Add the Login action.

app/src/Controller/User/LoginUserAction.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace Slovocast\Controller\User;
+
+use Slovocast\Controller\Controller;
+use Slovocast\Domain\Repository\UserRepositoryInterface;
+use Slovocast\Infrastructure\User\UserAuthorizationInterface;
+use Slovocast\Exception\EntityNotFoundException;
+use Psr\Http\Message\ResponseInterface as Response;
+use Odan\Session\SessionInterface;
+
+class LoginUserAction extends Controller
+{
+    public function __construct(
+        private UserAuthorizationInterface $auth,
+        private UserRepositoryInterface $userRepository,
+        private SessionInterface $session
+    ) { }
+
+    public function handle(): Response
+    {
+        $credentials = $this->request->getParsedBody();
+
+        try {
+            $user = $this->userRepository->getFromEmail($credentials['email']);
+        } catch (EntityNotFoundException $e) {
+            $this->session->getFlash()->add('error', "Unable to login user.");
+            return $this->response->withStatus(400);
+        }
+
+        if (!$this->auth->verify($credentials['password'], $user->getPassword())) {
+            $this->session->getFlash()->add('error', 'Unable to login.');
+            return $this->response->withStatus(400);
+        }
+
+        // start the session
+        $this->session->set('user', [ 'id' => $user->getId() ]);
+        return $this->response;
+    }
+}