96 lines
3.5 KiB
TypeScript
96 lines
3.5 KiB
TypeScript
/*
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Copyright 2021 The Matrix.org Foundation C.I.C.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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import {MIN_UNICODE, MAX_UNICODE} from "./common";
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import {Store} from "../Store";
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function encodeKey(roomId: string, targetEventId: string, relType: string, sourceEventId: string): string {
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return `${roomId}|${targetEventId}|${relType}|${sourceEventId}`;
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}
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interface RelationEntry {
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roomId: string;
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targetEventId: string;
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sourceEventId: string;
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relType: string;
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}
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function decodeKey(key: string): RelationEntry {
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const [roomId, targetEventId, relType, sourceEventId] = key.split("|");
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return {roomId, targetEventId, relType, sourceEventId};
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}
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export class TimelineRelationStore {
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private _store: Store<{ key: string }>;
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constructor(store: Store<{ key: string }>) {
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this._store = store;
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}
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add(roomId: string, targetEventId: string, relType: string, sourceEventId: string): void {
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this._store.add({key: encodeKey(roomId, targetEventId, relType, sourceEventId)});
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}
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remove(roomId: string, targetEventId: string, relType: string, sourceEventId: string): void {
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this._store.delete(encodeKey(roomId, targetEventId, relType, sourceEventId));
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}
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removeAllForTarget(roomId: string, targetId: string): void {
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const range = this._store.IDBKeyRange.bound(
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encodeKey(roomId, targetId, MIN_UNICODE, MIN_UNICODE),
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encodeKey(roomId, targetId, MAX_UNICODE, MAX_UNICODE),
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true,
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true
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);
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this._store.delete(range);
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}
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removeAllForRoom(roomId: string) {
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const range = this._store.IDBKeyRange.bound(
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encodeKey(roomId, MIN_UNICODE, MIN_UNICODE, MIN_UNICODE),
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encodeKey(roomId, MAX_UNICODE, MAX_UNICODE, MAX_UNICODE),
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true,
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true
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);
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this._store.delete(range);
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}
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async getForTargetAndType(roomId: string, targetId: string, relType: string): Promise<RelationEntry[]> {
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// exclude both keys as they are theoretical min and max,
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// but we should't have a match for just the room id, or room id with max
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const range = this._store.IDBKeyRange.bound(
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encodeKey(roomId, targetId, relType, MIN_UNICODE),
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encodeKey(roomId, targetId, relType, MAX_UNICODE),
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true,
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true
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);
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const items = await this._store.selectAll(range);
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return items.map(i => decodeKey(i.key));
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}
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async getAllForTarget(roomId: string, targetId: string): Promise<RelationEntry[]> {
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// exclude both keys as they are theoretical min and max,
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// but we should't have a match for just the room id, or room id with max
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const range = this._store.IDBKeyRange.bound(
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encodeKey(roomId, targetId, MIN_UNICODE, MIN_UNICODE),
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encodeKey(roomId, targetId, MAX_UNICODE, MAX_UNICODE),
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true,
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true
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);
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const items = await this._store.selectAll(range);
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return items.map(i => decodeKey(i.key));
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}
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}
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