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-rw-r--r--synapse/handlers/_base.py24
-rw-r--r--synapse/handlers/federation.py99
-rw-r--r--synapse/handlers/room.py123
3 files changed, 168 insertions, 78 deletions
diff --git a/synapse/handlers/_base.py b/synapse/handlers/_base.py
index 3f07b5aa4a..85a0f5dff5 100644
--- a/synapse/handlers/_base.py
+++ b/synapse/handlers/_base.py
@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-
+from twisted.internet import defer
 
 class BaseHandler(object):
 
@@ -26,3 +26,25 @@ class BaseHandler(object):
         self.state_handler = hs.get_state_handler()
         self.distributor = hs.get_distributor()
         self.hs = hs
+
+
+class BaseRoomHandler(BaseHandler):
+
+    @defer.inlineCallbacks
+    def _on_new_room_event(self, event, snapshot, extra_destinations=[],
+                           extra_users=[]):
+        snapshot.fill_out_prev_events(event)
+
+        store_id = yield self.store.persist_event(event)
+
+        destinations = set(extra_destinations)
+        # Send a PDU to all hosts who have joined the room.
+        destinations.update((yield self.store.get_joined_hosts_for_room(
+            event.room_id
+        )))
+        event.destinations = list(destinations)
+
+        self.notifier.on_new_room_event(event, extra_users=[])
+
+        federation_handler = self.hs.get_handlers().federation_handler
+        yield federation_handler.handle_new_event(event, snapshot)
diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py
index 62edd5dbdc..9023c3d403 100644
--- a/synapse/handlers/federation.py
+++ b/synapse/handlers/federation.py
@@ -20,6 +20,9 @@ from ._base import BaseHandler
 from synapse.api.events.room import InviteJoinEvent, RoomMemberEvent
 from synapse.api.constants import Membership
 from synapse.util.logutils import log_function
+from synapse.federation.pdu_codec import PduCodec
+
+from synapse.api.errors import AuthError
 
 from twisted.internet import defer
 
@@ -30,8 +33,14 @@ logger = logging.getLogger(__name__)
 
 
 class FederationHandler(BaseHandler):
+    """Handles events that originated from federation.
+        Responsible for:
+        a) handling received Pdus before handing them on as Events to the rest
+        of the home server (including auth and state conflict resoultion)
+        b) converting events that were produced by local clients that may need
+        to be sent to remote home servers.
+    """
 
-    """Handles events that originated from federation."""
     def __init__(self, hs):
         super(FederationHandler, self).__init__(hs)
 
@@ -42,9 +51,67 @@ class FederationHandler(BaseHandler):
 
         self.waiting_for_join_list = {}
 
+        self.store = hs.get_datastore()
+        self.replication_layer = hs.get_replication_layer()
+        self.state_handler = hs.get_state_handler()
+        # self.auth_handler = gs.get_auth_handler()
+        self.server_name = hs.hostname
+
+        self.lock_manager = hs.get_room_lock_manager()
+
+        self.replication_layer.set_handler(self)
+
+        self.pdu_codec = PduCodec(hs)
+
     @log_function
     @defer.inlineCallbacks
-    def on_receive(self, event, is_new_state, backfilled):
+    def handle_new_event(self, event, snapshot):
+        """ Takes in an event from the client to server side, that has already
+        been authed and handled by the state module, and sends it to any
+        remote home servers that may be interested.
+
+        Args:
+            event
+            snapshot (.storage.Snapshot): THe snapshot the event happened after
+
+        Returns:
+            Deferred: Resolved when it has successfully been queued for
+            processing.
+        """
+
+        pdu = self.pdu_codec.pdu_from_event(event)
+
+        if not hasattr(pdu, "destinations") or not pdu.destinations:
+            pdu.destinations = []
+
+        yield self.replication_layer.send_pdu(pdu)
+
+    @log_function
+    def get_state_for_room(self, destination, room_id):
+        return self.replication_layer.get_state_for_context(
+            destination, room_id
+        )
+
+    @log_function
+    @defer.inlineCallbacks
+    def on_receive_pdu(self, pdu, backfilled):
+        """ Called by the ReplicationLayer when we have a new pdu. We need to
+        do auth checks and put it throught the StateHandler.
+        """
+        event = self.pdu_codec.event_from_pdu(pdu)
+
+        with (yield self.lock_manager.lock(pdu.context)):
+            if event.is_state and not backfilled:
+                is_new_state = yield self.state_handler.handle_new_state(
+                    pdu
+                )
+                if not is_new_state:
+                    return
+            else:
+                is_new_state = False
+        # TODO: Implement something in federation that allows us to
+        # respond to PDU.
+
         if hasattr(event, "state_key") and not is_new_state:
             logger.debug("Ignoring old state.")
             return
@@ -86,8 +153,7 @@ class FederationHandler(BaseHandler):
             if not room:
                 # Huh, let's try and get the current state
                 try:
-                    federation = self.hs.get_federation()
-                    yield federation.get_state_for_room(
+                    yield self.get_state_for_room(
                         event.origin, event.room_id
                     )
 
@@ -119,11 +185,10 @@ class FederationHandler(BaseHandler):
                     "user_joined_room", user=user, room_id=event.room_id
                 )
 
-
     @log_function
     @defer.inlineCallbacks
     def backfill(self, dest, room_id, limit):
-        events = yield self.hs.get_federation().backfill(dest, room_id, limit)
+        events = yield self._backfill(dest, room_id, limit)
 
         for event in events:
             try:
@@ -133,10 +198,23 @@ class FederationHandler(BaseHandler):
 
         defer.returnValue(events)
 
+    @defer.inlineCallbacks
+    def _backfill(self, dest, room_id, limit):
+        pdus = yield self.replication_layer.backfill(dest, room_id, limit)
+
+        if not pdus:
+            defer.returnValue([])
+
+        events = [
+            self.pdu_codec.event_from_pdu(pdu)
+            for pdu in pdus
+        ]
+
+        defer.returnValue(events)
+
     @log_function
     @defer.inlineCallbacks
-    def do_invite_join(self, target_host, room_id, joinee, content):
-        federation = self.hs.get_federation()
+    def do_invite_join(self, target_host, room_id, joinee, content, snapshot):
 
         hosts = yield self.store.get_joined_hosts_for_room(room_id)
         if self.hs.hostname in hosts:
@@ -146,7 +224,7 @@ class FederationHandler(BaseHandler):
 
         # First get current state to see if we are already joined.
         try:
-            yield federation.get_state_for_room(target_host, room_id)
+            yield self.get_state_for_room(target_host, room_id)
 
             hosts = yield self.store.get_joined_hosts_for_room(room_id)
             if self.hs.hostname in hosts:
@@ -166,7 +244,8 @@ class FederationHandler(BaseHandler):
 
         new_event.destinations = [target_host]
 
-        yield federation.handle_new_event(new_event)
+        snapshot.fill_out_prev_events(new_event)
+        yield self.handle_new_event(new_event, snapshot)
 
         # TODO (erikj): Time out here.
         d = defer.Deferred()
diff --git a/synapse/handlers/room.py b/synapse/handlers/room.py
index 760373344d..f01349b339 100644
--- a/synapse/handlers/room.py
+++ b/synapse/handlers/room.py
@@ -24,14 +24,14 @@ from synapse.api.events.room import (
 )
 from synapse.streams.config import PaginationConfig
 from synapse.util import stringutils
-from ._base import BaseHandler
+from ._base import BaseRoomHandler
 
 import logging
 
 logger = logging.getLogger(__name__)
 
 
-class MessageHandler(BaseHandler):
+class MessageHandler(BaseRoomHandler):
 
     def __init__(self, hs):
         super(MessageHandler, self).__init__(hs)
@@ -83,20 +83,12 @@ class MessageHandler(BaseHandler):
         if stamp_event:
             event.content["hsob_ts"] = int(self.clock.time_msec())
 
-        with (yield self.room_lock.lock(event.room_id)):
-            if not suppress_auth:
-                yield self.auth.check(event, raises=True)
+        snapshot = yield self.store.snapshot_room(event.room_id, event.user_id)
 
-            # store message in db
-            store_id = yield self.store.persist_event(event)
+        if not suppress_auth:
+            yield self.auth.check(event, snapshot, raises=True)
 
-            event.destinations = yield self.store.get_joined_hosts_for_room(
-                event.room_id
-            )
-
-            self.notifier.on_new_room_event(event)
-
-        yield self.hs.get_federation().handle_new_event(event)
+        yield self._on_new_room_event(event, snapshot)
 
     @defer.inlineCallbacks
     def get_messages(self, user_id=None, room_id=None, pagin_config=None,
@@ -144,23 +136,16 @@ class MessageHandler(BaseHandler):
             SynapseError if something went wrong.
         """
 
-        with (yield self.room_lock.lock(event.room_id)):
-            yield self.auth.check(event, raises=True)
+        snapshot = yield self.store.snapshot_room(event.room_id, event.user_id)
 
-            if stamp_event:
-                event.content["hsob_ts"] = int(self.clock.time_msec())
+        yield self.auth.check(event, snapshot, raises=True)
 
-            yield self.state_handler.handle_new_event(event)
-
-            # store in db
-            store_id = yield self.store.persist_event(event)
+        if stamp_event:
+            event.content["hsob_ts"] = int(self.clock.time_msec())
 
-            event.destinations = yield self.store.get_joined_hosts_for_room(
-                event.room_id
-            )
-            self.notifier.on_new_room_event(event)
+        yield self.state_handler.handle_new_event(event, snapshot)
 
-        yield self.hs.get_federation().handle_new_event(event)
+        yield self._on_new_room_event(event, snapshot)
 
     @defer.inlineCallbacks
     def get_room_data(self, user_id=None, room_id=None,
@@ -229,18 +214,12 @@ class MessageHandler(BaseHandler):
         if stamp_event:
             event.content["hsob_ts"] = int(self.clock.time_msec())
 
-        with (yield self.room_lock.lock(event.room_id)):
-            yield self.auth.check(event, raises=True)
-
-            # store message in db
-            store_id = yield self.store.persist_event(event)
+        snapshot = yield self.store.snapshot_room(event.room_id, event.user_id)
 
-            event.destinations = yield self.store.get_joined_hosts_for_room(
-                event.room_id
-            )
-        yield self.hs.get_federation().handle_new_event(event)
+        yield self.auth.check(event, snapshot, raises=True)
 
-        self.notifier.on_new_room_event(event)
+        # store message in db
+        yield self._on_new_room_event(event, snapshot)
 
     @defer.inlineCallbacks
     def snapshot_all_rooms(self, user_id=None, pagin_config=None,
@@ -324,7 +303,7 @@ class MessageHandler(BaseHandler):
         defer.returnValue(ret)
 
 
-class RoomCreationHandler(BaseHandler):
+class RoomCreationHandler(BaseRoomHandler):
 
     @defer.inlineCallbacks
     def create_room(self, user_id, room_id, config):
@@ -395,6 +374,13 @@ class RoomCreationHandler(BaseHandler):
             content=config,
         )
 
+        snapshot = yield self.store.snapshot_room(
+            room_id=room_id,
+            user_id=user_id,
+            state_type=RoomConfigEvent.TYPE,
+            state_key="",
+        )
+
         if room_alias:
             yield self.store.create_room_alias_association(
                 room_id=room_id,
@@ -402,9 +388,11 @@ class RoomCreationHandler(BaseHandler):
                 servers=[self.hs.hostname],
             )
 
-        yield self.state_handler.handle_new_event(config_event)
+        yield self.state_handler.handle_new_event(config_event, snapshot)
+        # store_id = persist...
 
-        yield self.hs.get_federation().handle_new_event(config_event)
+        federation_handler = self.hs.get_handlers().federation_handler
+        yield federation_handler.handle_new_event(config_event, snapshot)
 
         content = {"membership": Membership.JOIN}
         join_event = self.event_factory.create_event(
@@ -428,7 +416,7 @@ class RoomCreationHandler(BaseHandler):
         defer.returnValue(result)
 
 
-class RoomMemberHandler(BaseHandler):
+class RoomMemberHandler(BaseRoomHandler):
     # TODO(paul): This handler currently contains a messy conflation of
     #   low-level API that works on UserID objects and so on, and REST-level
     #   API that takes ID strings and returns pagination chunks. These concerns
@@ -539,6 +527,11 @@ 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
+        )
+        ## TODO(markjh): get prev state from snapshot.
         prev_state = yield self.store.get_room_member(
             target_user_id, event.room_id
         )
@@ -559,24 +552,22 @@ class RoomMemberHandler(BaseHandler):
         # if this HS is not currently in the room, i.e. we have to do the
         # invite/join dance.
         if event.membership == Membership.JOIN:
-            yield self._do_join(event, do_auth=do_auth)
+            yield self._do_join(event, snapshot, do_auth=do_auth)
         else:
             # This is not a JOIN, so we can handle it normally.
             if do_auth:
-                yield self.auth.check(event, raises=True)
+                yield self.auth.check(event, snapshot, raises=True)
 
-            prev_state = yield self.store.get_room_member(
-                target_user_id, event.room_id
-            )
             if prev_state and prev_state.membership == event.membership:
                 # double same action, treat this event as a NOOP.
                 defer.returnValue({})
                 return
 
-            yield self.state_handler.handle_new_event(event)
+            yield self.state_handler.handle_new_event(event, snapshot)
             yield self._do_local_membership_update(
                 event,
                 membership=event.content["membership"],
+                snapshot=snapshot,
             )
 
         defer.returnValue({"room_id": room_id})
@@ -606,12 +597,16 @@ class RoomMemberHandler(BaseHandler):
             content=content,
         )
 
-        yield self._do_join(new_event, room_host=host, do_auth=True)
+        snapshot = yield self.store.snapshot_room(
+            room_id, joinee, RoomMemberEvent.TYPE, joinee
+        )
+
+        yield self._do_join(new_event, snapshot, room_host=host, do_auth=True)
 
         defer.returnValue({"room_id": room_id})
 
     @defer.inlineCallbacks
-    def _do_join(self, event, room_host=None, do_auth=True):
+    def _do_join(self, event, snapshot, room_host=None, do_auth=True):
         joinee = self.hs.parse_userid(event.state_key)
         # room_id = RoomID.from_string(event.room_id, self.hs)
         room_id = event.room_id
@@ -633,6 +628,7 @@ class RoomMemberHandler(BaseHandler):
         elif room_host:
             should_do_dance = True
         else:
+            # TODO(markjh): get prev_state from snapshot
             prev_state = yield self.store.get_room_member(
                 joinee.to_string(), room_id
             )
@@ -652,7 +648,7 @@ class RoomMemberHandler(BaseHandler):
         if should_do_dance:
             handler = self.hs.get_handlers().federation_handler
             have_joined = yield handler.do_invite_join(
-                room_host, room_id, event.user_id, event.content
+                room_host, room_id, event.user_id, event.content, snapshot
             )
 
         # We want to do the _do_update inside the room lock.
@@ -660,12 +656,13 @@ class RoomMemberHandler(BaseHandler):
             logger.debug("Doing normal join")
 
             if do_auth:
-                yield self.auth.check(event, raises=True)
+                yield self.auth.check(event, snapshot, raises=True)
 
-            yield self.state_handler.handle_new_event(event)
+            yield self.state_handler.handle_new_event(event, snapshot)
             yield self._do_local_membership_update(
                 event,
                 membership=event.content["membership"],
+                snapshot=snapshot,
             )
 
         user = self.hs.parse_userid(event.user_id)
@@ -709,15 +706,8 @@ class RoomMemberHandler(BaseHandler):
 
         defer.returnValue([r.room_id for r in rooms])
 
-    @defer.inlineCallbacks
-    def _do_local_membership_update(self, event, membership):
-        # store membership
-        store_id = yield self.store.persist_event(event)
-
-        # Send a PDU to all hosts who have joined the room.
-        destinations = yield self.store.get_joined_hosts_for_room(
-            event.room_id
-        )
+    def _do_local_membership_update(self, event, membership, snapshot):
+        destinations = []
 
         # If we're inviting someone, then we should also send it to that
         # HS.
@@ -732,13 +722,12 @@ class RoomMemberHandler(BaseHandler):
             host = target_user.domain
             destinations.append(host)
 
-        event.destinations = list(set(destinations))
-
-        yield self.hs.get_federation().handle_new_event(event)
-        self.notifier.on_new_room_event(event, extra_users=[target_user])
-
+        return self._on_new_room_event(
+            event, snapshot, extra_destinations=destinations,
+            extra_users=[target_user]
+        )
 
-class RoomListHandler(BaseHandler):
+class RoomListHandler(BaseRoomHandler):
 
     @defer.inlineCallbacks
     def get_public_room_list(self):