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-rw-r--r--synapse/handlers/register.py20
1 files changed, 20 insertions, 0 deletions
diff --git a/synapse/handlers/register.py b/synapse/handlers/register.py
index 66a89c10b2..0247327eb9 100644
--- a/synapse/handlers/register.py
+++ b/synapse/handlers/register.py
@@ -99,6 +99,26 @@ class RegistrationHandler(BaseHandler):
                         raise RegistrationError(
                             500, "Cannot generate user ID.")
 
+        # create a default avatar for the user
+        # XXX: ideally clients would explicitly specify one, but given they don't
+        # and we want consistent and pretty identicons for random users, we'll
+        # do it here.
+        try:
+            auth_user = UserID.from_string(user_id)
+            media_repository = self.hs.get_resource_for_media_repository()
+            identicon_resource = media_repository.getChildWithDefault("identicon", None)
+            upload_resource = media_repository.getChildWithDefault("upload", None)
+            identicon_bytes = identicon_resource.generate_identicon(user_id, 320, 320)
+            content_uri = yield upload_resource.create_content(
+                "image/png", None, identicon_bytes, len(identicon_bytes), auth_user
+            )
+            profile_handler = self.hs.get_handlers().profile_handler
+            profile_handler.set_avatar_url(
+                auth_user, auth_user, ("%s#auto" % (content_uri,))
+            )
+        except NotImplementedError:
+            pass  # make tests pass without messing around creating default avatars
+
         defer.returnValue((user_id, token))
 
     @defer.inlineCallbacks