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package shared
import (
"context"
"database/sql"
"fmt"
"github.com/matrix-org/gomatrixserverlib"
"github.com/matrix-org/dendrite/roomserver/types"
)
type RoomUpdater struct {
transaction
d *Database
roomInfo *types.RoomInfo
latestEvents []types.StateAtEventAndReference
lastEventIDSent string
currentStateSnapshotNID types.StateSnapshotNID
roomExists bool
}
func rollback(txn *sql.Tx) {
if txn == nil {
return
}
txn.Rollback() // nolint: errcheck
}
func NewRoomUpdater(ctx context.Context, d *Database, txn *sql.Tx, roomInfo *types.RoomInfo) (*RoomUpdater, error) {
// If the roomInfo is nil then that means that the room doesn't exist
// yet, so we can't do `SelectLatestEventsNIDsForUpdate` because that
// would involve locking a row on the table that doesn't exist. Instead
// we will just run with a normal database transaction. It'll either
// succeed, processing a create event which creates the room, or it won't.
if roomInfo == nil {
return &RoomUpdater{
transaction{ctx, txn}, d, nil, nil, "", 0, false,
}, nil
}
eventNIDs, lastEventNIDSent, currentStateSnapshotNID, err :=
d.RoomsTable.SelectLatestEventsNIDsForUpdate(ctx, txn, roomInfo.RoomNID)
if err != nil {
rollback(txn)
return nil, err
}
stateAndRefs, err := d.EventsTable.BulkSelectStateAtEventAndReference(ctx, txn, eventNIDs)
if err != nil {
rollback(txn)
return nil, err
}
var lastEventIDSent string
if lastEventNIDSent != 0 {
lastEventIDSent, err = d.EventsTable.SelectEventID(ctx, txn, lastEventNIDSent)
if err != nil {
rollback(txn)
return nil, err
}
}
return &RoomUpdater{
transaction{ctx, txn}, d, roomInfo, stateAndRefs, lastEventIDSent, currentStateSnapshotNID, true,
}, nil
}
// RoomExists returns true if the room exists and false otherwise.
func (u *RoomUpdater) RoomExists() bool {
return u.roomExists
}
// Implements sqlutil.Transaction
func (u *RoomUpdater) Commit() error {
if u.txn == nil { // SQLite mode probably
return nil
}
return u.txn.Commit()
}
// Implements sqlutil.Transaction
func (u *RoomUpdater) Rollback() error {
if u.txn == nil { // SQLite mode probably
return nil
}
return u.txn.Rollback()
}
// RoomVersion implements types.RoomRecentEventsUpdater
func (u *RoomUpdater) RoomVersion() (version gomatrixserverlib.RoomVersion) {
return u.roomInfo.RoomVersion
}
// LatestEvents implements types.RoomRecentEventsUpdater
func (u *RoomUpdater) LatestEvents() []types.StateAtEventAndReference {
return u.latestEvents
}
// LastEventIDSent implements types.RoomRecentEventsUpdater
func (u *RoomUpdater) LastEventIDSent() string {
return u.lastEventIDSent
}
// CurrentStateSnapshotNID implements types.RoomRecentEventsUpdater
func (u *RoomUpdater) CurrentStateSnapshotNID() types.StateSnapshotNID {
return u.currentStateSnapshotNID
}
// StorePreviousEvents implements types.RoomRecentEventsUpdater - This must be called from a Writer
func (u *RoomUpdater) StorePreviousEvents(eventNID types.EventNID, previousEventReferences []gomatrixserverlib.EventReference) error {
return u.d.Writer.Do(u.d.DB, u.txn, func(txn *sql.Tx) error {
for _, ref := range previousEventReferences {
if err := u.d.PrevEventsTable.InsertPreviousEvent(u.ctx, txn, ref.EventID, ref.EventSHA256, eventNID); err != nil {
return fmt.Errorf("u.d.PrevEventsTable.InsertPreviousEvent: %w", err)
}
}
return nil
})
}
func (u *RoomUpdater) Events(
ctx context.Context, eventNIDs []types.EventNID,
) ([]types.Event, error) {
return u.d.events(ctx, u.txn, eventNIDs)
}
func (u *RoomUpdater) SnapshotNIDFromEventID(
ctx context.Context, eventID string,
) (types.StateSnapshotNID, error) {
return u.d.snapshotNIDFromEventID(ctx, u.txn, eventID)
}
func (u *RoomUpdater) StateBlockNIDs(
ctx context.Context, stateNIDs []types.StateSnapshotNID,
) ([]types.StateBlockNIDList, error) {
return u.d.stateBlockNIDs(ctx, u.txn, stateNIDs)
}
func (u *RoomUpdater) StateEntries(
ctx context.Context, stateBlockNIDs []types.StateBlockNID,
) ([]types.StateEntryList, error) {
return u.d.stateEntries(ctx, u.txn, stateBlockNIDs)
}
func (u *RoomUpdater) StateEntriesForTuples(
ctx context.Context,
stateBlockNIDs []types.StateBlockNID,
stateKeyTuples []types.StateKeyTuple,
) ([]types.StateEntryList, error) {
return u.d.stateEntriesForTuples(ctx, u.txn, stateBlockNIDs, stateKeyTuples)
}
func (u *RoomUpdater) AddState(
ctx context.Context,
roomNID types.RoomNID,
stateBlockNIDs []types.StateBlockNID,
state []types.StateEntry,
) (stateNID types.StateSnapshotNID, err error) {
return u.d.addState(ctx, u.txn, roomNID, stateBlockNIDs, state)
}
func (u *RoomUpdater) SetState(
ctx context.Context, eventNID types.EventNID, stateNID types.StateSnapshotNID,
) error {
return u.d.Writer.Do(u.d.DB, u.txn, func(txn *sql.Tx) error {
return u.d.EventsTable.UpdateEventState(ctx, txn, eventNID, stateNID)
})
}
func (u *RoomUpdater) EventTypeNIDs(
ctx context.Context, eventTypes []string,
) (map[string]types.EventTypeNID, error) {
return u.d.eventTypeNIDs(ctx, u.txn, eventTypes)
}
func (u *RoomUpdater) EventStateKeyNIDs(
ctx context.Context, eventStateKeys []string,
) (map[string]types.EventStateKeyNID, error) {
return u.d.eventStateKeyNIDs(ctx, u.txn, eventStateKeys)
}
func (u *RoomUpdater) RoomInfo(ctx context.Context, roomID string) (*types.RoomInfo, error) {
return u.d.roomInfo(ctx, u.txn, roomID)
}
func (u *RoomUpdater) EventIDs(
ctx context.Context, eventNIDs []types.EventNID,
) (map[types.EventNID]string, error) {
return u.d.EventsTable.BulkSelectEventID(ctx, u.txn, eventNIDs)
}
func (u *RoomUpdater) BulkSelectSnapshotsFromEventIDs(ctx context.Context, eventIDs []string) (map[types.StateSnapshotNID][]string, error) {
return u.d.EventsTable.BulkSelectSnapshotsFromEventIDs(ctx, u.txn, eventIDs)
}
func (u *RoomUpdater) StateAtEventIDs(
ctx context.Context, eventIDs []string,
) ([]types.StateAtEvent, error) {
return u.d.EventsTable.BulkSelectStateAtEventByID(ctx, u.txn, eventIDs)
}
func (u *RoomUpdater) EventsFromIDs(ctx context.Context, eventIDs []string) ([]types.Event, error) {
return u.d.eventsFromIDs(ctx, u.txn, eventIDs, false)
}
func (u *RoomUpdater) UnsentEventsFromIDs(ctx context.Context, eventIDs []string) ([]types.Event, error) {
return u.d.eventsFromIDs(ctx, u.txn, eventIDs, true)
}
// IsReferenced implements types.RoomRecentEventsUpdater
func (u *RoomUpdater) IsReferenced(eventReference gomatrixserverlib.EventReference) (bool, error) {
err := u.d.PrevEventsTable.SelectPreviousEventExists(u.ctx, u.txn, eventReference.EventID, eventReference.EventSHA256)
if err == nil {
return true, nil
}
if err == sql.ErrNoRows {
return false, nil
}
return false, fmt.Errorf("u.d.PrevEventsTable.SelectPreviousEventExists: %w", err)
}
// SetLatestEvents implements types.RoomRecentEventsUpdater
func (u *RoomUpdater) SetLatestEvents(
roomNID types.RoomNID, latest []types.StateAtEventAndReference, lastEventNIDSent types.EventNID,
currentStateSnapshotNID types.StateSnapshotNID,
) error {
switch {
case len(latest) == 0:
return fmt.Errorf("cannot set latest events with no latest event references")
case currentStateSnapshotNID == 0:
return fmt.Errorf("cannot set latest events with invalid state snapshot NID")
case lastEventNIDSent == 0:
return fmt.Errorf("cannot set latest events with invalid latest event NID")
}
eventNIDs := make([]types.EventNID, len(latest))
for i := range latest {
eventNIDs[i] = latest[i].EventNID
}
return u.d.Writer.Do(u.d.DB, u.txn, func(txn *sql.Tx) error {
if err := u.d.RoomsTable.UpdateLatestEventNIDs(u.ctx, txn, roomNID, eventNIDs, lastEventNIDSent, currentStateSnapshotNID); err != nil {
return fmt.Errorf("u.d.RoomsTable.updateLatestEventNIDs: %w", err)
}
// Since it's entirely possible that this types.RoomInfo came from the
// cache, we should make sure to update that entry so that the next run
// works from live data.
if u.roomInfo != nil {
u.roomInfo.SetStateSnapshotNID(currentStateSnapshotNID)
u.roomInfo.SetIsStub(false)
}
return nil
})
}
// HasEventBeenSent implements types.RoomRecentEventsUpdater
func (u *RoomUpdater) HasEventBeenSent(eventNID types.EventNID) (bool, error) {
return u.d.EventsTable.SelectEventSentToOutput(u.ctx, u.txn, eventNID)
}
// MarkEventAsSent implements types.RoomRecentEventsUpdater
func (u *RoomUpdater) MarkEventAsSent(eventNID types.EventNID) error {
return u.d.Writer.Do(u.d.DB, u.txn, func(txn *sql.Tx) error {
return u.d.EventsTable.UpdateEventSentToOutput(u.ctx, txn, eventNID)
})
}
func (u *RoomUpdater) MembershipUpdater(targetUserNID types.EventStateKeyNID, targetLocal bool) (*MembershipUpdater, error) {
return u.d.membershipUpdaterTxn(u.ctx, u.txn, u.roomInfo.RoomNID, targetUserNID, targetLocal)
}
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