feat(demo): add story 1 — Sorano: Rock and Time

plugins/email/vendor/symfony/messenger/Middleware/ActivationMiddleware.php

@@ -0,0 +1,46 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Messenger\Middleware;
+
+use Symfony\Component\Messenger\Envelope;
+
+/**
+ * Execute the inner middleware according to an activation strategy.
+ *
+ * @author Maxime Steinhausser <maxime.steinhausser@gmail.com>
+ */
+class ActivationMiddleware implements MiddlewareInterface
+{
+    private $inner;
+    private $activated;
+
+    /**
+     * @param bool|callable $activated
+     */
+    public function __construct(MiddlewareInterface $inner, $activated)
+    {
+        $this->inner = $inner;
+        $this->activated = $activated;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function handle(Envelope $envelope, StackInterface $stack): Envelope
+    {
+        if (\is_callable($this->activated) ? ($this->activated)($envelope) : $this->activated) {
+            return $this->inner->handle($envelope, $stack);
+        }
+
+        return $stack->next()->handle($envelope, $stack);
+    }
+}