Merge branch 'client_server_url_rename' into develop

14 files changed, 117 insertions, 170 deletions

diff --git a/cmdclient/console.py b/cmdclient/console.py
index 64557a4c40..0fbb822010 100755
--- a/cmdclient/console.py
+++ b/cmdclient/console.py
@@ -61,7 +61,7 @@ class SynapseCmd(cmd.Cmd):
             "send_delivery_receipts": "on"
         }
         self.path_prefix = "/matrix/client/api/v1"
-        self.event_stream_token = "START"
+        self.event_stream_token = "END"
         self.prompt = ">>> "
 
     def do_EOF(self, line):  # allows CTRL+D quitting
@@ -402,9 +402,7 @@ class SynapseCmd(cmd.Cmd):
         """Leaves a room: "leave <roomid>" """
         try:
             args = self._parse(line, ["roomid"], force_keys=True)
-            path = ("/rooms/%s/members/%s/state" %
-                    (urllib.quote(args["roomid"]), self._usr()))
-            reactor.callFromThread(self._run_and_pprint, "DELETE", path)
+            self._do_membership_change(args["roomid"], "leave", self._usr())
         except Exception as e:
             print e
 
@@ -567,7 +565,7 @@ class SynapseCmd(cmd.Cmd):
                                alt_text="Sent receipt for %s" % event["msg_id"])
 
     def _do_membership_change(self, roomid, membership, userid):
-        path = "/rooms/%s/members/%s/state" % (urllib.quote(roomid), userid)
+        path = "/rooms/%s/state/m.room.member/%s" % (urllib.quote(roomid), urllib.quote(userid))
         data = {
             "membership": membership
         }
diff --git a/synapse/api/auth.py b/synapse/api/auth.py
index 31852b29a5..385f93763a 100644
--- a/synapse/api/auth.py
+++ b/synapse/api/auth.py
@@ -44,15 +44,15 @@ class Auth(object):
             be raised only if raises=True.
         """
         try:
-            if event.type in [RoomTopicEvent.TYPE, MessageEvent.TYPE,
-                              FeedbackEvent.TYPE]:
-                yield self.check_joined_room(event.room_id, event.user_id)
-                defer.returnValue(True)
-            elif event.type == RoomMemberEvent.TYPE:
-                allowed = yield self.is_membership_change_allowed(event)
-                defer.returnValue(allowed)
+            if hasattr(event, "room_id"):
+                if event.type == RoomMemberEvent.TYPE:
+                    allowed = yield self.is_membership_change_allowed(event)
+                    defer.returnValue(allowed)
+                else:
+                    yield self.check_joined_room(event.room_id, event.user_id)
+                    defer.returnValue(True)
             else:
-                raise AuthError(500, "Unknown event type %s" % event.type)
+                raise AuthError(500, "Unknown event: %s" % event)
         except AuthError as e:
             logger.info("Event auth check failed on event %s with msg: %s",
                         event, e.msg)
@@ -77,6 +77,8 @@ class Auth(object):
 
     @defer.inlineCallbacks
     def is_membership_change_allowed(self, event):
+        target_user_id = event.state_key
+
         # does this room even exist
         room = yield self.store.get_room(event.room_id)
         if not room:
@@ -94,7 +96,7 @@ class Auth(object):
         # get info about the target
         try:
             target = yield self.store.get_room_member(
-                user_id=event.target_user_id,
+                user_id=target_user_id,
                 room_id=event.room_id)
         except:
             target = None
@@ -108,12 +110,12 @@ class Auth(object):
                 raise AuthError(403, "You are not in room %s." % event.room_id)
             elif target_in_room:  # the target is already in the room.
                 raise AuthError(403, "%s is already in the room." %
-                                     event.target_user_id)
+                                     target_user_id)
         elif Membership.JOIN == membership:
             # Joins are valid iff caller == target and they were:
             # invited: They are accepting the invitation
             # joined: It's a NOOP
-            if event.user_id != event.target_user_id:
+            if event.user_id != target_user_id:
                 raise AuthError(403, "Cannot force another user to join.")
             elif room.is_public:
                 pass  # anyone can join public rooms.
@@ -123,10 +125,10 @@ class Auth(object):
         elif Membership.LEAVE == membership:
             if not caller_in_room:  # trying to leave a room you aren't joined
                 raise AuthError(403, "You are not in room %s." % event.room_id)
-            elif event.target_user_id != event.user_id:
+            elif target_user_id != event.user_id:
                 # trying to force another user to leave
                 raise AuthError(403, "Cannot force %s to leave." %
-                                event.target_user_id)
+                                target_user_id)
         else:
             raise AuthError(500, "Unknown membership %s" % membership)
 
diff --git a/synapse/api/constants.py b/synapse/api/constants.py
index 1ff1af76ec..2af5424029 100644
--- a/synapse/api/constants.py
+++ b/synapse/api/constants.py
@@ -23,6 +23,7 @@ class Membership(object):
     JOIN = u"join"
     KNOCK = u"knock"
     LEAVE = u"leave"
+    LIST = (INVITE, JOIN, KNOCK, LEAVE)
 
 
 class Feedback(object):
diff --git a/synapse/api/events/room.py b/synapse/api/events/room.py
index 42459f3f21..2a7b5e8aba 100644
--- a/synapse/api/events/room.py
+++ b/synapse/api/events/room.py
@@ -13,6 +13,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from synapse.api.constants import Membership
+from synapse.api.errors import SynapseError
 from . import SynapseEvent
 
 
@@ -59,15 +61,15 @@ class RoomMemberEvent(SynapseEvent):
     TYPE = "m.room.member"
 
     valid_keys = SynapseEvent.valid_keys + [
-        "target_user_id",  # target
+        # target is the state_key
         "membership",  # action
     ]
 
     def __init__(self, **kwargs):
-        if "target_user_id" in kwargs:
-            kwargs["state_key"] = kwargs["target_user_id"]
         if "membership" not in kwargs:
             kwargs["membership"] = kwargs.get("content", {}).get("membership")
+        if not kwargs["membership"] in Membership.LIST:
+            raise SynapseError(400, "Bad membership value.")
         super(RoomMemberEvent, self).__init__(**kwargs)
 
     def get_content_template(self):
@@ -108,7 +110,7 @@ class InviteJoinEvent(SynapseEvent):
     TYPE = "m.room.invite_join"
 
     valid_keys = SynapseEvent.valid_keys + [
-        "target_user_id",
+        # target_user_id is the state_key
         "target_host",
     ]
 
diff --git a/synapse/api/notifier.py b/synapse/api/notifier.py
index 9f622df6bb..ec9c4e513d 100644
--- a/synapse/api/notifier.py
+++ b/synapse/api/notifier.py
@@ -56,11 +56,11 @@ class Notifier(object):
         # invites MUST prod the person being invited, who won't be in the room.
         if (event.type == RoomMemberEvent.TYPE and
                 event.content["membership"] == Membership.INVITE):
-            member_list.append(event.target_user_id)
+            member_list.append(event.state_key)
         # similarly, LEAVEs must be sent to the person leaving
         if (event.type == RoomMemberEvent.TYPE and
                 event.content["membership"] == Membership.LEAVE):
-            member_list.append(event.target_user_id)
+            member_list.append(event.state_key)
 
         for user_id in member_list:
             if user_id in self.stored_event_listeners:
diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py
index 9cff444779..16bac95331 100644
--- a/synapse/handlers/federation.py
+++ b/synapse/handlers/federation.py
@@ -65,7 +65,7 @@ class FederationHandler(BaseHandler):
             content.update({"membership": Membership.JOIN})
             new_event = self.event_factory.create_event(
                 etype=RoomMemberEvent.TYPE,
-                target_user_id=event.user_id,
+                state_key=event.user_id,
                 room_id=event.room_id,
                 user_id=event.user_id,
                 membership=Membership.JOIN,
diff --git a/synapse/handlers/room.py b/synapse/handlers/room.py
index 8ab0b8033e..5489de841f 100644
--- a/synapse/handlers/room.py
+++ b/synapse/handlers/room.py
@@ -399,7 +399,7 @@ class RoomCreationHandler(BaseHandler):
         content = {"membership": Membership.JOIN}
         join_event = self.event_factory.create_event(
             etype=RoomMemberEvent.TYPE,
-            target_user_id=user_id,
+            state_key=user_id,
             room_id=room_id,
             user_id=user_id,
             membership=Membership.JOIN,
@@ -527,9 +527,10 @@ class RoomMemberHandler(BaseHandler):
         Raises:
             SynapseError if there was a problem changing the membership.
         """
+        target_user_id = event.state_key
 
         prev_state = yield self.store.get_room_member(
-            event.target_user_id, event.room_id
+            target_user_id, event.room_id
         )
 
         if prev_state:
@@ -555,7 +556,7 @@ class RoomMemberHandler(BaseHandler):
                 yield self.auth.check(event, raises=True)
 
             prev_state = yield self.store.get_room_member(
-                event.target_user_id, event.room_id
+                target_user_id, event.room_id
             )
             if prev_state and prev_state.membership == event.membership:
                 # double same action, treat this event as a NOOP.
@@ -588,7 +589,7 @@ class RoomMemberHandler(BaseHandler):
         content.update({"membership": Membership.JOIN})
         new_event = self.event_factory.create_event(
             etype=RoomMemberEvent.TYPE,
-            target_user_id=joinee.to_string(),
+            state_key=joinee.to_string(),
             room_id=room_id,
             user_id=joinee.to_string(),
             membership=Membership.JOIN,
@@ -601,7 +602,7 @@ class RoomMemberHandler(BaseHandler):
 
     @defer.inlineCallbacks
     def _do_join(self, event, room_host=None, do_auth=True):
-        joinee = self.hs.parse_userid(event.target_user_id)
+        joinee = self.hs.parse_userid(event.state_key)
         # room_id = RoomID.from_string(event.room_id, self.hs)
         room_id = event.room_id
 
@@ -710,16 +711,17 @@ class RoomMemberHandler(BaseHandler):
 
         # If we're inviting someone, then we should also send it to that
         # HS.
+        target_user_id = event.state_key
         if membership == Membership.INVITE:
             host = UserID.from_string(
-                event.target_user_id, self.hs
+                target_user_id, self.hs
             ).domain
             destinations.append(host)
 
         # If we are joining a remote HS, include that.
         if membership == Membership.JOIN:
             host = UserID.from_string(
-                event.target_user_id, self.hs
+                target_user_id, self.hs
             ).domain
             destinations.append(host)
 
diff --git a/synapse/rest/room.py b/synapse/rest/room.py
index f5b547b963..2d681bd893 100644
--- a/synapse/rest/room.py
+++ b/synapse/rest/room.py
@@ -18,9 +18,10 @@ from twisted.internet import defer
 
 from base import RestServlet, client_path_pattern
 from synapse.api.errors import SynapseError, Codes
-from synapse.api.events.room import (RoomTopicEvent, MessageEvent,
-                                     RoomMemberEvent, FeedbackEvent)
-from synapse.api.constants import Feedback, Membership
+from synapse.api.events.room import (
+    MessageEvent, RoomMemberEvent, FeedbackEvent
+)
+from synapse.api.constants import Feedback
 from synapse.api.streams import PaginationConfig
 
 import json
@@ -95,46 +96,76 @@ class RoomCreateRestServlet(RestServlet):
         return (200, {})
 
 
-class RoomTopicRestServlet(RestServlet):
-    PATTERN = client_path_pattern("/rooms/(?P<room_id>[^/]*)/topic$")
+class RoomStateEventRestServlet(RestServlet):
+    def register(self, http_server):
+        # /room/$roomid/state/$eventtype
+        no_state_key = "/rooms/(?P<room_id>[^/]*)/state/(?P<event_type>[^/]*)$"
 
-    def get_event_type(self):
-        return RoomTopicEvent.TYPE
+        # /room/$roomid/state/$eventtype/$statekey
+        state_key = ("/rooms/(?P<room_id>[^/]*)/state/" +
+            "(?P<event_type>[^/]*)/(?P<state_key>[^/]*)$")
+
+        http_server.register_path("GET",
+                                  client_path_pattern(state_key),
+                                  self.on_GET)
+        http_server.register_path("PUT",
+                                  client_path_pattern(state_key),
+                                  self.on_PUT)
+        http_server.register_path("GET",
+                                  client_path_pattern(no_state_key),
+                                  self.on_GET_no_state_key)
+        http_server.register_path("PUT",
+                                  client_path_pattern(no_state_key),
+                                  self.on_PUT_no_state_key)
+
+    def on_GET_no_state_key(self, request, room_id, event_type):
+        return self.on_GET(request, room_id, event_type, "")
+
+    def on_PUT_no_state_key(self, request, room_id, event_type):
+        return self.on_PUT(request, room_id, event_type, "")
 
     @defer.inlineCallbacks
-    def on_GET(self, request, room_id):
+    def on_GET(self, request, room_id, event_type, state_key):
         user = yield self.auth.get_user_by_req(request)
 
         msg_handler = self.handlers.message_handler
         data = yield msg_handler.get_room_data(
             user_id=user.to_string(),
             room_id=urllib.unquote(room_id),
-            event_type=RoomTopicEvent.TYPE,
-            state_key="",
+            event_type=urllib.unquote(event_type),
+            state_key=urllib.unquote(state_key),
         )
 
         if not data:
-            raise SynapseError(404, "Topic not found.", errcode=Codes.NOT_FOUND)
-        defer.returnValue((200, data.content))
+            raise SynapseError(404, "Event not found.", errcode=Codes.NOT_FOUND)
+        defer.returnValue((200, data[0].get_dict()["content"]))
 
     @defer.inlineCallbacks
-    def on_PUT(self, request, room_id):
+    def on_PUT(self, request, room_id, event_type, state_key):
         user = yield self.auth.get_user_by_req(request)
+        event_type = urllib.unquote(event_type)
 
         content = _parse_json(request)
 
         event = self.event_factory.create_event(
-            etype=self.get_event_type(),
+            etype=event_type,
             content=content,
             room_id=urllib.unquote(room_id),
             user_id=user.to_string(),
+            state_key=urllib.unquote(state_key)
             )
-
-        msg_handler = self.handlers.message_handler
-        yield msg_handler.store_room_data(
-            event=event
-        )
-        defer.returnValue((200, ""))
+        if event_type == RoomMemberEvent.TYPE:
+            # membership events are special
+            handler = self.handlers.room_member_handler
+            yield handler.change_membership(event)
+            defer.returnValue((200, ""))
+        else:
+            # store random bits of state
+            msg_handler = self.handlers.message_handler
+            yield msg_handler.store_room_data(
+                event=event
+            )
+            defer.returnValue((200, ""))
 
 
 class JoinRoomAliasServlet(RestServlet):
@@ -157,73 +188,6 @@ class JoinRoomAliasServlet(RestServlet):
         defer.returnValue((200, ret_dict))
 
 
-class RoomMemberRestServlet(RestServlet):
-    PATTERN = client_path_pattern("/rooms/(?P<room_id>[^/]*)/members/"
-                                  + "(?P<target_user_id>[^/]*)/state$")
-
-    def get_event_type(self):
-        return RoomMemberEvent.TYPE
-
-    @defer.inlineCallbacks
-    def on_GET(self, request, room_id, target_user_id):
-        room_id = urllib.unquote(room_id)
-        user = yield self.auth.get_user_by_req(request)
-
-        handler = self.handlers.room_member_handler
-        member = yield handler.get_room_member(
-            room_id,
-            urllib.unquote(target_user_id),
-            user.to_string())
-        if not member:
-            raise SynapseError(404, "Member not found.",
-                               errcode=Codes.NOT_FOUND)
-        defer.returnValue((200, member.content))
-
-    @defer.inlineCallbacks
-    def on_DELETE(self, request, roomid, target_user_id):
-        user = yield self.auth.get_user_by_req(request)
-
-        event = self.event_factory.create_event(
-            etype=self.get_event_type(),
-            target_user_id=urllib.unquote(target_user_id),
-            room_id=urllib.unquote(roomid),
-            user_id=user.to_string(),
-            membership=Membership.LEAVE,
-            content={"membership": Membership.LEAVE}
-            )
-
-        handler = self.handlers.room_member_handler
-        yield handler.change_membership(event)
-        defer.returnValue((200, ""))
-
-    @defer.inlineCallbacks
-    def on_PUT(self, request, roomid, target_user_id):
-        user = yield self.auth.get_user_by_req(request)
-
-        content = _parse_json(request)
-        if "membership" not in content:
-            raise SynapseError(400, "No membership key.",
-                               errcode=Codes.BAD_JSON)
-
-        valid_membership_values = [Membership.JOIN, Membership.INVITE]
-        if (content["membership"] not in valid_membership_values):
-            raise SynapseError(400, "Membership value must be %s." % (
-                    valid_membership_values,), errcode=Codes.BAD_JSON)
-
-        event = self.event_factory.create_event(
-            etype=self.get_event_type(),
-            target_user_id=urllib.unquote(target_user_id),
-            room_id=urllib.unquote(roomid),
-            user_id=user.to_string(),
-            membership=content["membership"],
-            content=content
-            )
-
-        handler = self.handlers.room_member_handler
-        yield handler.change_membership(event)
-        defer.returnValue((200, ""))
-
-
 class MessageRestServlet(RestServlet):
     PATTERN = client_path_pattern("/rooms/(?P<room_id>[^/]*)/messages/"
                                   + "(?P<sender_id>[^/]*)/(?P<msg_id>[^/]*)$")
@@ -354,7 +318,8 @@ class RoomMemberListRestServlet(RestServlet):
             user_id=user.to_string())
 
         for event in members["chunk"]:
-            target_user = self.hs.parse_userid(event["target_user_id"])
+            # FIXME: should probably be state_key here, not user_id
+            target_user = self.hs.parse_userid(event["user_id"])
             # Presence is an optional cache; don't fail if we can't fetch it
             try:
                 presence_state = yield self.handlers.presence_handler.get_state(
@@ -400,6 +365,7 @@ class RoomTriggerBackfill(RestServlet):
         res = [event.get_dict() for event in events]
         defer.returnValue((200, res))
 
+
 def _parse_json(request):
     try:
         content = json.loads(request.content.read())
@@ -412,8 +378,7 @@ def _parse_json(request):
 
 
 def register_servlets(hs, http_server):
-    RoomTopicRestServlet(hs).register(http_server)
-    RoomMemberRestServlet(hs).register(http_server)
+    RoomStateEventRestServlet(hs).register(http_server)
     MessageRestServlet(hs).register(http_server)
     FeedbackRestServlet(hs).register(http_server)
     RoomCreateRestServlet(hs).register(http_server)
diff --git a/synapse/storage/roommember.py b/synapse/storage/roommember.py
index aca5cff737..a9a09e1425 100644
--- a/synapse/storage/roommember.py
+++ b/synapse/storage/roommember.py
@@ -35,13 +35,14 @@ class RoomMemberStore(SQLBaseStore):
     def _store_room_member(self, event):
         """Store a room member in the database.
         """
-        domain = self.hs.parse_userid(event.target_user_id).domain
+        target_user_id = event.state_key
+        domain = self.hs.parse_userid(target_user_id).domain
 
         yield self._simple_insert(
             "room_memberships",
             {
                 "event_id": event.event_id,
-                "user_id": event.target_user_id,
+                "user_id": target_user_id,
                 "sender": event.user_id,
                 "room_id": event.room_id,
                 "membership": event.membership,
diff --git a/webclient/components/matrix/event-handler-service.js b/webclient/components/matrix/event-handler-service.js
index b5eb73d92b..6ea0f58bc5 100644
--- a/webclient/components/matrix/event-handler-service.js
+++ b/webclient/components/matrix/event-handler-service.js
@@ -54,10 +54,6 @@ angular.module('eventHandlerService', [])
     }
     
     var handleMessage = function(event, isLiveEvent) {
-        if ("membership_target" in event.content) {
-            event.user_id = event.content.membership_target;
-        }
-        
         initRoom(event.room_id);
         
         if (isLiveEvent) {
diff --git a/webclient/components/matrix/matrix-service.js b/webclient/components/matrix/matrix-service.js
index d5738e01c8..b5b1815cf9 100644
--- a/webclient/components/matrix/matrix-service.js
+++ b/webclient/components/matrix/matrix-service.js
@@ -115,19 +115,7 @@ angular.module('matrixService', [])
 
         // Joins a room
         join: function(room_id) {
-            // The REST path spec
-            var path = "/rooms/$room_id/members/$user_id/state";
-
-            // Like the cmd client, escape room ids
-            room_id = encodeURIComponent(room_id);
-
-            // Customize it
-            path = path.replace("$room_id", room_id);
-            path = path.replace("$user_id", config.user_id);
-
-            return doRequest("PUT", path, undefined, {
-                 membership: "join"
-            });
+            return this.membershipChange(room_id, config.user_id, "join");
         },
 
         joinAlias: function(room_alias) {
@@ -141,34 +129,23 @@ angular.module('matrixService', [])
 
         // Invite a user to a room
         invite: function(room_id, user_id) {
-            // The REST path spec
-            var path = "/rooms/$room_id/members/$user_id/state";
-
-            // Like the cmd client, escape room ids
-            room_id = encodeURIComponent(room_id);
-
-            // Customize it
-            path = path.replace("$room_id", room_id);
-            path = path.replace("$user_id", user_id);
-
-            return doRequest("PUT", path, undefined, {
-                 membership: "invite"
-            });
+            return this.membershipChange(room_id, user_id, "invite");
         },
 
         // Leaves a room
         leave: function(room_id) {
-            // The REST path spec
-            var path = "/rooms/$room_id/members/$user_id/state";
-
-            // Like the cmd client, escape room ids
-            room_id = encodeURIComponent(room_id);
+            return this.membershipChange(room_id, config.user_id, "leave");
+        },
 
-            // Customize it
-            path = path.replace("$room_id", room_id);
-            path = path.replace("$user_id", config.user_id);
+        membershipChange: function(room_id, user_id, membershipValue) {
+            // The REST path spec
+            var path = "/rooms/$room_id/state/m.room.member/$user_id";
+            path = path.replace("$room_id", encodeURIComponent(room_id));
+            path = path.replace("$user_id", encodeURIComponent(user_id));
 
-            return doRequest("DELETE", path, undefined, undefined);
+            return doRequest("PUT", path, undefined, {
+                 membership: membershipValue
+            });
         },
 
         // Retrieves the room ID corresponding to a room alias
diff --git a/webclient/home/home-controller.js b/webclient/home/home-controller.js
index 35d0ef1654..a5576759fa 100644
--- a/webclient/home/home-controller.js
+++ b/webclient/home/home-controller.js
@@ -41,7 +41,7 @@ angular.module('HomeController', ['matrixService', 'mFileInput', 'mFileUpload',
     
     $scope.$on(eventHandlerService.MEMBER_EVENT, function(ngEvent, event, isLive) {
         var config = matrixService.config();
-        if (event.target_user_id === config.user_id && event.content.membership === "invite") {
+        if (event.state_key === config.user_id && event.content.membership === "invite") {
             console.log("Invited to room " + event.room_id);
             // FIXME push membership to top level key to match /im/sync
             event.membership = event.content.membership;
diff --git a/webclient/room/room-controller.js b/webclient/room/room-controller.js
index 3311618825..f49deaa489 100644
--- a/webclient/room/room-controller.js
+++ b/webclient/room/room-controller.js
@@ -154,7 +154,10 @@ angular.module('RoomController', ['ngSanitize', 'mUtilities'])
     var updateMemberList = function(chunk) {
         if (chunk.room_id != $scope.room_id) return;
 
-        var isNewMember = !(chunk.target_user_id in $scope.members);
+        // set target_user_id to keep things clear
+        var target_user_id = chunk.state_key;
+
+        var isNewMember = !(target_user_id in $scope.members);
         if (isNewMember) {
             // FIXME: why are we copying these fields around inside chunk?
             if ("state" in chunk.content) {
@@ -172,7 +175,7 @@ angular.module('RoomController', ['ngSanitize', 'mUtilities'])
             if ("avatar_url" in chunk.content) {
                 chunk.avatar_url = chunk.content.avatar_url;
             }
-            $scope.members[chunk.target_user_id] = chunk;
+            $scope.members[target_user_id] = chunk;
 
 /*
             // Stale code for explicitly hammering the homeserver for every displayname & avatar_url
@@ -202,13 +205,13 @@ angular.module('RoomController', ['ngSanitize', 'mUtilities'])
             });
 */            
 
-            if (chunk.target_user_id in $rootScope.presence) {
-                updatePresence($rootScope.presence[chunk.target_user_id]);
+            if (target_user_id in $rootScope.presence) {
+                updatePresence($rootScope.presence[target_user_id]);
             }
         }
         else {
             // selectively update membership else it will nuke the picture and displayname too :/
-            var member = $scope.members[chunk.target_user_id];
+            var member = $scope.members[target_user_id];
             member.content.membership = chunk.content.membership;
         }
     }
diff --git a/webclient/room/room.html b/webclient/room/room.html
index 06ca63d2ea..c167819f15 100644
--- a/webclient/room/room.html
+++ b/webclient/room/room.html
@@ -44,7 +44,7 @@
                         <span ng-hide='msg.type !== "m.room.member"'>
                             {{ members[msg.user_id].displayname || msg.user_id }}
                             {{ {"join": "joined", "leave": "left", "invite": "invited"}[msg.content.membership] }}
-                            {{ msg.content.target_id || '' }}
+                            {{ msg.content.membership === "invite" ? (msg.state_key || '') : '' }}
                         </span>
                         <span ng-hide='msg.content.msgtype !== "m.emote"' ng-bind-html="'* ' + (members[msg.user_id].displayname || msg.user_id) + ' ' + msg.content.body | linky:'_blank'"/>
                         <span ng-hide='msg.content.msgtype !== "m.text"' ng-bind-html="((msg.content.msgtype === 'm.text') ? msg.content.body : '') | linky:'_blank'"/>