implement transaction key/value download

src/Controller/MainController.php

@@ -139,6 +139,60 @@ class MainController extends AbstractController
         {
             if ($record['transaction'] === $request->get('transaction'))
             {
+                switch ($request->get('get'))
+                {
+                    case 'key':
+
+                        $response = new Response();
+
+                        $response->headers->set(
+                            'Content-length',
+                            strlen(
+                                $record['key']
+                            )
+                        );
+
+                        $response->headers->set(
+                            'Content-Disposition',
+                            sprintf(
+                                'attachment; filename="%s.key";',
+                                $request->get('transaction')
+                            )
+                        );
+
+                        $response->sendHeaders();
+
+                        return $response->setContent(
+                            $record['key']
+                        );
+
+                    case 'value':
+
+                        $response = new Response();
+
+                        $response->headers->set(
+                            'Content-length',
+                            strlen(
+                                $record['value']
+                            )
+                        );
+
+                        $response->headers->set(
+                            'Content-Disposition',
+                            sprintf(
+                                'attachment; filename="%s.value";',
+                                $request->get('transaction')
+                            )
+                        );
+
+                        $response->sendHeaders();
+
+                        return $response->setContent(
+                            $record['value']
+                        );
+
+                    default:
+
                         return $this->render(
                             'default/main/transaction.html.twig',
                             [
@@ -148,6 +202,7 @@ class MainController extends AbstractController
                         );
                 }
             }
+        }
 
         throw $this->createNotFoundException();
     }