Add setting to disable registration

shiftregister/app/dynamic_preferences_registry.py

@@ -56,3 +56,10 @@ class SMSRate(types.IntegerPreference):
     name = "sms_rate"
     default = 2
     help_text = "Number of SMS sent per minute"
+
+
+@global_preferences_registry.register
+class EnableRegistration(types.BooleanPreference):
+    section = helper
+    name = "enable_registration"
+    default = True

shiftregister/app/views.py

@@ -119,7 +119,13 @@ def register(request):
         return redirect("index")
 
     context = {}
-    if request.method == "POST":
+    if not global_preferences["helper__enable_registration"]:
+        messages.add_message(
+            request,
+            messages.WARNING if request.method == "POST" else messages.INFO,
+            "Aktuell ist es leider nicht möglich, sich für die Helfer*innen zu registrieren. Bitte komm später wieder.",
+        )
+    elif request.method == "POST":
         form = RegisterForm(request.POST)
         if not form.is_valid():
             context["form"] = form