Merge pull request #2280 from matrix-org/erikj/share_room_user_dir

Include users who you share a room with in user directory

synapse/handlers/user_directory.py

@@ -14,12 +14,12 @@
 # limitations under the License.
 
 import logging
-
 from twisted.internet import defer
 
 from synapse.api.constants import EventTypes, JoinRules, Membership
 from synapse.storage.roommember import ProfileInfo
 from synapse.util.metrics import Measure
+from synapse.util.async import sleep
 
 
 logger = logging.getLogger(__name__)
@@ -41,12 +41,15 @@ class UserDirectoyHandler(object):
     one public room.
     """
 
+    INITIAL_SLEEP_MS = 50
+
     def __init__(self, hs):
         self.store = hs.get_datastore()
         self.state = hs.get_state_handler()
         self.server_name = hs.hostname
         self.clock = hs.get_clock()
         self.notifier = hs.get_notifier()
+        self.is_mine_id = hs.is_mine_id
 
         self.notifier.add_replication_callback(self.notify_new_event)
 
@@ -55,6 +58,9 @@ class UserDirectoyHandler(object):
         self.initially_handled_users = set()
         self.initially_handled_users_in_public = set()
 
+        self.initially_handled_users_share = set()
+        self.initially_handled_users_share_private_room = set()
+
         # The current position in the current_state_delta stream
         self.pos = None
 
@@ -65,7 +71,7 @@ class UserDirectoyHandler(object):
         # we start populating the user directory
         self.clock.call_later(0, self.notify_new_event)
 
-    def search_users(self, search_term, limit):
+    def search_users(self, user_id, search_term, limit):
         """Searches for users in directory
 
         Returns:
@@ -82,7 +88,7 @@ class UserDirectoyHandler(object):
                     ]
                 }
         """
-        return self.store.search_user_dir(search_term, limit)
+        return self.store.search_user_dir(user_id, search_term, limit)
 
     @defer.inlineCallbacks
     def notify_new_event(self):
@@ -140,10 +146,14 @@ class UserDirectoyHandler(object):
             logger.info("Handling room %d/%d", num_processed_rooms, len(room_ids))
             yield self._handle_intial_room(room_id)
             num_processed_rooms += 1
+            yield sleep(self.INITIAL_SLEEP_MS / 1000.)
 
         logger.info("Processed all rooms.")
 
         self.initially_handled_users = None
+        self.initially_handled_users_in_public = None
+        self.initially_handled_users_share = None
+        self.initially_handled_users_share_private_room = None
 
         yield self.store.update_user_directory_stream_pos(new_pos)
 
@@ -158,7 +168,8 @@ class UserDirectoyHandler(object):
         is_public = yield self.store.is_room_world_readable_or_publicly_joinable(room_id)
 
         users_with_profile = yield self.state.get_current_user_in_room(room_id)
-        unhandled_users = set(users_with_profile) - self.initially_handled_users
+        user_ids = set(users_with_profile)
+        unhandled_users = user_ids - self.initially_handled_users
 
         yield self.store.add_profiles_to_user_dir(
             room_id, {
@@ -175,6 +186,69 @@ class UserDirectoyHandler(object):
             )
             self.initially_handled_users_in_public != unhandled_users
 
+        # We now go and figure out the new users who share rooms with user entries
+        # We sleep aggressively here as otherwise it can starve resources.
+        # We also batch up inserts/updates, but try to avoid too many at once.
+        to_insert = set()
+        to_update = set()
+        count = 0
+        for user_id in user_ids:
+            if count % 100 == 0:
+                yield sleep(self.INITIAL_SLEEP_MS / 1000.)
+
+            if not self.is_mine_id(user_id):
+                count += 1
+                continue
+
+            for other_user_id in user_ids:
+                if user_id == other_user_id:
+                    continue
+
+                if count % 100 == 0:
+                    yield sleep(self.INITIAL_SLEEP_MS / 1000.)
+                count += 1
+
+                user_set = (user_id, other_user_id)
+
+                if user_set in self.initially_handled_users_share_private_room:
+                    continue
+
+                if user_set in self.initially_handled_users_share:
+                    if is_public:
+                        continue
+                    to_update.add(user_set)
+                else:
+                    to_insert.add(user_set)
+
+                if is_public:
+                    self.initially_handled_users_share.add(user_set)
+                else:
+                    self.initially_handled_users_share_private_room.add(user_set)
+
+                if len(to_insert) > 100:
+                    yield self.store.add_users_who_share_room(
+                        room_id, not is_public, to_insert,
+                    )
+                    to_insert.clear()
+
+                if len(to_update) > 100:
+                    yield self.store.update_users_who_share_room(
+                        room_id, not is_public, to_update,
+                    )
+                    to_update.clear()
+
+        if to_insert:
+            yield self.store.add_users_who_share_room(
+                room_id, not is_public, to_insert,
+            )
+            to_insert.clear()
+
+        if to_update:
+            yield self.store.update_users_who_share_room(
+                room_id, not is_public, to_update,
+            )
+            to_update.clear()
+
     @defer.inlineCallbacks
     def _handle_deltas(self, deltas):
         """Called with the state deltas to process
@@ -316,13 +390,78 @@ class UserDirectoyHandler(object):
             room_id
         )
 
-        if not is_public:
+        if is_public:
-            return
-
             row = yield self.store.get_user_in_public_room(user_id)
             if not row:
                 yield self.store.add_users_to_public_room(room_id, [user_id])
 
+        # Now we update users who share rooms with users. We do this by getting
+        # all the current users in the room and seeing which aren't already
+        # marked in the database as sharing with `user_id`
+
+        users_with_profile = yield self.state.get_current_user_in_room(room_id)
+
+        to_insert = set()
+        to_update = set()
+
+        # First, if they're our user then we need to update for every user
+        if self.is_mine_id(user_id):
+            # Returns a map of other_user_id -> shared_private. We only need
+            # to update mappings if for users that either don't share a room
+            # already (aren't in the map) or, if the room is private, those that
+            # only share a public room.
+            user_ids_shared = yield self.store.get_users_who_share_room_from_dir(
+                user_id
+            )
+
+            for other_user_id in users_with_profile:
+                if user_id == other_user_id:
+                    continue
+
+                shared_is_private = user_ids_shared.get(other_user_id)
+                if shared_is_private is True:
+                    # We've already marked in the database they share a private room
+                    continue
+                elif shared_is_private is False:
+                    # They already share a public room, so only update if this is
+                    # a private room
+                    if not is_public:
+                        to_update.add((user_id, other_user_id))
+                elif shared_is_private is None:
+                    # This is the first time they both share a room
+                    to_insert.add((user_id, other_user_id))
+
+        # Next we need to update for every local user in the room
+        for other_user_id in users_with_profile:
+            if user_id == other_user_id:
+                continue
+
+            if self.is_mine_id(other_user_id):
+                shared_is_private = yield self.store.get_if_users_share_a_room(
+                    other_user_id, user_id,
+                )
+                if shared_is_private is True:
+                    # We've already marked in the database they share a private room
+                    continue
+                elif shared_is_private is False:
+                    # They already share a public room, so only update if this is
+                    # a private room
+                    if not is_public:
+                        to_update.add((other_user_id, user_id))
+                elif shared_is_private is None:
+                    # This is the first time they both share a room
+                    to_insert.add((other_user_id, user_id))
+
+        if to_insert:
+            yield self.store.add_users_who_share_room(
+                room_id, not is_public, to_insert,
+            )
+
+        if to_update:
+            yield self.store.update_users_who_share_room(
+                room_id, not is_public, to_update,
+            )
+
     @defer.inlineCallbacks
     def _handle_remove_user(self, room_id, user_id):
         """Called when we might need to remove user to directory
@@ -339,13 +478,11 @@ class UserDirectoyHandler(object):
         row = yield self.store.get_user_in_public_room(user_id)
         update_user_in_public = row and row["room_id"] == room_id
 
-        if not update_user_in_public and not update_user_dir:
+        if (update_user_in_public or update_user_dir):
-            return
-
             # XXX: Make this faster?
             rooms = yield self.store.get_rooms_for_user(user_id)
             for j_room_id in rooms:
-            if not update_user_in_public and not update_user_dir:
+                if (not update_user_in_public and not update_user_dir):
                     break
 
                 is_in_room = yield self.store.is_host_joined(
@@ -359,12 +496,11 @@ class UserDirectoyHandler(object):
                     update_user_dir = False
                     yield self.store.update_user_in_user_dir(user_id, j_room_id)
 
-            if update_user_in_public:
                 is_public = yield self.store.is_room_world_readable_or_publicly_joinable(
                     j_room_id
                 )
 
-                if is_public:
+                if update_user_in_public and is_public:
                     yield self.store.update_user_in_public_user_list(user_id, j_room_id)
                     update_user_in_public = False
 
@@ -373,6 +509,46 @@ class UserDirectoyHandler(object):
         elif update_user_in_public:
             yield self.store.remove_from_user_in_public_room(user_id)
 
+        # Now handle users_who_share_rooms.
+
+        # Get a list of user tuples that were in the DB due to this room and
+        # users (this includes tuples where the other user matches `user_id`)
+        user_tuples = yield self.store.get_users_in_share_dir_with_room_id(
+            user_id, room_id,
+        )
+
+        for user_id, other_user_id in user_tuples:
+            # For each user tuple get a list of rooms that they still share,
+            # trying to find a private room, and update the entry in the DB
+            rooms = yield self.store.get_rooms_in_common_for_users(user_id, other_user_id)
+
+            # If they dont share a room anymore, remove the mapping
+            if not rooms:
+                yield self.store.remove_user_who_share_room(
+                    user_id, other_user_id,
+                )
+                continue
+
+            found_public_share = None
+            for j_room_id in rooms:
+                is_public = yield self.store.is_room_world_readable_or_publicly_joinable(
+                    j_room_id
+                )
+
+                if is_public:
+                    found_public_share = j_room_id
+                else:
+                    found_public_share = None
+                    yield self.store.update_users_who_share_room(
+                        room_id, not is_public, [(user_id, other_user_id)],
+                    )
+                    break
+
+            if found_public_share:
+                yield self.store.update_users_who_share_room(
+                    room_id, not is_public, [(user_id, other_user_id)],
+                )
+
     @defer.inlineCallbacks
     def _handle_profile_change(self, user_id, room_id, prev_event_id, event_id):
         """Check member event changes for any profile changes and update the

synapse/rest/client/v2_alpha/user_directory.py

@@ -55,7 +55,9 @@ class UserDirectorySearchRestServlet(RestServlet):
                     ]
                 }
         """
-        yield self.auth.get_user_by_req(request, allow_guest=False)
+        requester = yield self.auth.get_user_by_req(request, allow_guest=False)
+        user_id = requester.user.to_string()
+
         body = parse_json_object_from_request(request)
 
         limit = body.get("limit", 10)
@@ -66,7 +68,9 @@ class UserDirectorySearchRestServlet(RestServlet):
         except:
             raise SynapseError(400, "`search_term` is required field")
 
-        results = yield self.user_directory_handler.search_users(search_term, limit)
+        results = yield self.user_directory_handler.search_users(
+            user_id, search_term, limit,
+        )
 
         defer.returnValue((200, results))
 

synapse/storage/prepare_database.py

@@ -25,7 +25,7 @@ logger = logging.getLogger(__name__)
 
 # Remember to update this number every time a change is made to database
 # schema files, so the users will be informed on server restarts.
-SCHEMA_VERSION = 42
+SCHEMA_VERSION = 43
 
 dir_path = os.path.abspath(os.path.dirname(__file__))
 

synapse/storage/schema/delta/43/user_share.sql

@@ -0,0 +1,32 @@
+/* Copyright 2017 Vector Creations 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.
+ */
+
+-- Table keeping track of who shares a room with who. We only keep track
+-- of this for local users, so `user_id` is local users only (but we do keep track
+-- of which remote users share a room)
+CREATE TABLE users_who_share_rooms (
+    user_id TEXT NOT NULL,
+    other_user_id TEXT NOT NULL,
+    room_id TEXT NOT NULL,
+    share_private BOOLEAN NOT NULL  -- is the shared room private? i.e. they share a private room
+);
+
+
+CREATE UNIQUE INDEX users_who_share_rooms_u_idx ON users_who_share_rooms(user_id, other_user_id);
+CREATE INDEX users_who_share_rooms_r_idx ON users_who_share_rooms(room_id, user_id);
+
+
+-- Make sure that we popualte the table initially
+UPDATE user_directory_stream_pos SET stream_id = NULL;

synapse/storage/user_directory.py

@@ -16,16 +16,19 @@
 from twisted.internet import defer
 
 from ._base import SQLBaseStore
+
 from synapse.util.caches.descriptors import cached, cachedInlineCallbacks
 from synapse.api.constants import EventTypes, JoinRules
 from synapse.storage.engines import PostgresEngine, Sqlite3Engine
 from synapse.types import get_domain_from_id, get_localpart_from_id
 
 import re
+import logging
+
+logger = logging.getLogger(__name__)
 
 
 class UserDirectoryStore(SQLBaseStore):
-
     @cachedInlineCallbacks(cache_context=True)
     def is_room_world_readable_or_publicly_joinable(self, room_id, cache_context):
         """Check if the room is either world_readable or publically joinable
@@ -270,27 +273,240 @@ class UserDirectoryStore(SQLBaseStore):
             desc="get_users_in_public_due_to_room",
         )
 
+    @defer.inlineCallbacks
     def get_users_in_dir_due_to_room(self, room_id):
         """Get all user_ids that are in the room directory becuase they're
         in the given room_id
         """
-        return self._simple_select_onecol(
+        user_ids_dir = yield self._simple_select_onecol(
             table="user_directory",
             keyvalues={"room_id": room_id},
             retcol="user_id",
             desc="get_users_in_dir_due_to_room",
         )
 
-    def get_all_rooms(self):
+        user_ids_pub = yield self._simple_select_onecol(
-        """Get all room_ids we've ever known about
+            table="users_in_pubic_room",
-        """
+            keyvalues={"room_id": room_id},
-        return self._simple_select_onecol(
+            retcol="user_id",
-            table="current_state_events",
+            desc="get_users_in_dir_due_to_room",
-            keyvalues={},
-            retcol="DISTINCT room_id",
-            desc="get_all_rooms",
         )
 
+        user_ids_share = yield self._simple_select_onecol(
+            table="users_who_share_rooms",
+            keyvalues={"room_id": room_id},
+            retcol="user_id",
+            desc="get_users_in_dir_due_to_room",
+        )
+
+        user_ids = set(user_ids_dir)
+        user_ids.update(user_ids_pub)
+        user_ids.update(user_ids_share)
+
+        defer.returnValue(user_ids)
+
+    @defer.inlineCallbacks
+    def get_all_rooms(self):
+        """Get all room_ids we've ever known about, in ascending order of "size"
+        """
+        sql = """
+            SELECT room_id FROM current_state_events
+            GROUP BY room_id
+            ORDER BY count(*) ASC
+        """
+        rows = yield self._execute("get_all_rooms", None, sql)
+        defer.returnValue([room_id for room_id, in rows])
+
+    def add_users_who_share_room(self, room_id, share_private, user_id_tuples):
+        """Insert entries into the users_who_share_rooms table. The first
+        user should be a local user.
+
+        Args:
+            room_id (str)
+            share_private (bool): Is the room private
+            user_id_tuples([(str, str)]): iterable of 2-tuple of user IDs.
+        """
+        def _add_users_who_share_room_txn(txn):
+            self._simple_insert_many_txn(
+                txn,
+                table="users_who_share_rooms",
+                values=[
+                    {
+                        "user_id": user_id,
+                        "other_user_id": other_user_id,
+                        "room_id": room_id,
+                        "share_private": share_private,
+                    }
+                    for user_id, other_user_id in user_id_tuples
+                ],
+            )
+            for user_id, other_user_id in user_id_tuples:
+                txn.call_after(
+                    self.get_users_who_share_room_from_dir.invalidate,
+                    (user_id,),
+                )
+                txn.call_after(
+                    self.get_if_users_share_a_room.invalidate,
+                    (user_id, other_user_id),
+                )
+        return self.runInteraction(
+            "add_users_who_share_room", _add_users_who_share_room_txn
+        )
+
+    def update_users_who_share_room(self, room_id, share_private, user_id_sets):
+        """Updates entries in the users_who_share_rooms table. The first
+        user should be a local user.
+
+        Args:
+            room_id (str)
+            share_private (bool): Is the room private
+            user_id_tuples([(str, str)]): iterable of 2-tuple of user IDs.
+        """
+        def _update_users_who_share_room_txn(txn):
+            sql = """
+                UPDATE users_who_share_rooms
+                SET room_id = ?, share_private = ?
+                WHERE user_id = ? AND other_user_id = ?
+            """
+            txn.executemany(
+                sql,
+                (
+                    (room_id, share_private, uid, oid)
+                    for uid, oid in user_id_sets
+                )
+            )
+            for user_id, other_user_id in user_id_sets:
+                txn.call_after(
+                    self.get_users_who_share_room_from_dir.invalidate,
+                    (user_id,),
+                )
+                txn.call_after(
+                    self.get_if_users_share_a_room.invalidate,
+                    (user_id, other_user_id),
+                )
+        return self.runInteraction(
+            "update_users_who_share_room", _update_users_who_share_room_txn
+        )
+
+    def remove_user_who_share_room(self, user_id, other_user_id):
+        """Deletes entries in the users_who_share_rooms table. The first
+        user should be a local user.
+
+        Args:
+            room_id (str)
+            share_private (bool): Is the room private
+            user_id_tuples([(str, str)]): iterable of 2-tuple of user IDs.
+        """
+        def _remove_user_who_share_room_txn(txn):
+            self._simple_delete_txn(
+                txn,
+                table="users_who_share_rooms",
+                keyvalues={
+                    "user_id": user_id,
+                    "other_user_id": other_user_id,
+                },
+            )
+            txn.call_after(
+                self.get_users_who_share_room_from_dir.invalidate,
+                (user_id,),
+            )
+            txn.call_after(
+                self.get_if_users_share_a_room.invalidate,
+                (user_id, other_user_id),
+            )
+
+        return self.runInteraction(
+            "remove_user_who_share_room", _remove_user_who_share_room_txn
+        )
+
+    @cached(max_entries=500000)
+    def get_if_users_share_a_room(self, user_id, other_user_id):
+        """Gets if users share a room.
+
+        Args:
+            user_id (str): Must be a local user_id
+            other_user_id (str)
+
+        Returns:
+            bool|None: None if they don't share a room, otherwise whether they
+            share a private room or not.
+        """
+        return self._simple_select_one_onecol(
+            table="users_who_share_rooms",
+            keyvalues={
+                "user_id": user_id,
+                "other_user_id": other_user_id,
+            },
+            retcol="share_private",
+            allow_none=True,
+        )
+
+    @cachedInlineCallbacks(max_entries=500000, iterable=True)
+    def get_users_who_share_room_from_dir(self, user_id):
+        """Returns the set of users who share a room with `user_id`
+
+        Args:
+            user_id(str): Must be a local user
+
+        Returns:
+            dict: user_id -> share_private mapping
+        """
+        rows = yield self._simple_select_list(
+            table="users_who_share_rooms",
+            keyvalues={
+                "user_id": user_id,
+            },
+            retcols=("other_user_id", "share_private",),
+            desc="get_users_who_share_room_with_user",
+        )
+
+        defer.returnValue({
+            row["other_user_id"]: row["share_private"]
+            for row in rows
+        })
+
+    def get_users_in_share_dir_with_room_id(self, user_id, room_id):
+        """Get all user tuples that are in the users_who_share_rooms due to the
+        given room_id.
+
+        Returns:
+            [(user_id, other_user_id)]: where one of the two will match the given
+            user_id.
+        """
+        sql = """
+            SELECT user_id, other_user_id FROM users_who_share_rooms
+            WHERE room_id = ? AND (user_id = ? OR other_user_id = ?)
+        """
+        return self._execute(
+            "get_users_in_share_dir_with_room_id", None, sql, room_id, user_id, user_id
+        )
+
+    @defer.inlineCallbacks
+    def get_rooms_in_common_for_users(self, user_id, other_user_id):
+        """Given two user_ids find out the list of rooms they share.
+        """
+        sql = """
+            SELECT room_id FROM (
+                SELECT c.room_id FROM current_state_events AS c
+                INNER JOIN room_memberships USING (event_id)
+                WHERE type = 'm.room.member'
+                    AND membership = 'join'
+                    AND state_key = ?
+            ) AS f1 INNER JOIN (
+                SELECT c.room_id FROM current_state_events AS c
+                INNER JOIN room_memberships USING (event_id)
+                WHERE type = 'm.room.member'
+                    AND membership = 'join'
+                    AND state_key = ?
+            ) f2 USING (room_id)
+        """
+
+        rows = yield self._execute(
+            "get_rooms_in_common_for_users", None, sql, user_id, other_user_id
+        )
+
+        defer.returnValue([room_id for room_id, in rows])
+
     def delete_all_from_user_dir(self):
         """Delete the entire user directory
         """
@@ -298,8 +514,11 @@ class UserDirectoryStore(SQLBaseStore):
             txn.execute("DELETE FROM user_directory")
             txn.execute("DELETE FROM user_directory_search")
             txn.execute("DELETE FROM users_in_pubic_room")
+            txn.execute("DELETE FROM users_who_share_rooms")
             txn.call_after(self.get_user_in_directory.invalidate_all)
             txn.call_after(self.get_user_in_public_room.invalidate_all)
+            txn.call_after(self.get_users_who_share_room_from_dir.invalidate_all)
+            txn.call_after(self.get_if_users_share_a_room.invalidate_all)
         return self.runInteraction(
             "delete_all_from_user_dir", _delete_all_from_user_dir_txn
         )
@@ -392,7 +611,7 @@ class UserDirectoryStore(SQLBaseStore):
         )
 
     @defer.inlineCallbacks
-    def search_user_dir(self, search_term, limit):
+    def search_user_dir(self, user_id, search_term, limit):
         """Searches for users in directory
 
         Returns:
@@ -418,13 +637,23 @@ class UserDirectoryStore(SQLBaseStore):
             # The array of numbers are the weights for the various part of the
             # search: (domain, _, display name, localpart)
             sql = """
-                SELECT user_id, display_name, avatar_url
+                SELECT d.user_id, display_name, avatar_url
                 FROM user_directory_search
-                INNER JOIN user_directory USING (user_id)
+                INNER JOIN user_directory AS d USING (user_id)
-                INNER JOIN users_in_pubic_room USING (user_id)
+                LEFT JOIN users_in_pubic_room AS p USING (user_id)
-                WHERE vector @@ to_tsquery('english', ?)
+                LEFT JOIN (
+                    SELECT other_user_id AS user_id FROM users_who_share_rooms
+                    WHERE user_id = ? AND share_private
+                ) AS s USING (user_id)
+                WHERE
+                    (s.user_id IS NOT NULL OR p.user_id IS NOT NULL)
+                    AND vector @@ to_tsquery('english', ?)
                 ORDER BY
-                    2 * ts_rank_cd(
+                    (CASE WHEN s.user_id IS NOT NULL THEN 4.0 ELSE 1.0 END)
+                    * (CASE WHEN display_name IS NOT NULL THEN 1.2 ELSE 1.0 END)
+                    * (CASE WHEN avatar_url IS NOT NULL THEN 1.2 ELSE 1.0 END)
+                    * (
+                        3 * ts_rank_cd(
                             '{0.1, 0.1, 0.9, 1.0}',
                             vector,
                             to_tsquery('english', ?),
@@ -436,28 +665,35 @@ class UserDirectoryStore(SQLBaseStore):
                             to_tsquery('english', ?),
                             8
                         )
+                    )
                     DESC,
                     display_name IS NULL,
                     avatar_url IS NULL
                 LIMIT ?
             """
-            args = (full_query, exact_query, prefix_query, limit + 1,)
+            args = (user_id, full_query, exact_query, prefix_query, limit + 1,)
         elif isinstance(self.database_engine, Sqlite3Engine):
             search_query = _parse_query_sqlite(search_term)
 
             sql = """
-                SELECT user_id, display_name, avatar_url
+                SELECT d.user_id, display_name, avatar_url
                 FROM user_directory_search
-                INNER JOIN user_directory USING (user_id)
+                INNER JOIN user_directory AS d USING (user_id)
-                INNER JOIN users_in_pubic_room USING (user_id)
+                LEFT JOIN users_in_pubic_room AS p USING (user_id)
-                WHERE value MATCH ?
+                LEFT JOIN (
+                    SELECT other_user_id AS user_id FROM users_who_share_rooms
+                    WHERE user_id = ? AND share_private
+                ) AS s USING (user_id)
+                WHERE
+                    (s.user_id IS NOT NULL OR p.user_id IS NOT NULL)
+                    AND value MATCH ?
                 ORDER BY
                     rank(matchinfo(user_directory_search)) DESC,
                     display_name IS NULL,
                     avatar_url IS NULL
                 LIMIT ?
             """
-            args = (search_query, limit + 1)
+            args = (user_id, search_query, limit + 1)
         else:
             # This should be unreachable.
             raise Exception("Unrecognized database engine")