allow vendord

vendor/google/gax/src/Middleware/ResponseMetadataMiddleware.php

@@ -0,0 +1,73 @@
+<?php
+/*
+ * Copyright 2018 Google LLC
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+namespace Google\ApiCore\Middleware;
+
+use Google\ApiCore\Call;
+use GuzzleHttp\Promise\Promise;
+use GuzzleHttp\Promise\PromiseInterface;
+
+/**
+ * Middleware which transforms $response into [$response, $metadata]
+ *
+ * @internal
+ */
+class ResponseMetadataMiddleware implements MiddlewareInterface
+{
+    /** @var callable */
+    private $nextHandler;
+
+    /**
+     * @param callable $nextHandler
+     */
+    public function __construct(callable $nextHandler)
+    {
+        $this->nextHandler = $nextHandler;
+    }
+
+    public function __invoke(Call $call, array $options)
+    {
+        $metadataReceiver = new Promise();
+        $options['metadataCallback'] = function ($metadata) use ($metadataReceiver) {
+            $metadataReceiver->resolve($metadata);
+        };
+        $next = $this->nextHandler;
+        return $next($call, $options)->then(
+            function ($response) use ($metadataReceiver) {
+                if ($metadataReceiver->getState() === PromiseInterface::FULFILLED) {
+                    return [$response, $metadataReceiver->wait()];
+                } else {
+                    return [$response, []];
+                }
+            }
+        );
+    }
+}