Json controller trait

common/Define/Controller/Json.php

@@ -0,0 +1,13 @@
+<?php
+namespace ProVM\Common\Define\Controller;
+
+use Psr\Http\Message\ResponseInterface as Response;
+
+trait Json {
+  public function withJson(Response $response, $output, $status = 200) {
+    $response->getBody()->write(json_encode($output));
+    return $response
+      ->withHeader('Content-Type', 'application/json')
+      ->withStatus($status);
+  }
+}