add logged out view as landing page after oidc logout redirect

loops/browser/auth.pt

@@ -40,3 +40,24 @@
       </form>
     </div>
 </metal:login>
+
+
+<metal:loggedout define-macro="loggedout"
+                 i18n:domain="loops"
+                 tal:define="principal request/principal/id">
+    <h2 i18n:translate="">Logged out</h2>
+    <div>
+      <p i18n:translate=""
+         tal:condition="python: principal == 'zope.anybody'">Your have been successfully logged out from this application. Please login again if needed or close this browser tab</p>
+      <p i18n:translate=""
+         tal:condition="python: principal != 'zope.anybody'">
+        You are not authorized to perform this action. However, you may login as a
+        different user who is authorized.</p>
+      <div class="row">
+        <button i18n:translate="">
+          <a i18n:translate=""
+             tal:attributes="href view/baseUrl">Log in again</a></button>
+
+      </div>
+    </div>
+</metal:loggedout>

loops/browser/auth.py

@@ -57,6 +57,24 @@ class Logout(object):
         return nx
 
 
+class Loggedout(NodeView):
+
+    template = template
+
+    @Lazy
+    def macro(self):
+        return self.template.macros['loggedout']
+
+    @Lazy
+    def item(self):
+        return self
+
+    @Lazy
+    def baseUrl(self):
+        url = self.menu.url
+        return url
+
+
 class Unauthorized(ConceptView):
 
     isTopLevel = True

loops/browser/configure.zcml

@@ -44,6 +44,11 @@
         class="loops.browser.auth.Logout"
         permission="zope.View" />
 
+  <page for="loops.interfaces.INode"
+        name="loggedout.html"
+        class="loops.browser.auth.Loggedout"
+        permission="zope.View" />
+
   <!-- see also view/adapter "login.html" in section "query views" -->
 
   <!-- macros -->

loops/locales/de/LC_MESSAGES/loops.po

@@ -604,9 +604,18 @@ msgstr "Nicht angemeldet"
 msgid "Log in"
 msgstr "Anmelden"
 
+msgid "Log in again"
+msgstr "Erneut anmelden"
+
 msgid "Presence"
 msgstr "Anwesenheit"
 
+msgid "Logged out"
+msgstr "Abgemeldet"
+
+msgid "Your have been successfully logged out from this application. Please login again if needed or close this browser tab"
+msgstr "Sie haben sich erfolgreich von dieser Anwendung abgemeldet. Bitte loggen Sie sich bei Bedarf wieder ein oder schließen Sie das Browserfenster"
+
 # general
 
 msgid "Actions"