ordersprinter/webapp/php/printqueue.php

<?php
// Datenbank-Verbindungsparameter
require_once ('config.php');
require_once ('globals.php');
require_once ('dbutils.php');
require_once ('bill.php');
require_once ('closing.php');

class PrintQueue {
	var $dbutils;
	var $userrights;
	var $admin;
	
	function __construct() {
		$this->dbutils = new DbUtils();
		$this->userrights = new Userrights();
		$this->admin = new Admin();
	}
	
	function handleCommand($command) {
		$fl = null;
		if (isset($_GET['fl'])) {
			$fl = $_GET['fl'];
		}
		// these command are only allowed for user with waiter rights
		if ($command == 'getNextReceiptPrintJobs') {
			if(isset($_GET['printers'])) {
				$this->getNextReceiptPrintJobs($_POST['pass'],$_GET['language'],$_GET['printers'],$fl);
			} else {
				$this->getNextReceiptPrintJobs($_POST['pass'],$_GET['language'],"1,2,3,4,5,6",$fl);
			}
		} else if ($command == 'getNextClosingPrintJobs') {
			$this->getNextClosingPrintJobs($_POST['pass'],$_GET['language'],$fl);
		} else if ($command == 'getNextFoodWorkPrintJobs') {
			if (isset($_GET['printer'])) {
				$this->getNextFoodWorkPrintJobs($_GET['printer'],$_POST['pass'],$fl);
			} else {
				$this->getNextFoodWorkPrintJobs(null,$_POST['pass'],$fl);
			}
		} else if ($command == 'getNextDrinkWorkPrintJobs') {
			if (isset($_GET['printer'])) {
				$this->getNextDrinkWorkPrintJobs($_GET['printer'],$_POST['pass'],$fl);
			} else {
				$this->getNextDrinkWorkPrintJobs(null,$_POST['pass'],$fl);
			}
		} else if ($command == 'deletePrintJob') {
			$this->deletePrintJob($_POST['pass'],$_POST['id']);
		} else if ($command == 'queueReceiptPrintJob') {
			if (isset($_POST['useaddrecprinter'])) {
			    $this->queueReceiptPrintJob($_POST['billid'],$_POST['useaddrecprinter']);
			} else {
			    $this->queueReceiptPrintJob($_POST['billid'],0);
			}
		} else if ($command == 'queueClosingSummary') {
			$this->queueClosingSummary($_GET['closingid']);
		} else if ($command == 'testConnection') {
			$this->testConnection($_POST['pass']);
		} else if ($command == 'getReceiptConfig') {
			$this->getReceiptConfig();
		} else if ($command == 'getLogoAsPng') {
			$this->getLogoAsPng();
		} else if ($command == 'getLogoAsWbmp') {
			$this->getLogoAsWbmp();
		} else if ($command == 'getPrintJobOverview') {
			$pdo = DbUtils::openDbAndReturnPdoStatic();
			$this->getPrintJobOverview($pdo);
		} else if ($command == 'clearprintjobs') {
			$pdo = DbUtils::openDbAndReturnPdoStatic();
			$this->clearprintjobs($pdo);
		} else if ($command == 'batchReceiptPrintJob') {
			$this->batchReceiptPrintJob($_POST['start'],$_POST['end']);
		} else if ($command == 'getLastLog') {
			$this->getLastLog($_POST['pass']);
		} else if ($command == 'deleteSpooledPrintJob') {
			$this->deleteSpooledPrintJob($_POST['id']);
		} else {
			echo "Kommando nicht erkannt!";
		}
	}
	
	private function saveLastPrintServerAccess($pdo) {
	    date_default_timezone_set(DbUtils::getTimeZone());
	    $date = new DateTime();
	    $unixTimeStamp = $date->getTimestamp();
	    $sql = "SELECT count(id) as countid FROM %work% WHERE item=?";
	    $stmt = $pdo->prepare(DbUtils::substTableAlias($sql));
	    $stmt->execute(array('lastprtserveraccess'));
	    $row = $stmt->fetchObject();
	    if ($row->countid == 0) {
		$sql = "INSERT INTO %work% (item,value,signature) VALUES(?,?,?)";
		$stmt = $pdo->prepare(DbUtils::substTableAlias($sql));
		$stmt->execute(array('lastprtserveraccess',$unixTimeStamp,null));
	    } else {
		$sql = "UPDATE %work% SET value=? WHERE item=?";
		$stmt = $pdo->prepare(DbUtils::substTableAlias($sql));
		$stmt->execute(array($unixTimeStamp,'lastprtserveraccess'));
	    }
	}
	
	function testConnection($md5pass) {
		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( "Pragma: no-cache" );
		header( "Content-Type: text/html; charset=utf8" );
		
		$isCorrect = $this->isPasswordCorrect(null,$md5pass,true);
		if ($isCorrect) {
			echo "ok";
		} else {
			// Output from isPasswordCorrect method already
			// echo " - false -";
		}
	}
	
	/*
	 * Insert a "work" (food or drink) job into the printjob queue. The POS Print Server will
	 * pick these jobs and delete them after successful printing
	 */
	public static function queueWorkPrintJob($pdo,$table,$timestamp,$prods,$kind,$printer,$username) {		
		$table .= " ($username)";
		
		$content = json_encode(array("table" => $table, "time" => $timestamp, "products" => $prods));

		$printInsertSql = "INSERT INTO `%printjobs%` (`id` , `content`,`type`,`printer`) VALUES ( NULL,?,?,?)";
		$stmt = $pdo->prepare(DbUtils::substTableAlias($printInsertSql));
		$stmt->execute(array($content,intval($kind) + 1,$printer));
		
		$idOfWorkJob = $pdo->lastInsertId();
		
		CommonUtils::log($pdo,"QUEUE","Create work job with id=$idOfWorkJob for tableid $table from user $username of kind $kind for printer=$printer");
	}

	function getPrintJobOverview($pdo) {
		if (!($this->userrights->hasCurrentUserRight('right_manager')) &&
				!($this->userrights->hasCurrentUserRight('is_admin'))
		) {
			echo json_encode(array("status" => "ERROR", "code" => ERROR_DB_PRIVS_MISSING, "msg" => ERROR_DB_PRIVS_MISSING_MSG));
			return;
		}
		
		$jobs = array();
		for ($printer=1;$printer<7;$printer++) {
			$sql = "SELECT %printjobs%.id as id,%bill%.id as billid,billdate,brutto,%resttables%.tableno as tablename FROM %printjobs%,%bill%,%resttables% WHERE printer=? AND type != '1' AND type != '2' AND content=%bill%.id AND %bill%.tableid=%resttables%.id";
			$result = CommonUtils::fetchSqlAll($pdo, $sql, array($printer));
			$jobs[] = array("printer" => $printer, "count" => count($result),"jobs" => $result);
		}
		
		$sql = "SELECT %printjobs%.id as id,content FROM %printjobs% WHERE type=?";
		$stmt = $pdo->prepare(DbUtils::substTableAlias($sql));
		$stmt->execute(array(1));
		$result = $stmt->fetchAll();
		$works = array();
		foreach($result as $r) {
			$works[] = array("id" => $r['id'],"content" => json_decode($r['content']));
		}
		$jobs[] = array("printer" => 7, "count" => count($result),"jobs" => $works);
		$stmt->execute(array(2));
		$result = $stmt->fetchAll();
		$works = array();
		foreach($result as $r) {
			$works[] = array("id" => $r['id'],"content" => json_decode($r['content']));
		}
		$jobs[] = array("printer" => 8, "count" => count($result),"jobs" => $works);
		
		echo json_encode(array("status" => "OK", "msg" => $jobs));
	}
	
	function clearprintjobs($pdo) {
	    if (!($this->userrights->hasCurrentUserRight('right_manager')) &&
				!($this->userrights->hasCurrentUserRight('is_admin'))
		) {
			echo json_encode(array("status" => "ERROR", "code" => ERROR_DB_PRIVS_MISSING, "msg" => ERROR_DB_PRIVS_MISSING_MSG));
			return;
		}
	    $sql = "DELETE FROM %printjobs%";
	    $stmt = $pdo->prepare(DbUtils::substTableAlias($sql));
	    $stmt->execute();
	    $this->getPrintJobOverview($pdo);
	}
	
	function batchReceiptPrintJob($start,$end) {
	    try {
		$start = intval($start);
		$end = intval($end);
	    } catch (Exception $ex) {
		echo json_encode(array("status" => "ERROR", "code" => NUMBERFORMAT_ERROR, "msg" => NUMBERFORMAT_ERROR_MSG));
		return;
	    }
	    if(!($this->userrights->hasCurrentUserRight('right_bill'))) {
		echo json_encode(array("status" => "ERROR", "code" => ERROR_BILL_NOT_AUTHOTRIZED, "msg" => ERROR_BILL_NOT_AUTHOTRIZED_MSG));
	    } else {
		if ($start > $end) {
		    $tmp = $end;
		    $end = $start;
		    $start = $tmp;
		}
		if(session_id() == '') {
		    session_start();
		}
		$printer = $_SESSION['receiptprinter'];
		$pdo = DbUtils::openDbAndReturnPdoStatic();
		
		for($jobId=$start;$jobId <= $end;$jobId++) {
		    $sql = "SELECT count(id) as countid FROM %bill% WHERE id=?";
		    $stmt = $pdo->prepare(DbUtils::substTableAlias($sql));
		    $stmt->execute(array($jobId));
		    $row =$stmt->fetchObject();
		    if ($row->countid == 1) {
			$printInsertSql = "INSERT INTO `%printjobs%` (`id` , `content`,`type`,`printer`) VALUES ( NULL,?,?,?)";
			$stmt = $pdo->prepare(DbUtils::substTableAlias($printInsertSql));
			$stmt->execute(array($jobId,'3',$printer));
		    }
		}
		echo json_encode(array("status" => "OK"));
	    }
	}
	
	function deleteSpooledPrintJob($printjobid) {
		if (!($this->userrights->hasCurrentUserRight('right_manager')) &&
				!($this->userrights->hasCurrentUserRight('is_admin'))
		) {
			echo "Benutzerrechte nicht ausreichend!";
			return false;
		}
		
		$pdo = DbUtils::openDbAndReturnPdoStatic();
		$sql = "DELETE FROM %printjobs% WHERE id=?";
		CommonUtils::execSql($pdo, $sql, array($printjobid));
		echo json_encode(array("status" => "OK"));
	}
	
	function queueReceiptPrintJob($billid,$useaddrecprinter) {
		// waiter, or manager, bill, admin rights required
		if (!($this->userrights->hasCurrentUserRight('right_paydesk')) &&
				!($this->userrights->hasCurrentUserRight('right_manager')) &&
				!($this->userrights->hasCurrentUserRight('right_bill')) &&
				!($this->userrights->hasCurrentUserRight('right_waiter')) &&
				!($this->userrights->hasCurrentUserRight('is_admin'))
		) {
			echo "Benutzerrechte nicht ausreichend!";
			return false;
		} else {
			// PAY_PRINT_TYPE = 3 means printing as paydesk print -> choose the printer
			// (print type is misused also for selection of printer)
			if(session_id() == '') {
				session_start();
			}
			$printer = $_SESSION['receiptprinter'];
			
			// now get receipt info from bill table
			$pdo = $this->dbutils->openDbAndReturnPdo();
			
			CommonUtils::log($pdo, "PRINTQUEUE", "Insert bill with id=$billid for printer=$printer into queue.");
			
			$sql = "SELECT setting FROM %config% WHERE name=?";
			$stmt = $pdo->prepare(DbUtils::substTableAlias($sql));
			$stmt->execute(array("addreceipttoprinter"));
			$row = $stmt->fetchObject();
			$addprinter = $row->setting;
			
			$printInsertSql = "INSERT INTO `%printjobs%` (`id` , `content`,`type`,`printer`) VALUES ( NULL,?,?,?)";
			$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($printInsertSql));
			$stmt->execute(array((string)($billid),'3',$printer));

			if (!is_null($addprinter) && ($addprinter != "") && ($useaddrecprinter == 1)) {
			    $stmt->execute(array((string)($billid),'3',$addprinter));
			}
			
			echo json_encode("OK");
		}
	}
	
	public function queueClosingSummary($closingid) {
		if (!($this->userrights->hasCurrentUserRight('right_paydesk')) &&
				!($this->userrights->hasCurrentUserRight('right_manager')) &&
				!($this->userrights->hasCurrentUserRight('right_bill')) &&
				!($this->userrights->hasCurrentUserRight('right_closing')) &&
				!($this->userrights->hasCurrentUserRight('right_waiter')) &&
				!($this->userrights->hasCurrentUserRight('is_admin'))
		) {
			echo "Benutzerrechte nicht ausreichend!";
			return false;
		} else {
			if(session_id() == '') {
				session_start();
			}
			$printer = $_SESSION['receiptprinter'];
			
			$pdo = $this->dbutils->openDbAndReturnPdo();
			
			CommonUtils::log($pdo, "PRINTQUEUE", "Insert closing with id=$closingid for printer=$printer into queue.");
			
			$printInsertSql = "INSERT INTO `%printjobs%` (`id` , `content`,`type`,`printer`) VALUES ( NULL,?,?,?)";
			$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($printInsertSql));
			$stmt->execute(array((string)($closingid),'4',$printer));
			echo json_encode("OK");
		}
	}
	
	function getBigFontWorkReceiptSetting($pdo) {
		$sql = "SELECT setting FROM %config% WHERE name=?";
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute(array("bigfontworkreceipt"));
		$row =$stmt->fetchObject();
		return $row->setting;
	}
	
	function isPasswordCorrect($pdo,$pass,$verbose) {
		if (is_null($pdo)) {
		    $pdo = DbUtils::openDbAndReturnPdoStatic();
		}
		$sql = "SELECT setting FROM %config% WHERE name=?";
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute(array("printpass"));
		$row =$stmt->fetchObject();

		if ($row != null) {
			$passInDb = $row->setting;
			if ($passInDb != null) {
				// plain comparison
				if ($pass == $passInDb) {
					return true;
				} else {
					if ($verbose) {
						echo "Error: Falscher Printpass!";
					}
				}
			} else {
				if ($verbose) {
					echo "Error: kein Printpass in DB gesetzt!";
				}
			}
		}
		if ($verbose) {
			echo "Error: DB konnte nicht abgefragt werden!";
		}
		return false;
	}
	

	function getLogoAsPng() {
		$pdo = $this->dbutils->openDbAndReturnPdo();
		
		header("Content-Disposition: attachment; filename=logo.png");
		header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
		header("Pragma: no-cache");
		header("Expires: Mon, 20 Dec 1998 01:00:00 GMT" );
		header('Content-Type: ' . image_type_to_mime_type(IMAGETYPE_PNG));

		$sql = "SELECT setting from %logo% WHERE name=?";
		
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute(array('logoimg'));
		$row = $stmt->fetchObject();

		if ($stmt->rowCount() > 0) {
			$img = $row->setting;
			$php_img = imagecreatefromstring($img);
			imagepng($php_img, NULL);
			imagedestroy($php_img);
		}
	}
	
	function getLogoAsWbmp() {
		$pdo = $this->dbutils->openDbAndReturnPdo();
		$genInfo = $this->admin->getGeneralConfigItems(false,$pdo);
	
		header("Content-Disposition: attachment; filename=logo.wbmp");
		header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
		header("Pragma: no-cache");
		header("Expires: Mon, 20 Dec 1998 01:00:00 GMT" );
		header('Content-Type: ' . image_type_to_mime_type(IMAGETYPE_WBMP));
	
		$logourl = $genInfo["logourl"];
		$img = file_get_contents("../" . $logourl);
		$php_img = imagecreatefromstring($img);
		
		$foreground_color = imagecolorallocate($im, 255, 0, 0);
		imagewbmp($php_img, NULL, $foreground_color);

		imagedestroy($php_img);
	}
	
	function getReceiptConfig() {
		$pdo = $this->dbutils->openDbAndReturnPdo();
		$genInfo = $this->admin->getGeneralConfigItems(false,$pdo);
		
		$retArray = array("decpoint" => $genInfo["decpoint"],
				"billlanguage" => $genInfo["billlanguage"],
				"version" => $genInfo["version"],
				"currency" => $genInfo["currency"],
				"companyinfo" => $genInfo["companyinfo"]
		);
		
		echo json_encode($retArray);
	}
	
	function getNextClosingPrintJobs($md5pass,$language,$fl=0) {
		$pdo = $this->dbutils->openDbAndReturnPdo();	    
		$isCorrect = $this->isPasswordCorrect($pdo,$md5pass,false);
		if ($isCorrect) {
			ob_start();
			
			$this->saveLastPrintServerAccess($pdo);
			
			$closing = new Closing();
			$sql = "SELECT id,content,type,printer FROM %printjobs% WHERE type=? ORDER BY id";
				
			$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
			$stmt->execute(array(4));
				
			$result = $stmt->fetchAll();
			$closingarray = array();
			foreach($result as $aClos) {
				$jobid = $aClos['id'];
				$closid = $aClos["content"];
				$printer = $aClos["printer"];
				$theClosing = $closing->getClosingSummaryWoSign($closid, $pdo, false,$fl);
				$aClosing = array("id" => $jobid,"closing" => $theClosing, "printer" => $printer);
				$closingarray[] = $aClosing;
			}
			echo json_encode($closingarray);
			ob_end_flush();
		} else {
			echo json_encode(array());
		}
	}
	
	function getTemplate($pdo,$templatekey) {
	    $sql = "SELECT setting FROM %config% WHERE name=?";
	    $stmt = $pdo->prepare(DbUtils::substTableAlias($sql));
	    $stmt->execute(array($templatekey));
	    $row =$stmt->fetchObject();
	    return $row->setting;
	}
	
	function getLastLog ($md5pass) {
	    $pdo = DbUtils::openDbAndReturnPdoStatic();
	    $isCorrect = $this->isPasswordCorrect($pdo,$md5pass,false);
	    if ($isCorrect || true) {
		echo json_encode(CommonUtils::getLastLog($pdo));
	    } else {
		echo json_encode("Log file from server unavaible due to wrong printcode");
	    }
	}
	
	function getNextReceiptPrintJobs($md5pass,$language,$printers,$fl) {
		$pdo = $this->dbutils->openDbAndReturnPdo();
		$isCorrect = $this->isPasswordCorrect($pdo,$md5pass,false);
		if ($isCorrect) {
			CommonUtils::log($pdo,"PRINTQUEUE", "getReceipts: p=$printers, fl=$fl");
			ob_start();
			$printersArr = explode ( ',', $printers );
			
			$this->saveLastPrintServerAccess($pdo);
			
			$template = $this->getTemplate($pdo, "rectemplate");
			
			if (intval($language) > 2) {
				$genInfo = $this->admin->getGeneralConfigItems(false,$pdo);
				$language = $genInfo["billlanguage"];
			}

			$bill = new Bill();
			
			$sql = "SELECT id,content,type,printer FROM %printjobs% WHERE type=? ORDER BY id";
			
			$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
			$stmt->execute(array(3));
			
			$result = $stmt->fetchAll();
			
			CommonUtils::log($pdo,"PRINTQUEUE", "getNextReceiptPrintJobs: retrieve " . count($result) . " jobs");
			
			$billarray = array();
			foreach($result as $aBill) {
				$printJobId = $aBill['id'];
				$aBillId = $aBill["content"];
				$printer = $aBill["printer"];
				CommonUtils::log($pdo,"PRINTQUEUE", "getNextReceiptPrintJobs: collect bill with id=$aBillId for printer=$printer");
				
				if (in_array($printer, $printersArr)) {
					if (is_null($fl)) {
						$receiptJob = array("id" => $printJobId,"bill" => $bill->getBillWithId($pdo,$aBillId,$language,$printer));
					} else if ($fl >= 4) {
						$receiptJob = array("id" => $printJobId,"bill" => $bill->getBillWithId($pdo,$aBillId,$language,$printer,true), "template" => $template);
					} else if ($fl >= 1) {
						$receiptJob = array("id" => $printJobId,"bill" => $bill->getBillWithId($pdo,$aBillId,$language,$printer), "template" => $template);
					}
					$billarray[] = $receiptJob;
				}
			}
			echo json_encode($billarray);
			ob_end_flush();
			CommonUtils::log($pdo,"PRINTQUEUE", "getNextReceiptPrintJobs: sent data to caller");
		} else {
			CommonUtils::log($pdo,"PRINTQUEUE", "getNextReceiptPrintJobs: Wrong printcode");
			echo json_encode(array());
		}
	}
	
	function getNextFoodWorkPrintJobs($printer,$md5pass,$fl) {
		$this->getNextWorkPrintJobs($md5pass,1,$printer,$fl);
	}
	
	function getNextDrinkWorkPrintJobs($printer,$md5pass,$fl) {
		$this->getNextWorkPrintJobs($md5pass,2,$printer,$fl);
	}
	
	function getNextWorkPrintJobs($md5pass,$theType,$printer,$fl) {
		$pdo = $this->dbutils->openDbAndReturnPdo();
		$isCorrect = $this->isPasswordCorrect($pdo,$md5pass,false);

		if ($isCorrect) {
			CommonUtils::log($pdo,"PRINTQUEUE", "getNextWorkPrintJobs: type = $theType, printer = $printer, fl= $fl");
			$this->saveLastPrintServerAccess($pdo);
			
			$bigFontWorkReceipt = $this->getBigFontWorkReceiptSetting($pdo);
			$templatekey = "foodtemplate";
			if ($theType === 2) {
			    $templatekey = "drinktemplate";
			}
			$template = $this->getTemplate($pdo, $templatekey);
			
			if (is_null($printer)) {
				$sql = "SELECT id,content,type FROM %printjobs% WHERE type=? ORDER BY id";
				$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
				$stmt->execute(array($theType));
			} else {
				$sql = "SELECT id,content,type FROM %printjobs% WHERE type=? AND printer=? ORDER BY id";
				$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
				$stmt->execute(array($theType,$printer));
			}
			
			$result = $stmt->fetchAll();
			CommonUtils::log($pdo,"PRINTQUEUE", "getNextWorkPrintJobs: retrieve " . count($result) . " jobs");
				
			$workarray = array();
			foreach($result as $aWorkJob) {
				$aWork = (array) json_decode($aWorkJob["content"]); // is in json format
				CommonUtils::log($pdo,"PRINTQUEUE", "getNextWorkPrintJobs: collect work receipt with id=" . $aWorkJob["id"] . " for printer=$printer");
				if ($fl < 5) {
					// if not fl 5 is reached than remove the price from the content
					$prods = (array) ($aWork["products"]);
					$targetProds = array();
					foreach ($prods as $aProd) {
						$theArrProd = (array) $aProd;
						
						$newTargetProd = array("id" => $theArrProd["id"],
						    "longname" => $theArrProd["longname"],
						    "option" => $theArrProd["option"],
						    "extras" => $theArrProd["extras"],
						    "ordertime" => $theArrProd["ordertime"],
						    "kind" => $theArrProd["kind"],
						    "printer" => $theArrProd["printer"],
						    );
						$targetProds[] = $newTargetProd;
					}
					$aWork["products"] = $targetProds;
				}
				if ($fl >= 2) {
				    $workarray[] = array("id" => $aWorkJob["id"],"content" => $aWork, "bigfontworkreceipt" => intval($bigFontWorkReceipt), "template" => $template);
				} else {
				    // default without template
				    $workarray[] = array("id" => $aWorkJob["id"],"content" => $aWork, "bigfontworkreceipt" => intval($bigFontWorkReceipt));
				}
			}
			CommonUtils::log($pdo,"PRINTQUEUE", "getNextWorkPrintJobs: sent data to caller");
			echo json_encode($workarray);
		} else {
			CommonUtils::log($pdo,"PRINTQUEUE", "getNextWorkPrintJobs: wrong printcode");
			echo json_encode(array());
		}
	}
	
	
	function deletePrintJob($pass,$id) {
		$pdo = $this->dbutils->openDbAndReturnPdo();
		$isCorrect = $this->isPasswordCorrect($pdo,$pass,false);
		if ($isCorrect) {
			$pdo = $this->dbutils->openDbAndReturnPdo();
			$this->saveLastPrintServerAccess($pdo);
			$sql = "DELETE FROM %printjobs% WHERE id=?";
			
			$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
			$stmt->execute(array($id));
			echo json_encode(array("status" => "OK", "code" => OK, "msg" => "Druckauftrag erfolgreich gelöscht."));
		} else {
			CommonUtils::log($pdo,"PRINTQUEUE", "deletePrintJob: wrong printcode");
			echo json_encode(array("status" => "ERROR", "code" => ERROR_NOT_AUTHOTRIZED, "msg" => ERROR_NOT_AUTHOTRIZED_MSG));
		}
	}
}
?>