feat(link-resolver): Add LinkResolver interface

Author: dborsatto

composer.json

@@ -4,6 +4,7 @@
     "description": "Foundation library for Contentful PHP SDKs",
     "require": {
         "php": "^5.6|^7.0",
+        "ext-json": "*",
         "guzzlehttp/guzzle": "^6.3",
         "guzzlehttp/psr7": "^1.4",
         "psr/http-message": "^1.0",

src/Api/LinkResolverInterface.php

@@ -0,0 +1,23 @@
+<?php
+
+/**
+ * This file is part of the contentful/contentful-core package.
+ *
+ * @copyright 2015-2018 Contentful GmbH
+ * @license   MIT
+ */
+
+namespace Contentful\Core\Api;
+
+use Contentful\Core\Resource\ResourceInterface;
+
+interface LinkResolverInterface
+{
+    /**
+     * @param Link     $link
+     * @param string[] $parameters
+     *
+     * @return ResourceInterface
+     */
+    public function resolveLink(Link $link, array $parameters = []);
+}