Move everything around as needed to get things setup for the client API

app/Transformers/Api/Client/BaseClientTransformer.php

@@ -0,0 +1,44 @@
+<?php
+
+namespace Pterodactyl\Transformers\Api\Client;
+
+use Pterodactyl\Services\Acl\Api\AdminAcl;
+use Pterodactyl\Exceptions\Transformer\InvalidTransformerLevelException;
+use Pterodactyl\Transformers\Api\Application\BaseTransformer as BaseApplicationTransformer;
+
+abstract class BaseClientTransformer extends BaseApplicationTransformer
+{
+    /**
+     * Determine if the API key loaded onto the transformer has permission
+     * to access a different resource. This is used when including other
+     * models on a transformation request.
+     *
+     * @param string $resource
+     * @return bool
+     */
+    protected function authorize(string $resource): bool
+    {
+        return AdminAcl::check($this->getKey(), $resource, AdminAcl::READ);
+    }
+
+    /**
+     * Create a new instance of the transformer and pass along the currently
+     * set API key.
+     *
+     * @param string $abstract
+     * @param array  $parameters
+     * @return self
+     *
+     * @throws \Pterodactyl\Exceptions\Transformer\InvalidTransformerLevelException
+     */
+    protected function makeTransformer(string $abstract, array $parameters = [])
+    {
+        $transformer = parent::makeTransformer($abstract, $parameters);
+
+        if (! $transformer instanceof self) {
+            throw new InvalidTransformerLevelException('Calls to ' . __METHOD__ . ' must return a transformer that is an instance of ' . __CLASS__);
+        }
+
+        return $transformer;
+    }
+}