added support for saml login (#1408)

src/Saml/Logout/SamlLogoutHandler.php

@@ -0,0 +1,56 @@
+<?php
+
+/*
+ * This file is part of the Kimai time-tracking app.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace App\Saml\Logout;
+
+use App\Saml\SamlAuth;
+use Hslavich\OneloginSamlBundle\Security\Authentication\Token\SamlTokenInterface;
+use OneLogin\Saml2\Error;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Security\Core\Authentication\Token\TokenInterface;
+use Symfony\Component\Security\Http\Logout\LogoutHandlerInterface;
+
+final class SamlLogoutHandler implements LogoutHandlerInterface
+{
+    /**
+     * @var SamlAuth
+     */
+    private $samlAuth;
+
+    public function __construct(SamlAuth $samlAuth)
+    {
+        $this->samlAuth = $samlAuth;
+    }
+
+    /**
+     * This method is called by the LogoutListener when a user has requested
+     * to be logged out. Usually, you would unset session variables, or remove
+     * cookies, etc.
+     *
+     * @param Request $request
+     * @param Response $response
+     * @param TokenInterface $token
+     */
+    public function logout(Request $request, Response $response, TokenInterface $token)
+    {
+        if (!$token instanceof SamlTokenInterface) {
+            return;
+        }
+
+        try {
+            $this->samlAuth->processSLO();
+        } catch (Error $e) {
+            if (!empty($this->samlAuth->getSLOurl())) {
+                $sessionIndex = $token->hasAttribute('sessionIndex') ? $token->getAttribute('sessionIndex') : null;
+                $this->samlAuth->logout(null, [], $token->getUsername(), $sessionIndex);
+            }
+        }
+    }
+}