Use parsed body if present

Author: tobyzerner

src/Context.php

@@ -92,6 +92,6 @@ public function filter(string $name): ?string
      */
     public function getBody(): ?array
     {
-        return json_decode($this->request->getBody()->getContents(), true);
+        return $this->request->getParsedBody() ?: json_decode($this->request->getBody()->getContents(), true);
     }
 }

src/Extension/Atomic.php

@@ -50,7 +50,7 @@ public function handle(Context $context): ?Response
             throw new MethodNotAllowedException();
         }
 
-        $body = $request->getParsedBody();
+        $body = $context->getBody();
         $operations = $body['atomic:operations'] ?? null;
 
         if (! is_array($operations)) {