<?php
require_once ('dbutils.php');

class Feedback {
	var $dbutils;
	function __construct() {
		$this->dbutils = new DbUtils();
	}
	
	function handleCommand($command) {
		if ($command == 'sendMail') {
			$this->sendMail($_POST['role'],$_POST['topic'],$_POST['email'],$_POST['tel'],$_POST['allowSendRights'],$_POST['content']);
		}
		else {
			echo "Kommando nicht unterstuetzt.";
		}
	}
	
	function isUserAlreadyLoggedInForPhp() {
		if(session_id() == '') {
			session_start();
		}
		if (!isset($_SESSION['angemeldet']) || !$_SESSION['angemeldet']) {
			return false;
		} else {
			return true;
		}
	}

	private function getFromEmail() {
		$pdo = $this->dbutils->openDbAndReturnPdo();
		
		$email="";
		$sql = "SELECT setting FROM %config% where name='email'";
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute();
		$row =$stmt->fetchObject();
		if ($row != null) {
			$email = $row->setting;
		}
		return $email;
	}
	
	function spamcheck($field) {
		// Sanitize e-mail address
		$field=filter_var($field, FILTER_SANITIZE_EMAIL);
		// Validate e-mail address
		if(filter_var($field, FILTER_VALIDATE_EMAIL)) {
			return TRUE;
		} else {
			return FALSE;
		}
	}
	
	function sqlresult($pdo,$sql,$sqlval) {
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute();
		$row =$stmt->fetchObject();
		if ($row != null) {
			return($row->$sqlval);
		} else {
			return 0;
		}
	}
	function getdbinfo() {
		$pdo = $this->dbutils->openDbAndReturnPdo();
		
		$info = "\n\nWaiting print jobs:\n";
		// workprintjobswaiting
		$foodjobs = $this->sqlresult($pdo,"select count(id) as number from %printjobs% where type=1","number");
		$drinkjobs = $this->sqlresult($pdo,"select count(id) as number from %printjobs% where type=2","number");
		$payjobs = $this->sqlresult($pdo,"select count(id) as number from %printjobs% where type=3","number");
		
		$info .= "Speisebons: $foodjobs\n";
		$info .= "Getränkebons: $drinkjobs\n";
		$info .= "Kassenbons: $payjobs\n\n";
		
		// db sizes
		$info .= $this->getDatabaseSizes($pdo);
		return $info;
	}
	
	function getDatabaseSizes($pdo) {
		$sql = 'SELECT table_schema "Data Base Name",
    			sum( data_length + index_length ) / 1024 / 1024 "Data Base Size in MB",
    			sum( data_free )/ 1024 / 1024 "Free Space in MB"
				FROM information_schema.TABLES
				GROUP BY table_schema';
		$pdo = $this->dbutils->openDbAndReturnPdo();
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute();
		$result = $stmt->fetchAll();
		$dbInfo = "DB-info:\n";
		
		foreach($result as $row) {
			$dbInfo .= "Database '$row[0]', db size in MB: $row[1], free space in MB: $row[2]\n";
		}
		$dbInfo .= "used DB '" . MYSQL_DB . "'\n\n";
		return $dbInfo;
	}
	
	function sendMail($role,$topic,$email,$tel,$allowSendRights,$content) {
		if (!$this->spamcheck($email)) {
			echo json_encode("Falsche Emailadresse eingegeben!");
			return;
		}
		
		$headers  = "MIME-Version: 1.0\n";
		$headers .= "Content-type: text/plain; charset=iso-8859-1\n";
	
		$rights = "Keine Rechteinformation";
		$from = $this->getFromEmail();
		
		if ($this->spamcheck($from)) {
			$headers .= "To: feedback@ordersprinter.de\n";
			$headers .= "From: $from\n";
			$headers .= "Cc: $email\n";
			if ($this->isUserAlreadyLoggedInForPhp()) {
				if ($allowSendRights) {
					$rights = "Userid = " . $_SESSION['userid'] . "\n";
					$rights .= "Username = " . $_SESSION['currentuser'] . "\n";
					$rights .= "isAdmin = " . ($_SESSION['is_admin'] ? "ja" : "nein") . "\n";
					$rights .= "right_waiter = " . ($_SESSION['right_waiter'] ? "ja" : "nein") . "\n";
					$rights .= "right_kitchen = " . ($_SESSION['right_kitchen'] ? "ja" : "nein") . "\n";
					$rights .= "right_bar = " . ($_SESSION['right_bar'] ? "ja" : "nein") . "\n";
					$rights .= "right_supply = " . ($_SESSION['right_supply'] ? "ja" : "nein") . "\n";
					$rights .= "right_paydesk = " . ($_SESSION['right_paydesk'] ? "ja" : "nein") . "\n";
					$rights .= "right_statistics = " . ($_SESSION['right_statistics'] ? "ja" : "nein") . "\n";
					$rights .= "right_bill = " . ($_SESSION['right_bill'] ? "ja" : "nein") . "\n";
					$rights .= "right_products = " . ($_SESSION['right_products'] ? "ja" : "nein") . "\n";
					$rights .= "right_manager = " . ($_SESSION['right_manager'] ? "ja" : "nein");
					$rights .= $this->getdbinfo();
				}
				$server = $_SERVER['HTTP_USER_AGENT'];
				$msg = "Rolle: $role\nEmail: $email\nTel.: $tel\nRechte: $rights\nServer:$server\n\nNachtricht:\n$content";
				
				$msg = wordwrap($msg, 70);

				// Verarbeitet \r\n's zuerst, so dass sie nicht doppelt konvertiert werden
				$msg = str_replace("\n", "\r\n", $msg);
				
				if (mail("feedback@ordersprinter.de", $topic, $msg, $headers, "-f $from")) {
					echo json_encode("OK");
				} else {
					echo json_encode("Fehler: Mail konnte nicht verschickt werden! Stimmt die PHP-Konfiguration auf dem Server?");
				}
			} else {
				echo json_encode("Fehler: Benutzer nicht eingeloggt!");
			}
		} else {
			echo json_encode("Mailkonfiguration von OrderSprinter fehlerhaft!");
		}
	}
}
?>