Pimcore\Model\Element\Service::minimizePropertiesForEditmode PHP Method

    public static function minimizePropertiesForEditmode($props)
    {
        $properties = [];
        foreach ($props as $key => $p) {
            //$p = object2array($p);
            $allowedProperties = ["key", "o_key", "filename", "path", "o_path", "id", "o_id", "o_type", "type"];
            if ($p->getData() instanceof Document || $p->getData() instanceof Asset || $p->getData() instanceof Object\AbstractObject) {
                $pa = [];
                $vars = get_object_vars($p->getData());
                foreach ($vars as $k => $value) {
                    if (in_array($k, $allowedProperties)) {
                        $pa[$k] = $p->getData()->{$k};
                    }
                }
                // clone it because of caching
                $tmp = clone $p;
                $tmp->setData($pa);
                $properties[$key] = object2array($tmp);
            } else {
                $properties[$key] = object2array($p);
            }
            // add config from predefined properties
            if ($p->getName() && $p->getType()) {
                $predefined = Model\Property\Predefined::getByKey($p->getName());
                if ($predefined && $predefined->getType() == $p->getType()) {
                    $properties[$key]["config"] = $predefined->getConfig();
                    $properties[$key]["description"] = $predefined->getDescription();
                }
            }
        }
        return $properties;
    }

 public function getDataByIdAction()
 {
     // check for lock
     if (Element\Editlock::isLocked($this->getParam("id"), "asset")) {
         $this->_helper->json(["editlock" => Element\Editlock::getByElement($this->getParam("id"), "asset")]);
     }
     Element\Editlock::lock($this->getParam("id"), "asset");
     $asset = Asset::getById(intval($this->getParam("id")));
     $asset = clone $asset;
     if (!$asset instanceof Asset) {
         $this->_helper->json(["success" => false, "message" => "asset doesn't exist"]);
     }
     $asset->setMetadata(Asset\Service::expandMetadataForEditmode($asset->getMetadata()));
     $asset->setProperties(Element\Service::minimizePropertiesForEditmode($asset->getProperties()));
     //$asset->getVersions();
     $asset->getScheduledTasks();
     $asset->idPath = Element\Service::getIdPath($asset);
     $asset->userPermissions = $asset->getUserPermissions();
     $asset->setLocked($asset->isLocked());
     $asset->setParent(null);
     if ($asset instanceof Asset\Text) {
         $asset->data = $asset->getData();
     }
     if ($asset instanceof Asset\Image) {
         $imageInfo = [];
         if ($asset->getWidth() && $asset->getHeight()) {
             $imageInfo["dimensions"] = [];
             $imageInfo["dimensions"]["width"] = $asset->getWidth();
             $imageInfo["dimensions"]["height"] = $asset->getHeight();
         }
         if (function_exists("exif_read_data") && is_file($asset->getFileSystemPath())) {
             $supportedTypes = [IMAGETYPE_JPEG, IMAGETYPE_TIFF_II, IMAGETYPE_TIFF_MM];
             if (in_array(@exif_imagetype($asset->getFileSystemPath()), $supportedTypes)) {
                 $exif = @exif_read_data($asset->getFileSystemPath());
                 if (is_array($exif)) {
                     $imageInfo["exif"] = [];
                     foreach ($exif as $name => $value) {
                         if (is_string($value) && strlen($value) < 50 || is_numeric($value)) {
                             // this is to ensure that the data can be converted to json (must be utf8)
                             if (mb_check_encoding($value, "UTF-8")) {
                                 $imageInfo["exif"][$name] = $value;
                             }
                         }
                     }
                 }
             }
         }
         $asset->imageInfo = $imageInfo;
     }
     $asset->setStream(null);
     //Hook for modifying return value - e.g. for changing permissions based on object data
     //data need to wrapped into a container in order to pass parameter to event listeners by reference so that they can change the values
     $returnValueContainer = new Model\Tool\Admin\EventDataContainer(object2array($asset));
     \Pimcore::getEventManager()->trigger("admin.asset.get.preSendData", $this, ["asset" => $asset, "returnValueContainer" => $returnValueContainer]);
     if ($asset->isAllowed("view")) {
         $this->_helper->json($returnValueContainer->getData());
     }
     $this->_helper->json(["success" => false, "message" => "missing_permission"]);
 }