Extract automation API to MailPoet REST API

[MAILPOET-4523]

mailpoet/lib/API/REST/Request.php

@@ -0,0 +1,29 @@
+<?php declare(strict_types = 1);
+
+namespace MailPoet\API\REST;
+
+use WP_REST_Request;
+
+class Request {
+  /** @var WP_REST_Request */
+  private $wpRequest;
+
+  public function __construct(
+    WP_REST_Request $wpRequest
+  ) {
+    $this->wpRequest = $wpRequest;
+  }
+
+  public function getHeader(string $key): ?string {
+    return $this->wpRequest->get_header($key);
+  }
+
+  public function getParams(): array {
+    return $this->wpRequest->get_params();
+  }
+
+  /** @return mixed */
+  public function getParam(string $name) {
+    return $this->wpRequest->get_param($name);
+  }
+}