1 files changed, 53 insertions, 12 deletions

diff --git a/synapse/handlers/device.py b/synapse/handlers/device.py
index aa68755936..d92780b642 100644
--- a/synapse/handlers/device.py
+++ b/synapse/handlers/device.py
@@ -15,6 +15,7 @@
 
 from synapse.api import errors
 from synapse.util import stringutils
+from synapse.types import get_domain_from_id
 from twisted.internet import defer
 from ._base import BaseHandler
 
@@ -27,6 +28,8 @@ class DeviceHandler(BaseHandler):
     def __init__(self, hs):
         super(DeviceHandler, self).__init__(hs)
 
+        self.state = hs.get_state_handler()
+
     @defer.inlineCallbacks
     def check_device_registered(self, user_id, device_id,
                                 initial_device_display_name=None):
@@ -45,29 +48,29 @@ class DeviceHandler(BaseHandler):
             str: device id (generated if none was supplied)
         """
         if device_id is not None:
-            yield self.store.store_device(
+            new_device = yield self.store.store_device(
                 user_id=user_id,
                 device_id=device_id,
                 initial_device_display_name=initial_device_display_name,
-                ignore_if_known=True,
             )
+            if new_device:
+                yield self.notify_device_update(user_id, device_id)
             defer.returnValue(device_id)
 
         # if the device id is not specified, we'll autogen one, but loop a few
         # times in case of a clash.
         attempts = 0
         while attempts < 5:
-            try:
-                device_id = stringutils.random_string(10).upper()
-                yield self.store.store_device(
-                    user_id=user_id,
-                    device_id=device_id,
-                    initial_device_display_name=initial_device_display_name,
-                    ignore_if_known=False,
-                )
+            device_id = stringutils.random_string(10).upper()
+            new_device = yield self.store.store_device(
+                user_id=user_id,
+                device_id=device_id,
+                initial_device_display_name=initial_device_display_name,
+            )
+            if new_device:
+                yield self.notify_device_update(user_id, device_id)
                 defer.returnValue(device_id)
-            except errors.StoreError:
-                attempts += 1
+            attempts += 1
 
         raise errors.StoreError(500, "Couldn't generate a device ID.")
 
@@ -147,6 +150,8 @@ class DeviceHandler(BaseHandler):
             user_id=user_id, device_id=device_id
         )
 
+        yield self.notify_device_update(user_id, device_id)
+
     @defer.inlineCallbacks
     def update_device(self, user_id, device_id, content):
         """ Update the given device
@@ -166,12 +171,48 @@ class DeviceHandler(BaseHandler):
                 device_id,
                 new_display_name=content.get("display_name")
             )
+            yield self.notify_device_update(user_id, device_id)
         except errors.StoreError, e:
             if e.code == 404:
                 raise errors.NotFoundError()
             else:
                 raise
 
+    @defer.inlineCallbacks
+    def notify_device_update(self, user_id, device_id):
+        rooms = yield self.store.get_rooms_for_user(user_id)
+        room_ids = [r.room_id for r in rooms]
+
+        hosts = set()
+        for room_id in room_ids:
+            users = yield self.state.get_current_user_in_room(room_id)
+            hosts.update(get_domain_from_id(u) for u in users)
+        hosts.discard(self.server_name)
+
+        position = yield self.store.add_device_change_to_streams(
+            user_id, device_id, list(hosts)
+        )
+
+        yield self.notifier.on_new_event(
+            "device_list_key", position, rooms=room_ids,
+        )
+
+        for host in hosts:
+            self.federation.send_device_messages(host)
+
+    @defer.inlineCallbacks
+    def get_device_list_changes(self, user_id, room_ids, from_key):
+        room_ids = frozenset(room_ids)
+
+        user_ids_changed = set()
+        changed = yield self.store.get_user_whose_devices_changed(from_key)
+        for other_user_id in changed:
+            other_rooms = yield self.store.get_rooms_for_user(other_user_id)
+            if room_ids.intersection(e.room_id for e in other_rooms):
+                user_ids_changed.add(other_user_id)
+
+        defer.returnValue(user_ids_changed)
+
 
 def _update_device_from_client_ips(device, client_ips):
     ip = client_ips.get((device["user_id"], device["device_id"]), {})