1 files changed, 164 insertions, 0 deletions
diff --git a/synapse/handlers/search.py b/synapse/handlers/search.py
new file mode 100644
index 0000000000..d5c395061c
--- /dev/null
+++ b/synapse/handlers/search.py
@@ -0,0 +1,164 @@
+# -*- 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 ._base import BaseHandler
+
+from synapse.api.constants import (
+    EventTypes, KnownRoomEventKeys, Membership, SearchConstraintTypes
+)
+from synapse.api.errors import SynapseError
+from synapse.events.utils import serialize_event
+
+import logging
+
+
+logger = logging.getLogger(__name__)
+
+
+KEYS_TO_ALLOWED_CONSTRAINT_TYPES = {
+    KnownRoomEventKeys.CONTENT_BODY: [SearchConstraintTypes.FTS],
+    KnownRoomEventKeys.CONTENT_MSGTYPE: [SearchConstraintTypes.EXACT],
+    KnownRoomEventKeys.CONTENT_NAME: [
+        SearchConstraintTypes.FTS,
+        SearchConstraintTypes.EXACT,
+        SearchConstraintTypes.SUBSTRING,
+    ],
+    KnownRoomEventKeys.CONTENT_TOPIC: [SearchConstraintTypes.FTS],
+    KnownRoomEventKeys.SENDER: [SearchConstraintTypes.EXACT],
+    KnownRoomEventKeys.ORIGIN_SERVER_TS: [SearchConstraintTypes.RANGE],
+    KnownRoomEventKeys.ROOM_ID: [SearchConstraintTypes.EXACT],
+}
+
+
+class RoomConstraint(object):
+    def __init__(self, search_type, keys, value):
+        self.search_type = search_type
+        self.keys = keys
+        self.value = value
+
+    @classmethod
+    def from_dict(cls, d):
+        search_type = d["type"]
+        keys = d["keys"]
+
+        for key in keys:
+            if key not in KEYS_TO_ALLOWED_CONSTRAINT_TYPES:
+                raise SynapseError(400, "Unrecognized key %r", key)
+
+            if search_type not in KEYS_TO_ALLOWED_CONSTRAINT_TYPES[key]:
+                raise SynapseError(
+                    400,
+                    "Disallowed constraint type %r for key %r", search_type, key
+                )
+
+        return cls(search_type, keys, d["value"])
+
+
+class SearchHandler(BaseHandler):
+
+    def __init__(self, hs):
+        super(SearchHandler, self).__init__(hs)
+
+    @defer.inlineCallbacks
+    def _filter_events_for_client(self, user_id, events):
+        event_id_to_state = yield self.store.get_state_for_events(
+            frozenset(e.event_id for e in events),
+            types=(
+                (EventTypes.RoomHistoryVisibility, ""),
+                (EventTypes.Member, user_id),
+            )
+        )
+
+        def allowed(event, state):
+            if event.type == EventTypes.RoomHistoryVisibility:
+                return True
+
+            membership_ev = state.get((EventTypes.Member, user_id), None)
+            if membership_ev:
+                membership = membership_ev.membership
+            else:
+                membership = Membership.LEAVE
+
+            if membership == Membership.JOIN:
+                return True
+
+            history = state.get((EventTypes.RoomHistoryVisibility, ''), None)
+            if history:
+                visibility = history.content.get("history_visibility", "shared")
+            else:
+                visibility = "shared"
+
+            if visibility == "public":
+                return True
+            elif visibility == "shared":
+                return True
+            elif visibility == "joined":
+                return membership == Membership.JOIN
+            elif visibility == "invited":
+                return membership == Membership.INVITE
+
+            return True
+
+        defer.returnValue([
+            event
+            for event in events
+            if allowed(event, event_id_to_state[event.event_id])
+        ])
+
+    @defer.inlineCallbacks
+    def search(self, user, content):
+        constraint_dicts = content["search_categories"]["room_events"]["constraints"]
+        constraints = [RoomConstraint.from_dict(c)for c in constraint_dicts]
+
+        fts = False
+        for c in constraints:
+            if c.search_type == SearchConstraintTypes.FTS:
+                if fts:
+                    raise SynapseError(400, "Only one constraint can be FTS")
+                fts = True
+
+        rooms = yield self.store.get_rooms_for_user_where_membership_is(
+            user.to_string(), membership_list=[Membership.JOIN, Membership.LEAVE],
+        )
+        room_ids = set(r.room_id for r in rooms)
+
+        rank_map, event_map = yield self.store.search_msgs(room_ids, constraints)
+
+        allowed_events = yield self._filter_events_for_client(
+            user.to_string(), event_map.values()
+        )
+
+        time_now = self.clock.time_msec()
+
+        results = {
+            e.event_id: {
+                "rank": rank_map[e.event_id],
+                "result": serialize_event(e, time_now)
+            }
+            for e in allowed_events
+        }
+
+        logger.info("returning: %r", results)
+
+        defer.returnValue({
+            "search_categories": {
+                "room_events": {
+                    "results": results,
+                    "count": len(results)
+                }
+            }
+        })