288 lines
9.5 KiB
Go
288 lines
9.5 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 postgres
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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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"github.com/lib/pq"
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"github.com/matrix-org/dendrite/common"
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"github.com/matrix-org/dendrite/syncapi/types"
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"github.com/matrix-org/gomatrix"
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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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-- The 'room_id' key for the state event.
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room_id TEXT NOT NULL,
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-- The state event ID
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event_id TEXT NOT NULL,
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-- The state event type e.g 'm.room.member'
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type TEXT NOT NULL,
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-- The 'sender' property of the event.
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sender TEXT NOT NULL,
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-- true if the event content contains a url key
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contains_url BOOL NOT NULL,
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-- The state_key value for this state event e.g ''
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state_key TEXT NOT NULL,
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-- The JSON for the event. Stored as TEXT because this should be valid UTF-8.
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event_json TEXT NOT NULL,
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-- The 'content.membership' value if this event is an m.room.member event. For other
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-- events, this will be NULL.
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membership TEXT,
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-- The serial ID of the output_room_events table when this event became
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-- part of the current state of the room.
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added_at BIGINT,
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-- Clobber based on 3-uple of room_id, type and state_key
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CONSTRAINT syncapi_room_state_unique 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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`
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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, 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 ON CONSTRAINT syncapi_room_state_unique" +
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" DO UPDATE SET event_id = $2, sender=$4, contains_url=$5, 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 selectRoomIDsWithMembershipSQL = "" +
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"SELECT 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_json FROM syncapi_current_room_state WHERE room_id = $1" +
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" AND ( $2::text[] IS NULL OR sender = ANY($2) )" +
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" AND ( $3::text[] IS NULL OR NOT(sender = ANY($3)) )" +
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" AND ( $4::text[] IS NULL OR type LIKE ANY($4) )" +
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" AND ( $5::text[] IS NULL OR NOT(type LIKE ANY($5)) )" +
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" AND ( $6::bool IS NULL OR contains_url = $6 )" +
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" LIMIT $7"
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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 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 five 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 added_at, 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 = ANY($1)"
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type currentRoomStateStatements struct {
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upsertRoomStateStmt *sql.Stmt
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deleteRoomStateByEventIDStmt *sql.Stmt
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selectRoomIDsWithMembershipStmt *sql.Stmt
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selectCurrentStateStmt *sql.Stmt
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selectJoinedUsersStmt *sql.Stmt
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selectEventsWithEventIDsStmt *sql.Stmt
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selectStateEventStmt *sql.Stmt
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}
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func (s *currentRoomStateStatements) prepare(db *sql.DB) (err error) {
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_, err = db.Exec(currentRoomStateSchema)
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if err != nil {
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return
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}
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if s.upsertRoomStateStmt, err = db.Prepare(upsertRoomStateSQL); err != nil {
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return
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}
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if s.deleteRoomStateByEventIDStmt, err = db.Prepare(deleteRoomStateByEventIDSQL); err != nil {
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return
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}
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if s.selectRoomIDsWithMembershipStmt, err = db.Prepare(selectRoomIDsWithMembershipSQL); err != nil {
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return
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}
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if s.selectCurrentStateStmt, err = db.Prepare(selectCurrentStateSQL); err != nil {
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return
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}
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if s.selectJoinedUsersStmt, err = db.Prepare(selectJoinedUsersSQL); err != nil {
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return
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}
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if s.selectEventsWithEventIDsStmt, err = db.Prepare(selectEventsWithEventIDsSQL); err != nil {
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return
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}
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if s.selectStateEventStmt, err = db.Prepare(selectStateEventSQL); err != nil {
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return
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}
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return
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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 rows.Close() // nolint: errcheck
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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 := common.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 rows.Close() // nolint: errcheck
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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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stateFilterPart *gomatrix.FilterPart,
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) ([]gomatrixserverlib.Event, error) {
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stmt := common.TxStmt(txn, s.selectCurrentStateStmt)
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rows, err := stmt.QueryContext(ctx, roomID,
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pq.StringArray(stateFilterPart.Senders),
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pq.StringArray(stateFilterPart.NotSenders),
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pq.StringArray(filterConvertTypeWildcardToSQL(stateFilterPart.Types)),
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pq.StringArray(filterConvertTypeWildcardToSQL(stateFilterPart.NotTypes)),
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stateFilterPart.ContainsURL,
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stateFilterPart.Limit,
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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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defer rows.Close() // nolint: errcheck
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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 := common.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) upsertRoomState(
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ctx context.Context, txn *sql.Tx,
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event gomatrixserverlib.Event, 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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// upsert state event
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stmt := common.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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event.JSON(),
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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 (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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stmt := common.TxStmt(txn, s.selectEventsWithEventIDsStmt)
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rows, err := stmt.QueryContext(ctx, pq.StringArray(eventIDs))
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if err != nil {
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return nil, err
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}
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defer rows.Close() // nolint: errcheck
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return rowsToStreamEvents(rows)
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}
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func rowsToEvents(rows *sql.Rows) ([]gomatrixserverlib.Event, error) {
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result := []gomatrixserverlib.Event{}
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for rows.Next() {
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var eventBytes []byte
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if err := rows.Scan(&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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ev, err := gomatrixserverlib.NewEventFromTrustedJSON(eventBytes, false)
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if 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.Event, 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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ev, err := gomatrixserverlib.NewEventFromTrustedJSON(res, false)
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return &ev, err
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}
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