Add user list endpoint (list all users)

app/dependencies.php

@@ -76,6 +76,10 @@ $container->set('App\Action\ProjectAction', function (ContainerInterface $c) {
     return new App\Action\ProjectAction($c->get('em'));
 });
 
+$container->set('App\Action\UserListAction', function (ContainerInterface $c) {
+    return new App\Action\UserListAction($c->get('em'));
+});
+
 $container->set('App\Action\GroupListAction', function (ContainerInterface $c) {
     return new App\Action\GroupListAction($c->get('em'));
 });

app/routes.php

@@ -18,6 +18,7 @@ $app->map([OPTIONS, GET, PUT, DELETE], '/database/{id}', App\Action\DatabaseActi
 $app->map([OPTIONS, GET], '/database/{id}/table', App\Action\TableListAction::class);
 $app->map([OPTIONS, GET, POST], '/project', App\Action\ProjectListAction::class);
 $app->map([OPTIONS, GET, PUT, DELETE], '/project/{name}', App\Action\ProjectAction::class);
+$app->map([OPTIONS, GET], '/user', App\Action\UserListAction::class);
 $app->map([OPTIONS, GET, POST], '/group', App\Action\GroupListAction::class);
 $app->map([OPTIONS, GET, POST], '/group/{id}', App\Action\GroupAction::class);
 $app->map([OPTIONS, GET, POST], '/instance', App\Action\InstanceListAction::class);

src/Action/UserListAction.php

+<?php
+
+/*
+ * This file is part of Anis Server.
+ *
+ * (c) Laboratoire d'Astrophysique de Marseille / CNRS
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+declare(strict_types=1);
+
+namespace App\Action;
+
+use Psr\Http\Message\ServerRequestInterface as Request;
+use Psr\Http\Message\ResponseInterface as Response;
+use Slim\Exception\HttpBadRequestException;
+use App\Entity\User;
+
+final class UserListAction extends AbstractAction
+{
+    /**
+     * `GET`  Returns a list of all users listed in the metamodel
+     *
+     * @param  ServerRequestInterface $request  PSR-7 This object represents the HTTP request
+     * @param  ResponseInterface      $response PSR-7 This object represents the HTTP response
+     * @param  string[]               $args     This table contains information transmitted in the URL (see routes.php)
+     *
+     * @return ResponseInterface
+     */
+    public function __invoke(Request $request, Response $response, array $args): Response
+    {
+        if ($request->getMethod() === OPTIONS) {
+            return $response->withHeader('Access-Control-Allow-Methods', 'GET, OPTIONS');
+        }
+
+        if ($request->getMethod() === GET) {
+            $users = $this->em->getRepository('App\Entity\User')->findAll();
+            $payload = json_encode($users);
+        }
+
+        $response->getBody()->write($payload);
+        return $response;
+    }
+}