since 11.1
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*/
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class JAccess
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{
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/**
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* Array of view levels
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*
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* @var array
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* @since 11.1
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*/
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protected static $viewLevels = array();
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/**
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* Array of rules for the asset
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*
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* @var array
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* @since 11.1
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*/
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protected static $assetRules = array();
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/**
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* Array of user groups.
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*
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* @var array
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* @since 11.1
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*/
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protected static $userGroups = array();
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/**
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* Array of user group paths.
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*
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* @var array
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* @since 11.1
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*/
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protected static $userGroupPaths = array();
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/**
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* Array of cached groups by user.
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*
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* @var array
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* @since 11.1
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*/
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protected static $groupsByUser = array();
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/**
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* Method for clearing static caches.
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*
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* @return void
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*
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* @since 11.3
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*/
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public static function clearStatics()
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{
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self::$viewLevels = array();
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self::$assetRules = array();
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self::$userGroups = array();
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self::$userGroupPaths = array();
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self::$groupsByUser = array();
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}
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/**
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* Method to check if a user is authorised to perform an action, optionally on an asset.
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*
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* @param integer $userId Id of the user for which to check authorisation.
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* @param string $action The name of the action to authorise.
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* @param mixed $asset Integer asset id or the name of the asset as a string. Defaults to the global asset node.
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*
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* @return boolean True if authorised.
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*
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* @since 11.1
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*/
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public static function check($userId, $action, $asset = null)
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{
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// Sanitise inputs.
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$userId = (int) $userId;
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$action = strtolower(preg_replace('#[\s\-]+#', '.', trim($action)));
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$asset = strtolower(preg_replace('#[\s\-]+#', '.', trim($asset)));
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// Default to the root asset node.
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if (empty($asset))
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{
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$db = JFactory::getDbo();
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$assets = JTable::getInstance('Asset', 'JTable', array('dbo' => $db));
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$rootId = $assets->getRootId();
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$asset = $rootId;
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}
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// Get the rules for the asset recursively to root if not already retrieved.
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if (empty(self::$assetRules[$asset]))
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{
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self::$assetRules[$asset] = self::getAssetRules($asset, true);
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}
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// Get all groups against which the user is mapped.
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$identities = self::getGroupsByUser($userId);
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array_unshift($identities, $userId * -1);
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return self::$assetRules[$asset]->allow($action, $identities);
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}
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/**
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* Method to check if a group is authorised to perform an action, optionally on an asset.
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*
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* @param integer $groupId The path to the group for which to check authorisation.
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* @param string $action The name of the action to authorise.
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* @param mixed $asset Integer asset id or the name of the asset as a string. Defaults to the global asset node.
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*
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* @return boolean True if authorised.
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*
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* @since 11.1
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*/
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public static function checkGroup($groupId, $action, $asset = null)
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{
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// Sanitize inputs.
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$groupId = (int) $groupId;
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$action = strtolower(preg_replace('#[\s\-]+#', '.', trim($action)));
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$asset = strtolower(preg_replace('#[\s\-]+#', '.', trim($asset)));
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// Get group path for group
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$groupPath = self::getGroupPath($groupId);
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// Default to the root asset node.
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if (empty($asset))
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{
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// TODO: $rootId doesn't seem to be used!
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$db = JFactory::getDbo();
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$assets = JTable::getInstance('Asset', 'JTable', array('dbo' => $db));
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$rootId = $assets->getRootId();
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}
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// Get the rules for the asset recursively to root if not already retrieved.
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if (empty(self::$assetRules[$asset]))
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{
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self::$assetRules[$asset] = self::getAssetRules($asset, true);
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}
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return self::$assetRules[$asset]->allow($action, $groupPath);
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}
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/**
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* Gets the parent groups that a leaf group belongs to in its branch back to the root of the tree
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* (including the leaf group id).
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*
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* @param mixed $groupId An integer or array of integers representing the identities to check.
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*
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* @return mixed True if allowed, false for an explicit deny, null for an implicit deny.
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*
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* @since 11.1
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*/
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protected static function getGroupPath($groupId)
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{
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// Preload all groups
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if (empty(self::$userGroups))
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{
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$db = JFactory::getDbo();
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$query = $db->getQuery(true)
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->select('parent.id, parent.lft, parent.rgt')
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->from('#__usergroups AS parent')
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->order('parent.lft');
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$db->setQuery($query);
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self::$userGroups = $db->loadObjectList('id');
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}
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// Make sure groupId is valid
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if (!array_key_exists($groupId, self::$userGroups))
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{
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return array();
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}
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// Get parent groups and leaf group
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if (!isset(self::$userGroupPaths[$groupId]))
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{
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self::$userGroupPaths[$groupId] = array();
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foreach (self::$userGroups as $group)
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{
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if ($group->lft <= self::$userGroups[$groupId]->lft && $group->rgt >= self::$userGroups[$groupId]->rgt)
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{
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self::$userGroupPaths[$groupId][] = $group->id;
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}
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}
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}
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return self::$userGroupPaths[$groupId];
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}
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/**
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* Method to return the JAccessRules object for an asset. The returned object can optionally hold
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* only the rules explicitly set for the asset or the summation of all inherited rules from
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* parent assets and explicit rules.
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*
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* @param mixed $asset Integer asset id or the name of the asset as a string.
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* @param boolean $recursive True to return the rules object with inherited rules.
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*
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* @return JAccessRules JAccessRules object for the asset.
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*
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* @since 11.1
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*/
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public static function getAssetRules($asset, $recursive = false)
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{
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// Get the database connection object.
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$db = JFactory::getDbo();
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// Build the database query to get the rules for the asset.
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$query = $db->getQuery(true)
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->select($recursive ? 'b.rules' : 'a.rules')
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->from('#__assets AS a');
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// SQLsrv change
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$query->group($recursive ? 'b.id, b.rules, b.lft' : 'a.id, a.rules, a.lft');
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// If the asset identifier is numeric assume it is a primary key, else lookup by name.
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if (is_numeric($asset))
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{
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$query->where('(a.id = ' . (int) $asset . ')');
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}
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else
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{
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$query->where('(a.name = ' . $db->quote($asset) . ')');
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}
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// If we want the rules cascading up to the global asset node we need a self-join.
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if ($recursive)
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{
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$query->join('LEFT', '#__assets AS b ON b.lft <= a.lft AND b.rgt >= a.rgt')
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->order('b.lft');
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}
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// Execute the query and load the rules from the result.
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$db->setQuery($query);
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$result = $db->loadColumn();
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// Get the root even if the asset is not found and in recursive mode
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if (empty($result))
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{
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$db = JFactory::getDbo();
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$assets = JTable::getInstance('Asset', 'JTable', array('dbo' => $db));
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$rootId = $assets->getRootId();
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$query->clear()
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->select('rules')
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->from('#__assets')
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->where('id = ' . $db->quote($rootId));
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$db->setQuery($query);
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$result = $db->loadResult();
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$result = array($result);
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}
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// Instantiate and return the JAccessRules object for the asset rules.
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$rules = new JAccessRules;
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$rules->mergeCollection($result);
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return $rules;
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}
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/**
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* Method to return a list of user groups mapped to a user. The returned list can optionally hold
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* only the groups explicitly mapped to the user or all groups both explicitly mapped and inherited
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* by the user.
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*
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* @param integer $userId Id of the user for which to get the list of groups.
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* @param boolean $recursive True to include inherited user groups.
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*
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* @return array List of user group ids to which the user is mapped.
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*
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* @since 11.1
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*/
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public static function getGroupsByUser($userId, $recursive = true)
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{
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// Creates a simple unique string for each parameter combination:
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$storeId = $userId . ':' . (int) $recursive;
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if (!isset(self::$groupsByUser[$storeId]))
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{
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// TODO: Uncouple this from JComponentHelper and allow for a configuration setting or value injection.
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if (class_exists('JComponentHelper'))
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{
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$guestUsergroup = JComponentHelper::getParams('com_users')->get('guest_usergroup', 1);
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}
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else
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{
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$guestUsergroup = 1;
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}
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// Guest user (if only the actually assigned group is requested)
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if (empty($userId) && !$recursive)
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{
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$result = array($guestUsergroup);
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}
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// Registered user and guest if all groups are requested
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else
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{
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$db = JFactory::getDbo();
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// Build the database query to get the rules for the asset.
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$query = $db->getQuery(true)
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->select($recursive ? 'b.id' : 'a.id');
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if (empty($userId))
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{
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$query->from('#__usergroups AS a')
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->where('a.id = ' . (int) $guestUsergroup);
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}
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else
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{
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$query->from('#__user_usergroup_map AS map')
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->where('map.user_id = ' . (int) $userId)
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->join('LEFT', '#__usergroups AS a ON a.id = map.group_id');
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}
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// If we want the rules cascading up to the global asset node we need a self-join.
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if ($recursive)
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{
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$query->join('LEFT', '#__usergroups AS b ON b.lft <= a.lft AND b.rgt >= a.rgt');
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}
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// Execute the query and load the rules from the result.
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$db->setQuery($query);
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$result = $db->loadColumn();
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// Clean up any NULL or duplicate values, just in case
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JArrayHelper::toInteger($result);
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if (empty($result))
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{
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$result = array('1');
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}
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else
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{
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$result = array_unique($result);
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}
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}
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self::$groupsByUser[$storeId] = $result;
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}
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return self::$groupsByUser[$storeId];
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}
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/**
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* Method to return a list of user Ids contained in a Group
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*
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* @param integer $groupId The group Id
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* @param boolean $recursive Recursively include all child groups (optional)
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*
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* @return array
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*
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* @since 11.1
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* @todo This method should move somewhere else
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*/
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public static function getUsersByGroup($groupId, $recursive = false)
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{
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// Get a database object.
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$db = JFactory::getDbo();
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$test = $recursive ? '>=' : '=';
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// First find the users contained in the group
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$query = $db->getQuery(true)
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->select('DISTINCT(user_id)')
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->from('#__usergroups as ug1')
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->join('INNER', '#__usergroups AS ug2 ON ug2.lft' . $test . 'ug1.lft AND ug1.rgt' . $test . 'ug2.rgt')
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->join('INNER', '#__user_usergroup_map AS m ON ug2.id=m.group_id')
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->where('ug1.id=' . $db->quote($groupId));
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$db->setQuery($query);
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$result = $db->loadColumn();
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// Clean up any NULL values, just in case
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JArrayHelper::toInteger($result);
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return $result;
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}
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/**
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* Method to return a list of view levels for which the user is authorised.
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*
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* @param integer $userId Id of the user for which to get the list of authorised view levels.
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*
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* @return array List of view levels for which the user is authorised.
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*
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* @since 11.1
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*/
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public static function getAuthorisedViewLevels($userId)
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{
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// Get all groups that the user is mapped to recursively.
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$groups = self::getGroupsByUser($userId);
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// Only load the view levels once.
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if (empty(self::$viewLevels))
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{
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// Get a database object.
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$db = JFactory::getDbo();
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// Build the base query.
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$query = $db->getQuery(true)
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->select('id, rules')
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->from($db->quoteName('#__viewlevels'));
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// Set the query for execution.
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$db->setQuery($query);
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// Build the view levels array.
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foreach ($db->loadAssocList() as $level)
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{
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self::$viewLevels[$level['id']] = (array) json_decode($level['rules']);
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}
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}
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// Initialise the authorised array.
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$authorised = array(1);
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// Find the authorised levels.
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foreach (self::$viewLevels as $level => $rule)
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{
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foreach ($rule as $id)
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{
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if (($id < 0) && (($id * -1) == $userId))
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{
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$authorised[] = $level;
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break;
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}
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// Check to see if the group is mapped to the level.
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elseif (($id >= 0) && in_array($id, $groups))
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{
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$authorised[] = $level;
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break;
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}
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}
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}
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return $authorised;
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}
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/**
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* Method to return a list of actions for which permissions can be set given a component and section.
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*
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* @param string $component The component from which to retrieve the actions.
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* @param string $section The name of the section within the component from which to retrieve the actions.
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*
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* @return array List of actions available for the given component and section.
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*
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* @since 11.1
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* @deprecated 12.3 (Platform) & 4.0 (CMS) Use JAccess::getActionsFromFile or JAccess::getActionsFromData instead.
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* @codeCoverageIgnore
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*/
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public static function getActions($component, $section = 'component')
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{
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JLog::add(__METHOD__ . ' is deprecated. Use JAccess::getActionsFromFile or JAccess::getActionsFromData instead.', JLog::WARNING, 'deprecated');
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$actions = self::getActionsFromFile(
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JPATH_ADMINISTRATOR . '/components/' . $component . '/access.xml',
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"/access/section[@name='" . $section . "']/"
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);
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if (empty($actions))
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{
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return array();
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}
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else
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{
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return $actions;
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}
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}
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/**
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* Method to return a list of actions from a file for which permissions can be set.
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*
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* @param string $file The path to the XML file.
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* @param string $xpath An optional xpath to search for the fields.
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*
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* @return boolean|array False if case of error or the list of actions available.
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*
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* @since 12.1
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*/
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public static function getActionsFromFile($file, $xpath = "/access/section[@name='component']/")
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{
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if (!is_file($file) || !is_readable($file))
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{
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// If unable to find the file return false.
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return false;
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}
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else
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{
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// Else return the actions from the xml.
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$xml = simplexml_load_file($file);
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return self::getActionsFromData($xml, $xpath);
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}
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}
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/**
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* Method to return a list of actions from a string or from an xml for which permissions can be set.
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*
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* @param string|SimpleXMLElement $data The XML string or an XML element.
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* @param string $xpath An optional xpath to search for the fields.
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*
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* @return boolean|array False if case of error or the list of actions available.
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*
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* @since 12.1
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*/
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public static function getActionsFromData($data, $xpath = "/access/section[@name='component']/")
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{
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// If the data to load isn't already an XML element or string return false.
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if ((!($data instanceof SimpleXMLElement)) && (!is_string($data)))
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{
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return false;
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}
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// Attempt to load the XML if a string.
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if (is_string($data))
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{
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try
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{
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$data = new SimpleXMLElement($data);
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}
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catch (Exception $e)
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{
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return false;
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}
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// Make sure the XML loaded correctly.
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if (!$data)
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{
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return false;
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}
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}
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// Initialise the actions array
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$actions = array();
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// Get the elements from the xpath
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$elements = $data->xpath($xpath . 'action[@name][@title][@description]');
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// If there some elements, analyse them
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if (!empty($elements))
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{
|
|
foreach ($elements as $action)
|
|
{
|
|
// Add the action to the actions array
|
|
$actions[] = (object) array(
|
|
'name' => (string) $action['name'],
|
|
'title' => (string) $action['title'],
|
|
'description' => (string) $action['description']
|
|
);
|
|
}
|
|
}
|
|
|
|
// Finally return the actions array
|
|
return $actions;
|
|
}
|
|
}
|