<?php
/*
* LimeSurvey
* Copyright (C) 2007-2013 The LimeSurvey Project Team / Carsten Schmitz
* All rights reserved.
* License: GNU/GPL License v2 or later, see LICENSE.php
* LimeSurvey is free software. This version may have been modified pursuant
* to the GNU General Public License, and as distributed it includes or
* is derivative of works licensed under the GNU General Public License or
* other free or open source software licenses.
* See COPYRIGHT.php for copyright notices and details.
*
*/

/**
 * For 2.06 most of the functionality in this class will be moved to the LSWebUser class.
 * To not delay release of 2.05 this class was kept the way it is now.
 * 
 * @@TODO Move to LSWebUser and change documentation / workflow for authentication plugins
 */
class LSUserIdentity extends CUserIdentity {

    const ERROR_IP_LOCKED_OUT = 98;
    const ERROR_UNKNOWN_HANDLER = 99;
    
    protected $config = array();
    
    /**
     * The userid
     *  
     * @var int
     */
    public $id = null; 

    /**
     * A User::model() object
     * 
     * @var User
     */
    public $user;
    
    /**
     * This is the name of the plugin to handle authentication
     * default handler is used for remote control
     * 
     * @var string
     */
    public $plugin = 'Authdb';

    public function authenticate() {
        // First initialize the result, we can later retieve it to get the exact error code/message
        $result = new LSAuthResult(self::ERROR_NONE);
        
        // Check if the ip is locked out
        if (FailedLoginAttempt::model()->isLockedOut()) {
            $message = sprintf(gT('You have exceeded the number of maximum login attempts. Please wait %d minutes before trying again.'), App()->getConfig('timeOutTime') / 60);
            $result->setError(self::ERROR_IP_LOCKED_OUT, $message);
        }
        
        // If still ok, continue
        if ($result->isValid())
        { 
            if (is_null($this->plugin)) {
                $result->setError(self::ERROR_UNKNOWN_HANDLER);
            } else {
                // Delegate actual authentication to plugin
                $authEvent = new PluginEvent('newUserSession', $this);
                $authEvent->set('identity', $this);
                App()->getPluginManager()->dispatchEvent($authEvent);
                $pluginResult = $authEvent->get('result');
                if ($pluginResult instanceof LSAuthResult) {
                    $result = $pluginResult;
                } else {
                    $result->setError(self::ERROR_UNKNOWN_IDENTITY);
                }
            }
        }
         
        if ($result->isValid()) {
            // Perform postlogin
            $this->postLogin();
        } else {
            // Log a failed attempt
            $userHostAddress = getIPAddress();
            FailedLoginAttempt::model()->addAttempt($userHostAddress);
            App()->session->regenerateID(); // Handled on login by Yii
        }
        
        $this->errorCode = $result->getCode();
        $this->errorMessage = $result->getMessage();
        
        return $result->isValid();        
    }
    
    public function getConfig()
    {
        return $this->config;
    }
    
    /**
    * Returns the current user's ID
    *
    * @access public
    * @return int
    */
    public function getId()
    {
        return $this->id;
    }
    
    /**
    * Returns the active user's record
    *
    * @access public
    * @return User
    */
    public function getUser()
    {
        return $this->user;
    }
       
    protected function postLogin()
    {
        $user = $this->getUser();
        App()->user->login($this);
        
        // Check for default password
        if ($this->password === 'password') {
            App()->user->setFlash('pwdnotify', gT('Warning: You are still using the default password (\'password\'). Please change your password and re-login again.'));
        }

        // Do session setup      
        Yii::app()->session['loginID'] = (int) $user->uid;
        Yii::app()->session['user'] = $user->users_name;
        Yii::app()->session['full_name'] = $user->full_name;
        Yii::app()->session['htmleditormode'] = $user->htmleditormode;
        Yii::app()->session['templateeditormode'] = $user->templateeditormode;
        Yii::app()->session['questionselectormode'] = $user->questionselectormode;
        Yii::app()->session['dateformat'] = $user->dateformat;
        Yii::app()->session['session_hash'] = hash('sha256',getGlobalSetting('SessionName').$user->users_name.$user->uid);
        
        // Perform language settings
        if (App()->request->getPost('loginlang','default') != 'default')
        {
            $user->lang = sanitize_languagecode(App()->request->getPost('loginlang'));
            $user->save();
            $sLanguage=$user->lang;
        }
        else if ($user->lang=='auto' || $user->lang=='')
        {
            $sLanguage=getBrowserLanguage();
        }
        else
        {
            $sLanguage=$user->lang;
        }

        Yii::app()->session['adminlang'] = $sLanguage;
        $lang = new limesurvey_lang($sLanguage);
        App()->lang = $lang;
        App()->getController()->lang= $lang;
    }
    
    public function setPlugin($name) {
        $this->plugin = $name;
    }
    
    public function setConfig($config) {
        $this->config = $config;
    }    
}