public function createZone()
 {
     REST::requireRequestMethod('PUT');
     $requiredParameters = array('polygon');
     if (Util::isValid($requiredParameters, $values, $this->params)) {
         extract($values);
         $polygonData = explode('|', $polygon);
         if (count($polygonData) < 3) {
             REST::sendResponse(400);
         }
         $waypoints = array();
         foreach ($polygonData as $polygonDate) {
             $waypointData = explode(';', $polygonDate);
             if (count($waypointData) != 2) {
                 REST::sendResponse(400);
             }
             $waypoints[] = array('lat' => $waypointData[0], 'lon' => $waypointData[1]);
         }
         $db = new MySQL();
         $zoneID = Model::createZone($type);
         if ($zoneID > 0) {
             foreach ($waypoints as $waypoint) {
                 if (!Model::createWaypoint($zoneID, $waypoint['lat'], $waypoint['lon'])) {
                     REST::sendResponse(500);
                 }
             }
             REST::sendResponse(201, $zoneID);
         } else {
             REST::sendResponse(500);
         }
     } else {
         REST::sendResponse(400);
     }
 }