package tables import ( "context" "database/sql" "github.com/matrix-org/dendrite/roomserver/api" "github.com/matrix-org/dendrite/syncapi/types" "github.com/matrix-org/gomatrixserverlib" ) type AccountData interface { InsertAccountData(ctx context.Context, txn *sql.Tx, userID, roomID, dataType string) (pos types.StreamPosition, err error) // SelectAccountDataInRange returns a map of room ID to a list of `dataType`. SelectAccountDataInRange(ctx context.Context, userID string, r types.Range, accountDataEventFilter *gomatrixserverlib.EventFilter) (data map[string][]string, err error) SelectMaxAccountDataID(ctx context.Context, txn *sql.Tx) (id int64, err error) } type Invites interface { InsertInviteEvent(ctx context.Context, txn *sql.Tx, inviteEvent gomatrixserverlib.HeaderedEvent) (streamPos types.StreamPosition, err error) DeleteInviteEvent(ctx context.Context, inviteEventID string) error // SelectInviteEventsInRange returns a map of room ID to invite events. SelectInviteEventsInRange(ctx context.Context, txn *sql.Tx, targetUserID string, r types.Range) (map[string]gomatrixserverlib.HeaderedEvent, error) SelectMaxInviteID(ctx context.Context, txn *sql.Tx) (id int64, err error) } type Events interface { SelectStateInRange(ctx context.Context, txn *sql.Tx, r types.Range, stateFilter *gomatrixserverlib.StateFilter) (map[string]map[string]bool, map[string]types.StreamEvent, error) SelectMaxEventID(ctx context.Context, txn *sql.Tx) (id int64, err error) InsertEvent(ctx context.Context, txn *sql.Tx, event *gomatrixserverlib.HeaderedEvent, addState, removeState []string, transactionID *api.TransactionID, excludeFromSync bool) (streamPos types.StreamPosition, err error) // SelectRecentEvents returns events between the two stream positions: exclusive of low and inclusive of high. // If onlySyncEvents has a value of true, only returns the events that aren't marked as to exclude from sync. // Returns up to `limit` events. SelectRecentEvents(ctx context.Context, txn *sql.Tx, roomID string, r types.Range, limit int, chronologicalOrder bool, onlySyncEvents bool) ([]types.StreamEvent, error) // SelectEarlyEvents returns the earliest events in the given room. SelectEarlyEvents(ctx context.Context, txn *sql.Tx, roomID string, r types.Range, limit int) ([]types.StreamEvent, error) SelectEvents(ctx context.Context, txn *sql.Tx, eventIDs []string) ([]types.StreamEvent, error) } // Topology keeps track of the depths and stream positions for all events. // These positions are used as types.TopologyToken when backfilling events locally. type Topology interface { // InsertEventInTopology inserts the given event in the room's topology, based on the event's depth. // `pos` is the stream position of this event in the events table, and is used to order events which have the same depth. InsertEventInTopology(ctx context.Context, txn *sql.Tx, event *gomatrixserverlib.HeaderedEvent, pos types.StreamPosition) (err error) // SelectEventIDsInRange selects the IDs of events whose depths are within a given range in a given room's topological order. // Events with `minDepth` are *exclusive*, as is the event which has exactly `minDepth`,`maxStreamPos`. // `maxStreamPos` is only used when events have the same depth as `maxDepth`, which results in events less than `maxStreamPos` being returned. // Returns an empty slice if no events match the given range. SelectEventIDsInRange(ctx context.Context, txn *sql.Tx, roomID string, minDepth, maxDepth, maxStreamPos types.StreamPosition, limit int, chronologicalOrder bool) (eventIDs []string, err error) // SelectPositionInTopology returns the depth and stream position of a given event in the topology of the room it belongs to. SelectPositionInTopology(ctx context.Context, txn *sql.Tx, eventID string) (depth, spos types.StreamPosition, err error) // SelectMaxPositionInTopology returns the event which has the highest depth, and if there are multiple, the event with the highest stream position. SelectMaxPositionInTopology(ctx context.Context, txn *sql.Tx, roomID string) (depth types.StreamPosition, spos types.StreamPosition, err error) } type CurrentRoomState interface { SelectStateEvent(ctx context.Context, roomID, evType, stateKey string) (*gomatrixserverlib.HeaderedEvent, error) SelectEventsWithEventIDs(ctx context.Context, txn *sql.Tx, eventIDs []string) ([]types.StreamEvent, error) UpsertRoomState(ctx context.Context, txn *sql.Tx, event gomatrixserverlib.HeaderedEvent, membership *string, addedAt types.StreamPosition) error DeleteRoomStateByEventID(ctx context.Context, txn *sql.Tx, eventID string) error // SelectCurrentState returns all the current state events for the given room. SelectCurrentState(ctx context.Context, txn *sql.Tx, roomID string, stateFilter *gomatrixserverlib.StateFilter) ([]gomatrixserverlib.HeaderedEvent, error) // SelectRoomIDsWithMembership returns the list of room IDs which have the given user in the given membership state. SelectRoomIDsWithMembership(ctx context.Context, txn *sql.Tx, userID string, membership string) ([]string, error) // SelectJoinedUsers returns a map of room ID to a list of joined user IDs. SelectJoinedUsers(ctx context.Context) (map[string][]string, error) } // BackwardsExtremities keeps track of backwards extremities for a room. // Backwards extremities are the earliest (DAG-wise) known events which we have // the entire event JSON. These event IDs are used in federation requests to fetch // even earlier events. // // We persist the previous event IDs as well, one per row, so when we do fetch even // earlier events we can simply delete rows which referenced it. Consider the graph: // A // | Event C has 1 prev_event ID: A. // B C // |___| Event D has 2 prev_event IDs: B and C. // | // D // The earliest known event we have is D, so this table has 2 rows. // A backfill request gives us C but not B. We delete rows where prev_event=C. This // still means that D is a backwards extremity as we do not have event B. However, event // C is *also* a backwards extremity at this point as we do not have event A. Later, // when we fetch event B, we delete rows where prev_event=B. This then removes D as // a backwards extremity because there are no more rows with event_id=B. type BackwardsExtremities interface { // InsertsBackwardExtremity inserts a new backwards extremity. InsertsBackwardExtremity(ctx context.Context, txn *sql.Tx, roomID, eventID string, prevEventID string) (err error) // SelectBackwardExtremitiesForRoom retrieves all backwards extremities for the room, as a map of event_id to list of prev_event_ids. SelectBackwardExtremitiesForRoom(ctx context.Context, roomID string) (bwExtrems map[string][]string, err error) // DeleteBackwardExtremity removes a backwards extremity for a room, if one existed. DeleteBackwardExtremity(ctx context.Context, txn *sql.Tx, roomID, knownEventID string) (err error) }