Make server listing and single server view API endpoints work

app/Transformers/Api/Application/LocationTransformer.php

@@ -0,0 +1,61 @@
+<?php
+
+namespace Pterodactyl\Transformers\Api\Application;
+
+use Pterodactyl\Models\Location;
+use Pterodactyl\Services\Acl\Api\AdminAcl;
+
+class LocationTransformer extends BaseTransformer
+{
+    /**
+     * List of resources that can be included.
+     *
+     * @var array
+     */
+    protected $availableIncludes = ['nodes', 'servers'];
+
+    /**
+     * Return a generic transformed pack array.
+     *
+     * @param \Pterodactyl\Models\Location $location
+     * @return array
+     */
+    public function transform(Location $location): array
+    {
+        return $location->toArray();
+    }
+
+    /**
+     * Return the nodes associated with this location.
+     *
+     * @param \Pterodactyl\Models\Location $location
+     * @return \League\Fractal\Resource\Collection|\League\Fractal\Resource\NullResource
+     */
+    public function includeServers(Location $location)
+    {
+        if (! $this->authorize(AdminAcl::RESOURCE_SERVERS)) {
+            return $this->null();
+        }
+
+        $location->loadMissing('servers');
+
+        return $this->collection($location->getRelation('servers'), $this->makeTransformer(ServerTransformer::class), 'server');
+    }
+
+    /**
+     * Return the nodes associated with this location.
+     *
+     * @param \Pterodactyl\Models\Location $location
+     * @return \League\Fractal\Resource\Collection|\League\Fractal\Resource\NullResource
+     */
+    public function includeNodes(Location $location)
+    {
+        if (! $this->authorize(AdminAcl::RESOURCE_NODES)) {
+            return $this->null();
+        }
+
+        $location->loadMissing('nodes');
+
+        return $this->collection($location->getRelation('nodes'), $this->makeTransformer(NodeTransformer::class), 'node');
+    }
+}