Merge pull request #41 from matrix-org/client_v2_sync

Client v2 sync

1 files changed, 207 insertions, 0 deletions

diff --git a/synapse/rest/client/v2_alpha/sync.py b/synapse/rest/client/v2_alpha/sync.py
new file mode 100644
index 0000000000..81d5cf8ead
--- /dev/null
+++ b/synapse/rest/client/v2_alpha/sync.py
@@ -0,0 +1,207 @@
+# -*- coding: utf-8 -*-
+# Copyright 2015 OpenMarket Ltd
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from twisted.internet import defer
+
+from synapse.http.servlet import RestServlet
+from synapse.handlers.sync import SyncConfig
+from synapse.types import StreamToken
+from synapse.events.utils import (
+    serialize_event, format_event_for_client_v2_without_event_id,
+)
+from synapse.api.filtering import Filter
+from ._base import client_v2_pattern
+
+import logging
+
+logger = logging.getLogger(__name__)
+
+
+class SyncRestServlet(RestServlet):
+    """
+
+    GET parameters::
+        timeout(int): How long to wait for new events in milliseconds.
+        limit(int): Maxiumum number of events per room to return.
+        gap(bool): Create gaps the message history if limit is exceeded to
+            ensure that the client has the most recent messages. Defaults to
+            "true".
+        sort(str,str): tuple of sort key (e.g. "timeline") and direction
+            (e.g. "asc", "desc"). Defaults to "timeline,asc".
+        since(batch_token): Batch token when asking for incremental deltas.
+        set_presence(str): What state the device presence should be set to.
+            default is "online".
+        backfill(bool): Should the HS request message history from other
+            servers. This may take a long time making it unsuitable for clients
+            expecting a prompt response. Defaults to "true".
+        filter(filter_id): A filter to apply to the events returned.
+        filter_*: Filter override parameters.
+
+    Response JSON::
+        {
+            "next_batch": // batch token for the next /sync
+            "private_user_data": // private events for this user.
+            "public_user_data": // public events for all users including the
+                                // public events for this user.
+            "rooms": [{ // List of rooms with updates.
+                "room_id": // Id of the room being updated
+                "limited": // Was the per-room event limit exceeded?
+                "published": // Is the room published by our HS?
+                "event_map": // Map of EventID -> event JSON.
+                "events": { // The recent events in the room if gap is "true"
+                            // otherwise the next events in the room.
+                    "batch": [] // list of EventIDs in the "event_map".
+                    "prev_batch": // back token for getting previous events.
+                }
+                "state": [] // list of EventIDs updating the current state to
+                            // be what it should be at the end of the batch.
+                "ephemeral": []
+            }]
+        }
+    """
+
+    PATTERN = client_v2_pattern("/sync$")
+    ALLOWED_SORT = set(["timeline,asc", "timeline,desc"])
+    ALLOWED_PRESENCE = set(["online", "offline", "idle"])
+
+    def __init__(self, hs):
+        super(SyncRestServlet, self).__init__()
+        self.auth = hs.get_auth()
+        self.sync_handler = hs.get_handlers().sync_handler
+        self.clock = hs.get_clock()
+        self.filtering = hs.get_filtering()
+
+    @defer.inlineCallbacks
+    def on_GET(self, request):
+        user, client = yield self.auth.get_user_by_req(request)
+
+        timeout = self.parse_integer(request, "timeout", default=0)
+        limit = self.parse_integer(request, "limit", required=True)
+        gap = self.parse_boolean(request, "gap", default=True)
+        sort = self.parse_string(
+            request, "sort", default="timeline,asc",
+            allowed_values=self.ALLOWED_SORT
+        )
+        since = self.parse_string(request, "since")
+        set_presence = self.parse_string(
+            request, "set_presence", default="online",
+            allowed_values=self.ALLOWED_PRESENCE
+        )
+        backfill = self.parse_boolean(request, "backfill", default=False)
+        filter_id = self.parse_string(request, "filter", default=None)
+
+        logger.info(
+            "/sync: user=%r, timeout=%r, limit=%r, gap=%r, sort=%r, since=%r,"
+            " set_presence=%r, backfill=%r, filter_id=%r" % (
+                user, timeout, limit, gap, sort, since, set_presence,
+                backfill, filter_id
+            )
+        )
+
+        # TODO(mjark): Load filter and apply overrides.
+        try:
+            filter = yield self.filtering.get_user_filter(
+                user.localpart, filter_id
+            )
+        except:
+            filter = Filter({})
+        # filter = filter.apply_overrides(http_request)
+        #if filter.matches(event):
+        #   # stuff
+
+        sync_config = SyncConfig(
+            user=user,
+            client_info=client,
+            gap=gap,
+            limit=limit,
+            sort=sort,
+            backfill=backfill,
+            filter=filter,
+        )
+
+        if since is not None:
+            since_token = StreamToken.from_string(since)
+        else:
+            since_token = None
+
+        sync_result = yield self.sync_handler.wait_for_sync_for_user(
+            sync_config, since_token=since_token, timeout=timeout
+        )
+
+        time_now = self.clock.time_msec()
+
+        response_content = {
+            "public_user_data": self.encode_user_data(
+                sync_result.public_user_data, filter, time_now
+            ),
+            "private_user_data": self.encode_user_data(
+                sync_result.private_user_data, filter, time_now
+            ),
+            "rooms": self.encode_rooms(
+                sync_result.rooms, filter, time_now, client.token_id
+            ),
+            "next_batch": sync_result.next_batch.to_string(),
+        }
+
+        defer.returnValue((200, response_content))
+
+    def encode_user_data(self, events, filter, time_now):
+        return events
+
+    def encode_rooms(self, rooms, filter, time_now, token_id):
+        return [
+            self.encode_room(room, filter, time_now, token_id)
+            for room in rooms
+        ]
+
+    @staticmethod
+    def encode_room(room, filter, time_now, token_id):
+        event_map = {}
+        state_events = filter.filter_room_state(room.state)
+        recent_events = filter.filter_room_events(room.events)
+        state_event_ids = []
+        recent_event_ids = []
+        for event in state_events:
+            # TODO(mjark): Respect formatting requirements in the filter.
+            event_map[event.event_id] = serialize_event(
+                event, time_now, token_id=token_id,
+                event_format=format_event_for_client_v2_without_event_id,
+            )
+            state_event_ids.append(event.event_id)
+
+        for event in recent_events:
+            # TODO(mjark): Respect formatting requirements in the filter.
+            event_map[event.event_id] = serialize_event(
+                event, time_now, token_id=token_id,
+                event_format=format_event_for_client_v2_without_event_id,
+            )
+            recent_event_ids.append(event.event_id)
+        result = {
+            "room_id": room.room_id,
+            "event_map": event_map,
+            "events": {
+                "batch": recent_event_ids,
+                "prev_batch": room.prev_batch.to_string(),
+            },
+            "state": state_event_ids,
+            "limited": room.limited,
+            "published": room.published,
+            "ephemeral": room.ephemeral,
+        }
+        return result
+
+
+def register_servlets(hs, http_server):
+    SyncRestServlet(hs).register(http_server)