Add an email pusher for new users

If they registered with an email address and email notifs are enabled on the HS

synapse/push/pusherpool.py

@@ -50,6 +50,7 @@ class PusherPool:
         # recreated, added and started: this means we have only one
         # code path adding pushers.
         pusher.create_pusher(self.hs, {
+            "id": None,
             "user_name": user_id,
             "kind": kind,
             "app_id": app_id,

synapse/rest/client/v2_alpha/register.py

@@ -48,6 +48,7 @@ class RegisterRestServlet(RestServlet):
         super(RegisterRestServlet, self).__init__()
         self.hs = hs
         self.auth = hs.get_auth()
+        self.store = hs.get_datastore()
         self.auth_handler = hs.get_handlers().auth_handler
         self.registration_handler = hs.get_handlers().registration_handler
         self.identity_handler = hs.get_handlers().identity_handler
@@ -214,6 +215,31 @@ class RegisterRestServlet(RestServlet):
                         threepid['validated_at'],
                     )
 
+                    # And we add an email pusher for them by default, but only
+                    # if email notifications are enabled (so people don't start
+                    # getting mail spam where they weren't before if email
+                    # notifs are set up on a home server)
+                    if self.hs.config.email_enable_notifs:
+                        # Pull the ID of the access token back out of the db
+                        # It would really make more sense for this to be passed
+                        # up when the access token is saved, but that's quite an
+                        # invasive change I'd rather do separately.
+                        user_tuple = yield self.store.get_user_by_access_token(
+                            token
+                        )
+
+                        yield self.hs.get_pusherpool().add_pusher(
+                            user_id=user_id,
+                            access_token=user_tuple["token_id"],
+                            kind="email",
+                            app_id="m.email",
+                            app_display_name="Email Notifications",
+                            device_display_name=threepid["address"],
+                            pushkey=threepid["address"],
+                            lang=None,  # We don't know a user's language here
+                            data={},
+                        )
+
             if 'bind_email' in params and params['bind_email']:
                 logger.info("bind_email specified: binding")