Automatically invite a new registered user into public Matrix rooms

apps/registration/apps.py

@@ -9,7 +9,9 @@ class RegistrationConfig(AppConfig):
     name = 'registration'
 
     def ready(self):
-        from registration.signals import set_username, send_email_link, create_admin_registration
+        from registration.signals import create_admin_registration, invite_to_public_rooms, \
+            set_username, send_email_link
         pre_save.connect(set_username, "auth.User")
         pre_save.connect(send_email_link, "auth.User")
         post_save.connect(create_admin_registration, "auth.User")
+        post_save.connect(invite_to_public_rooms, "registration.Registration")

apps/registration/signals.py

@@ -1,6 +1,7 @@
 from corres2math.lists import get_sympa_client
 from django.contrib.auth.models import User
 
+from corres2math.matrix import Matrix
 from .models import AdminRegistration, Registration
 
 
@@ -38,3 +39,12 @@ def create_admin_registration(instance, **_):
     """
     if instance.is_superuser:
         AdminRegistration.objects.get_or_create(user=instance)
+
+
+def invite_to_public_rooms(instance: Registration, **_):
+    """
+    When a user got registered, automatically invite the Matrix user into public rooms.
+    """
+    if not instance.pk:
+        Matrix.invite("#annonces:correspondances-maths.fr", f"@{instance.matrix_username}:correspondances-maths.fr")
+        Matrix.invite("#faq:correspondances-maths.fr", f"@{instance.matrix_username}:correspondances-maths.fr")