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354 lines
13 KiB
Go
354 lines
13 KiB
Go
// Copyright 2017-2018 New Vector Ltd
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// Copyright 2019-2020 The Matrix.org Foundation C.I.C.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package sqlite3
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import (
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"context"
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"database/sql"
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"fmt"
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"strings"
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"github.com/matrix-org/dendrite/internal"
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"github.com/matrix-org/dendrite/internal/sqlutil"
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"github.com/matrix-org/dendrite/roomserver/storage/tables"
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"github.com/matrix-org/dendrite/roomserver/types"
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"github.com/matrix-org/gomatrixserverlib"
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)
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const membershipSchema = `
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CREATE TABLE IF NOT EXISTS roomserver_membership (
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room_nid INTEGER NOT NULL,
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target_nid INTEGER NOT NULL,
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sender_nid INTEGER NOT NULL DEFAULT 0,
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membership_nid INTEGER NOT NULL DEFAULT 1,
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event_nid INTEGER NOT NULL DEFAULT 0,
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target_local BOOLEAN NOT NULL DEFAULT false,
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forgotten BOOLEAN NOT NULL DEFAULT false,
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UNIQUE (room_nid, target_nid)
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);
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`
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var selectJoinedUsersSetForRoomsSQL = "" +
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"SELECT target_nid, COUNT(room_nid) FROM roomserver_membership WHERE room_nid IN ($1) AND" +
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" membership_nid = " + fmt.Sprintf("%d", tables.MembershipStateJoin) + " and forgotten = false" +
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" GROUP BY target_nid"
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// Insert a row in to membership table so that it can be locked by the
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// SELECT FOR UPDATE
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const insertMembershipSQL = "" +
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"INSERT INTO roomserver_membership (room_nid, target_nid, target_local)" +
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" VALUES ($1, $2, $3)" +
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" ON CONFLICT DO NOTHING"
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const selectMembershipFromRoomAndTargetSQL = "" +
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"SELECT membership_nid, event_nid, forgotten FROM roomserver_membership" +
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" WHERE room_nid = $1 AND target_nid = $2"
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const selectMembershipsFromRoomAndMembershipSQL = "" +
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"SELECT event_nid FROM roomserver_membership" +
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" WHERE room_nid = $1 AND membership_nid = $2 and forgotten = false"
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const selectLocalMembershipsFromRoomAndMembershipSQL = "" +
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"SELECT event_nid FROM roomserver_membership" +
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" WHERE room_nid = $1 AND membership_nid = $2" +
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" AND target_local = true and forgotten = false"
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const selectMembershipsFromRoomSQL = "" +
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"SELECT event_nid FROM roomserver_membership" +
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" WHERE room_nid = $1 and forgotten = false"
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const selectLocalMembershipsFromRoomSQL = "" +
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"SELECT event_nid FROM roomserver_membership" +
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" WHERE room_nid = $1" +
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" AND target_local = true and forgotten = false"
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const selectMembershipForUpdateSQL = "" +
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"SELECT membership_nid FROM roomserver_membership" +
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" WHERE room_nid = $1 AND target_nid = $2"
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const updateMembershipSQL = "" +
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"UPDATE roomserver_membership SET sender_nid = $1, membership_nid = $2, event_nid = $3, forgotten = $4" +
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" WHERE room_nid = $5 AND target_nid = $6"
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const updateMembershipForgetRoom = "" +
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"UPDATE roomserver_membership SET forgotten = $1" +
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" WHERE room_nid = $2 AND target_nid = $3"
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const selectRoomsWithMembershipSQL = "" +
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"SELECT room_nid FROM roomserver_membership WHERE membership_nid = $1 AND target_nid = $2 and forgotten = false"
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// selectKnownUsersSQL uses a sub-select statement here to find rooms that the user is
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// joined to. Since this information is used to populate the user directory, we will
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// only return users that the user would ordinarily be able to see anyway.
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var selectKnownUsersSQL = "" +
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"SELECT DISTINCT event_state_key FROM roomserver_membership INNER JOIN roomserver_event_state_keys ON " +
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"roomserver_membership.target_nid = roomserver_event_state_keys.event_state_key_nid" +
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" WHERE room_nid IN (" +
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" SELECT DISTINCT room_nid FROM roomserver_membership WHERE target_nid=$1 AND membership_nid = " + fmt.Sprintf("%d", tables.MembershipStateJoin) +
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") AND membership_nid = " + fmt.Sprintf("%d", tables.MembershipStateJoin) + " AND event_state_key LIKE $2 LIMIT $3"
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// selectLocalServerInRoomSQL is an optimised case for checking if we, the local server,
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// are in the room by using the target_local column of the membership table. Normally when
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// we want to know if a server is in a room, we have to unmarshal the entire room state which
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// is expensive. The presence of a single row from this query suggests we're still in the
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// room, no rows returned suggests we aren't.
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const selectLocalServerInRoomSQL = "" +
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"SELECT room_nid FROM roomserver_membership WHERE target_local = 1 AND membership_nid = $1 AND room_nid = $2 LIMIT 1"
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// selectServerMembersInRoomSQL is an optimised case for checking for server members in a room.
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// The JOIN is significantly leaner than the previous case of looking up event NIDs and reading the
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// membership events from the database, as the JOIN query amounts to little more than two index
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// scans which are very fast. The presence of a single row from this query suggests the server is
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// in the room, no rows returned suggests they aren't.
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const selectServerInRoomSQL = "" +
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"SELECT room_nid FROM roomserver_membership" +
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" JOIN roomserver_event_state_keys ON roomserver_membership.target_nid = roomserver_event_state_keys.event_state_key_nid" +
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" WHERE membership_nid = $1 AND room_nid = $2 AND event_state_key LIKE '%:' || $3 LIMIT 1"
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type membershipStatements struct {
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db *sql.DB
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insertMembershipStmt *sql.Stmt
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selectMembershipForUpdateStmt *sql.Stmt
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selectMembershipFromRoomAndTargetStmt *sql.Stmt
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selectMembershipsFromRoomAndMembershipStmt *sql.Stmt
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selectLocalMembershipsFromRoomAndMembershipStmt *sql.Stmt
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selectMembershipsFromRoomStmt *sql.Stmt
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selectLocalMembershipsFromRoomStmt *sql.Stmt
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selectRoomsWithMembershipStmt *sql.Stmt
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updateMembershipStmt *sql.Stmt
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selectKnownUsersStmt *sql.Stmt
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updateMembershipForgetRoomStmt *sql.Stmt
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selectLocalServerInRoomStmt *sql.Stmt
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selectServerInRoomStmt *sql.Stmt
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}
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func createMembershipTable(db *sql.DB) error {
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_, err := db.Exec(membershipSchema)
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return err
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}
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func prepareMembershipTable(db *sql.DB) (tables.Membership, error) {
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s := &membershipStatements{
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db: db,
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}
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return s, sqlutil.StatementList{
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{&s.insertMembershipStmt, insertMembershipSQL},
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{&s.selectMembershipForUpdateStmt, selectMembershipForUpdateSQL},
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{&s.selectMembershipFromRoomAndTargetStmt, selectMembershipFromRoomAndTargetSQL},
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{&s.selectMembershipsFromRoomAndMembershipStmt, selectMembershipsFromRoomAndMembershipSQL},
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{&s.selectLocalMembershipsFromRoomAndMembershipStmt, selectLocalMembershipsFromRoomAndMembershipSQL},
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{&s.selectMembershipsFromRoomStmt, selectMembershipsFromRoomSQL},
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{&s.selectLocalMembershipsFromRoomStmt, selectLocalMembershipsFromRoomSQL},
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{&s.updateMembershipStmt, updateMembershipSQL},
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{&s.selectRoomsWithMembershipStmt, selectRoomsWithMembershipSQL},
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{&s.selectKnownUsersStmt, selectKnownUsersSQL},
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{&s.updateMembershipForgetRoomStmt, updateMembershipForgetRoom},
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{&s.selectLocalServerInRoomStmt, selectLocalServerInRoomSQL},
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{&s.selectServerInRoomStmt, selectServerInRoomSQL},
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}.Prepare(db)
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}
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func (s *membershipStatements) InsertMembership(
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ctx context.Context, txn *sql.Tx,
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roomNID types.RoomNID, targetUserNID types.EventStateKeyNID,
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localTarget bool,
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) error {
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stmt := sqlutil.TxStmt(txn, s.insertMembershipStmt)
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_, err := stmt.ExecContext(ctx, roomNID, targetUserNID, localTarget)
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return err
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}
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func (s *membershipStatements) SelectMembershipForUpdate(
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ctx context.Context, txn *sql.Tx,
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roomNID types.RoomNID, targetUserNID types.EventStateKeyNID,
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) (membership tables.MembershipState, err error) {
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stmt := sqlutil.TxStmt(txn, s.selectMembershipForUpdateStmt)
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err = stmt.QueryRowContext(
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ctx, roomNID, targetUserNID,
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).Scan(&membership)
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return
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}
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func (s *membershipStatements) SelectMembershipFromRoomAndTarget(
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ctx context.Context,
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roomNID types.RoomNID, targetUserNID types.EventStateKeyNID,
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) (eventNID types.EventNID, membership tables.MembershipState, forgotten bool, err error) {
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err = s.selectMembershipFromRoomAndTargetStmt.QueryRowContext(
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ctx, roomNID, targetUserNID,
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).Scan(&membership, &eventNID, &forgotten)
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return
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}
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func (s *membershipStatements) SelectMembershipsFromRoom(
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ctx context.Context,
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roomNID types.RoomNID, localOnly bool,
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) (eventNIDs []types.EventNID, err error) {
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var selectStmt *sql.Stmt
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if localOnly {
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selectStmt = s.selectLocalMembershipsFromRoomStmt
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} else {
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selectStmt = s.selectMembershipsFromRoomStmt
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}
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rows, err := selectStmt.QueryContext(ctx, roomNID)
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if err != nil {
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return nil, err
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}
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defer internal.CloseAndLogIfError(ctx, rows, "selectMembershipsFromRoom: rows.close() failed")
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for rows.Next() {
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var eNID types.EventNID
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if err = rows.Scan(&eNID); err != nil {
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return
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}
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eventNIDs = append(eventNIDs, eNID)
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}
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return
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}
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func (s *membershipStatements) SelectMembershipsFromRoomAndMembership(
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ctx context.Context,
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roomNID types.RoomNID, membership tables.MembershipState, localOnly bool,
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) (eventNIDs []types.EventNID, err error) {
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var stmt *sql.Stmt
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if localOnly {
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stmt = s.selectLocalMembershipsFromRoomAndMembershipStmt
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} else {
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stmt = s.selectMembershipsFromRoomAndMembershipStmt
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}
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rows, err := stmt.QueryContext(ctx, roomNID, membership)
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if err != nil {
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return
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}
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defer internal.CloseAndLogIfError(ctx, rows, "selectMembershipsFromRoomAndMembership: rows.close() failed")
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for rows.Next() {
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var eNID types.EventNID
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if err = rows.Scan(&eNID); err != nil {
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return
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}
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eventNIDs = append(eventNIDs, eNID)
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}
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return
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}
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func (s *membershipStatements) UpdateMembership(
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ctx context.Context, txn *sql.Tx,
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roomNID types.RoomNID, targetUserNID types.EventStateKeyNID, senderUserNID types.EventStateKeyNID, membership tables.MembershipState,
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eventNID types.EventNID, forgotten bool,
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) error {
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stmt := sqlutil.TxStmt(txn, s.updateMembershipStmt)
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_, err := stmt.ExecContext(
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ctx, senderUserNID, membership, eventNID, forgotten, roomNID, targetUserNID,
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)
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return err
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}
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func (s *membershipStatements) SelectRoomsWithMembership(
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ctx context.Context, userID types.EventStateKeyNID, membershipState tables.MembershipState,
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) ([]types.RoomNID, error) {
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rows, err := s.selectRoomsWithMembershipStmt.QueryContext(ctx, membershipState, userID)
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if err != nil {
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return nil, err
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}
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defer internal.CloseAndLogIfError(ctx, rows, "SelectRoomsWithMembership: rows.close() failed")
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var roomNIDs []types.RoomNID
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for rows.Next() {
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var roomNID types.RoomNID
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if err := rows.Scan(&roomNID); err != nil {
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return nil, err
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}
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roomNIDs = append(roomNIDs, roomNID)
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}
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return roomNIDs, nil
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}
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func (s *membershipStatements) SelectJoinedUsersSetForRooms(ctx context.Context, roomNIDs []types.RoomNID) (map[types.EventStateKeyNID]int, error) {
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iRoomNIDs := make([]interface{}, len(roomNIDs))
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for i, v := range roomNIDs {
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iRoomNIDs[i] = v
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}
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query := strings.Replace(selectJoinedUsersSetForRoomsSQL, "($1)", sqlutil.QueryVariadic(len(iRoomNIDs)), 1)
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rows, err := s.db.QueryContext(ctx, query, iRoomNIDs...)
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if err != nil {
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return nil, err
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}
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defer internal.CloseAndLogIfError(ctx, rows, "selectJoinedUsersSetForRooms: rows.close() failed")
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result := make(map[types.EventStateKeyNID]int)
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for rows.Next() {
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var userID types.EventStateKeyNID
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var count int
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if err := rows.Scan(&userID, &count); err != nil {
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return nil, err
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}
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result[userID] = count
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}
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return result, rows.Err()
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}
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func (s *membershipStatements) SelectKnownUsers(ctx context.Context, userID types.EventStateKeyNID, searchString string, limit int) ([]string, error) {
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rows, err := s.selectKnownUsersStmt.QueryContext(ctx, userID, fmt.Sprintf("%%%s%%", searchString), limit)
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if err != nil {
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return nil, err
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}
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result := []string{}
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defer internal.CloseAndLogIfError(ctx, rows, "SelectKnownUsers: rows.close() failed")
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for rows.Next() {
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var userID string
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if err := rows.Scan(&userID); err != nil {
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return nil, err
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}
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result = append(result, userID)
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}
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return result, rows.Err()
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}
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func (s *membershipStatements) UpdateForgetMembership(
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ctx context.Context,
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txn *sql.Tx, roomNID types.RoomNID, targetUserNID types.EventStateKeyNID,
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forget bool,
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) error {
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_, err := sqlutil.TxStmt(txn, s.updateMembershipForgetRoomStmt).ExecContext(
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ctx, forget, roomNID, targetUserNID,
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)
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return err
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}
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func (s *membershipStatements) SelectLocalServerInRoom(ctx context.Context, roomNID types.RoomNID) (bool, error) {
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var nid types.RoomNID
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err := s.selectLocalServerInRoomStmt.QueryRowContext(ctx, tables.MembershipStateJoin, roomNID).Scan(&nid)
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if err != nil {
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if err == sql.ErrNoRows {
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return false, nil
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}
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return false, err
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}
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found := nid > 0
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return found, nil
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}
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func (s *membershipStatements) SelectServerInRoom(ctx context.Context, roomNID types.RoomNID, serverName gomatrixserverlib.ServerName) (bool, error) {
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var nid types.RoomNID
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err := s.selectServerInRoomStmt.QueryRowContext(ctx, tables.MembershipStateJoin, roomNID, serverName).Scan(&nid)
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if err != nil {
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if err == sql.ErrNoRows {
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return false, nil
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}
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return false, err
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}
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return roomNID == nid, nil
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}
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