dendrite/syncapi/storage/interface.go
Kegsay b28674435e
Correctly generate backpagination tokens for events which have the same depth (#996)
* Correctly generate backpagination tokens for events which have the same depth

With tests. Unfortunately the code around here is hard to understand.
There will be a subsequent PR which fixes this up now that we have a test
harness in place.

* Add postgres impl

* More linting

* Fix psql statement so it actually works
2020-05-01 11:01:34 +01:00

111 lines
7.3 KiB
Go

// 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 storage
import (
"context"
"time"
"github.com/matrix-org/dendrite/clientapi/auth/authtypes"
"github.com/matrix-org/dendrite/common"
"github.com/matrix-org/dendrite/eduserver/cache"
"github.com/matrix-org/dendrite/roomserver/api"
"github.com/matrix-org/dendrite/syncapi/types"
"github.com/matrix-org/gomatrixserverlib"
)
type Database interface {
common.PartitionStorer
// AllJoinedUsersInRooms returns a map of room ID to a list of all joined user IDs.
AllJoinedUsersInRooms(ctx context.Context) (map[string][]string, error)
// Events lookups a list of event by their event ID.
// Returns a list of events matching the requested IDs found in the database.
// If an event is not found in the database then it will be omitted from the list.
// Returns an error if there was a problem talking with the database.
// Does not include any transaction IDs in the returned events.
Events(ctx context.Context, eventIDs []string) ([]gomatrixserverlib.HeaderedEvent, error)
// WriteEvent into the database. It is not safe to call this function from multiple goroutines, as it would create races
// when generating the sync stream position for this event. Returns the sync stream position for the inserted event.
// Returns an error if there was a problem inserting this event.
WriteEvent(ctx context.Context, ev *gomatrixserverlib.HeaderedEvent, addStateEvents []gomatrixserverlib.HeaderedEvent,
addStateEventIDs []string, removeStateEventIDs []string, transactionID *api.TransactionID, excludeFromSync bool) (types.StreamPosition, error)
// GetStateEvent returns the Matrix state event of a given type for a given room with a given state key
// If no event could be found, returns nil
// If there was an issue during the retrieval, returns an error
GetStateEvent(ctx context.Context, roomID, evType, stateKey string) (*gomatrixserverlib.HeaderedEvent, error)
// GetStateEventsForRoom fetches the state events for a given room.
// Returns an empty slice if no state events could be found for this room.
// Returns an error if there was an issue with the retrieval.
GetStateEventsForRoom(ctx context.Context, roomID string, stateFilterPart *gomatrixserverlib.StateFilter) (stateEvents []gomatrixserverlib.HeaderedEvent, err error)
// SyncPosition returns the latest positions for syncing.
SyncPosition(ctx context.Context) (types.PaginationToken, error)
// IncrementalSync returns all the data needed in order to create an incremental
// sync response for the given user. Events returned will include any client
// transaction IDs associated with the given device. These transaction IDs come
// from when the device sent the event via an API that included a transaction
// ID.
IncrementalSync(ctx context.Context, device authtypes.Device, fromPos, toPos types.PaginationToken, numRecentEventsPerRoom int, wantFullState bool) (*types.Response, error)
// CompleteSync returns a complete /sync API response for the given user.
CompleteSync(ctx context.Context, userID string, numRecentEventsPerRoom int) (*types.Response, error)
// GetAccountDataInRange returns all account data for a given user inserted or
// updated between two given positions
// Returns a map following the format data[roomID] = []dataTypes
// If no data is retrieved, returns an empty map
// If there was an issue with the retrieval, returns an error
GetAccountDataInRange(ctx context.Context, userID string, oldPos, newPos types.StreamPosition, accountDataFilterPart *gomatrixserverlib.EventFilter) (map[string][]string, error)
// UpsertAccountData keeps track of new or updated account data, by saving the type
// of the new/updated data, and the user ID and room ID the data is related to (empty)
// room ID means the data isn't specific to any room)
// If no data with the given type, user ID and room ID exists in the database,
// creates a new row, else update the existing one
// Returns an error if there was an issue with the upsert
UpsertAccountData(ctx context.Context, userID, roomID, dataType string) (types.StreamPosition, error)
// AddInviteEvent stores a new invite event for a user.
// If the invite was successfully stored this returns the stream ID it was stored at.
// Returns an error if there was a problem communicating with the database.
AddInviteEvent(ctx context.Context, inviteEvent gomatrixserverlib.HeaderedEvent) (types.StreamPosition, error)
// RetireInviteEvent removes an old invite event from the database.
// Returns an error if there was a problem communicating with the database.
RetireInviteEvent(ctx context.Context, inviteEventID string) error
// SetTypingTimeoutCallback sets a callback function that is called right after
// a user is removed from the typing user list due to timeout.
SetTypingTimeoutCallback(fn cache.TimeoutCallbackFn)
// AddTypingUser adds a typing user to the typing cache.
// Returns the newly calculated sync position for typing notifications.
AddTypingUser(userID, roomID string, expireTime *time.Time) types.StreamPosition
// RemoveTypingUser removes a typing user from the typing cache.
// Returns the newly calculated sync position for typing notifications.
RemoveTypingUser(userID, roomID string) types.StreamPosition
// GetEventsInRange retrieves all of the events on a given ordering using the
// given extremities and limit.
GetEventsInRange(ctx context.Context, from, to *types.PaginationToken, roomID string, limit int, backwardOrdering bool) (events []types.StreamEvent, err error)
// EventPositionInTopology returns the depth and stream position of the given event.
EventPositionInTopology(ctx context.Context, eventID string) (depth types.StreamPosition, stream types.StreamPosition, err error)
// EventsAtTopologicalPosition returns all of the events matching a given
// position in the topology of a given room.
EventsAtTopologicalPosition(ctx context.Context, roomID string, pos types.StreamPosition) ([]types.StreamEvent, error)
// BackwardExtremitiesForRoom returns the event IDs of all of the backward
// extremities we know of for a given room.
BackwardExtremitiesForRoom(ctx context.Context, roomID string) (backwardExtremities []string, err error)
// MaxTopologicalPosition returns the highest topological position for a given room.
MaxTopologicalPosition(ctx context.Context, roomID string) (depth types.StreamPosition, stream types.StreamPosition, err error)
// StreamEventsToEvents converts streamEvent to Event. If device is non-nil and
// matches the streamevent.transactionID device then the transaction ID gets
// added to the unsigned section of the output event.
StreamEventsToEvents(device *authtypes.Device, in []types.StreamEvent) []gomatrixserverlib.HeaderedEvent
// SyncStreamPosition returns the latest position in the sync stream. Returns 0 if there are no events yet.
SyncStreamPosition(ctx context.Context) (types.StreamPosition, error)
}