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// 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"
"encoding/json"
"github.com/matrix-org/dendrite/keyserver/api"
)
type Database interface {
// ExistingOneTimeKeys returns a map of keyIDWithAlgorithm to key JSON for the given parameters. If no keys exist with this combination
// of user/device/key/algorithm 4-uple then it is omitted from the map. Returns an error when failing to communicate with the database.
ExistingOneTimeKeys(ctx context.Context, userID, deviceID string, keyIDsWithAlgorithms []string) (map[string]json.RawMessage, error)
// StoreOneTimeKeys persists the given one-time keys.
StoreOneTimeKeys(ctx context.Context, keys api.OneTimeKeys) (*api.OneTimeKeysCount, error)
// DeviceKeysJSON populates the KeyJSON for the given keys. If any proided `keys` have a `KeyJSON` already then it will be replaced.
DeviceKeysJSON(ctx context.Context, keys []api.DeviceKeys) error
// StoreDeviceKeys persists the given keys. Keys with the same user ID and device ID will be replaced.
// Returns an error if there was a problem storing the keys.
StoreDeviceKeys(ctx context.Context, keys []api.DeviceKeys) error
// DeviceKeysForUser returns the device keys for the device IDs given. If the length of deviceIDs is 0, all devices are selected.
// If there are some missing keys, they are omitted from the returned slice. There is no ordering on the returned slice.
DeviceKeysForUser(ctx context.Context, userID string, deviceIDs []string) ([]api.DeviceKeys, error)
// ClaimKeys based on the 3-uple of user_id, device_id and algorithm name. Returns the keys claimed. Returns no error if a key
// cannot be claimed or if none exist for this (user, device, algorithm), instead it is omitted from the returned slice.
ClaimKeys(ctx context.Context, userToDeviceToAlgorithm map[string]map[string]string) ([]api.OneTimeKeys, error)
// StoreKeyChange stores key change metadata after the change has been sent to Kafka. `userID` is the the user who has changed
// their keys in some way.
StoreKeyChange(ctx context.Context, partition int32, offset int64, userID string) error
// KeyChanges returns a list of user IDs who have modified their keys from the offset given.
// Returns the offset of the latest key change.
KeyChanges(ctx context.Context, partition int32, fromOffset int64) (userIDs []string, latestOffset int64, err error)
}
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