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// Copyright 2017-2018 New Vector Ltd
// Copyright 2019-2020 The Matrix.org Foundation C.I.C.
//
// 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.
package sqlite3
import (
"context"
"database/sql"
"github.com/matrix-org/dendrite/internal"
"github.com/matrix-org/dendrite/internal/sqlutil"
"github.com/matrix-org/dendrite/roomserver/storage/shared"
"github.com/matrix-org/dendrite/roomserver/storage/tables"
"github.com/matrix-org/dendrite/roomserver/types"
)
const membershipSchema = `
CREATE TABLE IF NOT EXISTS roomserver_membership (
room_nid INTEGER NOT NULL,
target_nid INTEGER NOT NULL,
sender_nid INTEGER NOT NULL DEFAULT 0,
membership_nid INTEGER NOT NULL DEFAULT 1,
event_nid INTEGER NOT NULL DEFAULT 0,
target_local BOOLEAN NOT NULL DEFAULT false,
UNIQUE (room_nid, target_nid)
);
`
// Insert a row in to membership table so that it can be locked by the
// SELECT FOR UPDATE
const insertMembershipSQL = "" +
"INSERT INTO roomserver_membership (room_nid, target_nid, target_local)" +
" VALUES ($1, $2, $3)" +
" ON CONFLICT DO NOTHING"
const selectMembershipFromRoomAndTargetSQL = "" +
"SELECT membership_nid, event_nid FROM roomserver_membership" +
" WHERE room_nid = $1 AND target_nid = $2"
const selectMembershipsFromRoomAndMembershipSQL = "" +
"SELECT event_nid FROM roomserver_membership" +
" WHERE room_nid = $1 AND membership_nid = $2"
const selectLocalMembershipsFromRoomAndMembershipSQL = "" +
"SELECT event_nid FROM roomserver_membership" +
" WHERE room_nid = $1 AND membership_nid = $2" +
" AND target_local = true"
const selectMembershipsFromRoomSQL = "" +
"SELECT event_nid FROM roomserver_membership" +
" WHERE room_nid = $1"
const selectLocalMembershipsFromRoomSQL = "" +
"SELECT event_nid FROM roomserver_membership" +
" WHERE room_nid = $1" +
" AND target_local = true"
const selectMembershipForUpdateSQL = "" +
"SELECT membership_nid FROM roomserver_membership" +
" WHERE room_nid = $1 AND target_nid = $2"
const updateMembershipSQL = "" +
"UPDATE roomserver_membership SET sender_nid = $1, membership_nid = $2, event_nid = $3" +
" WHERE room_nid = $4 AND target_nid = $5"
type membershipStatements struct {
db *sql.DB
writer *sqlutil.TransactionWriter
insertMembershipStmt *sql.Stmt
selectMembershipForUpdateStmt *sql.Stmt
selectMembershipFromRoomAndTargetStmt *sql.Stmt
selectMembershipsFromRoomAndMembershipStmt *sql.Stmt
selectLocalMembershipsFromRoomAndMembershipStmt *sql.Stmt
selectMembershipsFromRoomStmt *sql.Stmt
selectLocalMembershipsFromRoomStmt *sql.Stmt
updateMembershipStmt *sql.Stmt
}
func NewSqliteMembershipTable(db *sql.DB, writer *sqlutil.TransactionWriter) (tables.Membership, error) {
s := &membershipStatements{
db: db,
writer: writer,
}
_, err := db.Exec(membershipSchema)
if err != nil {
return nil, err
}
return s, shared.StatementList{
{&s.insertMembershipStmt, insertMembershipSQL},
{&s.selectMembershipForUpdateStmt, selectMembershipForUpdateSQL},
{&s.selectMembershipFromRoomAndTargetStmt, selectMembershipFromRoomAndTargetSQL},
{&s.selectMembershipsFromRoomAndMembershipStmt, selectMembershipsFromRoomAndMembershipSQL},
{&s.selectLocalMembershipsFromRoomAndMembershipStmt, selectLocalMembershipsFromRoomAndMembershipSQL},
{&s.selectMembershipsFromRoomStmt, selectMembershipsFromRoomSQL},
{&s.selectLocalMembershipsFromRoomStmt, selectLocalMembershipsFromRoomSQL},
{&s.updateMembershipStmt, updateMembershipSQL},
}.Prepare(db)
}
func (s *membershipStatements) InsertMembership(
ctx context.Context, txn *sql.Tx,
roomNID types.RoomNID, targetUserNID types.EventStateKeyNID,
localTarget bool,
) error {
return s.writer.Do(s.db, txn, func(txn *sql.Tx) error {
stmt := sqlutil.TxStmt(txn, s.insertMembershipStmt)
_, err := stmt.ExecContext(ctx, roomNID, targetUserNID, localTarget)
return err
})
}
func (s *membershipStatements) SelectMembershipForUpdate(
ctx context.Context, txn *sql.Tx,
roomNID types.RoomNID, targetUserNID types.EventStateKeyNID,
) (membership tables.MembershipState, err error) {
stmt := sqlutil.TxStmt(txn, s.selectMembershipForUpdateStmt)
err = stmt.QueryRowContext(
ctx, roomNID, targetUserNID,
).Scan(&membership)
return
}
func (s *membershipStatements) SelectMembershipFromRoomAndTarget(
ctx context.Context,
roomNID types.RoomNID, targetUserNID types.EventStateKeyNID,
) (eventNID types.EventNID, membership tables.MembershipState, err error) {
err = s.selectMembershipFromRoomAndTargetStmt.QueryRowContext(
ctx, roomNID, targetUserNID,
).Scan(&membership, &eventNID)
return
}
func (s *membershipStatements) SelectMembershipsFromRoom(
ctx context.Context,
roomNID types.RoomNID, localOnly bool,
) (eventNIDs []types.EventNID, err error) {
var selectStmt *sql.Stmt
if localOnly {
selectStmt = s.selectLocalMembershipsFromRoomStmt
} else {
selectStmt = s.selectMembershipsFromRoomStmt
}
rows, err := selectStmt.QueryContext(ctx, roomNID)
if err != nil {
return nil, err
}
defer internal.CloseAndLogIfError(ctx, rows, "selectMembershipsFromRoom: rows.close() failed")
for rows.Next() {
var eNID types.EventNID
if err = rows.Scan(&eNID); err != nil {
return
}
eventNIDs = append(eventNIDs, eNID)
}
return
}
func (s *membershipStatements) SelectMembershipsFromRoomAndMembership(
ctx context.Context,
roomNID types.RoomNID, membership tables.MembershipState, localOnly bool,
) (eventNIDs []types.EventNID, err error) {
var stmt *sql.Stmt
if localOnly {
stmt = s.selectLocalMembershipsFromRoomAndMembershipStmt
} else {
stmt = s.selectMembershipsFromRoomAndMembershipStmt
}
rows, err := stmt.QueryContext(ctx, roomNID, membership)
if err != nil {
return
}
defer internal.CloseAndLogIfError(ctx, rows, "selectMembershipsFromRoomAndMembership: rows.close() failed")
for rows.Next() {
var eNID types.EventNID
if err = rows.Scan(&eNID); err != nil {
return
}
eventNIDs = append(eventNIDs, eNID)
}
return
}
func (s *membershipStatements) UpdateMembership(
ctx context.Context, txn *sql.Tx,
roomNID types.RoomNID, targetUserNID types.EventStateKeyNID,
senderUserNID types.EventStateKeyNID, membership tables.MembershipState,
eventNID types.EventNID,
) error {
return s.writer.Do(s.db, txn, func(txn *sql.Tx) error {
stmt := sqlutil.TxStmt(txn, s.updateMembershipStmt)
_, err := stmt.ExecContext(
ctx, senderUserNID, membership, eventNID, roomNID, targetUserNID,
)
return err
})
}
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