<?php
require_once ('dbutils.php');
require_once ('utilities/Emailer.php');

class Reservation {
	var $dbutils;
	function __construct() {
		$this->dbutils = new DbUtils();
	}
	
	function handleCommand($command) {
		if (!$this->isUserAlreadyLoggedInForPhpAndMayReserve()) {
			echo json_encode(array("status" => "ERROR", "code" => ERROR_RES_NOT_AUTHOTRIZED, "msg" => ERROR_RES_NOT_AUTHOTRIZED_MSG));
		} else {
			if ($command == 'createReservation') {
				$this->createReservation($_POST['day'],$_POST['month'],$_POST['year'],$_POST['start'],$_POST['name'],$_POST['email'],$_POST['persons'],$_POST['duration'],$_POST['phone'],$_POST['remark']);
			} else if ($command == 'getReservations') {
				$this->getReservations($_GET['day'],$_GET['month'],$_GET['year']);
			} else if ($command == 'changeReservation') {
				$this->changeReservation($_POST['id'],$_POST['day'],$_POST['month'],$_POST['year'],$_POST['start'],$_POST['name'],$_POST['email'],$_POST['persons'],$_POST['duration'],$_POST['phone'],$_POST['remark']);
			} else if ($command == 'delReservation') {
				$this->delReservation($_POST['id']);
			} else if ($command == 'emailConfirmReservation') {
				$this->emailConfirmReservation($_POST['to'],$_POST['msg']);
			}
			else {
				echo "Kommando nicht unterstuetzt.";
			}
		}
	}
	
	function isUserAlreadyLoggedInForPhpAndMayReserve() {
		if(session_id() == '') {
			session_start();
		}
		if (!isset($_SESSION['angemeldet']) || !$_SESSION['angemeldet']) {
			return false;
		} else {
			return ($_SESSION['right_reservation']);
		}
	}
	
	private function createReservation($day,$month,$year,$start,$name,$email,$persons,$duration,$phone,$remark) {
		$userid = $_SESSION['userid'];
		date_default_timezone_set(DbUtils::getTimeZone());
		$currentTime = date('Y-m-d H:i:s');
		$scheduledDate = "$year-$month-$day 00:00:00";
		
		try {
			$pdo = $this->dbutils->openDbAndReturnPdo();
			$pdo->beginTransaction();
			
			$sql = "INSERT INTO `%reservations%` (
					`id` , `creator`,`creationdate`,`scheduledate`,`name`,`email`,`starttime`,`duration`,`persons`,`phone`,`remark`)
					VALUES (
					NULL , ?,?,?,?,?,?,?,?,?,?)";
			$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
			$stmt->execute(array($userid,$currentTime,$scheduledDate,$name,$email,$start,$duration,$persons,$phone,$remark));
			$pdo->commit();
			echo json_encode(array("status" => "OK"));
		}
		catch (PDOException $e) {
			$pdo->rollBack();
			echo json_encode(array("status" => "ERROR", "code" => ERROR_GENERAL_DB_NOT_READABLE, "msg" => ERROR_GENERAL_DB_NOT_READABLE_MSG));
		}
	}
	
	private function changeReservation($id,$day,$month,$year,$start,$name,$email,$persons,$duration,$phone,$remark) {
		$userid = $_SESSION['userid'];
		date_default_timezone_set(DbUtils::getTimeZone());
		$currentTime = date('Y-m-d H:i:s');
		$scheduledDate = "$year-$month-$day 00:00:00";
		
		try {
			$pdo = $this->dbutils->openDbAndReturnPdo();
			$pdo->beginTransaction();
				
			$sql = "UPDATE `%reservations%` SET creator=?,creationdate=?,scheduledate=?,name=?,email=?,starttime=?,duration=?,persons=?,phone=?,remark=? WHERE id=?";
			
			$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
			$stmt->execute(array($userid,$currentTime,$scheduledDate,$name,$email,$start,$duration,$persons,$phone,$remark,$id));
			$pdo->commit();
			echo json_encode(array("status" => "OK"));
		}
		catch (PDOException $e) {
			$pdo->rollBack();
			echo json_encode(array("status" => "ERROR", "code" => ERROR_GENERAL_DB_NOT_READABLE, "msg" => ERROR_GENERAL_DB_NOT_READABLE_MSG));
		}
	}
	
	private function delReservation($id) {
		try {
			$pdo = $this->dbutils->openDbAndReturnPdo();
			$pdo->beginTransaction();
			$sql = "DELETE FROM `%reservations%` WHERE id=?";
			$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
			$stmt->execute(array($id));
			$pdo->commit();
			echo json_encode(array("status" => "OK"));
		}
		catch (PDOException $e) {
			$pdo->rollBack();
			echo json_encode(array("status" => "ERROR", "code" => ERROR_GENERAL_DB_NOT_READABLE, "msg" => ERROR_GENERAL_DB_NOT_READABLE_MSG));
		}
	}
	
	private function emailConfirmReservation($toEmail,$msg) {
		// first find sender email
		$pdo = $this->dbutils->openDbAndReturnPdo();

		$msg = str_replace("\n", "\r\n", $msg);
	
		$topictxt = "Reservierungsbestätigung\r\n";
	
		if (Emailer::sendEmail($pdo, $msg, $toEmail, $topictxt)) {
			echo json_encode("OK");
		} else {
			echo json_encode("ERROR");
		}
	}
	
	
	private function getGeneralItemFromDbWithPdo($pdo,$field) {
		$aValue="";
		$sql = "SELECT setting FROM %config% where name='$field'";
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute();
		$row =$stmt->fetchObject();
		if ($row != null) {
			$aValue = $row->setting;
		}
		return $aValue;
	}
	
	private function getReservations($day,$month,$year) {
		$day = sprintf("%02s", $day);
		$month = sprintf("%02s", $month);
		
		$scheduledDate = "$year-$month-$day 00:00:00";
		
		try {
			$pdo = $this->dbutils->openDbAndReturnPdo();
			$sql = "SELECT DISTINCT %reservations%.id,%user%.username as username,creationdate,scheduledate,starttime,name,email,persons,duration,phone,remark FROM %reservations%,%user% WHERE scheduledate=? AND %reservations%.creator=%user%.id ORDER BY starttime";
			$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
			$stmt->execute(array($scheduledDate));
			
			$result = $stmt->fetchAll();
			$resArray = array();
	
			foreach($result as $row) {
				$datetimeparts = explode(" ",$row['scheduledate']);
				$thedate = $datetimeparts[0];
				$thedateparts = explode("-",$thedate);
				$resArray[] = array(
						"id" => $row['id'],
						"creator" => $row['username'],
						"creationdate" => $row['creationdate'],
						"day" => $thedateparts[2],
						"month" => $thedateparts[1],
						"year" => $thedateparts[0],
						"start" => $row['starttime'],
						"guest" => $row['name'],
						"email" => $row['email'],
						"persons" => $row['persons'],
						"duration" => $row['duration'],
						"phone" => $row['phone'],
						"remark" => $row['remark'],
						);
			}
			echo json_encode(array("status" => "OK", "msg" => $resArray));
		}
		catch (PDOException $e) {
			echo json_encode(array("status" => "ERROR", "code" => ERROR_GENERAL_DB_NOT_READABLE, "msg" => ERROR_GENERAL_DB_NOT_READABLE_MSG));
		}
	}
}
?>