Make server listing and single server view API endpoints work

app/Transformers/Api/Application/AllocationTransformer.php

@@ -0,0 +1,71 @@
+<?php
+
+namespace Pterodactyl\Transformers\Api\Application;
+
+use Pterodactyl\Models\Allocation;
+use Pterodactyl\Services\Acl\Api\AdminAcl;
+
+class AllocationTransformer extends BaseTransformer
+{
+    /**
+     * Relationships that can be loaded onto allocation transformations.
+     *
+     * @var array
+     */
+    protected $availableIncludes = ['node', 'server'];
+
+    /**
+     * Return a generic transformed allocation array.
+     *
+     * @param \Pterodactyl\Models\Allocation $allocation
+     * @return array
+     */
+    public function transform(Allocation $allocation)
+    {
+        return [
+            'id' => $allocation->id,
+            'ip' => $allocation->ip,
+            'alias' => $allocation->ip_alias,
+            'port' => $allocation->port,
+            'assigned' => ! is_null($allocation->server_id),
+        ];
+    }
+
+    /**
+     * Load the node relationship onto a given transformation.
+     *
+     * @param \Pterodactyl\Models\Allocation $allocation
+     * @return \League\Fractal\Resource\Item|\League\Fractal\Resource\NullResource
+     */
+    public function includeNode(Allocation $allocation)
+    {
+        if (! $this->authorize(AdminAcl::RESOURCE_NODES)) {
+            return $this->null();
+        }
+
+        $allocation->loadMissing('node');
+
+        return $this->item(
+            $allocation->getRelation('node'), $this->makeTransformer(NodeTransformer::class), 'node'
+        );
+    }
+
+    /**
+     * Load the server relationship onto a given transformation.
+     *
+     * @param \Pterodactyl\Models\Allocation $allocation
+     * @return \League\Fractal\Resource\Item|\League\Fractal\Resource\NullResource
+     */
+    public function includeServer(Allocation $allocation)
+    {
+        if (! $this->authorize(AdminAcl::RESOURCE_SERVERS)) {
+            return $this->null();
+        }
+
+        $allocation->loadMissing('server');
+
+        return $this->item(
+            $allocation->getRelation('server'), $this->makeTransformer(ServerTransformer::class), 'server'
+        );
+    }
+}