Initialise user displayname from SAML2 data (#4272)

When we register a new user from SAML2 data, initialise their displayname
correctly.

1 files changed, 16 insertions, 7 deletions

diff --git a/synapse/handlers/register.py b/synapse/handlers/register.py

index 0f87c4610e..ba39e67f6f 100644
--- a/synapse/handlers/register.py
+++ b/synapse/handlers/register.py
@@ -126,6 +126,7 @@ class RegistrationHandler(BaseHandler):
         make_guest=False,
         admin=False,
         threepid=None,
+        default_display_name=None,
     ):
         """Registers a new client on the server.
 
@@ -140,6 +141,8 @@ class RegistrationHandler(BaseHandler):
               since it offers no means of associating a device_id with the
               access_token. Instead you should call auth_handler.issue_access_token
               after registration.
+            default_display_name (unicode|None): if set, the new user's displayname
+              will be set to this. Defaults to 'localpart'.
         Returns:
             A tuple of (user_id, access_token).
         Raises:
@@ -169,6 +172,13 @@ class RegistrationHandler(BaseHandler):
             user = UserID(localpart, self.hs.hostname)
             user_id = user.to_string()
 
+            if was_guest:
+                # If the user was a guest then they already have a profile
+                default_display_name = None
+
+            elif default_display_name is None:
+                default_display_name = localpart
+
             token = None
             if generate_token:
                 token = self.macaroon_gen.generate_access_token(user_id)
@@ -178,10 +188,7 @@ class RegistrationHandler(BaseHandler):
                 password_hash=password_hash,
                 was_guest=was_guest,
                 make_guest=make_guest,
-                create_profile_with_localpart=(
-                    # If the user was a guest then they already have a profile
-                    None if was_guest else user.localpart
-                ),
+                create_profile_with_displayname=default_display_name,
                 admin=admin,
             )
 
@@ -203,13 +210,15 @@ class RegistrationHandler(BaseHandler):
                 yield self.check_user_id_not_appservice_exclusive(user_id)
                 if generate_token:
                     token = self.macaroon_gen.generate_access_token(user_id)
+                if default_display_name is None:
+                    default_display_name = localpart
                 try:
                     yield self.store.register(
                         user_id=user_id,
                         token=token,
                         password_hash=password_hash,
                         make_guest=make_guest,
-                        create_profile_with_localpart=user.localpart,
+                        create_profile_with_displayname=default_display_name,
                     )
                 except SynapseError:
                     # if user id is taken, just generate another
@@ -300,7 +309,7 @@ class RegistrationHandler(BaseHandler):
             user_id=user_id,
             password_hash="",
             appservice_id=service_id,
-            create_profile_with_localpart=user.localpart,
+            create_profile_with_displayname=user.localpart,
         )
         defer.returnValue(user_id)
 
@@ -478,7 +487,7 @@ class RegistrationHandler(BaseHandler):
                 user_id=user_id,
                 token=token,
                 password_hash=password_hash,
-                create_profile_with_localpart=user.localpart,
+                create_profile_with_displayname=user.localpart,
             )
         else:
             yield self._auth_handler.delete_access_tokens_for_user(user_id)