<?php
// Datenbank-Verbindungsparameter
require_once ('dbutils.php');
require_once ('commonutils.php');
require_once ('admin.php');
require_once ('reports.php');
require_once ('utilities/pdfexport.php');

define('FPDF_FONTPATH','3rdparty/fpdf/font/');

class Bill {
	var $dbutils;
	var $t;

	private $P_SUM = array("Summe:","Sum:","Todo:");
	private $P_TOTAL = array("Total","Total","Total");
	private $P_MWST = array("MwSt","Tax","IVA");
	private $P_NETTO = array("Netto","Net","Neto");
	private $P_BRUTTO = array("Brutto","Gross","Bruto");
	private $P_ID = array("Id:","Id:","Id:");
	private $P_TABLE = array("Tisch:","Table:","Mesa:");
	private $P_WAITER = array("Es bediente Sie:", "Waiter:", "Camarero:");
	private $P_NO = array("Anz.", "No.", "Nú.");
	private $P_DESCR = array("Beschreibung","Description","Descripción");
	private $P_PRICE = array("Preis","Price","Precio");
	
	function __construct() {
		$this->dbutils = new DbUtils();
		require_once 'translations.php';
	}
	
	function handleCommand($command) {
		if ($command == 'exportCsv') {
			if ($this->hasCurrentUserAdminOrManagerRights()) {
				// yes, we can export the data
				$this->exportCsv($_GET['startMonth'],$_GET['startYear'],$_GET['endMonth'],$_GET['endYear']);			
			} else {
				echo json_encode(array("status" => "ERROR", "code" => ERROR_BILL_NOT_AUTHOTRIZED, "msg" => ERROR_BILL_NOT_AUTHOTRIZED_MSG));
			}
			return;
		}
		if ($command == 'exportPdfReport') {
			if ($this->hasCurrentUserAdminOrManagerRights()) {
				$this->exportPdfReport($_GET['lang'],$_GET['startMonth'],$_GET['startYear'],$_GET['endMonth'],$_GET['endYear']);
			} else {
				echo "Benutzer nicht berechtigt";
			}
			return;
		}
		if ($command == 'exportPdfSummary') {
			if ($this->hasCurrentUserAdminOrManagerRights()) {
				$this->exportPdfSummary($_GET['lang'],$_GET['startMonth'],$_GET['startYear'],$_GET['endMonth'],$_GET['endYear']);
			} else {
				echo "Benutzer nicht berechtigt";
			}
			return;
		}
		
		if ($command == 'exportCsvOfClosing') {
			if ($this->hasCurrentUserAdminOrManagerRights()) {
				// yes, we can export the data
				$this->exportCsvOfClosing($_GET['closingid']);
			} else {
				echo json_encode(array("status" => "ERROR", "code" => ERROR_MANAGER_NOT_AUTHOTRIZED, "msg" => ERROR_MANAGER_NOT_AUTHOTRIZED_MSG));
			}
			return;
		}
		
		if ($command == 'doCashAction') {
			if ($this->hasCurrentUserPaydeskRights()) {
				$this->doCashAction($_POST['money']);
			} else {
				echo json_encode(array("status" => "ERROR", "code" => ERROR_PAYDESK_NOT_AUTHOTRIZED, "msg" => ERROR_PAYDESK_NOT_AUTHOTRIZED_MSG));
			}
			return;
		} else if ($command == 'getCashOverviewOfUser') {
			if ($this->hasCurrentUserPaydeskRights()) {
				$this->getCashOverviewOfUser();
			} else {
				echo json_encode(array("status" => "ERROR", "code" => ERROR_PAYDESK_NOT_AUTHOTRIZED, "msg" => ERROR_PAYDESK_NOT_AUTHOTRIZED_MSG));	
			}
			return;
		}
		
		if ($this->hasCurrentUserBillRights()) {
			if ($command == 'getLastBillsWithContent') {
				$this->getLastBillsWithContent($_GET['day'],$_GET['month'],$_GET['year']);
			} else if ($command == 'cancelBill') {
				$this->cancelBill($_POST['billid'],$_POST['stornocode']);
			}
		} else {
			echo json_encode(array("status" => "ERROR", "code" => ERROR_BILL_NOT_AUTHOTRIZED, "msg" => ERROR_BILL_NOT_AUTHOTRIZED_MSG));
		}
	}

	// for internal request
	private function hasCurrentUserBillRights() {
		session_start();
		if (!isset($_SESSION['angemeldet']) || !$_SESSION['angemeldet']) {
			// no user logged in
			return false;
		} else {
			return ($_SESSION['right_bill']);
		}
	}
	
	private function hasCurrentUserPaydeskRights() {
		session_start();
		if (!isset($_SESSION['angemeldet']) || !$_SESSION['angemeldet']) {
			// no user logged in
			return false;
		} else {
			return ($_SESSION['right_paydesk']);
		}
	}
	
	// for internal request
	private function hasCurrentUserAdminOrManagerRights() {
		session_start();
		if (!isset($_SESSION['angemeldet']) || !$_SESSION['angemeldet']) {
			// no user logged in
			return false;
		} else {
			return ($_SESSION['right_manager'] || $_SESSION['is_admin']);
		}
	}
	
	/**
	 * get the content of a bill (to be used for printserver etc.)
	 * 
	 * @param unknown $billid
	 */
	function getBillWithId($billid,$language,$printer) {
		set_time_limit(120);
		$pdo = $this->dbutils->openDbAndReturnPdo();

		// is bill correct with signature?
		$commonUtils = new CommonUtils();
		$correct = $commonUtils->verifyBill($pdo, $billid);
		if (!$correct) {
			echo json_encode(array("status" => "ERROR", "code" => ERROR_INCONSISTENT_DB, "msg" => ERROR_INCONSISTENT_DB_MSG));
			return;
		}
		
		// first: get the bill overall data
		
		// is the bill for a table or togo
		$sql = "SELECT tableid FROM %bill% WHERE id=?";
		$stmt = $pdo->prepare(DbUtils::substTableAlias($sql));
		$stmt->execute(array($billid));
		$row = $stmt->fetchObject();

		$sql = "SELECT count(id) as countid FROM %queue% WHERE billid=?";
		$stmt = $pdo->prepare(DbUtils::substTableAlias($sql));
		$stmt->execute(array($billid));
		$qrow = $stmt->fetchObject();
		
		if ($qrow->countid == 0) {
			if ($row->tableid == 0) {
				// togo
				$sql = "SELECT DISTINCT billdate,brutto,netto,'-' as tablename,username,host FROM %bill%,%user% WHERE %bill%.id=? AND userid=%user%.id AND tableid='0' ";
			} else {
				$sql = "SELECT DISTINCT billdate,brutto,netto,tableno as tablename,username,host FROM %bill%,%user%,%resttables% WHERE %bill%.id=? AND userid=%user%.id AND tableid=%resttables%.id ";
			}
		} else {
			if ($row->tableid == 0) {
				// togo
				$sql = "SELECT DISTINCT billdate,brutto,netto,'-' as tablename,username,host FROM %bill%,%user%,%queue% WHERE %bill%.id=? AND %bill%.id=%queue%.billid AND userid=%user%.id AND tableid='0' AND paidtime is not null ";
			} else {
				$sql = "SELECT DISTINCT billdate,brutto,netto,tableno as tablename,username,host FROM %bill%,%user%,%resttables%,%queue% WHERE %bill%.id=? AND %bill%.id=%queue%.billid AND userid=%user%.id AND tableid=%resttables%.id AND paidtime is not null ";
			}
		}
		$stmt = $pdo->prepare(DbUtils::substTableAlias($sql));
		$stmt->execute(array($billid));
		$row = $stmt->fetchObject();
		
		if ($row == null) {
			// no rows found -> deliver no content
			echo json_encode(array("billoverallinfo" => array()));
			return;
		} else {
			if (is_null($row->host)) {
				$host = 0; // default
			} else {
				$host = $row->host;
			}
			$thetimedate = $row->billdate;
			$thetimedate_arr = explode ( ' ', $thetimedate );
			$thedate = $thetimedate_arr[0];
			$datearr = explode ( '-', $thedate );
			$day = sprintf("%02s", $datearr[2]);
			$month = sprintf("%02s", $datearr[1]);
			$year = sprintf("%04s", $datearr[0]);
			$thetime = $thetimedate_arr[1];
			$thetimearr = explode ( ':', $thetime );
			$hour = $thetimearr[0];
			$min = $thetimearr[1];
			$thetimedate = "$day.$month.$year $hour:$min";

			$billoverallinfo = array(
					"id" => $billid,
					"billdate" => $thetimedate,
					"billday" => $day,
					"billmonth" => $month,
					"billyear" => $year,
					"billhour" => $hour,
					"billmin" => $min,
					"brutto" => $row->brutto,
					"netto" => $row->netto,
					"table" => $row->tablename,
					"username" => $row->username,
					"printer" => $printer,
					"host" => $host
			);

			$billtranslations = array(
					"sum" => $this->P_SUM[$language],
					"total" => $this->P_TOTAL[$language],
					"mwst" => $this->P_MWST[$language],
					"netto" => $this->P_NETTO[$language],
					"brutto" => $this->P_BRUTTO[$language],
					"id" => $this->P_ID[$language],
					"table" => $this->P_TABLE[$language],
					"waiter" => $this->P_WAITER[$language],
					"no" => $this->P_NO[$language],
					"descr" => $this->P_DESCR[$language],
					"price" => $this->P_PRICE[$language]
			);
		}
		
		// now get all products of this bill
		$sql = "select productname,price,%pricelevel%.name as pricelevelname,count(%queue%.productname) as count from %bill%,%queue%,%pricelevel% where %bill%.id=? and %queue%.billid=%bill%.id AND paidtime is not null AND %queue%.pricelevel = %pricelevel%.id group by productname,price,pricelevelname";
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute(array($billid));
		$result = $stmt->fetchAll();
		
		$prodarray = array();
		foreach($result as $zeile) {
			$prodarray[] = array("count" => $zeile['count'],
					"productname" => $zeile['productname'],
					"pricelevel" => $zeile['pricelevelname'],
					"price" => $zeile['price']
			);
		}
		
		
		$sql = "select tax,round(sum(price) - sum(price / (1.0 + tax/100.0)),2) as mwst, round(sum(price / (1.0 + tax/100.0)),2) as netto, sum(price) as brutto FROM %queue% WHERE billid=? group by tax ORDER BY tax";
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute(array($billid));
		$result = $stmt->fetchAll(PDO::FETCH_OBJ);
		
		$out = array("billoverallinfo" => $billoverallinfo,"translations" => $billtranslations,"products" => $prodarray, "taxes" => $result);
		return $out;
	}

	
	/*
	 * insert or take out cash money. The direction done by sign of $money value
	 */
	private function doCashAction($money) {
		// current time
		date_default_timezone_set(DbUtils::getTimeZone());
		$currentTime = date('Y-m-d H:i:s');
		
		$pdo = $this->dbutils->openDbAndReturnPdo();
		$pdo->beginTransaction();
		
		$sql = "SELECT sum(brutto) as bruttosum FROM %bill% WHERE closingid is null AND paymentid='1'";
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute();
		$row =$stmt->fetchObject();
		if ($row != null) {
			$sum = $row->bruttosum;
			if (is_null($sum)) {
				// no transaction after last closing
				$sum = 0.0;
			}
			if (($sum + floatval($money)) >= 0.0) {
				
				// Test if it is allowed to insert new bill as storno bill or if manipulation has happened
				$nextbillid = $this->testForNewBillIdAndUpdateWorkTable($pdo);
				if ($nextbillid < 0) {
					echo json_encode(array("status" => "ERROR", "code" => ERROR_INCONSISTENT_DB, "msg" => ERROR_INCONSISTENT_DB_MSG));
					$pdo->rollBack();
				}
				
				$userId = $this->getUserId();
				// now calculate the signature for the bill entry
				$commonUtils = new CommonUtils();
				$signature = $commonUtils->calcSignatureForBill($pdo,$currentTime, $money, $money, 0.0, $userId);
				
				$sql = "INSERT INTO `%bill%` (`id` , `billdate`,`brutto`,`netto`,`tax`,`tableid`, `status`, `paymentid`,`userid`,`ref`,`signature`) VALUES ( ?, ? , ?,?,?, ?, 'c', ?,?,?,?)";
				$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
				$stmt->execute(array($nextbillid,$currentTime,$money,$money,'0.00',-1,1,$userId,NULL,$signature));
				
				$pdo->commit();
				echo json_encode(array("status" => "OK"));
			} else {
				echo json_encode(array("status" => "ERROR", "code" => ERROR_BILL_LESS_MONEY_TO_TAKE_OUT, "msg" => ERROR_BILL_LESS_MONEY_TO_TAKE_OUT_MSG));
			}
		} else {
			$pdo->rollBack();
			echo json_encode(array("status" => "ERROR", "code" => ERROR_GENERAL_PAYDESK_SUM, "msg" => ERROR_GENERAL_PAYDESK_SUM_MSG));
			return;
		}
	}
	
	/*
	 * User may ask what money he should have in his pocket by serving the guests. If the inserts and 
	 * take outs are in in his waiter paydesk then this value is of interest, too. Return both.
	 */
	function getCashOverviewOfUser() {
		$userId = $this->getUserId();
		
		// without cash insert and cash takeout
		$onlyCashByGuests = 0.0;
		$pdo = $this->dbutils->openDbAndReturnPdo();
		$sql = "SELECT sum(brutto) as sumtotal FROM %bill% WHERE closingid is null AND status is null AND paymentid=1 AND userid='$userId'";
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute();
		$row =$stmt->fetchObject();
		if ($row != null) {
			if ($row->sumtotal != null) {
				$onlyCashByGuests = $row->sumtotal;
			}
		}
		
		// with cash
		$cashByGuestsAndInsertTakeOut = 0.0;
		$sql = "SELECT sum(brutto) as sumtotal FROM %bill% WHERE closingid is null AND paymentid='1' AND userid='$userId' AND (status is null OR status ='c')";
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute();
		$row =$stmt->fetchObject();
		if ($row != null) {
			if ($row->sumtotal != null) {
				$cashByGuestsAndInsertTakeOut = $row->sumtotal;
			}
		}
		echo json_encode(array("guestmoney" => $onlyCashByGuests, "total" => $cashByGuestsAndInsertTakeOut));
	}
	
	function getLastBillsWithContent($day,$month,$year) {
		date_default_timezone_set(DbUtils::getTimeZone());
		$currentTime = date('Y-m-d H:i:s');
		$startDate = "$year-$month-$day 00:00:00";
		$endDate = "$year-$month-$day 23:59:59";
		
		$whenClause = " (billdate >= ? AND billdate <= ?)";
		
		// search for the bill language
		$pdo = $this->dbutils->openDbAndReturnPdo();
		$admin = new Admin();
		$genValues = $admin->getGeneralConfigItems(false, $pdo);
		$l = $genValues['billlanguage'];
		
		$commonUtils = new CommonUtils();
		
		$sql = "SELECT id,billdate,brutto,tableid,closingid,status FROM %bill% WHERE tableid >= '0' AND status is null AND $whenClause ORDER BY billdate DESC ";
		$stmt = $pdo->prepare(DbUtils::substTableAlias($sql));
		$stmt->execute(array($startDate,$endDate));
		$result = $stmt->fetchAll();

		$resultarray = array();
		foreach($result as $zeile) {
			$theId = $zeile['id'];
			if (!$commonUtils->verifyBill($pdo, $theId)) {
				mysqli_free_result( $dbresult );
				echo json_encode(array("status" => "ERROR", "code" => ERROR_INCONSISTENT_DB, "msg" => ERROR_INCONSISTENT_DB_MSG));
				return;
			}
			date_default_timezone_set(DbUtils::getTimeZone());
			$date = new DateTime($zeile['billdate']);
			$shortdate = $date->format('H:i');
			$closingID = $zeile['closingid'];
			$isClosed = (is_null($closingID) ? 0 : 1);

			$arr = array("id" => $theId,
					"longdate" => $zeile['billdate'],
					"shortdate" => $shortdate,
					"brutto" => $zeile['brutto'],
					"tablename" => $commonUtils->getTableNameFromId($zeile['tableid']),
					"billcontent" => $this->getBillWithId($theId,$l,0),
					"isClosed" => $isClosed
			);

			$resultarray[] = $arr;
		}

		// insert also the host-html just in case it is needed
		$hosthtml = file_get_contents("../customer/bon-bewirtungsvorlage.html");
		
		ob_start();
		echo json_encode(array("status" => "OK", "code" => OK, "msg" => $resultarray, "hosthtml" => $hosthtml));
		ob_end_flush();
	}

	private function getUserId() {
		if(session_id() == '') {
			session_start();
		}
		return $_SESSION['userid'];
	}

	/**
	 * Test if it is allowed to insert new bill as storno bill or if manipulation has happened
	 * 
	 * Returns (-1) in case of an error, a positive return value is the new id, (which is already updated in work table)
	 */
	private function testForNewBillIdAndUpdateWorkTable($pdo) {
		$commonUtils = new CommonUtils();
		$sql = "SELECT MAX(id) as maxbillid FROM %bill%";
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute();
		$row = $stmt->fetchObject();
		$nextbillid = intval($row->maxbillid) + 1;
		if (!$commonUtils->verifyLastBillId($pdo, $nextbillid)) {
			return (-1);
		} else {
			// ok - then increment that last id in the work table
			$commonUtils->setLastBillIdInWorkTable($pdo, $nextbillid);
			return $nextbillid;
		}
	}
	
	/*
	 * Cancel a bill - set all queue items to not paid and drop the bill entry
	 */
	private function cancelBill($billid,$stornocode) {
		// current time
		date_default_timezone_set(DbUtils::getTimeZone());
		$currentTime = date('Y-m-d H:i:s');
		
		// check if stornocode is correct
		$sql = "SELECT setting FROM %config% WHERE name='stornocode'";
		$dbresult = $this->dbutils->performSqlCommand($sql);
		$numberOfVals = mysqli_num_rows($dbresult);
		if ($numberOfVals != 1) {
			// stornocode not fixed
			mysqli_free_result( $dbresult );
			echo json_encode(array("status" => "ERROR", "code" => ERROR_BILL_NOT_STORNO_CODE, "msg" => ERROR_BILL_NOT_STORNO_CODE_MSG));
			return;
		}
		
		$zeile = mysqli_fetch_array( $dbresult, MYSQL_ASSOC);
		$stornocodeInDb = $zeile['setting'];
		
		mysqli_free_result( $dbresult );
		if ($stornocode != $stornocodeInDb) {
			echo json_encode(array("status" => "ERROR", "code" => ERROR_BILL_WRONG_STORNO_CODE, "msg" => ERROR_BILL_WRONG_STORNO_CODE_MSG));
			return;
		}
		
		if (!is_numeric($billid)) {
			// this may be an attack...
			echo json_encode(array("status" => "ERROR", "code" => ERROR_BILL_WRONG_NUMERIC_VALUE, "msg" => ERROR_BILL_WRONG_NUMERIC_VALUE_MSG));
			return;
		}
		
		// Do transactional cancel
		
		$pdo = $this->dbutils->openDbAndReturnPdo();
		$pdo->beginTransaction();
		
		// is the bill already closed? In this case no cancel is allowed!
		$sql = "SELECT brutto,netto,tax,tableid,closingid,status,paymentid FROM %bill% WHERE id=?";
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute(array($billid));
		$row =$stmt->fetchObject();
		$closingId = null;
		if ($row != null) {
			$closingId = $row->closingid;
			
			// save the next data for a copy!
			$brutto = $row->brutto;
			$netto = $row->netto;
			$tax = $row->tax;
			$tableid = $row->tableid;
			$status = $row->status;
			$paymentid = $row->paymentid;
		}
		
		if (!is_null($closingId) || ($status == 's') || ($status == 'x')) {
			// no cancel possible anymore!
			$pdo->rollBack();
			if (($status == 's') || ($status == 'x')) {
				echo json_encode(array("status" => "ERROR", "code" => ERROR_BILL_ALREADY_CANCELLED, "msg" => ERROR_BILL_ALREADY_CANCELLED_MSG));
			} else {
				echo json_encode(array("status" => "ERROR", "code" => ERROR_BILL_ALREADY_CLOSED, "msg" => ERROR_BILL_ALREADY_CLOSED_MSG));
			}
			
			return;
		}
		
		// is bill correct with signature?
		$commonUtils = new CommonUtils();
		$correct = $commonUtils->verifyBill($pdo, $billid);
		if (!$correct) {
			$pdo->rollBack();
			echo json_encode(array("status" => "ERROR", "code" => ERROR_INCONSISTENT_DB, "msg" => ERROR_INCONSISTENT_DB_MSG));
			return;
		}
		
		// Test if it is allowed to insert new bill as storno bill or if manipulation has happened
		$nextbillid = $this->testForNewBillIdAndUpdateWorkTable($pdo);
		if ($nextbillid < 0) {
			echo json_encode(array("status" => "ERROR", "code" => ERROR_INCONSISTENT_DB, "msg" => ERROR_INCONSISTENT_DB_MSG));
			$pdo->rollBack();
			return;
		}
		
		// 0. find the queueitems that are related to that bill
		$sql = "SELECT id FROM %queue% WHERE billid=?";
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute(array($billid));
		$result = $stmt->fetchAll();
		$queueIdArray = array();
		
		foreach($result as $row) {
			$queueIdArray[] = $row['id'];
		}
		
		// 1. clear connection between queue item and bill
		$sql = "UPDATE %queue% SET paidtime=null,billid=null WHERE billid=?";
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute(array($billid));
		
		// 2. copy bill with negativ brutto as part of storno
		$userIdOfStornoUser = $this->getUserId();
		$stornval = 0.0 - floatval($brutto);
		$stornonettoval = 0.0 - floatval($netto);
		
		$commonUtils = new CommonUtils();
		$signature = $commonUtils->calcSignatureForBill($pdo,$currentTime, $stornval, $stornonettoval, $tax, $userIdOfStornoUser);
		
		$sql = "INSERT INTO `%bill%` (`id` , `billdate`,`brutto`,`netto`,`tax`,`tableid`, `status`, `paymentid`,`userid`,`ref`,`host`,`signature`) VALUES ( ?, ? , ?, ?,?,?, 's', ?,?,?,?,?)";
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute(array($nextbillid,$currentTime,$stornval,$stornonettoval,$tax,$tableid,$paymentid,$userIdOfStornoUser,$billid,0,$signature));
		$refIdOfStornoEntry = $pdo->lastInsertId();
		
		// 3. mark bill as part of storno
		$sql = "UPDATE %bill% SET status='x', closingid=null, ref=? WHERE id=?";
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute(array($refIdOfStornoEntry,$billid));

		// 4. now put the queue items into the billproducts so that later storno is evaluable
		foreach ($queueIdArray as $aQueueid) {
			$billProdsSql = "INSERT INTO `%billproducts%` (`queueid` , `billid`) VALUES ( ?,?)";
			$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($billProdsSql));
			$stmt->execute(array($aQueueid,$refIdOfStornoEntry));
		}

		$pdo->commit();
		// end of transactional cancel
		
		echo json_encode(array("status" => "OK", "code" => OK));
		return;
	}
	
	private function exportPdfReport($startMonth,$startYear,$endMonth,$endYear) {
		$pdfExport = new PdfExport();
		$pdfExport->exportPdfReport($_GET['lang'],$_GET['startMonth'],$_GET['startYear'],$_GET['endMonth'],$_GET['endYear']);
	}
	private function exportPdfSummary($startMonth,$startYear,$endMonth,$endYear) {
		$pdfExport = new PdfExport();
		$pdfExport->exportPdfSummary($_GET['lang'],$_GET['startMonth'],$_GET['startYear'],$_GET['endMonth'],$_GET['endYear']);
	}
	
	private function exportCsv($startMonth,$startYear,$endMonth,$endYear) {
		$this->exportCsv_bin($startMonth,$startYear,$endMonth,$endYear,null);
	}
	
	/*
	 * Method to export data of a special closing
	 */
	private function exportCsvOfClosing($closingid) {
		$this->exportCsv_bin(null,null,null,null,$closingid);
	}
	
	private function getDecPoint() {
		$sql = "SELECT name,setting FROM %config% WHERE name=?";
		$pdo = $this->dbutils->openDbAndReturnPdo();
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute(array("decpoint"));
		$row = $stmt->fetchObject();
		return($row->setting);
	}
	
	private function exportCsv_bin($startMonth,$startYear,$endMonth,$endYear,$onlyClosingId) {
		if(session_id() == '') {
			session_start();
		}
		$l = $_SESSION['language'];
		
		$commonUtils = new CommonUtils();
		$currency = $commonUtils->getCurrency();
		
		$decpoint = $this->getDecPoint();
		if ($onlyClosingId == null) {
			if ($startMonth < 10) {
				$startMonth = "0" . $startMonth;
			}
			if ($endMonth < 10) {
				$endMonth = "0" . $endMonth;
			}
			$startDate = $startYear . "-" . $startMonth . "-01 00:00:00";
			// now find last day of month of end date!
			$endDate = $endYear . "-" . $endMonth . "-01";
			$lastdayOfMonth = date("t", strtotime($endDate));
			$endDate = $endYear . "-" . $endMonth . "-" . $lastdayOfMonth . " 23:59:59";
		}
		
		$file_name = "datenexport.csv";
		header("Content-type: text/x-csv");
		header("Content-Disposition: attachment; filename=$file_name");
		header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
		header("Pragma: no-cache");
		header("Expires: 0");
		
		$firstCsvPart = $this->t['ID'][$l] . ";" . $this->t['Date'][$l] . ";" . $this->t['Brutto'][$l] . "($currency);";
		$firstCsvPart .= $this->t['Netto'][$l] . "($currency);";
		$firstCsvPart .= $this->t['State'][$l] . ";" . $this->t['Ref'][$l] . ";";
		$firstCsvPart .= $this->t['host'][$l] . ";";
		$firstCsvPart .= $this->t['Userid'][$l] . ";" . $this->t['User'][$l] . ";";
		
		if ($onlyClosingId == null) {
			$ret = $firstCsvPart . $this->t['ClosId'][$l] . ";" . $this->t['ClosDate'][$l] . ";" . $this->t['PayWay'][$l] . ";" . $this->t['ClosRemark'][$l] . "\n";
			echo $ret;
		} else {
			// closing id is know - do not output unnecessary info
			$ret = $firstCsvPart . $this->t['PayWay'][$l] . "\n";
			echo $ret;
		}
		
		// first get the billids for that closing
		$billIdsForThatClosing = array();
		
		$payment_lang = array("name","name_en","name_esp");
		$payment_col = $payment_lang[$l];
		
		$sql = "SELECT DISTINCT %bill%.id,%bill%.signature,billdate,brutto,netto,IF(tax is not null, tax, '0.00') as tax,status,closingdate,remark,%bill%.host,%bill%.closingid,%payment%.$payment_col as payway,userid,ref,username FROM %bill%,%closing%,%payment%,%user% ";
		$sql .= "WHERE closingid is not null AND %bill%.closingid=%closing%.id ";
		$sql .= " AND %bill%.paymentid=%payment%.id ";
		if ($onlyClosingId == null) {
			// search for time span
			$sql .= " AND %bill%.billdate BETWEEN '$startDate' AND '$endDate' ";
		} else {
			// search for a special closing id
			$sql .= " AND closingid='$onlyClosingId' ";
		}
	
		$sql .= " AND %bill%.userid = %user%.id ";
		$sql .= "ORDER BY billdate";
		
		$dbresult = $this->dbutils->performSqlCommand($sql);
		
		$retValues = array();
		
		while ($zeile = mysqli_fetch_array( $dbresult, MYSQL_ASSOC)) {
			$billid = $zeile['id'];
			$billdate = $zeile['billdate'];
			
			$brutto_orig = $zeile['brutto'];
			$netto_orig = $zeile['netto'];
			$tax_orig = $zeile['tax'];
			
			$brutto = str_replace(".",$decpoint,$brutto_orig);
			$netto = str_replace(".",$decpoint,$netto_orig);
			$tax = str_replace(".",$decpoint,$tax_orig);
			$signature = $zeile['signature'];
			$status = $zeile['status'];
			if ($status == 'x') {
				$status = $this->t["laterCancelled"][$l];
			} else if ($status == 's') {
				$status = $this->t["storno"][$l];
			} else if ($status == 'c') {
				$status = $this->t["cashact"][$l];
			} else {
				$status = "";
			}
			$ref = ($zeile['ref'] == null ? "" : $zeile['ref']);
			$userid = $zeile['userid'];
			$username = $zeile['username'];
			$closingid = $zeile['closingid'];
			$closingdate = $zeile['closingdate'];
			$remark = '"' . addslashes($zeile['remark']) . '"';
			$paymentname = '"' . addslashes($zeile['payway']) . '"';
			$host = ($zeile['host'] == 1 ? "x" : "-");
			
			// verifyBillByValues($billdate,$brutto,$netto,$tax,$userid,$signature) {
			if (!$commonUtils->verifyBillByValues(null,$billdate, $brutto_orig, $netto_orig, $tax_orig, $userid, $signature)) {
				echo "Inconsistent Data Base Content!\n";
				mysqli_free_result( $dbresult );
				return;
			}
			
			if ($billid == null) {
				$billid = "-";
			}
			
			if ($onlyClosingId == null) {
				echo "$billid ; $billdate; $brutto; $netto; $status; $ref; $host; $userid;$username ; $closingid; $closingdate; $paymentname; $remark\n";
			} else {
				echo "$billid ; $billdate; $brutto; $netto; $status; $ref; $host; $userid;$username ; $paymentname\n";
			}
		}
		mysqli_free_result( $dbresult );
	}
}
?>