<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2009 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
namespace Org\Util;
use Think\Db;
/**
 +------------------------------------------------------------------------------
 * 基于角色的数据库方式验证类
 +------------------------------------------------------------------------------
 */
// 配置文件增加设置
// USER_AUTH_ON 是否需要认证
// USER_AUTH_TYPE 认证类型
// USER_AUTH_KEY 认证识别号
// REQUIRE_AUTH_MODULE 需要认证模块
// NOT_AUTH_MODULE 无需认证模块
// USER_AUTH_GATEWAY 认证网关
// RBAC_DB_DSN 数据库连接DSN
// RBAC_ROLE_TABLE 角色表名称
// RBAC_USER_TABLE 用户表名称
// RBAC_ACCESS_TABLE 权限表名称
// RBAC_NODE_TABLE 节点表名称
/*
-- --------------------------------------------------------
CREATE TABLE IF NOT EXISTS `think_access` (
 `role_id` smallint(6) unsigned NOT NULL,
 `node_id` smallint(6) unsigned NOT NULL,
 `level` tinyint(1) NOT NULL,
 `module` varchar(50) DEFAULT NULL,
 KEY `groupId` (`role_id`),
 KEY `nodeId` (`node_id`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8;

CREATE TABLE IF NOT EXISTS `think_node` (
 `id` smallint(6) unsigned NOT NULL AUTO_INCREMENT,
 `name` varchar(20) NOT NULL,
 `title` varchar(50) DEFAULT NULL,
 `status` tinyint(1) DEFAULT '0',
 `remark` varchar(255) DEFAULT NULL,
 `sort` smallint(6) unsigned DEFAULT NULL,
 `pid` smallint(6) unsigned NOT NULL,
 `level` tinyint(1) unsigned NOT NULL,
 PRIMARY KEY (`id`),
 KEY `level` (`level`),
 KEY `pid` (`pid`),
 KEY `status` (`status`),
 KEY `name` (`name`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8;

CREATE TABLE IF NOT EXISTS `think_role` (
 `id` smallint(6) unsigned NOT NULL AUTO_INCREMENT,
 `name` varchar(20) NOT NULL,
 `pid` smallint(6) DEFAULT NULL,
 `status` tinyint(1) unsigned DEFAULT NULL,
 `remark` varchar(255) DEFAULT NULL,
 PRIMARY KEY (`id`),
 KEY `pid` (`pid`),
 KEY `status` (`status`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 ;

CREATE TABLE IF NOT EXISTS `think_role_user` (
 `role_id` mediumint(9) unsigned DEFAULT NULL,
 `user_id` char(32) DEFAULT NULL,
 KEY `group_id` (`role_id`),
 KEY `user_id` (`user_id`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8;
*/
class Rbac {
 // 认证方法
 static public function authenticate($map,$model='') {
 if(empty($model)) $model = C('USER_AUTH_MODEL');
 //使用给定的Map进行认证
 return M($model)->where($map)->find();
 }

 //用于检测用户权限的方法,并保存到Session中
 static function saveAccessList($authId=null) {
 if(null===$authId) $authId = $_SESSION[C('USER_AUTH_KEY')];
 // 如果使用普通权限模式,保存当前用户的访问权限列表
 // 对管理员开发所有权限
 if(C('USER_AUTH_TYPE') !=2 && !$_SESSION[C('ADMIN_AUTH_KEY')] )
 $_SESSION['_ACCESS_LIST']	=	self::getAccessList($authId);
 return ;
 }

	// 取得模块的所属记录访问权限列表 返回有权限的记录ID数组
	static function getRecordAccessList($authId=null,$module='') {
 if(null===$authId) $authId = $_SESSION[C('USER_AUTH_KEY')];
 if(empty($module)) $module	=	CONTROLLER_NAME;
 //获取权限访问列表
 $accessList = self::getModuleAccessList($authId,$module);
 return $accessList;
	}

 //检查当前操作是否需要认证
 static function checkAccess() {
 //如果项目要求认证,并且当前模块需要认证,则进行权限认证
 if( C('USER_AUTH_ON') ){
			$_module	=	array();
			$_action	=	array();
 if("" != C('REQUIRE_AUTH_MODULE')) {
 //需要认证的模块
 $_module['yes'] = explode(',',strtoupper(C('REQUIRE_AUTH_MODULE')));
 }else {
 //无需认证的模块
 $_module['no'] = explode(',',strtoupper(C('NOT_AUTH_MODULE')));
 }
 //检查当前模块是否需要认证
 if((!empty($_module['no']) && !in_array(strtoupper(CONTROLLER_NAME),$_module['no'])) || (!empty($_module['yes']) && in_array(strtoupper(CONTROLLER_NAME),$_module['yes']))) {
				if("" != C('REQUIRE_AUTH_ACTION')) {
					//需要认证的操作
					$_action['yes'] = explode(',',strtoupper(C('REQUIRE_AUTH_ACTION')));
				}else {
					//无需认证的操作
					$_action['no'] = explode(',',strtoupper(C('NOT_AUTH_ACTION')));
				}
				//检查当前操作是否需要认证
				if((!empty($_action['no']) && !in_array(strtoupper(ACTION_NAME),$_action['no'])) || (!empty($_action['yes']) && in_array(strtoupper(ACTION_NAME),$_action['yes']))) {
					return true;
				}else {
					return false;
				}
 }else {
 return false;
 }
 }
 return false;
 }

	// 登录检查
	static public function checkLogin() {
 //检查当前操作是否需要认证
 if(self::checkAccess()) {
 //检查认证识别号
 if(!$_SESSION[C('USER_AUTH_KEY')]) {
 if(C('GUEST_AUTH_ON')) {
 // 开启游客授权访问
 if(!isset($_SESSION['_ACCESS_LIST']))
 // 保存游客权限
 self::saveAccessList(C('GUEST_AUTH_ID'));
 }else{
 // 禁止游客访问跳转到认证网关
 redirect(PHP_FILE.C('USER_AUTH_GATEWAY'));
 }
 }
 }
 return true;
	}

 //权限认证的过滤器方法
 static public function AccessDecision($appName=MODULE_NAME) {
 //检查是否需要认证
 if(self::checkAccess()) {
 //存在认证识别号,则进行进一步的访问决策
 $accessGuid = md5($appName.CONTROLLER_NAME.ACTION_NAME);
 if(empty($_SESSION[C('ADMIN_AUTH_KEY')])) {
 if(C('USER_AUTH_TYPE')==2) {
 //加强验证和即时验证模式 更加安全 后台权限修改可以即时生效
 //通过数据库进行访问检查
 $accessList = self::getAccessList($_SESSION[C('USER_AUTH_KEY')]);
 }else {
 // 如果是管理员或者当前操作已经认证过,无需再次认证
 if( $_SESSION[$accessGuid]) {
 return true;
 }
 //登录验证模式,比较登录后保存的权限访问列表
 $accessList = $_SESSION['_ACCESS_LIST'];
 }
 //判断是否为组件化模式,如果是,验证其全模块名
 if(!isset($accessList[strtoupper($appName)][strtoupper(CONTROLLER_NAME)][strtoupper(ACTION_NAME)])) {
 $_SESSION[$accessGuid] = false;
 return false;
 }
 else {
 $_SESSION[$accessGuid]	=	true;
 }
 }else{
 //管理员无需认证
				return true;
			}
 }
 return true;
 }

 /**
 +----------------------------------------------------------
 * 取得当前认证号的所有权限列表
 +----------------------------------------------------------
 * @param integer $authId 用户ID
 +----------------------------------------------------------
 * @access public
 +----------------------------------------------------------
 */
 static public function getAccessList($authId) {
 // Db方式权限数据
 $db = Db::getInstance(C('RBAC_DB_DSN'));
 $table = array('role'=>C('RBAC_ROLE_TABLE'),'user'=>C('RBAC_USER_TABLE'),'access'=>C('RBAC_ACCESS_TABLE'),'node'=>C('RBAC_NODE_TABLE'));
 $sql = "select node.id,node.name from ".
 $table['role']." as role,".
 $table['user']." as user,".
 $table['access']." as access ,".
 $table['node']." as node ".
 "where user.user_id='{$authId}' and user.role_id=role.id and ( access.role_id=role.id or (access.role_id=role.pid and role.pid!=0 ) ) and role.status=1 and access.node_id=node.id and node.level=1 and node.status=1";
 $apps = $db->query($sql);
 $access = array();
 foreach($apps as $key=>$app) {
 $appId	=	$app['id'];
 $appName	 =	 $app['name'];
 // 读取项目的模块权限
 $access[strtoupper($appName)] = array();
 $sql = "select node.id,node.name from ".
 $table['role']." as role,".
 $table['user']." as user,".
 $table['access']." as access ,".
 $table['node']." as node ".
 "where user.user_id='{$authId}' and user.role_id=role.id and ( access.role_id=role.id or (access.role_id=role.pid and role.pid!=0 ) ) and role.status=1 and access.node_id=node.id and node.level=2 and node.pid={$appId} and node.status=1";
 $modules = $db->query($sql);
 // 判断是否存在公共模块的权限
 $publicAction = array();
 foreach($modules as $key=>$module) {
 $moduleId	 =	 $module['id'];
 $moduleName = $module['name'];
 if('PUBLIC'== strtoupper($moduleName)) {
 $sql = "select node.id,node.name from ".
 $table['role']." as role,".
 $table['user']." as user,".
 $table['access']." as access ,".
 $table['node']." as node ".
 "where user.user_id='{$authId}' and user.role_id=role.id and ( access.role_id=role.id or (access.role_id=role.pid and role.pid!=0 ) ) and role.status=1 and access.node_id=node.id and node.level=3 and node.pid={$moduleId} and node.status=1";
 $rs = $db->query($sql);
 foreach ($rs as $a){
 $publicAction[$a['name']]	 =	 $a['id'];
 }
 unset($modules[$key]);
 break;
 }
 }
 // 依次读取模块的操作权限
 foreach($modules as $key=>$module) {
 $moduleId	 =	 $module['id'];
 $moduleName = $module['name'];
 $sql = "select node.id,node.name from ".
 $table['role']." as role,".
 $table['user']." as user,".
 $table['access']." as access ,".
 $table['node']." as node ".
 "where user.user_id='{$authId}' and user.role_id=role.id and ( access.role_id=role.id or (access.role_id=role.pid and role.pid!=0 ) ) and role.status=1 and access.node_id=node.id and node.level=3 and node.pid={$moduleId} and node.status=1";
 $rs = $db->query($sql);
 $action = array();
 foreach ($rs as $a){
 $action[$a['name']]	 =	 $a['id'];
 }
 // 和公共模块的操作权限合并
 $action += $publicAction;
 $access[strtoupper($appName)][strtoupper($moduleName)] = array_change_key_case($action,CASE_UPPER);
 }
 }
 return $access;
 }

	// 读取模块所属的记录访问权限
	static public function getModuleAccessList($authId,$module) {
 // Db方式
 $db = Db::getInstance(C('RBAC_DB_DSN'));
 $table = array('role'=>C('RBAC_ROLE_TABLE'),'user'=>C('RBAC_USER_TABLE'),'access'=>C('RBAC_ACCESS_TABLE'));
 $sql = "select access.node_id from ".
 $table['role']." as role,".
 $table['user']." as user,".
 $table['access']." as access ".
 "where user.user_id='{$authId}' and user.role_id=role.id and ( access.role_id=role.id or (access.role_id=role.pid and role.pid!=0 ) ) and role.status=1 and access.module='{$module}' and access.status=1";
 $rs = $db->query($sql);
 $access	=	array();
 foreach ($rs as $node){
 $access[]	=	$node['node_id'];
 }
		return $access;
	}
}