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58 lines
2.4 KiB
Go
58 lines
2.4 KiB
Go
// Copyright 2017 Vector Creations Ltd
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// Copyright 2018 New Vector Ltd
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// Copyright 2019-2020 The Matrix.org Foundation C.I.C.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package state
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import (
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"context"
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"errors"
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"github.com/matrix-org/dendrite/roomserver/state/database"
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v1 "github.com/matrix-org/dendrite/roomserver/state/v1"
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"github.com/matrix-org/dendrite/roomserver/types"
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"github.com/matrix-org/gomatrixserverlib"
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)
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type StateResolutionVersion int
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const (
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StateResolutionAlgorithmV1 StateResolutionVersion = iota + 1
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StateResolutionAlgorithmV2
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)
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func GetStateResolutionAlgorithm(
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version StateResolutionVersion, db database.RoomStateDatabase,
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) (StateResolutionImpl, error) {
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switch version {
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case StateResolutionAlgorithmV1:
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return v1.Prepare(db), nil
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default:
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return nil, errors.New("unsupported room version")
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}
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}
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type StateResolutionImpl interface {
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LoadStateAtSnapshot(ctx context.Context, stateNID types.StateSnapshotNID) ([]types.StateEntry, error)
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LoadStateAtEvent(ctx context.Context, eventID string) ([]types.StateEntry, error)
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LoadCombinedStateAfterEvents(ctx context.Context, prevStates []types.StateAtEvent) ([]types.StateEntry, error)
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DifferenceBetweeenStateSnapshots(ctx context.Context, oldStateNID, newStateNID types.StateSnapshotNID) (removed, added []types.StateEntry, err error)
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LoadStateAtSnapshotForStringTuples(ctx context.Context, stateNID types.StateSnapshotNID, stateKeyTuples []gomatrixserverlib.StateKeyTuple) ([]types.StateEntry, error)
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LoadStateAfterEventsForStringTuples(ctx context.Context, prevStates []types.StateAtEvent, stateKeyTuples []gomatrixserverlib.StateKeyTuple) ([]types.StateEntry, error)
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CalculateAndStoreStateBeforeEvent(ctx context.Context, event gomatrixserverlib.Event, roomNID types.RoomNID) (types.StateSnapshotNID, error)
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CalculateAndStoreStateAfterEvents(ctx context.Context, roomNID types.RoomNID, prevStates []types.StateAtEvent) (types.StateSnapshotNID, error)
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}
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