Add endpoints to return a server's egg configuration

app/Transformers/Api/Application/BaseTransformer.php

@@ -8,7 +8,6 @@ use Illuminate\Container\Container;
 use Illuminate\Database\Eloquent\Model;
 use League\Fractal\TransformerAbstract;
 use Pterodactyl\Services\Acl\Api\AdminAcl;
-use Pterodactyl\Transformers\Api\Client\BaseClientTransformer;
 use Pterodactyl\Exceptions\Transformer\InvalidTransformerLevelException;
 
 /**
@@ -93,7 +92,7 @@ abstract class BaseTransformer extends TransformerAbstract
         $transformer = Container::getInstance()->makeWith($abstract, $parameters);
         $transformer->setKey($this->getKey());
 
-        if (! $transformer instanceof self || $transformer instanceof BaseClientTransformer) {
+        if (! $transformer instanceof self) {
             throw new InvalidTransformerLevelException('Calls to ' . __METHOD__ . ' must return a transformer that is an instance of ' . __CLASS__);
         }
 

app/Transformers/Api/Client/BaseClientTransformer.php

@@ -5,6 +5,7 @@ namespace Pterodactyl\Transformers\Api\Client;
 use Pterodactyl\Models\User;
 use Webmozart\Assert\Assert;
 use Pterodactyl\Models\Server;
+use Illuminate\Container\Container;
 use Pterodactyl\Exceptions\Transformer\InvalidTransformerLevelException;
 use Pterodactyl\Transformers\Api\Application\BaseTransformer as BaseApplicationTransformer;
 
@@ -63,7 +64,9 @@ abstract class BaseClientTransformer extends BaseApplicationTransformer
      */
     protected function makeTransformer(string $abstract, array $parameters = [])
     {
-        $transformer = parent::makeTransformer($abstract, $parameters);
+        /** @var \Pterodactyl\Transformers\Api\Application\BaseTransformer $transformer */
+        $transformer = Container::getInstance()->makeWith($abstract, $parameters);
+        $transformer->setKey($this->getKey());
 
         if (! $transformer instanceof self) {
             throw new InvalidTransformerLevelException('Calls to ' . __METHOD__ . ' must return a transformer that is an instance of ' . __CLASS__);

app/Transformers/Api/Client/EggTransformer.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace Pterodactyl\Transformers\Api\Client;
+
+use Pterodactyl\Models\Egg;
+
+class EggTransformer extends BaseClientTransformer
+{
+    /**
+     * Return the resource name for the JSONAPI output.
+     *
+     * @return string
+     */
+    public function getResourceName(): string
+    {
+        return Egg::RESOURCE_NAME;
+    }
+
+    /**
+     * @param \Pterodactyl\Models\Egg $egg
+     * @return array
+     */
+    public function transform(Egg $egg)
+    {
+        return [
+            'uuid' => $egg->uuid,
+            'name' => $egg->name,
+        ];
+    }
+}

app/Transformers/Api/Client/ServerTransformer.php

@@ -2,10 +2,16 @@
 
 namespace Pterodactyl\Transformers\Api\Client;
 
+use Pterodactyl\Models\Egg;
 use Pterodactyl\Models\Server;
 
 class ServerTransformer extends BaseClientTransformer
 {
+    /**
+     * @var array
+     */
+    protected $availableIncludes = ['egg'];
+
     /**
      * @return string
      */
@@ -47,4 +53,16 @@ class ServerTransformer extends BaseClientTransformer
             ],
         ];
     }
+
+    /**
+     * Returns the egg associated with this server.
+     *
+     * @param \Pterodactyl\Models\Server $server
+     * @return \League\Fractal\Resource\Item
+     * @throws \Pterodactyl\Exceptions\Transformer\InvalidTransformerLevelException
+     */
+    public function includeEgg(Server $server)
+    {
+        return $this->item($server->egg, $this->makeTransformer(EggTransformer::class), Egg::RESOURCE_NAME);
+    }
 }