[enh] Handle the logging out with the SSO

patches/01-logout-success-handler.patch

@@ -0,0 +1,60 @@
+diff --git a/app/config/security.yml b/app/config/security.yml
+index b07b509..62f2550 100644
+--- a/app/config/security.yml
++++ b/app/config/security.yml
+@@ -60,7 +60,7 @@ security:
+ 
+             logout:
+                 path:   /logout
+-                target: /
++                success_handler: yunohost.logout_success_handler
+ 
+     access_control:
+         - { path: ^/api/doc, roles: IS_AUTHENTICATED_ANONYMOUSLY }
+diff --git a/app/config/services.yml b/app/config/services.yml
+index 8a09fde..ee63e06 100644
+--- a/app/config/services.yml
++++ b/app/config/services.yml
+@@ -37,6 +37,9 @@ services:
+         tags:
+             - { name: kernel.event_listener, event: security.interactive_login, method: onInteractiveLogin }
+ 
++    yunohost.logout_success_handler:
++        class: Wallabag\YunoHostBundle\Security\LogoutSuccessHandler
++
+     yunohost.ldap:
+         class: Symfony\Component\Ldap\LdapClient
+         arguments: ["localhost"]
+diff --git a/src/Wallabag/YunoHostBundle/Security/LogoutSuccessHandler.php b/src/Wallabag/YunoHostBundle/Security/LogoutSuccessHandler.php
+new file mode 100644
+index 0000000..b326824
+--- /dev/null
++++ b/src/Wallabag/YunoHostBundle/Security/LogoutSuccessHandler.php
+@@ -0,0 +1,27 @@
++<?php
++
++namespace Wallabag\YunoHostBundle\Security;
++
++use Symfony\Component\HttpFoundation\Request;
++use Symfony\Component\HttpFoundation\RedirectResponse;
++use Symfony\Component\Security\Http\Logout\LogoutSuccessHandlerInterface;
++
++/**
++ * Redirects to the SSO logout URL in case of a successful logout.
++ *
++ * @see http://api.symfony.com/3.1/Symfony/Component/Security/Http/Logout/LogoutSuccessHandlerInterface.html
++ */
++class LogoutSuccessHandler implements LogoutSuccessHandlerInterface
++{
++    /**
++     * {@inheritdoc}
++     */
++    public function onLogoutSuccess(Request $request)
++    {
++        // Retrieve the current SSO logout URL
++        $main_domain = exec('cat /etc/yunohost/current_host');
++        $url = 'https://' . $main_domain . '/yunohost/sso/?action=logout';
++
++        return new RedirectResponse($url);
++    }
++}