<?php
// Datenbank-Verbindungsparameter
require_once ('dbutils.php');
require_once ('commonutils.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']) {
				// no user logged in
				return false;
			}
		}
		
		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 == 'showAllTablesOfRoom') {
			$this->showAllTablesOfRoom();
		} else if ($command == 'getRoomfield') {
			$this->getRoomfield();
		} else if ($command == 'setRoomInfo') {
			if ($this->hasCurrentUserAdminRights()) {
				$this->setRoomInfo($_POST['rooms']);
			}
		}
	}
	
	private function hasCurrentUserAdminRights() {
		if(session_id() == '') {
			session_start();
		}
		if (!isset($_SESSION['angemeldet']) || !$_SESSION['angemeldet']) {
			// no user logged in
			return false;
		} else {
			return ($_SESSION['is_admin']);
		}
	}
	
	function showAllRooms() {
		$roomtables = $this->getAllTablesAndRooms();
		echo json_encode($roomtables);
	}
	
	function getUnpaidTables($roomid) {
		// first get all tables of that rooms
		$tablesSql = "SELECT id,tableno FROM %resttables% WHERE %resttables%.roomid =? AND removed is null";
		$pdo = $this->dbutils->openDbAndReturnPdo();
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($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 <> '1'
			AND ordertime is not null";
			
			$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($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"], "sum" => $sumprice);
					$tableresult[] = $aTableEntry;
				}
			}
		}
		echo json_encode($tableresult);
	}
	
	function showAllRoomsAndTablesWithUnpaidItems() {
		$roomtables = $this->getAllTablesAndRooms();
		for ($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 copied from getJsonProductsOfTableToPay
		$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 <> '1'
		AND ordertime is not null
		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() {
		$sql = "SELECT id,roomname FROM %room% WHERE removed is null";
		$pdo = $this->dbutils->openDbAndReturnPdo();
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute();
		$result = $stmt->fetchAll();
		$roomArr = array();
		
		foreach($result as $row) {
			$roomEntry = array("id" => $row['id'], "name" => $row['roomname']);
			$roomArr[] = $roomEntry;
		}
		echo json_encode($roomArr);
	}
	
	// Part of chain to choose a product , here we start with chosing a room
	private function getAllTablesAndRooms()
	{
		$sql = "SELECT id,roomname FROM %room% WHERE removed is null";
		$dbresult = $this->dbutils->performSqlCommand($sql);
				
		$arrayOfRooms = array();
		while ($zeile = mysqli_fetch_array( $dbresult, MYSQL_ASSOC)) {
			$roomid = $zeile['id'];
			
			
			// now find the tables that are in that room
			$tablesArray = array();
			$tablesSql = "SELECT id,tableno FROM %resttables% WHERE %resttables%.roomid ='$roomid' AND removed is null";
			$dbresulttables = $this->dbutils->performSqlCommand($tablesSql);
			while ($table_entry = mysqli_fetch_array( $dbresulttables, MYSQL_ASSOC)) {
				$tableArrayEntry = array("id" => $table_entry['id'], "name" => $table_entry['tableno']);
				$tablesArray[] = $tableArrayEntry;
			}
			mysqli_free_result($dbresulttables);
			$aRoomEntry = array ("id" => $roomid, "name" => $zeile['roomname'], "tables" => $tablesArray);
			
			$arrayOfRooms[] = $aRoomEntry;
		}
		mysqli_free_result( $dbresult );
		return $arrayOfRooms;
	}

	
	// Part of chain to choose a product, here we know the room and show all tables there
	function showAllTablesOfRoom()
	{
		// Parameter for this method
		$roomid = $_GET['roomid'];
		
		// Find name of room to display in table header
		$sql = "SELECT id,roomname FROM %room% WHERE id='$roomid' AND removed is null";
		$dbresult = $this->dbutils->performSqlCommand($sql);
		$zeile = mysqli_fetch_array( $dbresult, MYSQL_ASSOC);
		$roomid = $zeile['id'];
		$roomname = $zeile['roomname'];
		mysqli_free_result( $dbresult );
		
		// Navigation table - home - back
		echo '<table class=navitable>';
		echo '<tr>';
		echo '<td><input type="image" src="img/home.png" onclick="showAllRooms();" />';
		echo '<td>' . $roomname;
		echo '</tr></table>';
		
		$nextFunction = $_GET['nextfunction'];
		
		$sql = "SELECT id,tableno FROM " . DB_RESTTABLES_TABLE . " WHERE roomid=" . $roomid;
		$dbresult = $this->dbutils->performSqlCommand($sql);
	
		
		// create a table that is optimal (sqrt-like size)
		$numberOfIcons = mysqli_num_rows($dbresult);
		$arrayOfButtons = array();
		while ($zeile = mysqli_fetch_array( $dbresult, MYSQL_ASSOC)) {
			$roomid = $zeile['id'];
				
			$onClickMethod = $nextFunction . '(' . $zeile['id'] . ',' . $roomid . ');';
			$aButtonEntry = array ("textOfButton" => $zeile['tableno'],
					"onClickMethod" => $onClickMethod);
			$arrayOfButtons[] = $aButtonEntry;
				
		}
		mysqli_free_result( $dbresult );
		$commonUtils = new CommonUtils();
		$commonUtils->createGridTableWithSqrtSizeOfButtons($arrayOfButtons);
	}
	
	function setRoomInfo($rooms) {
		$pdo = $this->dbutils->openDbAndReturnPdo();
		$pdo->beginTransaction();
		
		// clear room table
		$sql = "UPDATE %room% SET removed=?";
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute(array('1'));
		
		// clear resttables table
		$sql = "UPDATE %resttables% SET removed=?";
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute(array('1'));
		
		$noOfRooms = count($rooms);
		for ($roomindex = 0;$roomindex < $noOfRooms; $roomindex++) {
			$aRoom = $rooms[$roomindex];
			$aRoomName = $aRoom[0];
			
			$sql = "INSERT INTO `%room%` (`id`, `roomname`) VALUES (NULL,?)";
			$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
			$stmt->execute(array($aRoomName));
			$roomId = $pdo->lastInsertId();
			
			$tablesArr = $aRoom[1];
			
			$noOfTables = count($tablesArr);
			for ($tableindex = 0; $tableindex < $noOfTables; $tableindex++) {
				$aTableName = $tablesArr[$tableindex];
				$sql = "INSERT INTO `%resttables%` (`id` , `tableno`, `roomid`) VALUES (NULL ,?,?)";
				$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
				$stmt->execute(array($aTableName,$roomId));
			}
		}
		$pdo->commit();
		echo json_encode("OK");
	}
	
	function getRoomfield() {
		$pdo = $this->dbutils->openDbAndReturnPdo();
		
		$sql = "SELECT id,roomname FROM %room% WHERE removed is null ORDER BY 'sorting'";
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute();
		$result = $stmt->fetchAll();
		$numberOfRooms = $stmt->rowCount();
		
		$roomIdNameArray = array();
		
		$maxTables = 0;
		$roomArr = array();
		foreach($result as $row) {
			$roomid = $row['id'];
			$roomname = $row['roomname'];
			
			// now get the tables of this room
			$sql = "SELECT id,tableno FROM %resttables% WHERE roomid=? AND removed is null 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']);
			}
			$roomArr[] = array("roomid" => $roomid, "roomname" => $roomname, "tables" => $tableArr, "noOfTables" => $numberOfTables);
		}
		echo json_encode(array("noOfRooms" => $numberOfRooms, "maxTables" => $maxTables, "roomfield" => $roomArr));
	}
}

?>