first commit -> move some files from one-api

vendor/aws_v3/Aws/Api/Serializer/RestJsonSerializer.php

@@ -0,0 +1,42 @@
+<?php
+namespace Aws\Api\Serializer;
+
+use Aws\Api\Service;
+use Aws\Api\StructureShape;
+
+/**
+ * Serializes requests for the REST-JSON protocol.
+ * @internal
+ */
+class RestJsonSerializer extends RestSerializer
+{
+    /** @var JsonBody */
+    private $jsonFormatter;
+
+    /** @var string */
+    private $contentType;
+
+    /**
+     * @param Service  $api           Service API description
+     * @param string   $endpoint      Endpoint to connect to
+     * @param JsonBody $jsonFormatter Optional JSON formatter to use
+     */
+    public function __construct(
+        Service $api,
+        $endpoint,
+        JsonBody $jsonFormatter = null
+    ) {
+        parent::__construct($api, $endpoint);
+        $this->contentType = JsonBody::getContentType($api);
+        $this->jsonFormatter = $jsonFormatter ?: new JsonBody($api);
+    }
+
+    protected function payload(StructureShape $member, array $value, array &$opts)
+    {
+        $body = isset($value) ?
+            ((string) $this->jsonFormatter->build($member, $value))
+            : "{}";
+        $opts['headers']['Content-Type'] = $this->contentType;
+        $opts['body'] = $body;
+    }
+}