public function setStamp(Request $request, $bas_id)
    {
        if (null === $file = $request->files->get('newStamp')) {
            $this->app->abort(400);
        }

        if ($file->getClientSize() > 1024 * 1024) {
            return $this->app->redirectPath('admin_display_collection', [
                'bas_id'  => $bas_id,
                'success' => 0,
                'error'   => 'file-too-big',
            ]);
        }

        if (!$file->isValid()) {
            return $this->app->redirectPath('admin_display_collection', [
                'bas_id'  => $bas_id,
                'success' => 0,
                'error'   => 'file-invalid',
            ]);
        }

        $collection = \collection::getByBaseId($this->app, $bas_id);

        try {
            $this->app->getApplicationBox()->write_collection_pic(
                $this->app['media-alchemyst'],
                $this->app['filesystem'],
                $collection,
                $file,
                \collection::PIC_STAMP
            );

            $this->app['filesystem']->remove($file->getPathname());
        } catch (\Exception $e) {
            return $this->app->redirectPath('admin_display_collection', [
                'bas_id'  => $bas_id,
                'success' => 0,
                'error'   => 'file-error',
            ]);
        }

        return $this->app->redirectPath('admin_display_collection', [
            'bas_id'  => $bas_id,
            'success' => 1,
        ]);
    }