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