Implement new replace_state and changed prev_state

`prev_state` is now a list of previous state ids, similiar to
prev_events. `replace_state` now points to what we think was replaced.

synapse/handlers/directory.py

@@ -147,10 +147,7 @@ class DirectoryHandler(BaseHandler):
             content={"aliases": aliases},
         )
 
-        snapshot = yield self.store.snapshot_room(
-            room_id=room_id,
-            user_id=user_id,
-        )
+        snapshot = yield self.store.snapshot_room(event)
 
         yield self._on_new_room_event(
             event, snapshot, extra_users=[user_id], suppress_auth=True

synapse/handlers/federation.py

@@ -313,9 +313,7 @@ class FederationHandler(BaseHandler):
             state_key=user_id,
         )
 
-        snapshot = yield self.store.snapshot_room(
-            event.room_id, event.user_id,
-        )
+        snapshot = yield self.store.snapshot_room(event)
         snapshot.fill_out_prev_events(event)
 
         yield self.state_handler.annotate_state_groups(event)

synapse/handlers/message.py

@@ -81,7 +81,7 @@ class MessageHandler(BaseHandler):
         user = self.hs.parse_userid(event.user_id)
         assert user.is_mine, "User must be our own: %s" % (user,)
 
-        snapshot = yield self.store.snapshot_room(event.room_id, event.user_id)
+        snapshot = yield self.store.snapshot_room(event)
 
         yield self._on_new_room_event(
             event, snapshot, suppress_auth=suppress_auth
@@ -141,12 +141,7 @@ class MessageHandler(BaseHandler):
             SynapseError if something went wrong.
         """
 
-        snapshot = yield self.store.snapshot_room(
-            event.room_id,
-            event.user_id,
-            state_type=event.type,
-            state_key=event.state_key,
-        )
+        snapshot = yield self.store.snapshot_room(event)
 
         yield self._on_new_room_event(event, snapshot)
 
@@ -214,7 +209,7 @@ class MessageHandler(BaseHandler):
 
     @defer.inlineCallbacks
     def send_feedback(self, event):
-        snapshot = yield self.store.snapshot_room(event.room_id, event.user_id)
+        snapshot = yield self.store.snapshot_room(event)
 
         # store message in db
         yield self._on_new_room_event(event, snapshot)

synapse/handlers/profile.py

@@ -17,7 +17,6 @@ from twisted.internet import defer
 
 from synapse.api.errors import SynapseError, AuthError, CodeMessageException
 from synapse.api.constants import Membership
-from synapse.api.events.room import RoomMemberEvent
 
 from ._base import BaseHandler
 
@@ -196,10 +195,7 @@ class ProfileHandler(BaseHandler):
         )
 
         for j in joins:
-            snapshot = yield self.store.snapshot_room(
-                j.room_id, j.state_key, RoomMemberEvent.TYPE,
-                j.state_key
-            )
+            snapshot = yield self.store.snapshot_room(j)
 
             content = {
                 "membership": j.content["membership"],

synapse/handlers/room.py

@@ -122,10 +122,7 @@ class RoomCreationHandler(BaseHandler):
 
         @defer.inlineCallbacks
         def handle_event(event):
-            snapshot = yield self.store.snapshot_room(
-                room_id=room_id,
-                user_id=user_id,
-            )
+            snapshot = yield self.store.snapshot_room(event)
 
             logger.debug("Event: %s", event)
 
@@ -364,10 +361,8 @@ class RoomMemberHandler(BaseHandler):
         """
         target_user_id = event.state_key
 
-        snapshot = yield self.store.snapshot_room(
-            event.room_id, event.user_id,
-            RoomMemberEvent.TYPE, target_user_id
-        )
+        snapshot = yield self.store.snapshot_room(event)
+
         ## TODO(markjh): get prev state from snapshot.
         prev_state = yield self.store.get_room_member(
             target_user_id, event.room_id
@@ -442,10 +437,7 @@ class RoomMemberHandler(BaseHandler):
             content=content,
         )
 
-        snapshot = yield self.store.snapshot_room(
-            room_id, joinee.to_string(), RoomMemberEvent.TYPE,
-            joinee.to_string()
-        )
+        snapshot = yield self.store.snapshot_room(new_event)
 
         yield self._do_join(new_event, snapshot, room_host=host, do_auth=True)