Rough extension management implementation

src/Api/Actions/Extensions/UpdateAction.php

@@ -0,0 +1,43 @@
+<?php namespace Flarum\Api\Actions\Extensions;
+
+use Flarum\Api\Actions\JsonApiAction;
+use Flarum\Api\Request;
+use Illuminate\Contracts\Bus\Dispatcher;
+use Flarum\Core\Exceptions\PermissionDeniedException;
+use Flarum\Support\ExtensionManager;
+
+class UpdateAction extends JsonApiAction
+{
+    protected $extensions;
+
+    public function __construct(ExtensionManager $extensions)
+    {
+        $this->extensions = $extensions;
+    }
+
+    protected function respond(Request $request)
+    {
+        if (! $request->actor->isAdmin()) {
+            throw new PermissionDeniedException;
+        }
+
+        $enabled = $request->get('enabled');
+        $name = $request->get('name');
+
+        if ($enabled === true) {
+            $this->extensions->enable($name);
+        } elseif ($enabled === false) {
+            $this->extensions->disable($name);
+        }
+
+        app('flarum.formatter')->flush();
+
+        $assetPath = public_path('assets');
+        $manifest = file_get_contents($assetPath . '/rev-manifest.json');
+        $revisions = json_decode($manifest, true);
+
+        foreach ($revisions as $file => $revision) {
+            @unlink($assetPath . '/' . substr_replace($file, '-' . $revision, strrpos($file, '.'), 0));
+        }
+    }
+}