<?php

 /**
 * This file is part of LEPTON Core, released under the GNU GPL
 * Please see LICENSE and COPYING files in your package for details, specially for terms and warranties.
 * 
 * NOTICE:LEPTON CMS Package has several different licenses.
 * Please see the individual license in the header of each single file or info.php of modules and templates.
 *
 * @author          LEPTON Project
 * @copyright       2010-2020 LEPTON Project
 * @link            https://lepton-cms.org
 * @license         http://www.gnu.org/licenses/gpl.html
 * @license_terms   please see LICENSE and COPYING files in your package
 *
 */ 

// include class.secure.php to protect this file and the whole CMS!
if (defined('LEPTON_PATH')) {	
	include(LEPTON_PATH.'/framework/class.secure.php'); 
} else {
	$oneback = "../";
	$root = $oneback;
	$level = 1;
	while (($level < 10) && (!file_exists($root.'/framework/class.secure.php'))) {
		$root .= $oneback;
		$level += 1;
	}
	if (file_exists($root.'/framework/class.secure.php')) { 
		include($root.'/framework/class.secure.php'); 
	} else {
		trigger_error(sprintf("[ <b>%s</b> ] Can't include class.secure.php!", $_SERVER['SCRIPT_NAME']), E_USER_ERROR);
	}
}
// end include class.secure.php

// prevent this file from being accessed directly in the browser (would set all entries in DB settings table to '')
if (!isset ($_POST['default_language']) || $_POST['default_language'] == '')
{
    die( header('Location: index.php'));
}


/**
 *	Getting the admin-instance and print the "admin header"
 *
 */
$admin = new LEPTON_admin('Settings', 'settings');

/**
 *	Create a back link
 *
 */
$js_back = ADMIN_URL.'/settings/index.php';

global $backend_switched;
$backend_switched = false;

function save_settings(&$admin, &$database)
{
    global $MESSAGE, $HEADING, $TEXT;
	global $messages;
	
    $err_msg	= array();
    $messages 	= array();
    
    $settings = array();
    $old_settings = array();
	
	/**
	 *	Query current settings in the db, then loop through them to get old values
	 *
	 */
	$current_values = array();
	$database->execute_query(
		"SELECT `name`, `value` FROM `".TABLE_PREFIX."settings` WHERE `name` <> 'lepton_version' ORDER BY `name`",
		true,
		$current_values,
		true
	);
	
	if( count( $current_values ) == 0 )
    {
        $err_msg[] = $MESSAGE['SETTINGS_UNABLE_OPEN_CONFIG']." [100]";
    }
    else
    {
		foreach( $current_values as &$ref)
		{
			$old_settings[ $ref['name'] ] = $ref['value'];
			$settings[ $ref['name'] ] = $admin->get_post( $ref['name'] );
		}
	}

    $allow_tags_in_fields = array('website_header', 'website_footer');

	$allow_empty_values = array('website_description','backend_title','website_keywords','website_header','website_footer','sec_anchor','pages_directory');

    // language must be 2 upercase letters only
    $default_language = strtoupper( $settings['default_language'] );
    $settings['default_language'] = (preg_match('/^[A-Z]{2}$/', $default_language) )
    	? $default_language
    	: $old_settings['default_language']
    	;
	
	// needed for the time/date/timezones here
    $user_time = false;
    
	// timezone must match a value in the table
	if( !in_array( $settings['default_timezone_string'] , LEPTON_basics::get_timezones() ))
	{
		$settings['default_timezone_string'] = DEFAULT_TIMEZONE_STRING;
	}

	// date_format must be a key from /interface/date_formats
    if( !array_key_exists($settings['default_date_format'], LEPTON_basics::get_dateformats() ))
    {
    	 $settings['default_date_format'] = $old_settings['default_date_format'];
    }

    // time_format must be a key from /interface/time_formats
	if( !array_key_exists($settings['default_time_format'], LEPTON_basics::get_timeformats() ))
	{
		$settings['default_time_format'] = $old_settings['default_time_format'];
	}

    // charsets must be a key from /interface/charsets
	$settings['default_charset'] = $old_settings['default_charset'];
	
    //  error reporting values validation
    $settings['er_level'] = (isset ($settings['er_level']) && (array_key_exists($settings['er_level'], LEPTON_basics::get_errorlevels() )))
    	? intval($settings['er_level']) 
    	: $old_settings['er_level']
    	;
    
    //  frontend login
    $settings['frontend_login'] = (isset ($settings['frontend_login'])) 
    	? $settings['frontend_login'] 
    	: $old_settings['frontend_login']
    	;
    
	//	Gibt es eine gruppe bzw. ist die gruppen-id zulässig?
    if (isset ($settings['frontend_signup']))
    {
		$gid = (int)$settings['frontend_signup'];
		if ($gid == 0)
		{
			$settings['frontend_signup'] = 0;  // no frontend_signup allowed
		} else {
			$result = array();
			$database->execute_query(
				"SELECT * FROM `".TABLE_PREFIX."groups` WHERE `group_id` = ".$gid." ",
				true,
				$result,
				false
			);
			
			if (count($result) > 0)
			{
				$settings['frontend_signup'] = $gid;
			} else {
				$settings['frontend_signup'] = $old_settings['frontend_signup'];
			}
		}
    }
    
    // bools checks
    $settings['home_folders'] = isset ($settings['home_folders']) ? ($settings['home_folders']) : $old_settings['home_folders'];
    $settings['homepage_redirection'] = isset ($settings['homepage_redirection']) ? ($settings['homepage_redirection']) : $old_settings['homepage_redirection'];
    $settings['manage_sections'] = isset ($settings['manage_sections']) ? ($settings['manage_sections']) : $old_settings['manage_sections'];
    $settings['multiple_menus'] = isset ($settings['multiple_menus']) ? ($settings['multiple_menus']) : $old_settings['multiple_menus'];
    $settings['page_languages'] = isset ($settings['page_languages']) ? ($settings['page_languages']) : $old_settings['page_languages'];
    $settings['section_blocks'] = isset ($settings['section_blocks']) ? ($settings['section_blocks']) : $old_settings['section_blocks'];
    $settings['page_trash'] = isset ($settings['page_trash']) ? ($settings['page_trash']) : $old_settings['page_trash'];
	$settings['tfa'] = isset ($settings['tfa']) ? ($settings['tfa']) : $old_settings['tfa'];
    //  we have to check two situations a) is the POST set b) is vakue within the area
    $page_level_limit = isset ($settings['page_level_limit']) ? intval($settings['page_level_limit']) : $old_settings['page_level_limit'];
    $settings['page_level_limit'] = ($page_level_limit <= 10) ? $page_level_limit : $old_settings['page_level_limit'];
    //  do the same
    $redirect_timer = isset ($settings['redirect_timer']) ? intval($settings['redirect_timer']) : $old_settings['redirect_timer'];
    $settings['redirect_timer'] = (($redirect_timer >= -1) && ($redirect_timer <= 10000)) ? $redirect_timer : $old_settings['redirect_timer'];
	// validate Leptoken lifetime
    $leptoken_lifetime = isset ($settings['leptoken_lifetime']) ? $settings['leptoken_lifetime'] : $old_settings['leptoken_lifetime'];
    $settings['leptoken_lifetime'] = ($leptoken_lifetime > -1) ? $leptoken_lifetime : $old_settings['leptoken_lifetime'];
	// validate maximum logon attempts
    $max_attempts = isset ($settings['max_attempts']) ? intval($settings['max_attempts']) : $old_settings['max_attempts'];
    $settings['max_attempts'] = ($max_attempts > 0) ? $max_attempts : $old_settings['max_attempts'];

	/**
	 *	check theme
	 */
    $settings['default_theme'] = isset ($settings['default_theme']) ? ($settings['default_theme']) : $old_settings['default_theme'];
	
/**
	 *	Has the default theme changed? Not needed in 5.0.0
*/
	if ($settings['default_theme'] != $old_settings['default_theme']) {
		include_once LEPTON_PATH.'/framework/functions/function.switch_theme.php';
		switch_theme( $settings['default_theme'] );
		
		global $backend_switched;
		$backend_switched = true;
		
	}

    $settings['default_template'] = isset ($settings['default_template']) ? ($settings['default_template']) : $old_settings['default_template'];
    $settings['app_name'] = isset ($settings['app_name']) ? $settings['app_name'] : $old_settings['app_name'];

    $settings['sec_anchor'] = isset ($settings['sec_anchor']) ? $settings['sec_anchor'] : $old_settings['sec_anchor'];
	
/**
 *	Pages_directory could be empty, see line 120 $allow_empty_values
 */
	$settings['pages_directory'] = isset ($settings['pages_directory']) ? '/'.$settings['pages_directory'] : $old_settings['pages_directory'];
	$bad = array('"','`','!','@','#','$','%','^','&','*','=','+','|',';',':',',','?'	);
	$settings['pages_directory'] = str_replace($bad, '', $settings['pages_directory']);
	$settings['pages_directory'] = str_replace('\\', '/', $settings['pages_directory']);
	$pattern = '#[/][a-z,0-9_-]+#';
	preg_match($pattern, $settings['pages_directory'], $array);
	$settings['pages_directory'] = (isset($array['0']) ? $array['0'] : "");
/**
 *	[3]	Has the name of the directory changed?
 */
 	if ($old_settings['pages_directory'] != $settings['pages_directory'])
 	{
 		if( $settings['pages_directory'] == "" )
 		{
 			//	[3.1] directory will NOT be deleted automatically!	
 			$messages[] = $MESSAGE['PAGES_DIRECTORY_EMPTY'];
 		
 		} elseif( ( $old_settings['pages_directory'] == "" ) && ($settings['pages_directory'] != "")) {
 			
 			//	[3.2] Old directory name WAS empty (root!) and the new one isn't created automtically!
 			$messages[] = $MESSAGE['PAGES_DIRECTORY_NEW'];
 			
 		} else {
 			//	[3.3] Simple rename the current directory
 			rename( LEPTON_PATH.$old_settings['pages_directory'], LEPTON_PATH.$settings['pages_directory'] );
 		}
 	}
 	
/**	*****************************************************
 *	Media_directory could NOT be empty, see line 120 $allow_empty_values
 */
	$settings['media_directory'] = isset ($settings['media_directory']) ? '/'.$settings['media_directory'] : $old_settings['media_directory'];
	$bad = array('"','`','!','@','#','$','%','^','&','*','=','+','|',';',':',',','?'	);
	$settings['media_directory'] = str_replace($bad, '', $settings['media_directory']);
	$settings['media_directory'] = str_replace('\\', '/', $settings['media_directory']);
	$pattern = '#[/][a-z,0-9_-]+#';
	preg_match($pattern, $settings['media_directory'], $array);
	$settings['media_directory'] = (isset($array['0']) ? $array['0'] : "");
/**
 *	Has the name of the directory changed?
 */
 	if ($old_settings['media_directory'] != $settings['media_directory']) {
 		rename( LEPTON_PATH.$old_settings['media_directory'], LEPTON_PATH.$settings['media_directory'] );
 	}
//	End: Media-Directory
 	
    if(!empty($settings['sec_anchor']))
	{
		// must begin with a letter
		$pattern = '/^[a-z][a-z_0-9]*$/i';
		if(!preg_match($pattern, $settings['sec_anchor'], $array))
		{
			$err_msg[] = $TEXT['SEC_ANCHOR'].' '.$TEXT['INVALID_SIGNS'];
		}
	}

    // Work-out file mode
    // Check if should be set to 777 or left alone
        if (isset ($_POST['world_writeable']) && $_POST['world_writeable'] == 'true')
        {
            $settings['string_file_mode'] = '0666';
            $settings['string_dir_mode'] = '0777';
        }
    	else
    	{
        	$settings['string_dir_mode'] = '0755';
        	$settings['string_file_mode'] = '0644';
    	}

    // check home folder settings
    // remove home folders for all users if the option is changed to "false"
    if ( $settings['home_folders'] == 'false' && $old_settings['home_folders'] == 'true' ) {
        $sql = 'UPDATE `'.TABLE_PREFIX.'users` ';
        $sql .= 'SET `home_folder` = \'\';';
        if (false === $database->simple_query( "UPDATE `".TABLE_PREFIX."users` SET `home_folder` = '';" ))
        {
            $err_msg[] = $database->get_error();
        }
        
    }
    
    // check webmailer settings
    // email should be validatet by core
    // Work-out which mailer routine should be checked
    if ( !isset($settings['server_email']) )
    {
        $err_msg[] = $TEXT['MAILER_DEFAULT_SENDER_MAIL']." [1]";
    } else {
        if( false === LEPTON_handle::checkEmailChars( $settings['server_email'] ) )
        {
            $err_msg[] = $TEXT['MAILER_DEFAULT_SENDER_MAIL']." [2]";
        }
    }
    
    $mailer_default_sendername = (isset ($settings['mailer_default_sendername'])) ? $settings['mailer_default_sendername'] : $old_settings['mailer_default_sendername'];
    if (($mailer_default_sendername <> ''))
    {
        $settings['mailer_default_sendername'] = $mailer_default_sendername;
    }
    else
    {
        $err_msg[] = $MESSAGE['MOD_FORM_REQUIRED_FIELDS'].': '.$TEXT['MAILER_DEFAULT_SENDER_NAME'];
    }
    $mailer_routine = isset ($settings['mailer_routine']) ? $settings['mailer_routine'] : $old_settings['mailer_routine'];
    if (($mailer_routine == 'smtp'))
    {
    // Work-out return the 1th mail domain from a poassible textblock
        $pattern = '#https?://([A-Z0-9][^:][A-Z.0-9_-]+[a-z]{2,6})#ix';
        $mailer_smtp_host = (isset ($settings['mailer_smtp_host'])) ? $settings['mailer_smtp_host'] : $old_settings['mailer_smtp_host'];
        if (preg_match($pattern, $mailer_smtp_host, $array))
        {
            $mailer_smtp_host = $array [0];
        }
        if ((isset ($mailer_smtp_host)))
        {
            if ((isset ($mailer_smtp_host)) && ($mailer_smtp_host != ''))
            {
                $settings['mailer_smtp_host'] = $mailer_smtp_host;
            }
            else
            {
                $err_msg[] = $MESSAGE['MOD_FORM_REQUIRED_FIELDS'].': '.$TEXT['MAILER_SMTP_HOST'];
            }
        }
        // Work-out if SMTP authentification should be checked
        $mailer_smtp_auth = isset ($settings['mailer_smtp_auth']) && ($settings['mailer_smtp_auth'] == 'true') ? 'true' : 'false';
        $settings['mailer_smtp_auth'] = $mailer_smtp_auth;
        if (($mailer_smtp_auth == 'true') && ($settings['mailer_routine'] == 'smtp'))
        {
        // later change min and max lenght with variables
            $pattern = '/^[a-zA-Z0-9_]{4,30}$/';
            $mailer_smtp_username = (isset ($settings['mailer_smtp_username'])) ? $settings['mailer_smtp_username'] : $old_settings['mailer_smtp_username'];
            if (($mailer_smtp_username == '') && !preg_match($pattern, $mailer_smtp_username))
            {
                $err_msg[] = $TEXT['MAILER_SMTP'].': '.$MESSAGE['LOGIN_AUTHENTICATION_FAILED'];
            }
            else
            {
                $settings['mailer_smtp_username'] = $mailer_smtp_username;
            }
            // receive password vars and calculate needed action
            $pattern = '/[^'.$admin->password_chars.']/';
            $current_password = $admin->get_post('mailer_smtp_password');
            $current_password = ($current_password == null ? '' : $current_password);
            if (($current_password == ''))
            {
                $err_msg[] = $TEXT['MAILER_SMTP'].': '.$MESSAGE['LOGIN_AUTHENTICATION_FAILED'];
            }
            elseif (preg_match($pattern, $current_password))
            {
                $err_msg[] = $MESSAGE['PREFERENCES_INVALID_CHARS'];
            }
        }
    }

    // if no validation errors, try to update the database, otherwise return errormessages
    if (sizeof($err_msg) == 0)
    {
		// Query current settings in the db, then loop through them and update the db with the new value
        
        $update_fields = array();
        $current_settings_names = array();
        
        $database->execute_query(
        	"SELECT `name` FROM `".TABLE_PREFIX."settings` WHERE `name` <> 'lepton_version' ORDER BY `name`",
        	true,
        	$current_settings_names,
        	true
        );
        
        foreach($current_settings_names as &$ref)
        {
        	$setting_name	= $ref['name'];
        	$value = $settings[ $setting_name ];
        	
			if (!in_array($setting_name, $allow_tags_in_fields))
            {
            	$value = strip_tags($value);
            }

            $passed = in_array($setting_name, $allow_empty_values);
			
			if ( (trim($value) <> '') || ($passed == true) )
			{
				$update_fields[] = array( "value"=>$value, "name"=>$setting_name );
			}
        }
        // die(LEPTON_tools::display( $update_fields, "pre", "ui message"));
        $database->simple_query(
        	"UPDATE `".TABLE_PREFIX."settings` SET `value`= :value WHERE `name`= :name",
        	$update_fields
        );
        
        if($database->is_error())
        {
        	$err_msg[] = $database->get_error();
        }
        
        // Query current search settings in the db, then loop through them and update the db with the new value
        $search_update_values = array();
        $all_search_settings = array();
        $database->execute_query(
        	"SELECT `name`, `value` FROM `".TABLE_PREFIX."search` WHERE `extra` = '' ",
        	true,
        	$all_search_settings,
        	true
        );
        
        foreach( $all_search_settings as &$row) 
        {
            $old_value = $row['value'];
            $post_name = 'search_'.$row['name'];
            $value = $admin->get_post($post_name);
            // hold old value if post is empty
            if (isset ($value))
            {
            	// check search template
                $value = (($value == '') && ($setting_name == 'template')) ? $settings['default_template'] : $admin->get_post($post_name);
                $value = (($admin->get_post($post_name) == '') && ($setting_name != 'template')) ? $value : $admin->get_post($post_name);
                $value = addslashes($value);
			
				$search_update_values[] = array("name" => $row['name'], "value" => $value);
            }
        }
        $database->simple_query(
        	"UPDATE `".TABLE_PREFIX."search` SET `value`= :value WHERE `name`= :name AND `extra` = '' ",
        	 $search_update_values
        );
        
		if($database->is_error())
        {
        	$err_msg[] = $database->get_error();
        }

    }
    
    return ((sizeof($err_msg) > 0) ? implode('<br />', $err_msg) : '');
}

$retval = save_settings($admin, $database);

if ($retval == '')
{
 	if(count($messages) > 0)
	{
		$messages = "<p><strong>".implode("<br />",$messages)."</strong><p><p>&nbsp;</p>";
	} else {
		$messages = "";
	}
	
	if(true === $backend_switched)
	{
	    $_SESSION = array();
	    
        // delete session cookie if set
        if (isset($_COOKIE[session_name()])) {
            setcookie(session_name(), '', 0, '/');
        }

        session_destroy();
        
        $js_back = LEPTON_URL."/admins/login/index.php";
        die( header("Location: ".$js_back, false));
	}
    
    $admin->print_success( $messages.$MESSAGE['SETTINGS_SAVED'], $js_back );
}
else
{
    $admin->print_error($retval, $js_back);
}

$admin->print_footer();

?>