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matrix-org.dendrite/syncapi/storage/postgres/output_room_events_table.go

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// 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 postgres
import (
"context"
"database/sql"
"encoding/json"
"fmt"
"sort"
"github.com/lib/pq"
"github.com/matrix-org/dendrite/internal"
"github.com/matrix-org/dendrite/internal/sqlutil"
"github.com/matrix-org/dendrite/roomserver/api"
rstypes "github.com/matrix-org/dendrite/roomserver/types"
"github.com/matrix-org/dendrite/syncapi/storage/postgres/deltas"
"github.com/matrix-org/dendrite/syncapi/storage/tables"
"github.com/matrix-org/dendrite/syncapi/synctypes"
"github.com/matrix-org/dendrite/syncapi/types"
"github.com/matrix-org/gomatrixserverlib"
)
const outputRoomEventsSchema = `
-- This sequence is shared between all the tables generated from kafka logs.
CREATE SEQUENCE IF NOT EXISTS syncapi_stream_id;
-- Stores output room events received from the roomserver.
CREATE TABLE IF NOT EXISTS syncapi_output_room_events (
-- An incrementing ID which denotes the position in the log that this event resides at.
-- NB: 'serial' makes no guarantees to increment by 1 every time, only that it increments.
-- This isn't a problem for us since we just want to order by this field.
id BIGINT PRIMARY KEY DEFAULT nextval('syncapi_stream_id'),
-- The event ID for the event
event_id TEXT NOT NULL CONSTRAINT syncapi_output_room_event_id_idx UNIQUE,
-- The 'room_id' key for the event.
room_id TEXT NOT NULL,
-- The headered JSON for the event, containing potentially additional metadata such as
-- the room version. Stored as TEXT because this should be valid UTF-8.
headered_event_json TEXT NOT NULL,
-- The event type e.g 'm.room.member'.
type TEXT NOT NULL,
-- The 'sender' property of the event.
sender TEXT NOT NULL,
-- true if the event content contains a url key.
contains_url BOOL NOT NULL,
-- A list of event IDs which represent a delta of added/removed room state. This can be NULL
-- if there is no delta.
add_state_ids TEXT[],
remove_state_ids TEXT[],
-- The client session that sent the event, if any
session_id BIGINT,
-- The transaction id used to send the event, if any
transaction_id TEXT,
-- Should the event be excluded from responses to /sync requests. Useful for
-- events retrieved through backfilling that have a position in the stream
-- that relates to the moment these were retrieved rather than the moment these
-- were emitted.
exclude_from_sync BOOL DEFAULT FALSE,
-- The history visibility before this event (1 - world_readable; 2 - shared; 3 - invited; 4 - joined)
history_visibility SMALLINT NOT NULL DEFAULT 2
);
CREATE INDEX IF NOT EXISTS syncapi_output_room_events_type_idx ON syncapi_output_room_events (type);
CREATE INDEX IF NOT EXISTS syncapi_output_room_events_sender_idx ON syncapi_output_room_events (sender);
CREATE INDEX IF NOT EXISTS syncapi_output_room_events_room_id_idx ON syncapi_output_room_events (room_id);
CREATE INDEX IF NOT EXISTS syncapi_output_room_events_exclude_from_sync_idx ON syncapi_output_room_events (exclude_from_sync);
CREATE INDEX IF NOT EXISTS syncapi_output_room_events_add_state_ids_idx ON syncapi_output_room_events ((add_state_ids IS NOT NULL));
CREATE INDEX IF NOT EXISTS syncapi_output_room_events_remove_state_ids_idx ON syncapi_output_room_events ((remove_state_ids IS NOT NULL));
CREATE INDEX IF NOT EXISTS syncapi_output_room_events_recent_events_idx ON syncapi_output_room_events (room_id, exclude_from_sync, id, sender, type);
`
const insertEventSQL = "" +
"INSERT INTO syncapi_output_room_events (" +
"room_id, event_id, headered_event_json, type, sender, contains_url, add_state_ids, remove_state_ids, session_id, transaction_id, exclude_from_sync, history_visibility" +
") VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12) " +
"ON CONFLICT ON CONSTRAINT syncapi_output_room_event_id_idx DO UPDATE SET exclude_from_sync = (excluded.exclude_from_sync AND $11) " +
"RETURNING id"
const selectEventsSQL = "" +
"SELECT event_id, id, headered_event_json, session_id, exclude_from_sync, transaction_id, history_visibility FROM syncapi_output_room_events WHERE event_id = ANY($1)"
const selectEventsWithFilterSQL = "" +
"SELECT event_id, id, headered_event_json, session_id, exclude_from_sync, transaction_id, history_visibility FROM syncapi_output_room_events WHERE event_id = ANY($1)" +
" AND ( $2::text[] IS NULL OR sender = ANY($2) )" +
" AND ( $3::text[] IS NULL OR NOT(sender = ANY($3)) )" +
" AND ( $4::text[] IS NULL OR type LIKE ANY($4) )" +
" AND ( $5::text[] IS NULL OR NOT(type LIKE ANY($5)) )" +
" AND ( $6::bool IS NULL OR contains_url = $6 )" +
" LIMIT $7"
const selectRecentEventsSQL = "" +
"SELECT event_id, id, headered_event_json, session_id, exclude_from_sync, transaction_id, history_visibility FROM syncapi_output_room_events" +
" WHERE room_id = $1 AND id > $2 AND id <= $3" +
" AND ( $4::text[] IS NULL OR sender = ANY($4) )" +
" AND ( $5::text[] IS NULL OR NOT(sender = ANY($5)) )" +
" AND ( $6::text[] IS NULL OR type LIKE ANY($6) )" +
" AND ( $7::text[] IS NULL OR NOT(type LIKE ANY($7)) )" +
" ORDER BY id DESC LIMIT $8"
// selectRecentEventsForSyncSQL contains an optimization to get the recent events for a list of rooms, using a LATERAL JOIN
// The sub select inside LATERAL () is executed for all room_ids it gets as a parameter $1
const selectRecentEventsForSyncSQL = `
WITH room_ids AS (
SELECT unnest($1::text[]) AS room_id
)
SELECT x.*
FROM room_ids,
LATERAL (
SELECT room_id, event_id, id, headered_event_json, session_id, exclude_from_sync, transaction_id, history_visibility
FROM syncapi_output_room_events recent_events
WHERE
recent_events.room_id = room_ids.room_id
AND recent_events.exclude_from_sync = FALSE
AND id > $2 AND id <= $3
AND ( $4::text[] IS NULL OR sender = ANY($4) )
AND ( $5::text[] IS NULL OR NOT(sender = ANY($5)) )
AND ( $6::text[] IS NULL OR type LIKE ANY($6) )
AND ( $7::text[] IS NULL OR NOT(type LIKE ANY($7)) )
ORDER BY recent_events.id DESC
LIMIT $8
) AS x
`
const selectMaxEventIDSQL = "" +
"SELECT MAX(id) FROM syncapi_output_room_events"
const updateEventJSONSQL = "" +
"UPDATE syncapi_output_room_events SET headered_event_json=$1 WHERE event_id=$2"
// In order for us to apply the state updates correctly, rows need to be ordered in the order they were received (id).
const selectStateInRangeFilteredSQL = "" +
"SELECT event_id, id, headered_event_json, exclude_from_sync, add_state_ids, remove_state_ids, history_visibility" +
" FROM syncapi_output_room_events" +
" WHERE (id > $1 AND id <= $2) AND (add_state_ids IS NOT NULL OR remove_state_ids IS NOT NULL)" +
" AND room_id = ANY($3)" +
" AND ( $4::text[] IS NULL OR sender = ANY($4) )" +
" AND ( $5::text[] IS NULL OR NOT(sender = ANY($5)) )" +
" AND ( $6::text[] IS NULL OR type LIKE ANY($6) )" +
" AND ( $7::text[] IS NULL OR NOT(type LIKE ANY($7)) )" +
" AND ( $8::bool IS NULL OR contains_url = $8 )" +
" ORDER BY id ASC"
// In order for us to apply the state updates correctly, rows need to be ordered in the order they were received (id).
const selectStateInRangeSQL = "" +
"SELECT event_id, id, headered_event_json, exclude_from_sync, add_state_ids, remove_state_ids, history_visibility" +
" FROM syncapi_output_room_events" +
" WHERE (id > $1 AND id <= $2) AND (add_state_ids IS NOT NULL OR remove_state_ids IS NOT NULL)" +
" AND room_id = ANY($3)" +
" ORDER BY id ASC"
const deleteEventsForRoomSQL = "" +
"DELETE FROM syncapi_output_room_events WHERE room_id = $1"
const selectContextEventSQL = "" +
"SELECT id, headered_event_json, history_visibility FROM syncapi_output_room_events WHERE room_id = $1 AND event_id = $2"
const selectContextBeforeEventSQL = "" +
"SELECT headered_event_json, history_visibility FROM syncapi_output_room_events WHERE room_id = $1 AND id < $2" +
" AND ( $4::text[] IS NULL OR sender = ANY($4) )" +
" AND ( $5::text[] IS NULL OR NOT(sender = ANY($5)) )" +
" AND ( $6::text[] IS NULL OR type LIKE ANY($6) )" +
" AND ( $7::text[] IS NULL OR NOT(type LIKE ANY($7)) )" +
" ORDER BY id DESC LIMIT $3"
const selectContextAfterEventSQL = "" +
"SELECT id, headered_event_json, history_visibility FROM syncapi_output_room_events WHERE room_id = $1 AND id > $2" +
" AND ( $4::text[] IS NULL OR sender = ANY($4) )" +
" AND ( $5::text[] IS NULL OR NOT(sender = ANY($5)) )" +
" AND ( $6::text[] IS NULL OR type LIKE ANY($6) )" +
" AND ( $7::text[] IS NULL OR NOT(type LIKE ANY($7)) )" +
" ORDER BY id ASC LIMIT $3"
const purgeEventsSQL = "" +
"DELETE FROM syncapi_output_room_events WHERE room_id = $1"
const selectSearchSQL = "SELECT id, event_id, headered_event_json FROM syncapi_output_room_events WHERE id > $1 AND type = ANY($2) ORDER BY id ASC LIMIT $3"
type outputRoomEventsStatements struct {
insertEventStmt *sql.Stmt
selectEventsStmt *sql.Stmt
selectEventsWitFilterStmt *sql.Stmt
selectMaxEventIDStmt *sql.Stmt
selectRecentEventsStmt *sql.Stmt
selectRecentEventsForSyncStmt *sql.Stmt
selectStateInRangeFilteredStmt *sql.Stmt
selectStateInRangeStmt *sql.Stmt
updateEventJSONStmt *sql.Stmt
deleteEventsForRoomStmt *sql.Stmt
selectContextEventStmt *sql.Stmt
selectContextBeforeEventStmt *sql.Stmt
selectContextAfterEventStmt *sql.Stmt
purgeEventsStmt *sql.Stmt
selectSearchStmt *sql.Stmt
}
func NewPostgresEventsTable(db *sql.DB) (tables.Events, error) {
s := &outputRoomEventsStatements{}
_, err := db.Exec(outputRoomEventsSchema)
if err != nil {
return nil, err
}
migrationName := "syncapi: rename dupe index (output_room_events)"
var cName string
err = db.QueryRowContext(context.Background(), "select constraint_name from information_schema.table_constraints where table_name = 'syncapi_output_room_events' AND constraint_name = 'syncapi_event_id_idx'").Scan(&cName)
switch err {
case sql.ErrNoRows: // migration was already executed, as the index was renamed
if err = sqlutil.InsertMigration(context.Background(), db, migrationName); err != nil {
return nil, fmt.Errorf("unable to manually insert migration '%s': %w", migrationName, err)
}
case nil:
default:
return nil, err
}
m := sqlutil.NewMigrator(db)
m.AddMigrations(
sqlutil.Migration{
Version: "syncapi: add history visibility column (output_room_events)",
Up: deltas.UpAddHistoryVisibilityColumnOutputRoomEvents,
},
sqlutil.Migration{
Version: migrationName,
Up: deltas.UpRenameOutputRoomEventsIndex,
},
)
err = m.Up(context.Background())
if err != nil {
return nil, err
}
return s, sqlutil.StatementList{
{&s.insertEventStmt, insertEventSQL},
{&s.selectEventsStmt, selectEventsSQL},
{&s.selectEventsWitFilterStmt, selectEventsWithFilterSQL},
{&s.selectMaxEventIDStmt, selectMaxEventIDSQL},
{&s.selectRecentEventsStmt, selectRecentEventsSQL},
{&s.selectRecentEventsForSyncStmt, selectRecentEventsForSyncSQL},
{&s.selectStateInRangeFilteredStmt, selectStateInRangeFilteredSQL},
{&s.selectStateInRangeStmt, selectStateInRangeSQL},
{&s.updateEventJSONStmt, updateEventJSONSQL},
{&s.deleteEventsForRoomStmt, deleteEventsForRoomSQL},
{&s.selectContextEventStmt, selectContextEventSQL},
{&s.selectContextBeforeEventStmt, selectContextBeforeEventSQL},
{&s.selectContextAfterEventStmt, selectContextAfterEventSQL},
{&s.purgeEventsStmt, purgeEventsSQL},
{&s.selectSearchStmt, selectSearchSQL},
}.Prepare(db)
}
func (s *outputRoomEventsStatements) UpdateEventJSON(ctx context.Context, txn *sql.Tx, event *rstypes.HeaderedEvent) error {
headeredJSON, err := json.Marshal(event)
if err != nil {
return err
}
_, err = sqlutil.TxStmt(txn, s.updateEventJSONStmt).ExecContext(ctx, headeredJSON, event.EventID())
return err
}
// selectStateInRange returns the state events between the two given PDU stream positions, exclusive of oldPos, inclusive of newPos.
// Results are bucketed based on the room ID. If the same state is overwritten multiple times between the
// two positions, only the most recent state is returned.
func (s *outputRoomEventsStatements) SelectStateInRange(
ctx context.Context, txn *sql.Tx, r types.Range,
stateFilter *synctypes.StateFilter, roomIDs []string,
) (map[string]map[string]bool, map[string]types.StreamEvent, error) {
var rows *sql.Rows
var err error
if stateFilter != nil {
stmt := sqlutil.TxStmt(txn, s.selectStateInRangeFilteredStmt)
senders, notSenders := getSendersStateFilterFilter(stateFilter)
rows, err = stmt.QueryContext(
ctx, r.Low(), r.High(), pq.StringArray(roomIDs),
pq.StringArray(senders),
pq.StringArray(notSenders),
pq.StringArray(filterConvertTypeWildcardToSQL(stateFilter.Types)),
pq.StringArray(filterConvertTypeWildcardToSQL(stateFilter.NotTypes)),
stateFilter.ContainsURL,
)
} else {
stmt := sqlutil.TxStmt(txn, s.selectStateInRangeStmt)
rows, err = stmt.QueryContext(
ctx, r.Low(), r.High(), pq.StringArray(roomIDs),
)
}
if err != nil {
return nil, nil, err
}
defer internal.CloseAndLogIfError(ctx, rows, "selectStateInRange: rows.close() failed")
// Fetch all the state change events for all rooms between the two positions then loop each event and:
// - Keep a cache of the event by ID (99% of state change events are for the event itself)
// - For each room ID, build up an array of event IDs which represents cumulative adds/removes
// For each room, map cumulative event IDs to events and return. This may need to a batch SELECT based on event ID
// if they aren't in the event ID cache. We don't handle state deletion yet.
eventIDToEvent := make(map[string]types.StreamEvent)
// RoomID => A set (map[string]bool) of state event IDs which are between the two positions
stateNeeded := make(map[string]map[string]bool)
for rows.Next() {
var (
eventID string
streamPos types.StreamPosition
eventBytes []byte
excludeFromSync bool
addIDs pq.StringArray
delIDs pq.StringArray
historyVisibility gomatrixserverlib.HistoryVisibility
)
if err := rows.Scan(&eventID, &streamPos, &eventBytes, &excludeFromSync, &addIDs, &delIDs, &historyVisibility); err != nil {
return nil, nil, err
}
// TODO: Handle redacted events
var ev rstypes.HeaderedEvent
if err := json.Unmarshal(eventBytes, &ev); err != nil {
return nil, nil, err
}
needSet := stateNeeded[ev.RoomID().String()]
if needSet == nil { // make set if required
needSet = make(map[string]bool)
}
for _, id := range delIDs {
needSet[id] = false
}
for _, id := range addIDs {
needSet[id] = true
}
stateNeeded[ev.RoomID().String()] = needSet
ev.Visibility = historyVisibility
eventIDToEvent[eventID] = types.StreamEvent{
HeaderedEvent: &ev,
StreamPosition: streamPos,
ExcludeFromSync: excludeFromSync,
}
}
return stateNeeded, eventIDToEvent, rows.Err()
}
// MaxID returns the ID of the last inserted event in this table. 'txn' is optional. If it is not supplied,
// then this function should only ever be used at startup, as it will race with inserting events if it is
// done afterwards. If there are no inserted events, 0 is returned.
func (s *outputRoomEventsStatements) SelectMaxEventID(
ctx context.Context, txn *sql.Tx,
) (id int64, err error) {
var nullableID sql.NullInt64
stmt := sqlutil.TxStmt(txn, s.selectMaxEventIDStmt)
err = stmt.QueryRowContext(ctx).Scan(&nullableID)
if nullableID.Valid {
id = nullableID.Int64
}
return
}
// InsertEvent into the output_room_events table. addState and removeState are an optional list of state event IDs. Returns the position
// of the inserted event.
func (s *outputRoomEventsStatements) InsertEvent(
ctx context.Context, txn *sql.Tx,
event *rstypes.HeaderedEvent, addState, removeState []string,
transactionID *api.TransactionID, excludeFromSync bool, historyVisibility gomatrixserverlib.HistoryVisibility,
) (streamPos types.StreamPosition, err error) {
var txnID *string
var sessionID *int64
if transactionID != nil {
sessionID = &transactionID.SessionID
txnID = &transactionID.TransactionID
}
// 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"]
}
var headeredJSON []byte
headeredJSON, err = json.Marshal(event)
if err != nil {
return
}
stmt := sqlutil.TxStmt(txn, s.insertEventStmt)
err = stmt.QueryRowContext(
ctx,
event.RoomID().String(),
event.EventID(),
headeredJSON,
event.Type(),
event.UserID.String(),
containsURL,
pq.StringArray(addState),
pq.StringArray(removeState),
sessionID,
txnID,
excludeFromSync,
historyVisibility,
).Scan(&streamPos)
return
}
// selectRecentEvents returns the most recent events in the given room, up to a maximum of 'limit'.
// If onlySyncEvents has a value of true, only returns the events that aren't marked as to exclude
// from sync.
func (s *outputRoomEventsStatements) SelectRecentEvents(
ctx context.Context, txn *sql.Tx,
roomIDs []string, ra types.Range, eventFilter *synctypes.RoomEventFilter,
chronologicalOrder bool, onlySyncEvents bool,
) (map[string]types.RecentEvents, error) {
var stmt *sql.Stmt
if onlySyncEvents {
stmt = sqlutil.TxStmt(txn, s.selectRecentEventsForSyncStmt)
} else {
stmt = sqlutil.TxStmt(txn, s.selectRecentEventsStmt)
}
senders, notSenders := getSendersRoomEventFilter(eventFilter)
rows, err := stmt.QueryContext(
ctx, pq.StringArray(roomIDs), ra.Low(), ra.High(),
pq.StringArray(senders),
pq.StringArray(notSenders),
pq.StringArray(filterConvertTypeWildcardToSQL(eventFilter.Types)),
pq.StringArray(filterConvertTypeWildcardToSQL(eventFilter.NotTypes)),
eventFilter.Limit+1,
)
if err != nil {
return nil, err
}
defer internal.CloseAndLogIfError(ctx, rows, "selectRecentEvents: rows.close() failed")
result := make(map[string]types.RecentEvents)
for rows.Next() {
var (
roomID string
eventID string
streamPos types.StreamPosition
eventBytes []byte
excludeFromSync bool
sessionID *int64
txnID *string
transactionID *api.TransactionID
historyVisibility gomatrixserverlib.HistoryVisibility
)
if err := rows.Scan(&roomID, &eventID, &streamPos, &eventBytes, &sessionID, &excludeFromSync, &txnID, &historyVisibility); err != nil {
return nil, err
}
// TODO: Handle redacted events
var ev rstypes.HeaderedEvent
if err := json.Unmarshal(eventBytes, &ev); err != nil {
return nil, err
}
if sessionID != nil && txnID != nil {
transactionID = &api.TransactionID{
SessionID: *sessionID,
TransactionID: *txnID,
}
}
r := result[roomID]
ev.Visibility = historyVisibility
r.Events = append(r.Events, types.StreamEvent{
HeaderedEvent: &ev,
StreamPosition: streamPos,
TransactionID: transactionID,
ExcludeFromSync: excludeFromSync,
})
result[roomID] = r
}
if chronologicalOrder {
for roomID, evs := range result {
// The events need to be returned from oldest to latest, which isn't
// necessary the way the SQL query returns them, so a sort is necessary to
// ensure the events are in the right order in the slice.
sort.SliceStable(evs.Events, func(i int, j int) bool {
return evs.Events[i].StreamPosition < evs.Events[j].StreamPosition
})
if len(evs.Events) > eventFilter.Limit {
evs.Limited = true
evs.Events = evs.Events[1:]
}
result[roomID] = evs
}
} else {
for roomID, evs := range result {
if len(evs.Events) > eventFilter.Limit {
evs.Limited = true
evs.Events = evs.Events[:len(evs.Events)-1]
}
result[roomID] = evs
}
}
return result, rows.Err()
}
// selectEvents returns the events for the given event IDs. If an event is
// missing from the database, it will be omitted.
func (s *outputRoomEventsStatements) SelectEvents(
ctx context.Context, txn *sql.Tx, eventIDs []string, filter *synctypes.RoomEventFilter, preserveOrder bool,
) ([]types.StreamEvent, error) {
var (
stmt *sql.Stmt
rows *sql.Rows
err error
)
if filter == nil {
stmt = sqlutil.TxStmt(txn, s.selectEventsStmt)
rows, err = stmt.QueryContext(ctx, pq.StringArray(eventIDs))
} else {
senders, notSenders := getSendersRoomEventFilter(filter)
stmt = sqlutil.TxStmt(txn, s.selectEventsWitFilterStmt)
rows, err = stmt.QueryContext(ctx,
pq.StringArray(eventIDs),
pq.StringArray(senders),
pq.StringArray(notSenders),
pq.StringArray(filterConvertTypeWildcardToSQL(filter.Types)),
pq.StringArray(filterConvertTypeWildcardToSQL(filter.NotTypes)),
filter.ContainsURL,
filter.Limit,
)
}
if err != nil {
return nil, err
}
defer internal.CloseAndLogIfError(ctx, rows, "selectEvents: rows.close() failed")
streamEvents, err := rowsToStreamEvents(rows)
if err != nil {
return nil, err
}
if preserveOrder {
eventMap := make(map[string]types.StreamEvent)
for _, ev := range streamEvents {
eventMap[ev.EventID()] = ev
}
var returnEvents []types.StreamEvent
for _, eventID := range eventIDs {
ev, ok := eventMap[eventID]
if ok {
returnEvents = append(returnEvents, ev)
}
}
return returnEvents, nil
}
return streamEvents, nil
}
func (s *outputRoomEventsStatements) DeleteEventsForRoom(
ctx context.Context, txn *sql.Tx, roomID string,
) (err error) {
_, err = sqlutil.TxStmt(txn, s.deleteEventsForRoomStmt).ExecContext(ctx, roomID)
return err
}
func (s *outputRoomEventsStatements) SelectContextEvent(ctx context.Context, txn *sql.Tx, roomID, eventID string) (id int, evt rstypes.HeaderedEvent, err error) {
row := sqlutil.TxStmt(txn, s.selectContextEventStmt).QueryRowContext(ctx, roomID, eventID)
var eventAsString string
var historyVisibility gomatrixserverlib.HistoryVisibility
if err = row.Scan(&id, &eventAsString, &historyVisibility); err != nil {
return 0, evt, err
}
if err = json.Unmarshal([]byte(eventAsString), &evt); err != nil {
return 0, evt, err
}
evt.Visibility = historyVisibility
return id, evt, nil
}
func (s *outputRoomEventsStatements) SelectContextBeforeEvent(
ctx context.Context, txn *sql.Tx, id int, roomID string, filter *synctypes.RoomEventFilter,
) (evts []*rstypes.HeaderedEvent, err error) {
senders, notSenders := getSendersRoomEventFilter(filter)
rows, err := sqlutil.TxStmt(txn, s.selectContextBeforeEventStmt).QueryContext(
ctx, roomID, id, filter.Limit,
pq.StringArray(senders),
pq.StringArray(notSenders),
pq.StringArray(filterConvertTypeWildcardToSQL(filter.Types)),
pq.StringArray(filterConvertTypeWildcardToSQL(filter.NotTypes)),
)
if err != nil {
return
}
defer internal.CloseAndLogIfError(ctx, rows, "rows.close() failed")
for rows.Next() {
var (
eventBytes []byte
evt *rstypes.HeaderedEvent
historyVisibility gomatrixserverlib.HistoryVisibility
)
if err = rows.Scan(&eventBytes, &historyVisibility); err != nil {
return evts, err
}
if err = json.Unmarshal(eventBytes, &evt); err != nil {
return evts, err
}
evt.Visibility = historyVisibility
evts = append(evts, evt)
}
return evts, rows.Err()
}
func (s *outputRoomEventsStatements) SelectContextAfterEvent(
ctx context.Context, txn *sql.Tx, id int, roomID string, filter *synctypes.RoomEventFilter,
) (lastID int, evts []*rstypes.HeaderedEvent, err error) {
senders, notSenders := getSendersRoomEventFilter(filter)
rows, err := sqlutil.TxStmt(txn, s.selectContextAfterEventStmt).QueryContext(
ctx, roomID, id, filter.Limit,
pq.StringArray(senders),
pq.StringArray(notSenders),
pq.StringArray(filterConvertTypeWildcardToSQL(filter.Types)),
pq.StringArray(filterConvertTypeWildcardToSQL(filter.NotTypes)),
)
if err != nil {
return
}
defer internal.CloseAndLogIfError(ctx, rows, "rows.close() failed")
for rows.Next() {
var (
eventBytes []byte
evt *rstypes.HeaderedEvent
historyVisibility gomatrixserverlib.HistoryVisibility
)
if err = rows.Scan(&lastID, &eventBytes, &historyVisibility); err != nil {
return 0, evts, err
}
if err = json.Unmarshal(eventBytes, &evt); err != nil {
return 0, evts, err
}
evt.Visibility = historyVisibility
evts = append(evts, evt)
}
return lastID, evts, rows.Err()
}
func rowsToStreamEvents(rows *sql.Rows) ([]types.StreamEvent, error) {
var result []types.StreamEvent
for rows.Next() {
var (
eventID string
streamPos types.StreamPosition
eventBytes []byte
excludeFromSync bool
sessionID *int64
txnID *string
transactionID *api.TransactionID
historyVisibility gomatrixserverlib.HistoryVisibility
)
if err := rows.Scan(&eventID, &streamPos, &eventBytes, &sessionID, &excludeFromSync, &txnID, &historyVisibility); err != nil {
return nil, err
}
// TODO: Handle redacted events
var ev rstypes.HeaderedEvent
if err := json.Unmarshal(eventBytes, &ev); err != nil {
return nil, err
}
if sessionID != nil && txnID != nil {
transactionID = &api.TransactionID{
SessionID: *sessionID,
TransactionID: *txnID,
}
}
ev.Visibility = historyVisibility
result = append(result, types.StreamEvent{
HeaderedEvent: &ev,
StreamPosition: streamPos,
TransactionID: transactionID,
ExcludeFromSync: excludeFromSync,
})
}
return result, rows.Err()
}
func (s *outputRoomEventsStatements) PurgeEvents(
ctx context.Context, txn *sql.Tx, roomID string,
) error {
_, err := sqlutil.TxStmt(txn, s.purgeEventsStmt).ExecContext(ctx, roomID)
return err
}
func (s *outputRoomEventsStatements) ReIndex(ctx context.Context, txn *sql.Tx, limit, afterID int64, types []string) (map[int64]rstypes.HeaderedEvent, error) {
rows, err := sqlutil.TxStmt(txn, s.selectSearchStmt).QueryContext(ctx, afterID, pq.StringArray(types), limit)
if err != nil {
return nil, err
}
defer internal.CloseAndLogIfError(ctx, rows, "rows.close() failed")
var eventID string
var id int64
result := make(map[int64]rstypes.HeaderedEvent)
for rows.Next() {
var ev rstypes.HeaderedEvent
var eventBytes []byte
if err = rows.Scan(&id, &eventID, &eventBytes); err != nil {
return nil, err
}
if err = json.Unmarshal(eventBytes, &ev); err != nil {
return nil, err
}
result[id] = ev
}
return result, rows.Err()
}
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