/lenasys/trunk

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

	class Login extends CI_Controller {

		/*

		 *	Constructor

		 */

		function __construct() {

			parent::__construct();

			//Load required library

			$this->load->model('user', '', TRUE);

			$this->load->model('Stats');

		}

		/*

		 *	This function runs when the user navigates directly to the login controller

		 */

		public function index() {

			//If user is already logged in

			if($this->user->isLoggedIn()) {

				//User already logged in

				redirect(base_url().'home', 'refresh');

			} else {

				//Display the login form

				$this->drawLoginForm('');

			}

		}

		/*

		 *	This function validate the user input from login form using the library "form_validation".

		 *  NOTICE: This does NOT mean that it validates it against the database.

		 */

		public function validate() {

			//Load required library

			$this->load->library('form_validation');

			//Sets validation rules

			$this->form_validation->set_rules('username', 'Username', 'trim|required|xss_clean');

			$this->form_validation->set_rules('password', 'Password', 'trim|required|xss_clean');

			//Run validation

			if($this->form_validation->run() == FALSE) {

				//Field validation failed. Display login form (with error message).

				$this->drawLoginForm(validation_errors());

			} else {

				$username = $this->input->post('username');

				$password = $this->input->post('password');

				//Try to login

				if ($this->user->login($username, $password)) {

					redirect(base_url().'home', 'refresh');

				} else {

					$this->drawLoginForm('Access denied!');

				}

			}	

		}

		/*

		 *	This function draws the login form.

		 */

		private function drawLoginForm($errors) {

			//Load required library

			$this->load->helper(array('form'));

			//Display the view

			$data['error'] = $errors;

			$stats = $this->Stats->statsTeacher();

			$data['browser'] = $stats['browser'];

			$data['version'] = $stats['version'];

			$data['platform'] = $stats['platform'];

			$data['numberOfCourses'] = $stats['numberOfCourses'];

			$headTagData = array(

				'cssFiles' => array('header', 'login_view'),

				'jsFiles' => array('header', 'userControls')

			);

			$this->load->view('headTag', array('headTagData' => $headTagData));	

			$userInfo = array(

				'userType' => $this->user->getUserType(),

				'userName' => $this->user->getUserName()

			);

			$this->load->view('header', $userInfo);

			$this->load->view('login_view', $data);

		}

	}

?>