SWDB/application/page/Login_Page.php

<?php
/**
 * Landing (login) page file.
 *
 * Provides a class with all the properties and methods to display the page.
 *
 * @author Iñigo Valentin <i@inigovalentin.com>
 * @license https://www.gnu.org/licenses/gpl-3.0.en.html GNU General Public License V3
 * @package SWDB
 */

require_once(PATH::PAGE . "Page.php");

/**
 * Login page model.
 *
 * @category Page
 */
class Login_Page extends Page{

    /**
     * @var bool Indicates if the user has been redirected to this page after an error.
     */
    private $is_error = false;
    
    /**
     * @var string Error message to show when login was unsuccesfull and
     * the user is back in the login page
     */
    private $error_message = "";

    /**
     * Constructor.
     *
     * Retrieves the data and initializes the variables.
     */
    public function __construct(){
        parent::__construct();
        $this->set_public(true);
        $this->set_view("login.php");
        $this->set_title("Login");
        $this->set_description("Login to SWDB");
        $this->set_canonical("login/");
        $this->add_css("login.css");
        
        if (http_response_code() == 401){
            $this->is_error = true;
            $this->error_message = "Invalid credentials";
        }
        
        $this->set_code(200);
        $this->set_message("OK");
    }
    
    /**
     * Checks if a error has redirected the user to shis page.
     *
     * @return bool True if there was an error, false otherwise
     */
    public function is_error(){
        return $this->is_error;
    }
    
    /**
     * Retrieves the error message to show.
     *
     * @return string Error message.
     */
    public function get_error_message(){
        return $this->error_message;
    }
    
}