feat: Add automatic room joining for new users

Introduces automatic room joining upon user registration.
Updates configuration to include a list of rooms for auto-join.
Enhances user onboarding experience by simplifying setup.

Addresses onboarding workflow.

config.dist.yaml

@@ -12,4 +12,6 @@ email:
   tls: true
 admin:
   email: admin@your.server
-trust_proxy: false
+trust_proxy: false
+auto_join:
+  - "!your_room_id:your.server"

src/synapse_registration/registration/signals.py

@@ -49,6 +49,13 @@ def handle_status_change(sender, instance, created, **kwargs):
                 headers={"Authorization": f"Bearer {settings.SYNAPSE_ADMIN_TOKEN}"},
             )
 
+            for room in settings.AUTO_JOIN:
+                response = requests.post(
+                    f"{settings.SYNAPSE_SERVER}/_synapse/admin/v1/join/{room}",
+                    json={"user_id": f"@{instance.username}:{settings.MATRIX_DOMAIN}"},
+                    headers={"Authorization": f"Bearer {settings.SYNAPSE_ADMIN_TOKEN}"},
+                )
+
             if response.status_code != 200:
                 send_mail(
                     "Deactivation Failed",

src/synapse_registration/registration/views.py

@@ -144,12 +144,14 @@ class CompleteRegistrationView(FormView):
             registration.status = UserRegistration.STATUS_REQUESTED
             registration.registration_reason = registration_reason
             registration.save()
+
             send_mail(
                 "New Registration Request",
                 f"Approve the new user {username}",
                 settings.DEFAULT_FROM_EMAIL,
                 [settings.ADMIN_EMAIL],
             )
+
             return render(self.request, "registration/registration_pending.html")
 
         form.add_error(None, "Registration failed.")

src/synapse_registration/synapse_registration/settings.py

@@ -69,6 +69,11 @@ SYNAPSE_SERVER = config["synapse"]["server"]
 SYNAPSE_ADMIN_TOKEN = config["synapse"]["admin_token"]
 MATRIX_DOMAIN = config["synapse"]["domain"]
 
+if "auto_join" in config:
+    AUTO_JOIN = config["auto_join"]
+else:
+    AUTO_JOIN = []
+
 response = requests.get(
     f"{SYNAPSE_SERVER}/_matrix/client/r0/account/whoami",
     headers={"Authorization": f"Bearer {SYNAPSE_ADMIN_TOKEN}"},