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