chore: reimplement backend

Author: DavideIadeluca

extend.php

@@ -18,4 +18,13 @@
         ->js(__DIR__.'/js/dist/forum.js'),
 
     new Extend\Locales(__DIR__.'/resources/locale'),
+
+    (new Extend\Middleware('forum'))
+        ->add(Middleware\ApplyUserSortingMiddleware::class),
+
+    (new Extend\Middleware('api'))
+        ->add(Middleware\ApplyUserSortingMiddleware::class),
+
+    (new Extend\User)
+        ->registerPreference('discussion_sort'),
 ];

src/.gitkeep

@@ -0,0 +1,40 @@
+<?php
+
+namespace GlowingBlue\SaveSortingPreferences\Middleware;
+
+use Flarum\Http\RequestUtil;
+use Flarum\User\Guest;
+use Illuminate\Support\Arr;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use Psr\Http\Server\MiddlewareInterface;
+use Psr\Http\Server\RequestHandlerInterface;
+
+class ApplyUserSortingMiddleware implements MiddlewareInterface
+{
+    public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
+    {
+        $actor = RequestUtil::getActor($request);
+
+        if ($request->getUri()->getPath() !== '/') {
+            return $handler->handle($request);
+        }
+
+        if ($actor instanceof Guest) {
+            return $handler->handle($request);
+        }
+
+        $params = $request->getQueryParams();
+
+        $sort = Arr::get($params, 'sort');
+        $lastSelectedSort = $actor->getPreference('discussion_sort');
+
+        $request = $request->withQueryParams(
+            array_merge($params, [
+                "sort" => $sort ?? $lastSelectedSort,
+            ])
+        );
+
+        return $handler->handle($request);
+    }
+}