lepton_frontend.php

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<?php
 
declare(strict_types=1);
 
class LEPTON_frontend extends LEPTON_core
{
    use LEPTON_singleton;
 
    public LEPTON_database $database;
    public static $instance;
    
    // [1] Defaults
    public string $default_link = "/";
    public int $default_page_id = 1;
     
    // [2] Page details
    public array $page = [];
    public int $page_id = 0;
    
    public array $page_trail = [];
    
    public bool $page_access_denied = false;
    public bool $page_no_active_sections = false;
 
    public function __construct()
    {   
        LEPTON_core::registerBasicFunctions();
        LEPTON_core::loadCodeSnippets();
        $this->database = LEPTON_database::getInstance();
 
        // @ADD_cronjob 20230727, include cronjob file for external call
        if(CRONJOB == 1 || CRONJOB == 3)
        {
            $_POST['ikey'] = LEPTON_cronjob::getInstance()->cj_key;
            LEPTON_handle::include_files("/modules/cronjob.php");
        }
 
        self::$instance = $this;
        if (TFA != 'none')  // first step in process to display page and set vars
        {           
            if (!isset($_SESSION['USER_ID']))
            {
                $pin_set = -1;
            }
            else
            {
                $pin_set = $this->database->get_one("SELECT pin_set FROM ".TABLE_PREFIX."users WHERE user_id = '".$_SESSION['USER_ID']."' ");
                
            }
            
            switch ($pin_set )
            {
                case 0:
                case 1:
                    header('Location: '.LEPTON_URL.'/account/logout.php');
                    break;    
                
                case -1:
                case 2:
                    LEPTON_SecureCMS::clearLepTokens();
                    break;                  
                
                default:
                    LEPTON_SecureCMS::clearLepTokens();
                    header('Location: '.LEPTON_URL.'/account/logout.php');      
            }   
        }       
    }
    
    public function page_select()
    {
        global $page_id;
 
        // Check if we should add page language sql code
        $sql_where_language = (PAGE_LANGUAGES) ? " AND language = '" . LANGUAGE . "'" : "";
        
        // Get default page
        $now            = time();
        $query_default  = "
            SELECT      * 
            FROM        `".TABLE_PREFIX . "pages` AS `p` 
            INNER JOIN  `".TABLE_PREFIX . "sections`
            
            USING(`page_id`)
            
            WHERE   `parent` = '0' 
                
            AND `visibility` = 'public' 
            
            AND (
                    (".$now." >= `publ_start` OR `publ_start` = 0) 
                AND 
                    (".$now." <= `publ_end` OR `publ_end` = 0)
            )
            ".$sql_where_language."
            ORDER BY
                `p`.`position`
            
            ASC LIMIT 1
        ";
        
        $fetch_default = [];
        $this->database->execute_query(
            $query_default,
            true,
            $fetch_default,
            false
        );
        
        if ( !isset( $page_id ) || !is_numeric( $page_id ) )
        {
            // Display default page
            if (!empty($fetch_default))
            {
                $this->default_link    = $fetch_default[ 'link' ];
                $this->default_page_id = intval($fetch_default[ 'page_id' ]);
                
                // Check if we should redirect or include page inline
                if ( HOMEPAGE_REDIRECTION )
                {
                    // Redirect to page
                    header( "Location: " . $this->buildPageLink( $this->default_link ) );
                    exit();
                }
                else
                {
                    // Include page inline
                    $this->page_id = $this->default_page_id;
                }
            }
            else
            {
                exit();
            }
        }
        else
        {
            if(!isset($fetch_default[ 'link' ]))
            {
                die(LEPTON_tools::display('This installation has no content yet', 'pre','ui red message'));
            }
                        
            $this->page_id = $page_id;
            $this->default_link     = $fetch_default[ 'link' ];
            $this->default_page_id  = intval($fetch_default[ 'page_id' ]);
            $this->page             = $fetch_default;
 
        }
 
        return true;
    }
    
    public function get_page_details()
    {
        if ($this->page_id != 0)
        {
            $this->page = [];
            $query_page = "SELECT * FROM ".TABLE_PREFIX."pages WHERE page_id = ".$this->page_id;
            $this->database->execute_query(
                $query_page,
                true,
                $this->page,
                false
            );
            
            // Make sure page was found in database
            if (empty($this->page))
            {
                // Print page not found message
                exit( "Page not found." );
            }
            else
            {
                foreach ($this->page as $key => $value)
                {
                    // set members of array to constants
                    $key = strtoupper($key);
                    if (!defined($key))
                    {           
                        if ($key === 'TEMPLATE' && empty($value))
                        {                       
                            $value = $this->database->get_one("SELECT value FROM ".TABLE_PREFIX."settings WHERE name = 'default_template' ");
                        }
                        
                        if ($key === 'DESCRIPTION' && empty($value))
                        {                       
                            $value = WEBSITE_DESCRIPTION;
                        }
                        
                        if ($key === 'KEYWORDS' && empty($value))
                        {                       
                            $value = WEBSITE_KEYWORDS;
                        }                       
                        
                        define($key, $value);
                    }
                }
            }
            
//@DEPRECATED_TEMP: see method getPageLanguage()            $this->getPageLanguage();
            
            // Check if the page language is also the selected language. If not, send headers again.
            if ( $this->page[ 'language' ] != LANGUAGE )
            {
                if ( isset( $_SERVER[ 'QUERY_STRING' ] ) && $_SERVER[ 'QUERY_STRING' ] != '' ) // check if there is a query-string
                {
                    header( 'Location: ' . $this->buildPageLink( $this->page[ 'link' ] ) . '?' . $_SERVER[ 'QUERY_STRING' ] . '&lang=' . $this->page[ 'language' ] );
                }
                else
                {
                    header( 'Location: ' . $this->buildPageLink( $this->page[ 'link' ] ) . '?lang=' . $this->page[ 'language' ] );
                }
                exit();
            }
 
            // Page trail
            foreach ( explode( ',', $this->page[ 'page_trail' ] ) AS $pid )
            {
                $this->page_trail[ $pid ] = $pid;
            }                   
        }
                
        
        // Set the template dir
        if(!defined('TEMPLATE'))
        {
            define('TEMPLATE', DEFAULT_TEMPLATE);
        }
        define( 'TEMPLATE_DIR', LEPTON_URL . '/templates/' . TEMPLATE );
        // Check if user is allowed to view this page
        if ($this->page_is_visible($this->page) === false)
        {
            if ( VISIBILITY == 'deleted' || VISIBILITY == 'none' )
            {
                // User isn't allowed on this page so tell them
                $this->page_access_denied = true;
            }
            elseif ( VISIBILITY == 'private' || VISIBILITY == 'registered' )
            {
                // Check if the user is authenticated
                if ( $this->is_authenticated() === false )
                {
                    // User needs to log-in first
                    header( "Location: " . LEPTON_URL . "/account/login.php?redirect=" . $this->buildPageLink($this->page['link']) );
                    exit( 0 );
                }
                else
                {
                    $temp_array = explode(',',$this->page['viewing_groups']);
                    if(in_array( $_SESSION['GROUP_ID'],$temp_array)) {
                        
                        $this->page_access_denied = false;
                    }
                    else
                    {
                        // User is not allowed on this page so tell them
                        $this->page_access_denied = true;
                    }       
                }
                                                    
            }
        }
 
        $this->maintainConstants();
 
        // check if there is at least one active section
        if ($this->page_is_active($this->page) === false)
        {
            $this->page_no_active_sections = true;
        }
    }
    
    public function get_website_settings()
    {               
        // Work-out if any possible in-line search boxes should be shown
        if ( SEARCH == 'public' )
        {
            define( 'SHOW_SEARCH', true );
        }
        elseif ( SEARCH == 'private' && VISIBILITY == 'private' )
        {
            define( 'SHOW_SEARCH', true );
        }
        elseif ( SEARCH == 'private' && $this->is_authenticated() === true )
        {
            define( 'SHOW_SEARCH', true );
        }
        elseif ( SEARCH == 'registered' && $this->is_authenticated() === true )
        {
            define( 'SHOW_SEARCH', true );
        }
        else
        {
            define( 'SHOW_SEARCH', false );
        }
        // Work-out if menu should be shown
        if ( !defined( 'SHOW_MENU' ) )
        {
            define( 'SHOW_MENU', true );
        }
        // Work-out if login menu constants should be set
        if ( FRONTEND_LOGIN )
        {
            // Set login menu constants
            define( 'LOGIN_URL', LEPTON_URL . '/account/login.php' );
            define( 'LOGOUT_URL', LEPTON_URL . '/account/logout.php' );
            define( 'FORGOT_URL', LEPTON_URL . '/account/forgot.php' );
            define( 'PREFERENCES_URL', LEPTON_URL . '/account/preferences.php' );
            define( 'SIGNUP_URL', LEPTON_URL . '/account/signup.php' );
        }
    }
    
    public function preprocess(string &$content): void
    {
        $content = str_ireplace( ["%5B","%5D"], ["[", "]"], $content);
 
        // starting with L*5 LEPTONlink replaces wblink
        if (preg_match_all('/\[LEPTONlink([0-9]+)\]/isU', $content, $ids))
        {
            $new_ids = array_unique( $ids[ 1 ] );
            foreach ($new_ids as $key => $temp_page_id)
            {
                $link = $this->database->get_one( "SELECT `link` FROM `" . TABLE_PREFIX . "pages` WHERE `page_id` = " . $temp_page_id );
                if (!is_null($link))
                {
                    $content = str_replace($ids[0][$key], $this->buildPageLink($link), $content);
                }
            }
            unset($temp_page_id);
        }
    }
 
    public function maintainConstants(): void
    {
        $lookFor = [
            "DESCRIPTION" => WEBSITE_DESCRIPTION,
            "KEYWORDS" => WEBSITE_KEYWORDS
        ];
 
        foreach ($lookFor as $key => $value)
        {
            if (!defined($key))
            {
                define($key, $value);
            }
        }
    }
    
    
    public function getPageLanguage(): void
    {   
        if(!defined ('LANGUAGE'))
        {
            if (isset($_GET['lang']) && ($_GET['lang'] != '') && (!is_numeric($_GET['lang'])) && (strlen($_GET['lang']) == 2))
            {
                if (0 != PAGE_ID)
                {
                    $sTempLang = $this->database->get_one("SELECT language FROM ".TABLE_PREFIX."pages WHERE page_id = ".PAGE_ID);
                    if (null != $sTempLang)
                    {
                        define( 'LANGUAGE', $sTempLang );
                    } 
                    else 
                    {
                        // more or less a theoretical case
                        define('LANGUAGE', DEFAULT_LANGUAGE);
                    }
                } 
                else 
                {
                    if (isset($_SESSION['USER_ID']))
                    {
                        $sTempLang = $this->database->get_one("SELECT language FROM ".TABLE_PREFIX."users WHERE user_id = ".$_SESSION['USER_ID']);
                        if (null != $sTempLang)
                        {
                            define('LANGUAGE', $sTempLang);
                        } 
                        else 
                        {
                            define('LANGUAGE', strtoupper($_GET['lang']));
                        }
                    } 
                    else 
                    {
                        define('LANGUAGE', strtoupper($_GET['lang']));
                    }
                }
 
                $_SESSION['LANGUAGE'] = LANGUAGE;
            }
        }
    }
}