<?php
    class CustomControllerAclManager extends Zend_Controller_Plugin_Abstract
    {
        // default user role if not logged or (or invalid role found)
        private $_defaultRole = 'guest';
        // the action to dispatch if a user doesn't have sufficient privileges
        private $_authController = array('module'=>'','controller' => 'account',
                                          'action'    => 'login');
		
        public function __construct(Zend_Auth $auth)
        {
        	$this->db=Zend_Registry::get('db');
            $this->auth = $auth;
            $this->acl = new Zend_Acl();
            // add the different user roles
            $this->acl->addRole(new Zend_Acl_Role($this->_defaultRole));
            $this->acl->addRole(new Zend_Acl_Role('member'));
            $this->acl->addRole(new Zend_Acl_Role('administrator'), 'member');
            // add the resources we want to have control over
            $this->acl->add(new Zend_Acl_Resource('account'));
            $this->acl->add(new Zend_Acl_Resource('data'));
            $this->acl->add(new Zend_Acl_Resource('water'));
            $this->acl->add(new Zend_Acl_Resource('admin'));
			$this->acl->add(new Zend_Acl_Resource('upload'));
			$this->acl->add(new Zend_Acl_Resource('author'));
			$this->acl->add(new Zend_Acl_Resource('heihe'));
            // allow access to everything for all users by default
            // except for the account management and administration areas
            $this->acl->allow();
            $this->acl->deny(null, 'account');
            $this->acl->deny(null, 'admin');
			$this->acl->deny(null, 'author');
            // add an exception so guests can log in or register
            // in order to gain privilege
			  $this->acl->allow('guest', 'account', array('login',
			  							'logout',
			                          'fetchpwd',
			                          'register',
			                          'registercomplete'));
			  $this->acl->deny('guest','data',array('download','order'));
			  $this->acl->deny('guest','water',array('download','order'));  
			  $this->acl->deny('guest','heihe',array('submit'));                     
			  // allow members access to the account management area
			  $this->acl->allow('guest','author',array('index'));  
			  $this->acl->allow('member', 'account');
			  $this->acl->allow('member', 'author');
			  // allows administrators access to the admin area
			  $this->acl->allow('administrator', 'admin');
			}
		/**
		  * preDispatch
		  *
		  * Before an action is dispatched, check if the current user
		  * has sufficient privileges. If not, dispatch the default
		  * action instead
		  *
		  * @param Zend_Controller_Request_Abstract     $request
		  */
		public function preDispatch(Zend_Controller_Request_Abstract $request)
		{
			
			$phpSessId = $request->getParam('PHPSESSID');
			
			if (!empty($phpSessId) && session_id() != $phpSessId) {
				session_destroy();
				session_id($phpSessId);
				session_start();
			}
		     // check if a user is logged in and has a valid role,
		     // otherwise, assign them the default role (guest)
		    $mb = new member();
			$mb->db=$this->db;
			
			if($mb->checkcookie())
			{
				$auth = Zend_Auth::getInstance();
				$authAdapter = new Zend_Auth_Adapter_DbTable($this->db);
		    	$authAdapter->setTableName('users')
		                            ->setIdentityColumn('username')
		                            ->setCredentialColumn('password');
		        $authAdapter->setIdentity($mb->user)->setCredential($mb->srpwd);
		        $result = $auth->authenticate($authAdapter);
		        if ($result->isValid()) {  	
			         $data = $authAdapter->getResultRowObject(null,'password');
			         $auth->getStorage()->write($data);
			         $this->db->query("update users set ts_last_login=now() where username=?",array($mb->user));
		        }
			}
			
		     if ($this->auth->hasIdentity())
		          $role = $this->auth->getIdentity()->usertype;
		     else
		          $role = $this->_defaultRole;
		     if (!$this->acl->hasRole($role))
		          $role = $this->_defaultRole;
		     // the ACL resource is the requested controller name
		     $resource = $request->controller;
		     if ($request->module<>"default") $resource=$request->module;
		     // the ACL privilege is the requested action name
		     $privilege = $request->action;
			 if ($request->module<>"default") $privilege = $request->controller;
		     // if we haven't explicitly added the resource, check
		     // the default global permissions
		     if (!$this->acl->has($resource))
		          $resource = null;
		     // access denied - reroute the request to the default action handler
		     if (!$this->acl->isAllowed($role, $resource, $privilege)) {
		     	$request->setModuleName($this->_authController['module']);
		      $request->setControllerName($this->_authController['controller']);
		      $request->setActionName($this->_authController['action']);
		    }
		  }
		}