Admin_AssetController::getFolderContentPreviewAction PHP Метод

    public function getFolderContentPreviewAction()
    {
        $folder = Asset::getById($this->getParam("id"));
        $start = 0;
        $limit = 10;
        if ($this->getParam("limit")) {
            $limit = $this->getParam("limit");
        }
        if ($this->getParam("start")) {
            $start = $this->getParam("start");
        }
        $condition = "path LIKE '" . ($folder->getRealFullPath() == "/" ? "/%'" : $folder->getRealFullPath() . "/%'") . " AND type != 'folder'";
        $list = Asset::getList(["condition" => $condition, "limit" => $limit, "offset" => $start, "orderKey" => "filename", "order" => "asc"]);
        $assets = [];
        foreach ($list as $asset) {
            $thumbnailMethod = "";
            if ($asset instanceof Asset\Image) {
                $thumbnailMethod = "getThumbnail";
            } elseif ($asset instanceof Asset\Video && \Pimcore\Video::isAvailable()) {
                $thumbnailMethod = "getImageThumbnail";
            } elseif ($asset instanceof Asset\Document && \Pimcore\Document::isAvailable()) {
                $thumbnailMethod = "getImageThumbnail";
            }
            if (!empty($thumbnailMethod)) {
                $filenameDisplay = $asset->getFilename();
                if (strlen($filenameDisplay) > 32) {
                    $filenameDisplay = substr($filenameDisplay, 0, 25) . "..." . \Pimcore\File::getFileExtension($filenameDisplay);
                }
                $assets[] = ["id" => $asset->getId(), "type" => $asset->getType(), "filename" => $asset->getFilename(), "filenameDisplay" => $filenameDisplay, "url" => "/admin/asset/get-" . $asset->getType() . "-thumbnail/id/" . $asset->getId() . "/treepreview/true", "idPath" => $data["idPath"] = Element\Service::getIdPath($asset)];
            }
        }
        $this->_helper->json(["assets" => $assets, "success" => true, "total" => $list->getTotalCount()]);
    }