Untitled

<html>

<?php
if(isset($this->session->userdata['is_logged_in'])){
redirect('autheticate');
}

// include 'header.php';

?>
<body>
<?php
if(isset($logout_message)){
    echo "<div class='success_message'>";
    echo $logout_message;
    echo "</div";
}
?>

<div id='content_container'>
    <div id='login_form'>
        <h2>Login Form</h2>
        <hr />
        <?php echo form_open('authentication/login_process'); ?>
        <?php
        echo "<div class='error_message'>";
        if(isset($error_message)){
            echo $error_message;
        }
        echo validation_errors();
        echo "</div>";
        ?>
        <label>Username:</label>
        <input type='text' name='email' id='email' placeholder='Email'/>
        <br /><br />
        <label>Password:</label>
        <input type='password' name='password' id='password' placeholder='********' />
        <br /><br />
        <input type='submit' value=' Login ' name='submit' /> <br />
        <?php echo form_close(); ?>
    </div>
</div>
</body>
</html>

<?php


class Authentication extends CI_Controller{

public function __construct() {
parent::__construct();
    $this->load->helper('form'); // load the form helper
    $this->load->helper('url_helper'); // load URL helper
    $this->load->library('session'); // load the session library
    $this->load->library('form_validation'); // load the validation libary
    $this->load->model('user_model'); // load the user model
}

public function index(){
    $this->load->view('login.php');
}

public function login_process(){
    $this->form_validation->set_rules('email', 'Username', 'required|trim|valid_email');
    $this->form_validation->set_rules('password', 'Password', 'required|trim|min_length[8]|max_length[32]');

    if($this->form_validation->run() == FALSE){ // if the login form hasn't been filled out yet
        if(isset($this->session->userdata['is_logged_in'])){ // and if the user is logged in
            if($this->session->userlevel == 1){ // if the user is a student, take them to student home
                $this->load->view('student_home.php');
            }
            else{
                $this->load->view('admin/admin_home.php'); // else, the user is an admin, take them to the admin home
            }
        }
        else{
            $this->load->view('login.php'); // if user is not logged in, display login form
        }
    }
    else{ // else, if the form has been filled out, set variables
        $data = array(
            'email' => $this->input->post('email'),
            'password' => $this->input->post('password')
        );
        $result = $this->User_model->login_user($data); // check for authentication

        if($result == TRUE){ // if it works, grab all user info
            $email = $this->input->post('email');
            $result = $this->User_model->get_user_info($email);

            if($result != FALSE){ // if all user info is grabbed, set session data
                $session_data = array(
                    'email' => $result[0]->email,
                    'firstname' => $result[0]->first_name,
                    'userlevel' => $result[0]->user_level_id
                );

                $this->session->set_userdata('is_logged_in', $session_data); // set the session data
                if($this->session->userlevel == 1){
                $this->load->view("student_home.php"); // if they are a student take them to the student home
                }
                else{
                    $this->load->view("admin/admin_home.php"); // if they are an admin take the to the admin home
                }
            }
        }
        else{ // if we can't find the username and password match then show error message
            $data = array(
                'error_message' => 'Invalid Username or Password'
            );
            $this->load->view('login.php', $data);
        }
    }
}

public function logout(){
    $session_data = array(
        'email' => '',
        'firstname' => '',
        'userlevel' => ''
    );
    $this->session->unset_userdata('is_logged_in', $session_data);
    $data['logout_message'] = "You have been logged out.";
    $this->load->view('login.php', $data);
}

}