dendrite/roomserver/storage/sqlite3/rooms_table.go

166 lines
5.3 KiB
Go

// 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"
"encoding/json"
"github.com/matrix-org/dendrite/common"
"github.com/matrix-org/dendrite/roomserver/types"
)
const roomsSchema = `
CREATE TABLE IF NOT EXISTS roomserver_rooms (
room_nid INTEGER PRIMARY KEY AUTOINCREMENT,
room_id TEXT NOT NULL UNIQUE,
latest_event_nids TEXT NOT NULL DEFAULT '[]',
last_event_sent_nid INTEGER NOT NULL DEFAULT 0,
state_snapshot_nid INTEGER NOT NULL DEFAULT 0,
room_version INTEGER NOT NULL DEFAULT 1
);
`
// Same as insertEventTypeNIDSQL
const insertRoomNIDSQL = `
INSERT INTO roomserver_rooms (room_id) VALUES ($1)
ON CONFLICT DO NOTHING;
`
const selectRoomNIDSQL = "" +
"SELECT room_nid FROM roomserver_rooms WHERE room_id = $1"
const selectLatestEventNIDsSQL = "" +
"SELECT latest_event_nids, state_snapshot_nid FROM roomserver_rooms WHERE room_nid = $1"
const selectLatestEventNIDsForUpdateSQL = "" +
"SELECT latest_event_nids, last_event_sent_nid, state_snapshot_nid FROM roomserver_rooms WHERE room_nid = $1"
const updateLatestEventNIDsSQL = "" +
"UPDATE roomserver_rooms SET latest_event_nids = $1, last_event_sent_nid = $2, state_snapshot_nid = $3 WHERE room_nid = $4"
const selectRoomVersionForRoomNIDSQL = "" +
"SELECT room_version FROM roomserver_rooms WHERE room_nid = $1"
type roomStatements struct {
insertRoomNIDStmt *sql.Stmt
selectRoomNIDStmt *sql.Stmt
selectLatestEventNIDsStmt *sql.Stmt
selectLatestEventNIDsForUpdateStmt *sql.Stmt
updateLatestEventNIDsStmt *sql.Stmt
selectRoomVersionForRoomNIDStmt *sql.Stmt
}
func (s *roomStatements) prepare(db *sql.DB) (err error) {
_, err = db.Exec(roomsSchema)
if err != nil {
return
}
return statementList{
{&s.insertRoomNIDStmt, insertRoomNIDSQL},
{&s.selectRoomNIDStmt, selectRoomNIDSQL},
{&s.selectLatestEventNIDsStmt, selectLatestEventNIDsSQL},
{&s.selectLatestEventNIDsForUpdateStmt, selectLatestEventNIDsForUpdateSQL},
{&s.updateLatestEventNIDsStmt, updateLatestEventNIDsSQL},
{&s.selectRoomVersionForRoomNIDStmt, selectRoomVersionForRoomNIDSQL},
}.prepare(db)
}
func (s *roomStatements) insertRoomNID(
ctx context.Context, txn *sql.Tx, roomID string,
) (types.RoomNID, error) {
var err error
insertStmt := common.TxStmt(txn, s.insertRoomNIDStmt)
if _, err = insertStmt.ExecContext(ctx, roomID); err == nil {
return s.selectRoomNID(ctx, txn, roomID)
} else {
return types.RoomNID(0), err
}
}
func (s *roomStatements) selectRoomNID(
ctx context.Context, txn *sql.Tx, roomID string,
) (types.RoomNID, error) {
var roomNID int64
stmt := common.TxStmt(txn, s.selectRoomNIDStmt)
err := stmt.QueryRowContext(ctx, roomID).Scan(&roomNID)
return types.RoomNID(roomNID), err
}
func (s *roomStatements) selectLatestEventNIDs(
ctx context.Context, txn *sql.Tx, roomNID types.RoomNID,
) ([]types.EventNID, types.StateSnapshotNID, error) {
var eventNIDs []types.EventNID
var nidsJSON string
var stateSnapshotNID int64
stmt := common.TxStmt(txn, s.selectLatestEventNIDsStmt)
err := stmt.QueryRowContext(ctx, int64(roomNID)).Scan(&nidsJSON, &stateSnapshotNID)
if err != nil {
return nil, 0, err
}
if err := json.Unmarshal([]byte(nidsJSON), &eventNIDs); err != nil {
return nil, 0, err
}
return eventNIDs, types.StateSnapshotNID(stateSnapshotNID), nil
}
func (s *roomStatements) selectLatestEventsNIDsForUpdate(
ctx context.Context, txn *sql.Tx, roomNID types.RoomNID,
) ([]types.EventNID, types.EventNID, types.StateSnapshotNID, error) {
var eventNIDs []types.EventNID
var nidsJSON string
var lastEventSentNID int64
var stateSnapshotNID int64
stmt := common.TxStmt(txn, s.selectLatestEventNIDsForUpdateStmt)
err := stmt.QueryRowContext(ctx, int64(roomNID)).Scan(&nidsJSON, &lastEventSentNID, &stateSnapshotNID)
if err != nil {
return nil, 0, 0, err
}
if err := json.Unmarshal([]byte(nidsJSON), &eventNIDs); err != nil {
return nil, 0, 0, err
}
return eventNIDs, types.EventNID(lastEventSentNID), types.StateSnapshotNID(stateSnapshotNID), nil
}
func (s *roomStatements) updateLatestEventNIDs(
ctx context.Context,
txn *sql.Tx,
roomNID types.RoomNID,
eventNIDs []types.EventNID,
lastEventSentNID types.EventNID,
stateSnapshotNID types.StateSnapshotNID,
) error {
stmt := common.TxStmt(txn, s.updateLatestEventNIDsStmt)
_, err := stmt.ExecContext(
ctx,
eventNIDsAsArray(eventNIDs),
int64(lastEventSentNID),
int64(stateSnapshotNID),
roomNID,
)
return err
}
func (s *roomStatements) selectRoomVersionForRoomNID(
ctx context.Context, txn *sql.Tx, roomNID types.RoomNID,
) (int64, error) {
var roomVersion int64
stmt := common.TxStmt(txn, s.selectRoomVersionForRoomNIDStmt)
err := stmt.QueryRowContext(ctx, roomNID).Scan(&roomVersion)
return roomVersion, err
}