dendrite/syncapi/storage/sqlite3/current_room_state_table.go

324 lines
10 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"
"fmt"
"strings"
"github.com/matrix-org/dendrite/internal"
"github.com/matrix-org/dendrite/internal/sqlutil"
"github.com/matrix-org/dendrite/syncapi/storage/tables"
"github.com/matrix-org/dendrite/syncapi/types"
"github.com/matrix-org/gomatrixserverlib"
)
const currentRoomStateSchema = `
-- Stores the current room state for every room.
CREATE TABLE IF NOT EXISTS syncapi_current_room_state (
room_id TEXT NOT NULL,
event_id TEXT NOT NULL,
type TEXT NOT NULL,
sender TEXT NOT NULL,
contains_url BOOL NOT NULL DEFAULT false,
state_key TEXT NOT NULL,
headered_event_json TEXT NOT NULL,
membership TEXT,
added_at BIGINT,
UNIQUE (room_id, type, state_key)
);
-- for event deletion
CREATE UNIQUE INDEX IF NOT EXISTS syncapi_event_id_idx ON syncapi_current_room_state(event_id, room_id, type, sender, contains_url);
-- for querying membership states of users
-- CREATE INDEX IF NOT EXISTS syncapi_membership_idx ON syncapi_current_room_state(type, state_key, membership) WHERE membership IS NOT NULL AND membership != 'leave';
-- for querying state by event IDs
CREATE UNIQUE INDEX IF NOT EXISTS syncapi_current_room_state_eventid_idx ON syncapi_current_room_state(event_id);
`
const upsertRoomStateSQL = "" +
"INSERT INTO syncapi_current_room_state (room_id, event_id, type, sender, contains_url, state_key, headered_event_json, membership, added_at)" +
" VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9)" +
" ON CONFLICT (room_id, type, state_key)" +
" DO UPDATE SET event_id = $2, sender=$4, contains_url=$5, headered_event_json = $7, membership = $8, added_at = $9"
const deleteRoomStateByEventIDSQL = "" +
"DELETE FROM syncapi_current_room_state WHERE event_id = $1"
const DeleteRoomStateForRoomSQL = "" +
"DELETE FROM syncapi_current_room_state WHERE event_id = $1"
const selectRoomIDsWithMembershipSQL = "" +
"SELECT DISTINCT room_id FROM syncapi_current_room_state WHERE type = 'm.room.member' AND state_key = $1 AND membership = $2"
const selectCurrentStateSQL = "" +
"SELECT event_id, headered_event_json FROM syncapi_current_room_state WHERE room_id = $1"
// WHEN, ORDER BY and LIMIT will be added by prepareWithFilter
const selectJoinedUsersSQL = "" +
"SELECT room_id, state_key FROM syncapi_current_room_state WHERE type = 'm.room.member' AND membership = 'join'"
const selectStateEventSQL = "" +
"SELECT headered_event_json FROM syncapi_current_room_state WHERE room_id = $1 AND type = $2 AND state_key = $3"
const selectEventsWithEventIDsSQL = "" +
// TODO: The session_id and transaction_id blanks are here because otherwise
// the rowsToStreamEvents expects there to be exactly six columns. We need to
// figure out if these really need to be in the DB, and if so, we need a
// better permanent fix for this. - neilalexander, 2 Jan 2020
"SELECT event_id, added_at, headered_event_json, 0 AS session_id, false AS exclude_from_sync, '' AS transaction_id" +
" FROM syncapi_current_room_state WHERE event_id IN ($1)"
type currentRoomStateStatements struct {
db *sql.DB
streamIDStatements *streamIDStatements
upsertRoomStateStmt *sql.Stmt
deleteRoomStateByEventIDStmt *sql.Stmt
DeleteRoomStateForRoomStmt *sql.Stmt
selectRoomIDsWithMembershipStmt *sql.Stmt
selectJoinedUsersStmt *sql.Stmt
selectStateEventStmt *sql.Stmt
}
func NewSqliteCurrentRoomStateTable(db *sql.DB, streamID *streamIDStatements) (tables.CurrentRoomState, error) {
s := &currentRoomStateStatements{
db: db,
streamIDStatements: streamID,
}
_, err := db.Exec(currentRoomStateSchema)
if err != nil {
return nil, err
}
if s.upsertRoomStateStmt, err = db.Prepare(upsertRoomStateSQL); err != nil {
return nil, err
}
if s.deleteRoomStateByEventIDStmt, err = db.Prepare(deleteRoomStateByEventIDSQL); err != nil {
return nil, err
}
if s.DeleteRoomStateForRoomStmt, err = db.Prepare(DeleteRoomStateForRoomSQL); err != nil {
return nil, err
}
if s.selectRoomIDsWithMembershipStmt, err = db.Prepare(selectRoomIDsWithMembershipSQL); err != nil {
return nil, err
}
if s.selectJoinedUsersStmt, err = db.Prepare(selectJoinedUsersSQL); err != nil {
return nil, err
}
if s.selectStateEventStmt, err = db.Prepare(selectStateEventSQL); err != nil {
return nil, err
}
return s, nil
}
// JoinedMemberLists returns a map of room ID to a list of joined user IDs.
func (s *currentRoomStateStatements) SelectJoinedUsers(
ctx context.Context,
) (map[string][]string, error) {
rows, err := s.selectJoinedUsersStmt.QueryContext(ctx)
if err != nil {
return nil, err
}
defer internal.CloseAndLogIfError(ctx, rows, "selectJoinedUsers: rows.close() failed")
result := make(map[string][]string)
for rows.Next() {
var roomID string
var userID string
if err := rows.Scan(&roomID, &userID); err != nil {
return nil, err
}
users := result[roomID]
users = append(users, userID)
result[roomID] = users
}
return result, nil
}
// SelectRoomIDsWithMembership returns the list of room IDs which have the given user in the given membership state.
func (s *currentRoomStateStatements) SelectRoomIDsWithMembership(
ctx context.Context,
txn *sql.Tx,
userID string,
membership string, // nolint: unparam
) ([]string, error) {
stmt := sqlutil.TxStmt(txn, s.selectRoomIDsWithMembershipStmt)
rows, err := stmt.QueryContext(ctx, userID, membership)
if err != nil {
return nil, err
}
defer internal.CloseAndLogIfError(ctx, rows, "selectRoomIDsWithMembership: rows.close() failed")
var result []string
for rows.Next() {
var roomID string
if err := rows.Scan(&roomID); err != nil {
return nil, err
}
result = append(result, roomID)
}
return result, nil
}
// CurrentState returns all the current state events for the given room.
func (s *currentRoomStateStatements) SelectCurrentState(
ctx context.Context, txn *sql.Tx, roomID string,
stateFilter *gomatrixserverlib.StateFilter,
) ([]*gomatrixserverlib.HeaderedEvent, error) {
stmt, params, err := prepareWithFilters(
s.db, txn, selectCurrentStateSQL,
[]interface{}{
roomID,
},
stateFilter.Senders, stateFilter.NotSenders,
stateFilter.Types, stateFilter.NotTypes,
stateFilter.Limit, FilterOrderNone,
)
if err != nil {
return nil, fmt.Errorf("s.prepareWithFilters: %w", err)
}
rows, err := stmt.QueryContext(ctx, params...)
if err != nil {
return nil, err
}
defer internal.CloseAndLogIfError(ctx, rows, "selectCurrentState: rows.close() failed")
return rowsToEvents(rows)
}
func (s *currentRoomStateStatements) DeleteRoomStateByEventID(
ctx context.Context, txn *sql.Tx, eventID string,
) error {
stmt := sqlutil.TxStmt(txn, s.deleteRoomStateByEventIDStmt)
_, err := stmt.ExecContext(ctx, eventID)
return err
}
func (s *currentRoomStateStatements) DeleteRoomStateForRoom(
ctx context.Context, txn *sql.Tx, roomID string,
) error {
stmt := sqlutil.TxStmt(txn, s.DeleteRoomStateForRoomStmt)
_, err := stmt.ExecContext(ctx, roomID)
return err
}
func (s *currentRoomStateStatements) UpsertRoomState(
ctx context.Context, txn *sql.Tx,
event *gomatrixserverlib.HeaderedEvent, membership *string, addedAt types.StreamPosition,
) error {
// Parse content as JSON and search for an "url" key
containsURL := false
var content map[string]interface{}
if json.Unmarshal(event.Content(), &content) != nil {
// Set containsURL to true if url is present
_, containsURL = content["url"]
}
headeredJSON, err := json.Marshal(event)
if err != nil {
return err
}
// upsert state event
stmt := sqlutil.TxStmt(txn, s.upsertRoomStateStmt)
_, err = stmt.ExecContext(
ctx,
event.RoomID(),
event.EventID(),
event.Type(),
event.Sender(),
containsURL,
*event.StateKey(),
headeredJSON,
membership,
addedAt,
)
return err
}
func minOfInts(a, b int) int {
if a <= b {
return a
}
return b
}
func (s *currentRoomStateStatements) SelectEventsWithEventIDs(
ctx context.Context, txn *sql.Tx, eventIDs []string,
) ([]types.StreamEvent, error) {
iEventIDs := make([]interface{}, len(eventIDs))
for k, v := range eventIDs {
iEventIDs[k] = v
}
res := make([]types.StreamEvent, 0, len(eventIDs))
var start int
for start < len(eventIDs) {
n := minOfInts(len(eventIDs)-start, 999)
query := strings.Replace(selectEventsWithEventIDsSQL, "($1)", sqlutil.QueryVariadic(n), 1)
rows, err := txn.QueryContext(ctx, query, iEventIDs[start:start+n]...)
if err != nil {
return nil, err
}
start = start + n
events, err := rowsToStreamEvents(rows)
internal.CloseAndLogIfError(ctx, rows, "selectEventsWithEventIDs: rows.close() failed")
if err != nil {
return nil, err
}
res = append(res, events...)
}
return res, nil
}
func rowsToEvents(rows *sql.Rows) ([]*gomatrixserverlib.HeaderedEvent, error) {
result := []*gomatrixserverlib.HeaderedEvent{}
for rows.Next() {
var eventID string
var eventBytes []byte
if err := rows.Scan(&eventID, &eventBytes); err != nil {
return nil, err
}
// TODO: Handle redacted events
var ev gomatrixserverlib.HeaderedEvent
if err := ev.UnmarshalJSONWithEventID(eventBytes, eventID); err != nil {
return nil, err
}
result = append(result, &ev)
}
return result, nil
}
func (s *currentRoomStateStatements) SelectStateEvent(
ctx context.Context, roomID, evType, stateKey string,
) (*gomatrixserverlib.HeaderedEvent, error) {
stmt := s.selectStateEventStmt
var res []byte
err := stmt.QueryRowContext(ctx, roomID, evType, stateKey).Scan(&res)
if err == sql.ErrNoRows {
return nil, nil
}
if err != nil {
return nil, err
}
var ev gomatrixserverlib.HeaderedEvent
if err = json.Unmarshal(res, &ev); err != nil {
return nil, err
}
return &ev, err
}