<?php
error_reporting(E_ALL);

class Installer {
	private function checkwriteaccessconfigfolder() {
		return (is_writable("../php"));
	}
	
	private function checkwriteaccessconfigfile() {
		if (file_exists("../php/config.php")) {
			return (is_writable("../php/config.php"));
		} else {
			return (is_writable("../php"));
		}
	}
	
	private function checkwritecustomerfolder() {
		return (is_writable("../customer"));
	}
	
	private function checkwritespeisekarte() {
		if (file_exists("../customer/speisekarte.txt")) {
			return (is_writable("../customer/speisekarte.txt"));
		} else {
			return (is_writable("../customer"));
		}
	}

	function checkWriteAccess() {		
		$retArray = array(
				"configfolder" => $this->checkwriteaccessconfigfolder(),
				"configfile" => $this->checkwriteaccessconfigfile(),
				"customerfolder" => $this->checkwritecustomerfolder(),
				"speisekarte" => $this->checkwritespeisekarte()
		);
		echo json_encode($retArray);
	}
}

class ConfigWriter {
	function getConfigVals() {
		if (is_readable("../php/config.php")) {
			include( "../php/config.php" );
			$retArray = array(
					"host" => MYSQL_HOST,
					"db" => MYSQL_DB,
					"user" => MYSQL_USER,
					"password" => MYSQL_PASSWORD,
					"tabprefix" => TAB_PREFIX);
			echo json_encode(array("status" => "OK","result" => $retArray));
		} else {
			echo json_encode(array("status" => "Failed"));
		}
	}
}


class Admin {
	var $prefix = "";
	var $pdo;
	
	function setPrefix($pre) {
		$this->prefix = $pre;
	}
	
	function setPdo($pdo) {
		$this->pdo = $pdo;
	}
	
	function openDbAndReturnPdo ($host,$db,$user,$password) {
		$dsn = 'mysql:host=' . $host . ';dbname=' . $db;
		$pdo = null;
		try {
			$pdo = new PDO($dsn, $user, $password);
			$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
		}
		catch (PDOException $e) {
			echo 'Verbindungsproblem: ' . $e->getMessage();
			$pdo = null;
		}
		return $pdo;
	}
	
	function createTables()
	{
		$pdo = $this->pdo;
			
		$this->doSQLcatch($pdo, "DROP TABLE `%hist%`");
		$this->doSQLcatch($pdo, "DROP TABLE `%histprod%`");
		$this->doSQLcatch($pdo, "DROP TABLE `%histconfig%`");
		$this->doSQLcatch($pdo, "DROP TABLE `%histuser%`");
		$this->doSQLcatch($pdo, "DROP TABLE `%histactions%`");
		
		$this->doSQLcatch($pdo, "drop TABLE `%billproducts%`");
		$this->doSQLcatch($pdo, "drop TABLE `%queue%`");
		$this->doSQLcatch($pdo, "drop TABLE `%printjobs%`");
		$this->doSQLcatch($pdo, "drop TABLE `%bill%`");
		$this->doSQLcatch($pdo, "drop TABLE `%user%`");
		$this->doSQLcatch($pdo, "drop TABLE `%closing%`");
		$this->doSQLcatch($pdo, "drop TABLE `%config%`");
		$this->doSQLcatch($pdo, "drop TABLE `%products%`");
		$this->doSQLcatch($pdo, "drop TABLE `%prodtype%`");
		$this->doSQLcatch($pdo, "drop TABLE `%pricelevel%`");
		$this->doSQLcatch($pdo, "drop TABLE `%resttables%`");
		$this->doSQLcatch($pdo, "drop TABLE `%room%`");
		$this->doSQLcatch($pdo, "drop TABLE `%payment%`");

		$this->createPaymentTable($pdo);
		$this->createUserTable($pdo);
		$this->createRoomTable($pdo);
		$this->createRestTables($pdo);
		$this->createConfigTable($pdo);
		$this->createProdTypeTable($pdo);
		$this->createProductTable($pdo);
		$this->createPriceLevelTable($pdo);
		$this->createClosingTable($pdo);
		$this->createBillTable($pdo);
		$this->createQueueTable($pdo);
		$this->createBillProductsTable($pdo);
		$this->createHistTables($pdo);
		$this->createPrintJobsTable($pdo);

		$this->doSQL($pdo,"INSERT INTO `%pricelevel%` (`id` , `name`,`info`) VALUES ('1', 'A', 'Normale Preisstufe')");
		$this->doSQL($pdo,"INSERT INTO `%pricelevel%` (`id` , `name`,`info`) VALUES ('2', 'B', 'Wochenendtarif')");
		$this->doSQL($pdo,"INSERT INTO `%pricelevel%` (`id` , `name`,`info`) VALUES ('3', 'C', 'Happy Hour')");
		
		$this->doSQL($pdo,"INSERT INTO `%config%` (`id` , `name`, `setting`) VALUES (NULL , 'pricelevel', '1')");
		$this->doSQL($pdo,"INSERT INTO `%config%` (`id` , `name`, `setting`) VALUES (NULL , 'tax', '19,0')");
		$this->doSQL($pdo,"INSERT INTO `%config%` (`id` , `name`, `setting`) VALUES (NULL , 'togotax', '7,0')");
		$this->doSQL($pdo,"INSERT INTO `%config%` (`id` , `name`, `setting`) VALUES (NULL , 'stornocode', '123')");
		$this->doSQL($pdo,"INSERT INTO `%config%` (`id` , `name`, `setting`) VALUES (NULL , 'printpass', 'printen')");
		$this->doSQL($pdo,"INSERT INTO `%config%` (`id` , `name`, `setting`) VALUES (NULL , 'companyinfo', 'Musterrestaurant\nBeispielstrasse 123\n12345 Musterort')");
		$this->doSQL($pdo,"INSERT INTO `%config%` (`id` , `name`, `setting`) VALUES (NULL , 'serverurl', '')");
		$this->doSQL($pdo,"INSERT INTO `%config%` (`id` , `name`, `setting`) VALUES (NULL , 'email', '')");
		$this->doSQL($pdo,"INSERT INTO `%config%` (`id` , `name`, `setting`) VALUES (NULL , 'logourl', 'customer/logo.png')");
		$this->doSQL($pdo,"INSERT INTO `%config%` (`id` , `name`, `setting`) VALUES (NULL , 'payprinttype', 'l')");
		$this->doSQL($pdo,"INSERT INTO `%config%` (`id` , `name`, `setting`) VALUES (NULL , 'version', '1.0')");
		
		$this->readConfigTableAndSendToHist($pdo);
		
		return;
	}
	
	function doSQL($pdo,$sql) {
		$stmt = $pdo->prepare($this->resolveTablenamesInSqlString($sql));
		$stmt->execute();
	}
	
	function doSQLcatch($pdo,$sql) {
		try {
			$stmt = $pdo->prepare($this->resolveTablenamesInSqlString($sql));
			$stmt->execute();
		} catch (Exception $e) {
			// nothing - table not present or whatever...
		}
	}
	
	function readConfigTableAndSendToHist($pdo) {
		$sql_query = "SELECT * FROM %config%";
	
		$sql_insert_histconfig = "INSERT INTO %histconfig% (id,configid,setting) VALUES (
		NULL,?,?)";
	
		$stmt_query = $pdo->prepare($this->resolveTablenamesInSqlString($sql_query));
		$stmt_insert_histconfig = $pdo->prepare($this->resolveTablenamesInSqlString($sql_insert_histconfig));
	
		$stmt_query->execute();
		$result = $stmt_query->fetchAll();
		foreach($result as $row){
			$stmt_insert_histconfig->execute(array($row['id'],$row['setting']));
			$newRefIdForHist = $pdo->lastInsertId();
			$this->insertIntoHist($pdo, '2', $newRefIdForHist);			
		}
	}
	
	private function insertIntoHist($pdo,$action,$refIdForHist) {
		date_default_timezone_set('Europe/Berlin');
		$currentTime = date('Y-m-d H:i:s');
	
		$sql_insert_hist = "INSERT INTO %hist% (id,date,action,refid) VALUES (NULL,?,?,?)";
		$stmt_insert_hist = $pdo->prepare($this->resolveTablenamesInSqlString($sql_insert_hist));
		$stmt_insert_hist->execute(array($currentTime, $action, $refIdForHist));
	}
	
	function insertAdminUser($adminpass) {
		$md5adminpass = md5($adminpass);
		$pdo = $this->pdo;
		
		$userInsertSql = "INSERT INTO `%user%` (`id` , `username` , `userpassword`, `is_admin`, `right_waiter`,`right_kitchen`,`right_bar`,`right_supply`,`right_paydesk`,`right_statistics`,`right_bill`,`right_products`,`right_manager`,`active`) VALUES (NULL,?,?,?,?,?,?,?,?,?,?,?,?,'1')";
		$stmt = $pdo->prepare($this->resolveTablenamesInSqlString($userInsertSql));
		$stmt->execute(array('admin',$md5adminpass,1,0,0,0,0,0,0,0,0,1));
		$newUserIdForHist = $pdo->lastInsertId();

		// now insert into hist
		$sql_insert_histuser = "INSERT INTO %histuser% (`id` , `userid`, `username` ,
		`is_admin`, `right_waiter`,`right_kitchen`,`right_bar`,`right_supply`,`right_paydesk`,
		`right_statistics`,`right_bill`,`right_products`,`right_manager`,`active`) VALUES (
		NULL,?,?,?,?,?,?,?,?,?,?,?,?,?)";
		$stmt_insert_histuser = $pdo->prepare($this->resolveTablenamesInSqlString($sql_insert_histuser));
		$stmt_insert_histuser->execute(array($newUserIdForHist,'admin',1,0,0,0,0,0,0,0,0,1,1));
		$newRefIdForHist = $pdo->lastInsertId();
		$this->insertIntoHist($pdo, '3', $newRefIdForHist);
	}
	
	function createBillProductsTable($pdo) {
		$sql = "
		CREATE TABLE `%billproducts%` (
		`queueid` INT( 10 ) NOT NULL,
		`billid` INT(10) NOT NULL,
		FOREIGN KEY (queueid) REFERENCES %queue%(id),
		FOREIGN KEY (billid) REFERENCES %bill%(id)
		) ENGINE = InnoDb ;
		";
		$this->doSQL($pdo,$sql);
	}
	
	/*
	 * Create the queue table:
	* 	action: P=Pay, S=Storno
	*/
	function createQueueTable($pdo)
	{
		$sql = "
		CREATE TABLE `%queue%` (
		`id` INT( 10 ) NOT NULL AUTO_INCREMENT PRIMARY KEY ,
		`tablenr` INT( 3 ) NOT NULL ,
		`productid` INT( 10 ) NULL ,
		`pricelevel` INT( 3 ) NOT NULL ,
		`price` DECIMAL (5,2) NOT NULL,
		`productname` VARCHAR( 150 ) NULL,
		`ordertime` DATETIME NULL ,
		`anoption` VARCHAR( 150 ) NULL ,
		`readytime` DATETIME NOT NULL,
		`delivertime` DATETIME NULL,
		`payinprogress` INT(3) NOT NULL,
		`paidtime` DATETIME NULL,
		`billid` INT(10),
		`toremove` INT(3) NOT NULL,
		`cooking` INT(10) NULL,
		`workprinted` INT(2) NOT NULL,
		`action` VARCHAR(3) NOT NULL,
		FOREIGN KEY (tablenr) REFERENCES %resttables%(id),
		FOREIGN KEY (pricelevel) REFERENCES %pricelevel%(id),
		FOREIGN KEY (productid) REFERENCES %products%(id),
		FOREIGN KEY (billid) REFERENCES %bill%(id),
		FOREIGN KEY (cooking) REFERENCES %user%(id)
		) ENGINE = InnoDb ;
		";
		$this->doSQL($pdo,$sql);
	}
	
	function createProdTypeTable($pdo)
	{
		$sql = "
		CREATE TABLE `%prodtype%` (
		`id` INT (10) NOT NULL AUTO_INCREMENT PRIMARY KEY ,
		`name` VARCHAR ( 150 ) NOT NULL,
		`usekitchen` INT(1) NOT NULL,
		`usesupplydesk` INT(1) NOT NULL,
		`kind` INT(2) NOT NULL,
		`sorting` INT(2) NULL,
		`reference` INT (10) NULL,
		`removed` INT(1) NULL,
		FOREIGN KEY (reference) REFERENCES %prodtype%(id)
		) ENGINE = InnoDb ;
		";
		$this->doSQL($pdo,$sql);
	}
	
	
	function createProductTable($pdo)
	{
		$sql = "
		CREATE TABLE `%products%` (
		`id` INT (10) NOT NULL AUTO_INCREMENT PRIMARY KEY ,
		`shortname` VARCHAR ( 150 ) NOT NULL,
		`longname` VARCHAR ( 150 ) NOT NULL,
		`priceA` DECIMAL (5,2) NULL,
		`priceB` DECIMAL (5,2) NULL,
		`priceC` DECIMAL (5,2) NULL,
		`category` INT(3) NULL,
		`sorting` INT(2) NULL,
		`available` INT(2) NOT NULL,
		`audio` VARCHAR ( 150 ) NULL,
		`removed` INT(1) NULL,
		FOREIGN KEY (category) REFERENCES %prodtype%(id)
		) ENGINE = InnoDb ;
		";
		$this->doSQL($pdo,$sql);
	}
	
	
	function createUserTable($pdo)
	{
		$sql = "
		CREATE TABLE `%user%` (
		`id` INT (10) NOT NULL AUTO_INCREMENT PRIMARY KEY ,
		`username` VARCHAR ( 150 ) NOT NULL,
		`userpassword` VARCHAR ( 150 ) NOT NULL,
		`is_admin` INT (2) NOT NULL,
		`right_waiter` INT (2) NOT NULL,
		`right_kitchen` INT (2) NOT NULL,
		`right_bar` INT (2) NOT NULL,
		`right_supply` INT (2) NOT NULL,
		`right_paydesk` INT (2) NOT NULL,
		`right_statistics` INT (2) NOT NULL,
		`right_bill` INT (2) NOT NULL,
		`right_products` INT (2) NOT NULL,
		`right_manager` INT (2) NOT NULL,
		`lastmodule` VARCHAR ( 30 ) NULL,
		`ordervolume` INT (2) NULL,
		`active` INT (2) NOT NULL
		) ENGINE = InnoDb ;
		";
		$this->doSQL($pdo,$sql);
	}
	
	function createPaymentTable($pdo) {
		$sql = "
		CREATE TABLE `%payment%` (
		`id` INT (3) NOT NULL UNIQUE,
		`name` VARCHAR ( 20 ) NOT NULL
		) ENGINE = InnoDb
		";
		$stmt = $pdo->prepare($this->resolveTablenamesInSqlString($sql));
		$stmt->execute();
	
		$sql = "INSERT INTO %payment% (id,name) VALUES (?,?)";
		$stmt = $pdo->prepare($this->resolveTablenamesInSqlString($sql));
	
		$stmt->execute(array('1', 'Barzahlung'));
		$stmt = $pdo->prepare($this->resolveTablenamesInSqlString($sql));
		
		$stmt->execute(array('2', 'EC-Kartenzahlung'));
		$stmt = $pdo->prepare($this->resolveTablenamesInSqlString($sql));
		$stmt->execute(array('3', 'Kreditkartenzahlung'));
		$stmt = $pdo->prepare($this->resolveTablenamesInSqlString($sql));
		$stmt->execute(array('4', 'Rechnung'));
		$stmt = $pdo->prepare($this->resolveTablenamesInSqlString($sql));
		$stmt->execute(array('5', 'Ueberweisung'));
		$stmt = $pdo->prepare($this->resolveTablenamesInSqlString($sql));
		$stmt->execute(array('6', 'Lastschrift'));
	}
	
	function createHistTables($pdo) {
		$sql = "
		CREATE TABLE `%hist%` (
		`id` INT (10) NOT NULL AUTO_INCREMENT PRIMARY KEY ,
		`date` DATETIME NOT NULL ,
		`action` INT ( 2 ) NOT NULL,
		`refid` INT (10) NOT NULL
		) ENGINE = InnoDb
		";
		$this->doSQL($pdo,$sql);
	
		$sql = "
		CREATE TABLE `%histprod%` (
		`id` INT (10) NOT NULL AUTO_INCREMENT PRIMARY KEY ,
		`prodid` INT (10) NOT NULL,
		`shortname` VARCHAR ( 150 ) NOT NULL,
		`longname` VARCHAR ( 150 ) NOT NULL,
		`priceA` DECIMAL (5,2) NULL,
		`priceB` DECIMAL (5,2) NULL,
		`priceC` DECIMAL (5,2) NULL,
		`sorting` INT(2) NULL,
		`available` INT(2) NOT NULL,
		`audio` VARCHAR ( 150 ) NULL,
		FOREIGN KEY (prodid) REFERENCES %products%(id)
		) ENGINE = InnoDb
		";
		$this->doSQL($pdo,$sql);
	
		$sql = "
		CREATE TABLE `%histconfig%` (
		`id` INT (10) NOT NULL AUTO_INCREMENT PRIMARY KEY ,
		`configid` INT (10) ,
		`setting` VARCHAR ( 10000 ),
		FOREIGN KEY (configid) REFERENCES %config%(id)
		) ENGINE = InnoDb
		";
		$this->doSQL($pdo,$sql);
	
		$sql = "
		CREATE TABLE `%histuser%` (
		`id` INT (10) NOT NULL AUTO_INCREMENT PRIMARY KEY ,
		`userid` INT (10) ,
		`username` VARCHAR ( 150 ) NOT NULL,
		`is_admin` INT (2) NOT NULL,
		`right_waiter` INT (2) NOT NULL,
		`right_kitchen` INT (2) NOT NULL,
		`right_bar` INT (2) NOT NULL,
		`right_supply` INT (2) NOT NULL,
		`right_paydesk` INT (2) NOT NULL,
		`right_statistics` INT (2) NOT NULL,
		`right_bill` INT (2) NOT NULL,
		`right_products` INT (2) NOT NULL,
		`right_manager` INT (2) NOT NULL,
		`active` INT (2) NOT NULL,
		FOREIGN KEY (userid) REFERENCES %user%(id)
		) ENGINE = InnoDb
		";
		$this->doSQL($pdo,$sql);
	
		$sql = "
		CREATE TABLE `%histactions%` (
		`id` INT (3) NOT NULL,
		`name` VARCHAR ( 20 ) NOT NULL,
		`description` VARCHAR ( 150 ) NULL
		) ENGINE = InnoDb
		";
		$this->doSQL($pdo,$sql);
	
		$this->defineHistActions($pdo);
	}
	
	public function defineHistActions ($pdo) {
		$sql = "INSERT INTO %histactions% (id,name,description) VALUES (?,?,?)";
		$stmt = $pdo->prepare($this->resolveTablenamesInSqlString($sql));
	
		$stmt->execute(array('1', 'ProdInit', 'Initiales Befuellen der Produkttabelle'));
		$stmt->execute(array('2', 'ConfigInit', 'Initiales Befuellen der Konfigurationstabelle'));
		$stmt->execute(array('3', 'UserInit', 'Initiales Befuellen der Benutzertabelle'));
		$stmt->execute(array('4', 'ProdChange', 'Modifikation der Produktdaten'));
		$stmt->execute(array('5', 'ProdCreation', 'Neues Produkt'));
		$stmt->execute(array('6', 'ConfigChange', 'Modifikation der Konfiguration'));
		$stmt->execute(array('7', 'UserCreation', 'Neuer Benutzer'));
		$stmt->execute(array('8', 'UserChange', 'Modifikation eines Benutzers'));
	}
	
	function createRoomTable($pdo)
	{
		$sql = "
		CREATE TABLE `%room%` (
		`id` INT (10) NOT NULL AUTO_INCREMENT PRIMARY KEY ,
		`roomname` VARCHAR ( 150 ) NOT NULL,
		`removed` INT(2) NULL,
		`sorting` INT(2) NULL
		) ENGINE = InnoDb ;
		";
		$stmt = $pdo->prepare($this->resolveTablenamesInSqlString($sql));
		$stmt->execute();
	}
	
	function createRestTables($pdo)
	{
		$sql = "
		CREATE TABLE `%resttables%` (
		`id` INT (10) NOT NULL AUTO_INCREMENT PRIMARY KEY ,
		`tableno` VARCHAR ( 150 ) NOT NULL,
		`roomid` INT ( 10 ) NOT NULL,
		`removed` INT(2) NULL,
		`sorting` INT(2) NULL,
		FOREIGN KEY (roomid) REFERENCES %room%(id)
		) ENGINE = InnoDb ;
		";
		$stmt = $pdo->prepare($this->resolveTablenamesInSqlString($sql));
		$stmt->execute();
	
		$sql = "INSERT INTO `%room%` (`id`, `roomname`) VALUES (NULL,?)";
		$stmt = $pdo->prepare($this->resolveTablenamesInSqlString($sql));
		$stmt->execute(array('Raum 1'));
		$roomId = $pdo->lastInsertId();
	
		$sql = "INSERT INTO `%resttables%` (`id` , `tableno`, `roomid`) VALUES (NULL ,?,?)";
		$stmt = $pdo->prepare($this->resolveTablenamesInSqlString($sql));
		$stmt->execute(array('Tisch 1',$roomId));
		$stmt = $pdo->prepare($this->resolveTablenamesInSqlString($sql));
		$stmt->execute(array('Tisch 2',$roomId));
	}
	
	function createBillTable($pdo)
	{
		$sql = "
		CREATE TABLE `%bill%` (
		`id` INT (10) NOT NULL AUTO_INCREMENT PRIMARY KEY ,
		`billdate` DATETIME NOT NULL ,
		`content` VARCHAR ( 50000 ) ,
		`brutto` DECIMAL (5,2) NULL,
		`netto` DECIMAL (5,2) NULL,
		`tableid` VARCHAR ( 150 ) NOT NULL,
		`closingid` INT(4) NULL,
		`status` VARCHAR(2) NULL,
		`paymentid` INT(2) NULL,
		`userid` INT(3) NULL,
		`ref` INT(10) NULL,
		`tax` DECIMAL (5,2) NOT NULL,
		FOREIGN KEY (closingid) REFERENCES %closing%(id),
		FOREIGN KEY (paymentid) REFERENCES %payment%(id),
		FOREIGN KEY (userid) REFERENCES %user%(id),
		FOREIGN KEY (ref) REFERENCES %bill%(id)
		) ENGINE = InnoDb ;
		";
		$stmt = $pdo->prepare($this->resolveTablenamesInSqlString($sql));
		$stmt->execute();
	
		// insert dummy entry so that select query with closing works
		date_default_timezone_set('Europe/Berlin');
		$currentTime = date('Y-m-d H:i:s');
		$billInsertSql = "INSERT INTO `%bill%` (`id` , `billdate`,`content`,`brutto`,`tableid`,`paymentid`,`tax`) VALUES ( '0', '$currentTime' , '', '', '-1', NULL, '0.00')";
		$stmt = $pdo->prepare($this->resolveTablenamesInSqlString($billInsertSql));
		$stmt->execute();
	}
	
	function createPriceLevelTable($pdo) {
		$sql = "
		CREATE TABLE `%pricelevel%` (
		`id` INT (10) NOT NULL AUTO_INCREMENT PRIMARY KEY ,
		`name` VARCHAR ( 10000 ) ,
		`info` VARCHAR ( 10000 )
		) ENGINE = InnoDb ;
		";
		$stmt = $pdo->prepare($this->resolveTablenamesInSqlString($sql));
		$stmt->execute();
	}
	
	function createConfigTable($pdo) {
		$sql = "
		CREATE TABLE `%config%` (
		`id` INT (10) NOT NULL AUTO_INCREMENT PRIMARY KEY ,
		`name` VARCHAR ( 1000 ) ,
		`setting` VARCHAR ( 10000 )
		) ENGINE = InnoDb ;
		";
		$stmt = $pdo->prepare($this->resolveTablenamesInSqlString($sql));
		$stmt->execute();
	}
	
	function createClosingTable($pdo) {
		$sql = "
		CREATE TABLE `%closing%` (
		`id` INT (10) NOT NULL AUTO_INCREMENT PRIMARY KEY ,
		`closingdate` DATETIME NOT NULL ,
		`remark` VARCHAR ( 10000 )
		) ENGINE = InnoDb ;
		";
		$stmt = $pdo->prepare($this->resolveTablenamesInSqlString($sql));
		$stmt->execute();
	}
	
	function createPrintJobsTable($pdo) {
		$sql = "
		CREATE TABLE `%printjobs%` (
		`id` INT (10) NOT NULL AUTO_INCREMENT PRIMARY KEY ,
		`content` VARCHAR ( 50000 ) NOT NULL ,
		`type` INT (2) NOT NULL
		) ENGINE = InnoDb ;
		";
		$stmt = $pdo->prepare($this->resolveTablenamesInSqlString($sql));
		$stmt->execute();
	}
	
	function resolveTablenamesInSqlString($sqlString) {
		$out = str_replace("%queue%",$this->prefix . "queue",$sqlString);
		$out = str_replace("%products%",$this->prefix . "products",$out);
		$out = str_replace("%user%",$this->prefix . "user",$out);
		$out = str_replace("%room%",$this->prefix . "room",$out);
		$out = str_replace("%resttables%",$this->prefix . "resttables",$out);
		$out = str_replace("%bill%",$this->prefix . "bill",$out);
		$out = str_replace("%pricelevel%",$this->prefix . "pricelevel",$out);
		$out = str_replace("%config%",$this->prefix . "config",$out);
		$out = str_replace("%closing%",$this->prefix . "closing",$out);
		$out = str_replace("%printjobs%",$this->prefix . "printjob",$out);
		$out = str_replace("%hist%",$this->prefix . "hist",$out);
		$out = str_replace("%histprod%",$this->prefix . "histprod",$out);
		$out = str_replace("%histconfig%",$this->prefix . "histconfig",$out);
		$out = str_replace("%histuser%",$this->prefix . "histuser",$out);
		$out = str_replace("%histactions%",$this->prefix . "histactions",$out);
		$out = str_replace("%payment%",$this->prefix . "payment",$out);
		$out = str_replace("%billproducts%",$this->prefix . "billproducts",$out);
		return (str_replace("%prodtype%",$this->prefix . "prodtype",$out));
	}
	
	function testDbConnection($host,$dbname,$user,$pass) {
		$pdo = $this->openDbAndReturnPdo($host,$dbname,$user,$pass);
		if (!is_null($pdo)) {
			echo json_encode("OK");
		} else {
			echo json_encode("ERROR");
		}
	}
	
	function writeConfigFile($host,$db,$user,$password,$prefix) {
		$errorlevel = "<?php\nerror_reporting(E_ERROR);\n\n"; // development: E_ALL
		
		$hostlines = "// Zum Aufbau der Verbindung zur Datenbank\n";
		$hostlines .= "// die Daten erhalten Sie von Ihrem Provider\n";
		$hostlines .= "define ( 'MYSQL_HOST','$host' );";
		$userlines = "define ( 'MYSQL_USER',  '$user' );";
		$dbpasslines = "define ( 'MYSQL_PASSWORD',  '$password' );";
		$dblines = "define ( 'MYSQL_DB', '$db' );";
		$prefixlines = "define ('TAB_PREFIX', '$prefix');";
		$configText = "$errorlevel\n$hostlines\n$userlines\n$dbpasslines\n$dblines\n$prefixlines\n?>";
		file_put_contents("../php/config.php", $configText);
	}
}
$command = $_GET["command"];
if ($command == 'checkWriteAccess') {
	$checker = new Installer();
	$checker->checkWriteAccess();
} else if ($command == 'testDbConnection') {
	$admin = new Admin();
	try {
		if (isset($_POST['host']) && isset($_POST['dbname']) && isset($_POST['user']) && isset($_POST['pass'])) {
			$admin->testDbConnection($_POST['host'],$_POST['dbname'],$_POST['user'],$_POST['pass']);
		} else {
			echo json_encode("ERROR");
		}
	} catch (Exception $e) {
		echo json_encode("ERROR");
	}
} else if ($command == 'getConfig') {
	$configWriter = new ConfigWriter();
	$configWriter->getConfigVals();
} else if ($command == 'install') {
	$admin = new Admin();
	$pdo = $admin->openDbAndReturnPdo($_POST['host'],$_POST['db'],$_POST['user'],$_POST['password']);
	$admin->setPdo($pdo);
	$admin->setPrefix($_POST['prefix']);
	$admin->createTables();
	$admin->insertAdminUser($_POST['adminpass']);
	$admin->writeConfigFile($_POST['host'],$_POST['db'],$_POST['user'],$_POST['password'],$_POST['prefix']);
	echo json_encode("OK");
}
?>