<?php
// Datenbank-Verbindungsparameter
require_once ('dbutils.php');
require_once ('commonutils.php');
require_once ('queuecontent.php');
// require_once ('content.php');

class Roomtables {
	var $dbutils;
	
	function __construct() {
		$this->dbutils = new DbUtils();
	}

	function handleCommand($command) {
		if(session_id() == '') {
			session_start();
			if (!isset($_SESSION['angemeldet']) || !$_SESSION['angemeldet']) {
				echo json_encode(array("status" => "ERROR", "code" => ERROR_NOT_AUTHOTRIZED, "msg" => ERROR_NOT_AUTHOTRIZED_MSG));
				return;
			}
		}
		
		header("Cache-Control: no-store, no-cache, must-revalidate, max-age=0");
		header("Cache-Control: post-check=0, pre-check=0", false);
		header("Pragma: no-cache");
		
		if($command == 'showAllRooms') {
			$this->showAllRooms();
		} else if ($command == 'getRooms') {
			$this->getRooms(); // only rooms!
		} else if ($command == 'showAllRoomsAndTablesWithUnpaidItems') {
			$this->showAllRoomsAndTablesWithUnpaidItems();
		} else if ($command == 'getUnpaidTables') {
			$this->getUnpaidTables($_GET['roomid']);
		} else if ($command == 'getRoomfield') {
			$this->getRoomfield();
		} else if ($command == 'getRoomfieldAlsoInactive') {
			$this->getRoomfieldAlsoInactive();
		} else if ($command == 'setRoomInfo') {
			if (self::hasCurrentUserAdminRights()) {
				$this->setRoomInfo($_POST['rooms'],$_POST['togoworkprinter']);
			}
		} else if ($command == 'createTableCodes') {
			self::createTableCodes();
		} else if ($command == 'tableqrcodes') {
			self::tableqrcodes();
		}
	}
	
	private static function hasCurrentUserAdminRights() {
		if(session_id() == '') {
			session_start();
		}
		if (!isset($_SESSION['angemeldet']) || !$_SESSION['angemeldet']) {
			return false;
		} else {
			return ($_SESSION['is_admin']);
		}
	}
	
	private static function createTableCodes() {
		if (!self::hasCurrentUserAdminRights()) {
			echo json_encode(array("status" => "ERROR","msg" => "Benutzerrechte nicht ausreichend"));
			return;
		}
		try {
			$pdo = DbUtils::openDbAndReturnPdoStatic();
			$sql = "SELECT id FROM %resttables% WHERE removed is null AND (code is NULL OR code='')";
			$activeTables = CommonUtils::fetchSqlAll($pdo, $sql);
			$updateSql = "UPDATE %resttables% SET code=? WHERE id=?";
			foreach($activeTables as $table) {
				$tableid = $table["id"];
				$uniqid = md5(uniqid());
				CommonUtils::execSql($pdo, $updateSql, array($uniqid,$tableid));
			}
			echo json_encode(array("status" => "OK"));
		} catch (Exception $ex) {
			echo json_encode(array("status" => "ERROR","msg" => "Datenbank nicht erreichbar"));
		}
	}
	
	function showAllRooms() {
		$pdo = DbUtils::openDbAndReturnPdoStatic();
		$roomtables = $this->getAllTablesAndRooms($pdo);
		echo json_encode($roomtables);
	}
	
	public static function getUnpaidTablesCore($pdo,$roomid) {
		$userarea = self::getUserArea($pdo);
		$areaWhere = " ";
		if (!is_null($userarea)) {
			$area = intval($userarea);
			$areaWhere = " AND R.area='$area' ";
		}
		
		$tablesSql = "SELECT id,tableno FROM %resttables% R WHERE R.roomid=? AND removed is null $areaWhere ORDER BY sorting";

		$stmt = $pdo->prepare(DbUtils::substTableAlias($tablesSql));
		$stmt->execute(array($roomid));
		$result = $stmt->fetchAll();
		$tablesArr = array();
		
		foreach($result as $row) {
			$entry = array("id" => $row['id'], "name" => $row['tableno']);
			$tablesArr[] = $entry;
		}
		
		$tableresult = array();
		foreach($tablesArr as $aTable) {
			$tableid = $aTable['id'];
			
			$sql = "SELECT sum(%queue%.price) as sumprice,count(%queue%.price) as prodcount 
			FROM %queue%
			INNER JOIN %products% ON %queue%.productid = %products%.id
			INNER JOIN %pricelevel% ON %queue%.pricelevel = %pricelevel%.id
			WHERE tablenr = ? AND paidtime is null AND toremove = '0'
			AND isclosed is null";
			
			$stmt = $pdo->prepare(DbUtils::substTableAlias($sql));
			$stmt->execute(array($tableid));
			
			$row = $stmt->fetchObject();
			if ($row != null) {
				$prodcount = $row->prodcount;
				$sumprice = $row->sumprice;
				if ($prodcount > 0) {
					$aTableEntry = array("id" => $tableid,"name" => $aTable["name"], "pricesum" => $sumprice);
					$tableresult[] = $aTableEntry;
				}
			}
		}
		return($tableresult);
	}
	
	function getUnpaidTables($roomid) {
		$pdo = DbUtils::openDbAndReturnPdoStatic();
		$priceTakeAway = $this->getUnpaidSumOfTakeAway($pdo);
		echo json_encode(array("status" => "OK", "tables" => self::getUnpaidTablesCore($pdo,$roomid), "takeawayprice" => $priceTakeAway));	
	}
	
	function showAllRoomsAndTablesWithUnpaidItems() {
		$pdo = $this->dbutils->openDbAndReturnPdo($pdo);
		$roomtables = $this->getAllTablesAndRooms($pdo);
		for ($i=0;$i<count($roomtables);$i++) {
			$tablesArr = $roomtables[$i]["tables"];
			$newtablesArr = array();
			for ($j=0;$j<count($tablesArr);$j++) {
				$tableentry = $tablesArr[$j];
				$tableid = $tableentry["id"];
				if ($this->hasTableUnpaidItems($tableid)) {
					$newtablesArr[] = $tableentry;
				}
			}
			$roomtables[$i]["tables"] = $newtablesArr;
		}
		echo json_encode($roomtables);
	}
	
	function hasTableUnpaidItems($tableid) {
		$sql = "SELECT %queue%.id as id,longname,%queue%.price as price,%pricelevel%.name as pricelevelname,%products%.id as prodid
		FROM %queue%
		INNER JOIN %products% ON %queue%.productid = %products%.id
		INNER JOIN %pricelevel% ON %queue%.pricelevel = %pricelevel%.id
		WHERE tablenr = $tableid AND paidtime is null AND toremove = '0'
		ORDER BY ordertime;";
		
		$pdo = $this->dbutils->openDbAndReturnPdo();
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute();
		$count = $stmt->rowCount();
		if ($count > 0) {
			return true;
		} else {
			return false;
		}
	}
	
	/*
	 * get only the rooms (for paydesk, because tables are dynamic due to their pay status)
	 */
	function getRooms() {
		$pdo = DbUtils::openDbAndReturnPdoStatic();
		$userarea = self::getUserArea($pdo);
		
		$sql = "SELECT id,roomname FROM %room% WHERE removed is null ORDER BY sorting";
		$result = CommonUtils::fetchSqlAll($pdo, $sql, null);
		
		$roomArr = array();
		
		foreach($result as $row) {
			$tablesToLookAt = $this->hasUserResponsibleTablesInRoom($pdo, $row['id'], $userarea);
			if (!$tablesToLookAt) {
				continue;
			}
			
			$roomEntry = array("id" => $row['id'], "name" => $row['roomname']);
			$roomArr[] = $roomEntry;
		}
		
		$priceTakeAway = $this->getUnpaidSumOfTakeAway($pdo);
		
		echo json_encode(array("roomstables" => $roomArr, "takeawayprice" => $priceTakeAway));
	}
	
	private function getUnpaidSumOfTakeAway($pdo) {
		$sql = "SELECT IFNULL(SUM(IF(%queue%.toremove='0' AND %queue%.paidtime is null,%queue%.price,0.00)),0.00) as pricesum FROM %queue% ";
		$sql .= " WHERE %queue%.tablenr is null AND isclosed is null";
		$stmt = $pdo->prepare(DbUtils::substTableAlias($sql));
		$stmt->execute();
		$row = $stmt->fetchObject();
		return $row->pricesum;
	}
	
	private function hasUserResponsibleTablesInRoom($pdo,$roomid,$userarea) {
		if (is_null($userarea)) {
			return true;
		}
		$sql = "SELECT count(id) as countid FROM %resttables% R WHERE R.roomid=? AND R.area=?";
		$row = CommonUtils::getRowSqlObject($pdo, $sql, array($roomid,$userarea));
		$countid = $row->countid;
		if ($countid > 0) {
			return true;
		} else {
			return false;
		}
	}
	
	private static function getUserArea($pdo) {
		if(session_id() == '') {
			session_start();
		}
		$userid = $_SESSION['userid'];
		$sql = "SELECT area FROM %user% WHERE id=?";
		$row = CommonUtils::getRowSqlObject($pdo, $sql, array($userid));
		return $row->area;
	}
	
	private static function getTimesFromArray($tableid,$reservations) {
		foreach($reservations as $res) {
			if ($res["tableid"] == $tableid) {
				return $res["times"];
			}
		}
		return '';
	}
	
	private static function sqlForEndTime() {
		$sqlEndTimeStamp = 'ADDTIME(CONCAT(starttime,":",starttimemin,":00"),CONCAT(duration,":",durationmins,":00"))';
		$sqlEndHour = 'HOUR(' . $sqlEndTimeStamp . ') as endhour';
		$sqlEndMin = 'MINUTE(' . $sqlEndTimeStamp . ') as endmin';
		$sqlEndTime = "$sqlEndHour,$sqlEndMin";
		return $sqlEndTime;
	}
	
	private function getAllTablesAndRooms($pdo)
	{
		$sqlEndTimeStamp = 'ADDTIME(CONCAT(starttime,":",starttimemin,":00"),CONCAT(duration,":",durationmins,":00"))';
		$sqlEndHour = 'HOUR(' . $sqlEndTimeStamp . ') ';
		$sqlEndMin = 'LPAD(MINUTE(' . $sqlEndTimeStamp . '),2,0)';
		
		$sql = "SELECT tableid,GROUP_CONCAT(DISTINCT CONCAT(starttime,':',LPAD(starttimemin,2,0),'-',($sqlEndHour),':',($sqlEndMin)) ORDER BY starttime) as times from %reservations% R ";
		//$sql = "SELECT tableid,GROUP_CONCAT(DISTINCT CONCAT(starttime,':00-',(starttime+duration),':00') ORDER BY starttime) as times from %reservations% R ";
		$sql .= "WHERE DATE(scheduledate)=CURDATE() AND (HOUR(NOW())-1) <= starttime GROUP BY tableid";
		$reservations = CommonUtils::fetchSqlAll($pdo, $sql);

		$userarea = self::getUserArea($pdo);
		
		$queue = new QueueContent();
		$sql = "SELECT id,roomname FROM %room% WHERE removed is null ORDER BY sorting";
		$stmt = $pdo->prepare(DbUtils::substTableAlias($sql));
		$stmt->execute();
		$dbresult = $stmt->fetchAll(PDO::FETCH_ASSOC);

		$arrayOfRooms = array();
		
		$showprepinwaiter = CommonUtils::getConfigValue($pdo, 'showprepinwaiter', 1);
		$workflowconfig = CommonUtils::getConfigValue($pdo, 'workflowconfig', 0);
		$queryprodForTableView = false;
		if (($showprepinwaiter == 1) && (($workflowconfig == 0) || ($workflowconfig == 1))) {
			$queryprodForTableView = true;
		}
		
		foreach($dbresult as $zeile) {
			$roomid = $zeile['id'];
			
			$tablesToLookAt = $this->hasUserResponsibleTablesInRoom($pdo, $roomid, $userarea);
			if (!$tablesToLookAt) {
				continue;
			}
			
			$tablesArray = array();
			
			$areaWhere = " ";
			if (!is_null($userarea)) {
				$area = intval($userarea);
				$areaWhere = " AND R.area='$area' ";
			}
			
			$sql = "SELECT R.id as id,R.tableno as name,R.sorting as sorting,";
			$sql .= " IFNULL(SUM(IF(Q.toremove='0' AND Q.paidtime is null AND Q.isclosed is null,Q.price,0.00)),0.00) as pricesum FROM %resttables% R";
			$sql .= " LEFT OUTER JOIN %queue% Q ON Q.tablenr=R.id WHERE R.removed is null AND active='1' AND ";
			$sql .= " R.roomid=? $areaWhere GROUP BY R.id,name ";
			$sql .= " ORDER BY R.sorting";
			
			
	
			$stmt = $pdo->prepare(DbUtils::substTableAlias($sql));
			$stmt->execute(array($roomid));
			$tablesArray = $stmt->fetchAll(PDO::FETCH_OBJ);
			
			
 			foreach ($tablesArray as $tableEntry) {
				$resTxt = self::getTimesFromArray($tableEntry->id, $reservations);
				
				$arrayOfProdsAndIdsOfATable = array("prods" => array(), "ids" => '');
				if ($queryprodForTableView) {
					$arrayOfProdsAndIdsOfATable = $queue->getAllPreparedProductsForTableidAsArray($pdo,$tableEntry->id);
				}
 				$arrayOfProdsOfATable = $arrayOfProdsAndIdsOfATable['prods'];
 				$numberOfProductsTotalToServe = $queue->numberOfProductsForTableNotDelivered($pdo,$tableEntry->id);
 				$numberOfReadyProducts = count($arrayOfProdsOfATable);
 				$queueids = $this->getIdsFromProdList($arrayOfProdsOfATable);
 				
 				$tableEntry->prodcount = $numberOfProductsTotalToServe;
 				$tableEntry->prodready = $numberOfReadyProducts;
 				$tableEntry->readyQueueIds = $queueids;
				$tableEntry->reservations = $resTxt;
 			}
			
			$aRoomEntry = array ("id" => $roomid, "name" => $zeile['roomname'], "tables" => $tablesArray);
			
			$arrayOfRooms[] = $aRoomEntry;
		}
		
		$priceTakeAway = $this->getUnpaidSumOfTakeAway($pdo);
		
		
		$arrayOfProdsAndIdsOfATable = array("prods" => array(), "ids" => '');
		if ($showprepinwaiter == 1) {
			$arrayOfProdsAndIdsOfATable = $queue->getAllPreparedProductsForTableidAsArray($pdo,null);
		}
		$arrayOfProdsOfATable = $arrayOfProdsAndIdsOfATable['prods'];
		$numberOfProductsTotalToServe = $queue->numberOfProductsForTableNotDelivered($pdo,null);
		$numberOfReadyProducts = count($arrayOfProdsOfATable);
		$queueids = $this->getIdsFromProdList($arrayOfProdsOfATable);
		
		return array("roomstables" => $arrayOfRooms, "takeawayprice" => $priceTakeAway, 
				"takeawayprodcount" => $numberOfProductsTotalToServe,
				"takeawayprodready" => $numberOfReadyProducts,
				"takeawayReadyQueueIds" => $queueids
		);
	}

	function getIdsFromProdList($arrayOfProdsOfATable) {
		$idArr = array();
		if (!is_null($arrayOfProdsOfATable) && (count($arrayOfProdsOfATable) > 0)) {
			foreach($arrayOfProdsOfATable as $queueEntry) {
				$idArr[] = $queueEntry["id"];
			}
			return $idArr;
		} else {
			return array();
		}
	}

	
	function setRoomInfo($roomsAsJson,$togoworkprinter) {
		$rooms = json_decode($roomsAsJson, true);
		
		$pdo = DbUtils::openDbAndReturnPdoStatic();

		$pdo->beginTransaction();
		
		try {
			
			
			$sql = "UPDATE %resttables% SET removed=1";
			CommonUtils::execSql($pdo, $sql, null);
			
			$sql = "UPDATE %room% SET removed=1";
			CommonUtils::execSql($pdo, $sql, null);
			
			foreach($rooms as $aRoom) {
				$roomid = $aRoom["roomid"];
				$printer = $aRoom["printer"];
				if ($printer == 0) {
					$printer = null;
				}
				$name = trim($aRoom["name"]);
				$sorting = trim($aRoom["sorting"]);
				$abbreviation = trim($aRoom["abbreviation"]);
				
				if (!is_numeric($roomid)) {
					$sql = "INSERT INTO %room% (roomname,abbreviation,printer,sorting) VALUES(?,?,?,?)";
					CommonUtils::execSql($pdo, $sql, array($name,$abbreviation,$printer,$sorting));
					$roomid = $pdo->lastInsertId();
				} else {
					$sql = "UPDATE %room% SET removed=?,roomname=?,abbreviation=?,printer=?,sorting=? WHERE id=?";
					CommonUtils::execSql($pdo, $sql, array(null,$name,$abbreviation,$printer,$sorting,$roomid));
				}
				if (isset($aRoom["tables"])) {
					$tables = $aRoom["tables"];

					foreach($tables as $t) {
						$tableid = $t["id"];
						$tablename = $t["tablename"];
						$name = $t["name"];
						$code = "";
						if (isset($t["code"])) {
							$code = $t["code"];
						}
						$area = $t["area"];
						if ($area == 0) {
							$area = null;
						}
						$sorting = $t["sorting"];
						$active = $t["active"];
						$allowoutorder = $t["allowoutorder"];

						if (!is_numeric($tableid)) {
							$sql = "INSERT INTO %resttables% (tableno,roomid,code,name,area,active,allowoutorder,sorting) VALUES(?,?,?,?,?,?,?,?)";
							CommonUtils::execSql($pdo, $sql, array($tablename,$roomid,$code,$name,$area,$active,$allowoutorder,$sorting));
						} else {
							$sql = "UPDATE %resttables% SET removed=?,tableno=?,roomid=?,code=?,name=?,area=?,active=?,allowoutorder=?,sorting=? WHERE id=?";
							CommonUtils::execSql($pdo, $sql, array(null,$tablename,$roomid,$code,$name,$area,$active,$allowoutorder,$sorting,$tableid));
						}
					}
				}
			}
			
			$sql = "select %tablepos%.id as posid,%resttables%.removed FROM %tablepos%,%resttables% WHERE %resttables%.removed is not null AND %resttables%.id=%tablepos%.tableid";
			$result = CommonUtils::fetchSqlAll($pdo, $sql, null);
			foreach($result as $r) {
				$sql = "DELETE FROM %tablepos% WHERE id=?";
				CommonUtils::execSql($pdo, $sql, array($r["posid"]));
			};
			$sql = "select %tablemaps%.id as posid,%room%.removed FROM %tablemaps%,%room% WHERE %room%.removed is not null AND %room%.id=%tablemaps%.roomid";
			$result = CommonUtils::fetchSqlAll($pdo, $sql, null);
			foreach($result as $r) {
				$sql = "DELETE FROM %tablemaps% WHERE id=?";
				CommonUtils::execSql($pdo, $sql, array($r["posid"]));
			}
			
			$hist = new HistFiller();
			$hist->updateConfigInHist($pdo, "togoworkprinter", $togoworkprinter);
			
			$sql = "SELECT R.id as resid FROM %reservations% R,%resttables% T WHERE R.tableid=T.id AND T.removed is not null";
			$allReservIds = CommonUtils::fetchSqlAll($pdo, $sql, null);
			$sql = "DELETE FROM %reservations% WHERE id=?";
			foreach($allReservIds as $resid) {
				CommonUtils::execSql($pdo, $sql, array($resid["resid"]));
			}
			
			$pdo->commit();
		} catch (Exception $ex) {
			echo json_encode(array("status" => "ERROR","msg" => $ex->getMessage()));
			$pdo->rollBack();
			return;
		}
		$this->getRoomfieldAlsoInactive($pdo);
	}
	
	function getRoomfieldAlsoInactive($pdo = null) {
		if (is_null($pdo)) {
			$pdo = $this->dbutils->openDbAndReturnPdo();
		}
		$this->getRoomfieldCore($pdo, true);
	}
	
	function getRoomfield($pdo = null) {
		if (is_null($pdo)) {
			$pdo = DbUtils::openDbAndReturnPdoStatic();
		}
		$this->getRoomfieldCore($pdo, false);
	}
	
	function getRoomfieldCore($pdo,$includeInActiveTables) {
		
		$sql = "SELECT id,roomname,IFNULL(abbreviation,'') as abbreviation,IFNULL(printer,0) as printer,sorting FROM %room% WHERE removed is null ORDER BY 'sorting'";
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute();
		$result = $stmt->fetchAll();
		$numberOfRooms = count($result);

		$maxTables = 0;
		$roomArr = array();
		
		$where = "removed is null AND active='1'";
		if ($includeInActiveTables) {
			$where = "removed is null";
		}
		
		foreach($result as $row) {
			$roomid = $row['id'];
			$roomname = $row['roomname'];
			$abbreviation = $row['abbreviation'];
			$printer = $row['printer'];
			$roomsorting = $row['sorting'];
			
			$sql = "SELECT id,tableno,IFNULL(code,'') as code,IFNULL(name,'') as name,IFNULL(allowoutorder,0) as allowoutorder,IFNULL(sorting,1) as sorting,IFNULL(active,1) as active,IFNULL(area,0) as area FROM %resttables% WHERE roomid=? AND $where ORDER BY 'sorting'";
			$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
			$stmt->execute(array($row['id']));
			$numberOfTables = $stmt->rowCount();
			$maxTables = ($maxTables < $numberOfTables ? $numberOfTables : $maxTables);
			$tableresult = $stmt->fetchAll();
			
			$tableArr = array();
			foreach($tableresult as $aTable) {
				$tableArr[] = array("id" => $aTable['id'], "tablename" => $aTable['tableno'],"name" => $aTable['name'],"code" => $aTable['code'],"area" => $aTable['area'],"allowoutorder" => $aTable['allowoutorder'],"active" => $aTable['active'],"sorting" => $aTable['sorting']);
			}
			$roomArr[] = array("roomid" => $roomid, "roomname" => $roomname, "abbreviation" => $abbreviation, "printer" => $printer, "sorting" => $roomsorting, "tables" => $tableArr, "noOfTables" => $numberOfTables);
		}
		
		$togoworkprinter = CommonUtils::getConfigValue($pdo, "togoworkprinter", 0);
		
		echo json_encode(array("status" => "OK", "noOfRooms" => $numberOfRooms, "maxTables" => $maxTables, "roomfield" => $roomArr, "togoworkprinter" => $togoworkprinter));
	}
	
	public static function getTablesForGuestsystem($pdo) {
		$sql = "SELECT id,name,IFNULL(code,'') as code FROM %resttables% WHERE removed is null AND active=? AND allowoutorder=?";
		$result = CommonUtils::fetchSqlAll($pdo, $sql, array(1,1));
		return $result;
	}
	
	private static function createSingleQRCode($guesturl,$tablename,$tableid,$code,$addOnText,$guestqrsize,$guestqrfontsize,$version) {
		$arg = $guesturl . '/index.php?code=' . $code . "_" . $tableid . "_" . $version;
		$txt = '<div style="width:' . $guestqrsize . 'px;text-align:center;">';
		$txt .= 'Tisch: ' . $tablename . '<br>';
		if (!is_null($code) && ($code != '')) {
			$txt .= '<img src="utilities/osqrcode.php?cmd=link&arg=' . $arg . '" style="width:' . $guestqrsize . 'px;" /><br>';
		} else {
			$txt .= '<p><b>Tischcode wurde noch nicht zugewiesen</b><br>';
		}
		$txt .= '<p><span style="font-size:' . $guestqrfontsize . 'px;">' . $addOnText . '</span>';
		$txt .= '</div>';
		return $txt;
	}
	
	private static function createQrCodeForTables($pdo,$guesturl,$addOnText,$guestqrsize,$guestqrfontsize,$version) {
		$maxCols = round(500.0/($guestqrsize + 20));
		$allTables = self::getTablesForGuestsystem($pdo);
		$txt = '<table class="qrcodes">';
		$col = 0;
		foreach($allTables as $aTable) {
			$code = $aTable['code'];
			$tableid = $aTable['id'];
			$tablename = $aTable['name'];
			if ($col == 0) {
				$txt .= "<tr>";
			}
			$txt .= '<td>' . self::createSingleQRCode($guesturl, $tablename, $tableid, $code, $addOnText, $guestqrsize, $guestqrfontsize,$version);
			$col++;
			if ($col == $maxCols) {
				$col = 0;
				$txt .= "</tr>";
			}
		}
		$txt .= "</table>";
		return $txt;
	}
	
	private static function tableqrcodes() {
		header( "Expires: Mon, 20 Dec 1998 01:00:00 GMT" );
		header( "Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT" );
		header( "Cache-Control: no-cache, must-revalidate" );
		header( "Content-Type: text/html; charset=utf8" );
		
		$pdo = DbUtils::openDbAndReturnPdoStatic();
		
		$version = CommonUtils::getConfigValue($pdo, 'version', "0.0.0");
		$version = str_replace(".","",$version); 
		
		$guestUrl = CommonUtils::getConfigValue($pdo, 'guesturl', '');
		
		if (CommonUtils::strEndsWith($guestUrl, "/")) {
			$guestUrl = substr($guestUrl, 0, strlen($guestUrl) - 1);
		}
		
		if (CommonUtils::strEndsWith($guestUrl, "/index.php")) {
			$guestUrl = substr($guestUrl, 0, strlen($guestUrl) - strlen("/index.php"));
		}
		
		$guestqrtext = CommonUtils::getConfigValue($pdo, 'guestqrtext', '');
		$guestqrsize = CommonUtils::getConfigValue($pdo, 'guestqrsize', '');
		if (($guestqrsize < 20) || ($guestqrsize > 500)) {
			$guestqrsize = 150;
		}
		$guestqrfontsize = CommonUtils::getConfigValue($pdo, 'guestqrfontsize', '');
		if (($guestqrfontsize < 5) || ($guestqrfontsize > 50)) {
			$guestqrfontsize = 15;
		}
		if (is_null($guestUrl) || ($guestUrl == '')) {
			echo "Gastbestell-URL noch nicht konfiguriert";
			return;
		}
		
		$txt = "<html><head>";
		$txt .= "<title>Tisch QR-Codes für die Gastbestellung</title>";
		$txt .= '<meta http-equiv="content-type" content="text/html; charset=utf-8">';
		$txt .= '<link rel="stylesheet" type="text/css" href="../css/bestformat.css?v=1.6.7">';
		$txt .= "</head>";
		$txt .= "<body>";
		$txt .= "<h1>Tisch QR-Codes für die Gastbestellung</h1><p>";
		
		$txt .= self::createQrCodeForTables($pdo,$guestUrl,$guestqrtext,$guestqrsize,$guestqrfontsize,$version);
		$txt .= "</body></html>";
		echo $txt;
	}
}