dendrite/currentstateserver/storage/postgres/current_room_state_table.go

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// Copyright 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 postgres
import (
"context"
"database/sql"
"encoding/json"
"github.com/lib/pq"
"github.com/matrix-org/dendrite/currentstateserver/storage/tables"
"github.com/matrix-org/dendrite/internal"
"github.com/matrix-org/dendrite/internal/sqlutil"
"github.com/matrix-org/gomatrixserverlib"
)
var currentRoomStateSchema = `
-- Stores the current room state for every room.
CREATE TABLE IF NOT EXISTS currentstate_current_room_state (
-- The 'room_id' key for the state event.
room_id TEXT NOT NULL,
-- The state event ID
event_id TEXT NOT NULL,
-- The state event type e.g 'm.room.member'
type TEXT NOT NULL,
-- The 'sender' property of the event.
sender TEXT NOT NULL,
-- The state_key value for this state event e.g ''
state_key TEXT NOT NULL,
-- The JSON for the event. Stored as TEXT because this should be valid UTF-8.
headered_event_json TEXT NOT NULL,
-- A piece of extracted content e.g membership for m.room.member events
content_value TEXT NOT NULL DEFAULT '',
-- Clobber based on 3-uple of room_id, type and state_key
CONSTRAINT currentstate_current_room_state_unique UNIQUE (room_id, type, state_key)
);
-- for event deletion
CREATE UNIQUE INDEX IF NOT EXISTS currentstate_event_id_idx ON currentstate_current_room_state(event_id, room_id, type, sender);
-- for querying membership states of users
CREATE INDEX IF NOT EXISTS currentstate_membership_idx ON currentstate_current_room_state(type, state_key, content_value)
WHERE type='m.room.member' AND content_value IS NOT NULL AND content_value != 'leave';
`
const upsertRoomStateSQL = "" +
"INSERT INTO currentstate_current_room_state (room_id, event_id, type, sender, state_key, headered_event_json, content_value)" +
" VALUES ($1, $2, $3, $4, $5, $6, $7)" +
" ON CONFLICT ON CONSTRAINT currentstate_current_room_state_unique" +
" DO UPDATE SET event_id = $2, sender=$4, headered_event_json = $6, content_value = $7"
const deleteRoomStateByEventIDSQL = "" +
"DELETE FROM currentstate_current_room_state WHERE event_id = $1"
const selectRoomIDsWithMembershipSQL = "" +
"SELECT room_id FROM currentstate_current_room_state WHERE type = 'm.room.member' AND state_key = $1 AND content_value = $2"
const selectStateEventSQL = "" +
"SELECT headered_event_json FROM currentstate_current_room_state WHERE room_id = $1 AND type = $2 AND state_key = $3"
const selectEventsWithEventIDsSQL = "" +
"SELECT headered_event_json FROM currentstate_current_room_state WHERE event_id = ANY($1)"
const selectBulkStateContentSQL = "" +
"SELECT room_id, type, state_key, content_value FROM currentstate_current_room_state WHERE room_id = ANY($1) AND type = ANY($2) AND state_key = ANY($3)"
const selectBulkStateContentWildSQL = "" +
"SELECT room_id, type, state_key, content_value FROM currentstate_current_room_state WHERE room_id = ANY($1) AND type = ANY($2)"
const selectJoinedUsersSetForRoomsSQL = "" +
"SELECT state_key, COUNT(room_id) FROM currentstate_current_room_state WHERE room_id = ANY($1) AND" +
" type = 'm.room.member' and content_value = 'join' GROUP BY state_key"
type currentRoomStateStatements struct {
upsertRoomStateStmt *sql.Stmt
deleteRoomStateByEventIDStmt *sql.Stmt
selectRoomIDsWithMembershipStmt *sql.Stmt
selectEventsWithEventIDsStmt *sql.Stmt
selectStateEventStmt *sql.Stmt
selectBulkStateContentStmt *sql.Stmt
selectBulkStateContentWildStmt *sql.Stmt
selectJoinedUsersSetForRoomsStmt *sql.Stmt
}
func NewPostgresCurrentRoomStateTable(db *sql.DB) (tables.CurrentRoomState, error) {
s := &currentRoomStateStatements{}
_, 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.selectRoomIDsWithMembershipStmt, err = db.Prepare(selectRoomIDsWithMembershipSQL); err != nil {
return nil, err
}
if s.selectEventsWithEventIDsStmt, err = db.Prepare(selectEventsWithEventIDsSQL); err != nil {
return nil, err
}
if s.selectStateEventStmt, err = db.Prepare(selectStateEventSQL); err != nil {
return nil, err
}
if s.selectBulkStateContentStmt, err = db.Prepare(selectBulkStateContentSQL); err != nil {
return nil, err
}
if s.selectBulkStateContentWildStmt, err = db.Prepare(selectBulkStateContentWildSQL); err != nil {
return nil, err
}
if s.selectJoinedUsersSetForRoomsStmt, err = db.Prepare(selectJoinedUsersSetForRoomsSQL); err != nil {
return nil, err
}
return s, nil
}
func (s *currentRoomStateStatements) SelectJoinedUsersSetForRooms(ctx context.Context, roomIDs []string) (map[string]int, error) {
rows, err := s.selectJoinedUsersSetForRoomsStmt.QueryContext(ctx, pq.StringArray(roomIDs))
if err != nil {
return nil, err
}
defer internal.CloseAndLogIfError(ctx, rows, "selectJoinedUsersSetForRooms: rows.close() failed")
result := make(map[string]int)
for rows.Next() {
var userID string
var count int
if err := rows.Scan(&userID, &count); err != nil {
return nil, err
}
result[userID] = count
}
return result, rows.Err()
}
// 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,
contentVal string,
) ([]string, error) {
stmt := sqlutil.TxStmt(txn, s.selectRoomIDsWithMembershipStmt)
rows, err := stmt.QueryContext(ctx, userID, contentVal)
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, rows.Err()
}
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) UpsertRoomState(
ctx context.Context, txn *sql.Tx,
event gomatrixserverlib.HeaderedEvent, contentVal string,
) error {
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(),
*event.StateKey(),
headeredJSON,
contentVal,
)
return err
}
func (s *currentRoomStateStatements) SelectEventsWithEventIDs(
ctx context.Context, txn *sql.Tx, eventIDs []string,
) ([]gomatrixserverlib.HeaderedEvent, error) {
stmt := sqlutil.TxStmt(txn, s.selectEventsWithEventIDsStmt)
rows, err := stmt.QueryContext(ctx, pq.StringArray(eventIDs))
if err != nil {
return nil, err
}
defer internal.CloseAndLogIfError(ctx, rows, "selectEventsWithEventIDs: rows.close() failed")
result := []gomatrixserverlib.HeaderedEvent{}
for rows.Next() {
var eventBytes []byte
if err := rows.Scan(&eventBytes); err != nil {
return nil, err
}
var ev gomatrixserverlib.HeaderedEvent
if err := json.Unmarshal(eventBytes, &ev); err != nil {
return nil, err
}
result = append(result, ev)
}
return result, rows.Err()
}
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
}
func (s *currentRoomStateStatements) SelectBulkStateContent(
ctx context.Context, roomIDs []string, tuples []gomatrixserverlib.StateKeyTuple, allowWildcards bool,
) ([]tables.StrippedEvent, error) {
hasWildcards := false
eventTypeSet := make(map[string]bool)
stateKeySet := make(map[string]bool)
var eventTypes []string
var stateKeys []string
for _, tuple := range tuples {
if !eventTypeSet[tuple.EventType] {
eventTypeSet[tuple.EventType] = true
eventTypes = append(eventTypes, tuple.EventType)
}
if !stateKeySet[tuple.StateKey] {
stateKeySet[tuple.StateKey] = true
stateKeys = append(stateKeys, tuple.StateKey)
}
if tuple.StateKey == "*" {
hasWildcards = true
}
}
var rows *sql.Rows
var err error
if hasWildcards && allowWildcards {
rows, err = s.selectBulkStateContentWildStmt.QueryContext(ctx, pq.StringArray(roomIDs), pq.StringArray(eventTypes))
} else {
rows, err = s.selectBulkStateContentStmt.QueryContext(
ctx, pq.StringArray(roomIDs), pq.StringArray(eventTypes), pq.StringArray(stateKeys),
)
}
if err != nil {
return nil, err
}
strippedEvents := []tables.StrippedEvent{}
defer internal.CloseAndLogIfError(ctx, rows, "SelectBulkStateContent: rows.close() failed")
for rows.Next() {
var roomID string
var eventType string
var stateKey string
var contentVal string
if err = rows.Scan(&roomID, &eventType, &stateKey, &contentVal); err != nil {
return nil, err
}
strippedEvents = append(strippedEvents, tables.StrippedEvent{
RoomID: roomID,
ContentValue: contentVal,
EventType: eventType,
StateKey: stateKey,
})
}
return strippedEvents, rows.Err()
}