Add delete avatar action

src/Api/Actions/Users/DeleteAvatarAction.php

@@ -0,0 +1,47 @@
+<?php namespace Flarum\Api\Actions\Users;
+
+use Flarum\Core\Commands\DeleteAvatarCommand;
+use Flarum\Api\Actions\SerializeResourceAction;
+use Flarum\Api\JsonApiRequest;
+use Flarum\Api\JsonApiResponse;
+use Illuminate\Contracts\Bus\Dispatcher;
+
+class DeleteAvatarAction extends SerializeResourceAction
+{
+    /**
+     * @var \Illuminate\Contracts\Bus\Dispatcher
+     */
+    protected $bus;
+
+    /**
+     * The name of the serializer class to output results with.
+     *
+     * @var string
+     */
+    public static $serializer = 'Flarum\Api\Serializers\UserSerializer';
+
+    /**
+     * Instantiate the action.
+     *
+     * @param \Illuminate\Contracts\Bus\Dispatcher $bus
+     */
+    public function __construct(Dispatcher $bus)
+    {
+        $this->bus = $bus;
+    }
+
+    /**
+     * Delete a user's avatar, and return the user ready to be serialized and
+     * assigned to the JsonApi response.
+     *
+     * @param \Flarum\Api\JsonApiRequest $request
+     * @param \Flarum\Api\JsonApiResponse $response
+     * @return \Flarum\Core\Models\User
+     */
+    protected function data(JsonApiRequest $request, JsonApiResponse $response)
+    {
+        return $this->bus->dispatch(
+            new DeleteAvatarCommand($request->get('id'), $this->actor->getUser())
+        );
+    }
+}