Add Content for User page, preload user & throw 404 accordingly (#1901)

js/src/forum/components/UserPage.js

@@ -88,8 +88,13 @@ export default class UserPage extends Page {
   loadUser(username) {
     const lowercaseUsername = username.toLowerCase();
 
+    // Load the preloaded user object, if any, into the global app store
+    // We don't use the output of the method because it returns raw JSON
+    // instead of the parsed models
+    app.preloadedApiDocument();
+
     app.store.all('users').some(user => {
-      if (user.username().toLowerCase() === lowercaseUsername && user.joinTime()) {
+      if ((user.username().toLowerCase() === lowercaseUsername || user.id() === username) && user.joinTime()) {
         this.show(user);
         return true;
       }

src/Forum/Content/User.php

@@ -0,0 +1,82 @@
+<?php
+
+/*
+ * This file is part of Flarum.
+ *
+ * For detailed copyright and license information, please view the
+ * LICENSE file that was distributed with this source code.
+ */
+
+namespace Flarum\Forum\Content;
+
+use Flarum\Api\Client;
+use Flarum\Api\Controller\ShowUserController;
+use Flarum\Frontend\Document;
+use Flarum\Http\UrlGenerator;
+use Flarum\User\User as FlarumUser;
+use Illuminate\Database\Eloquent\ModelNotFoundException;
+use Illuminate\Support\Arr;
+use Psr\Http\Message\ServerRequestInterface as Request;
+
+class User
+{
+    /**
+     * @var Client
+     */
+    protected $api;
+
+    /**
+     * @var UrlGenerator
+     */
+    protected $url;
+
+    /**
+     * @param Client $api
+     * @param UrlGenerator $url
+     */
+    public function __construct(Client $api, UrlGenerator $url)
+    {
+        $this->api = $api;
+        $this->url = $url;
+    }
+
+    public function __invoke(Document $document, Request $request)
+    {
+        $queryParams = $request->getQueryParams();
+        $actor = $request->getAttribute('actor');
+        $userId = Arr::get($queryParams, 'username');
+
+        $params = [
+            'id' => $userId,
+        ];
+
+        $apiDocument = $this->getApiDocument($actor, $params);
+        $user = $apiDocument->data->attributes;
+
+        $document->title = $user->displayName;
+        $document->canonicalUrl = $this->url->to('forum')->route('user', ['username' => $user->username]);
+        $document->payload['apiDocument'] = $apiDocument;
+
+        return $document;
+    }
+
+    /**
+     * Get the result of an API request to show a user.
+     *
+     * @param FlarumUser $actor
+     * @param array $params
+     * @return object
+     * @throws ModelNotFoundException
+     */
+    protected function getApiDocument(FlarumUser $actor, array $params)
+    {
+        $response = $this->api->send(ShowUserController::class, $actor, $params);
+        $statusCode = $response->getStatusCode();
+
+        if ($statusCode === 404) {
+            throw new ModelNotFoundException;
+        }
+
+        return json_decode($response->getBody());
+    }
+}

src/Forum/routes.php

@@ -28,7 +28,7 @@ return function (RouteCollection $map, RouteHandlerFactory $route) {
     $map->get(
         '/u/{username}[/{filter:[^/]*}]',
         'user',
-        $route->toForum()
+        $route->toForum(Content\User::class)
     );
 
     $map->get(