forked from mystiq/hydrogen-web
96 lines
3 KiB
TypeScript
96 lines
3 KiB
TypeScript
/*
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Copyright 2020 Bruno Windels <bruno@windels.cloud>
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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 { encodeUint32, decodeUint32 } from "../utils";
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import {KeyLimits} from "../../common";
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import {Store} from "../Store";
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import {Content} from "../../types";
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interface PendingEntry {
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roomId: string;
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queueIndex: number;
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eventType: string;
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content: Content;
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relatexTxnId: string | null;
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relatedEventId: string | null;
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txnId?: string;
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needsEncryption: boolean;
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needsUpload: boolean;
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key: string;
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}
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function encodeKey(roomId: string, queueIndex: number): string {
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return `${roomId}|${encodeUint32(queueIndex)}`;
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}
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function decodeKey(key: string): { roomId: string, queueIndex: number } {
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const [roomId, encodedQueueIndex] = key.split("|");
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const queueIndex = decodeUint32(encodedQueueIndex);
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return {roomId, queueIndex};
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}
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export class PendingEventStore {
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private _eventStore: Store<PendingEntry>;
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constructor(eventStore: Store<PendingEntry>) {
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this._eventStore = eventStore;
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}
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async getMaxQueueIndex(roomId: string): Promise<number | undefined> {
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const range = this._eventStore.IDBKeyRange.bound(
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encodeKey(roomId, KeyLimits.minStorageKey),
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encodeKey(roomId, KeyLimits.maxStorageKey),
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false,
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false,
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);
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const maxKey = await this._eventStore.findMaxKey(range);
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if (maxKey) {
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return decodeKey(maxKey as string).queueIndex;
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}
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}
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remove(roomId: string, queueIndex: number) {
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const keyRange = this._eventStore.IDBKeyRange.only(encodeKey(roomId, queueIndex));
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this._eventStore.delete(keyRange);
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}
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async exists(roomId: string, queueIndex: number): Promise<boolean> {
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const keyRange = this._eventStore.IDBKeyRange.only(encodeKey(roomId, queueIndex));
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const key = await this._eventStore.getKey(keyRange);
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return !!key;
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}
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add(pendingEvent: PendingEntry): void {
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pendingEvent.key = encodeKey(pendingEvent.roomId, pendingEvent.queueIndex);
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this._eventStore.add(pendingEvent);
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}
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update(pendingEvent: PendingEntry): void {
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this._eventStore.put(pendingEvent);
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}
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getAll(): Promise<PendingEntry[]> {
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return this._eventStore.selectAll();
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}
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removeAllForRoom(roomId: string): void {
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const minKey = encodeKey(roomId, KeyLimits.minStorageKey);
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const maxKey = encodeKey(roomId, KeyLimits.maxStorageKey);
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const range = this._eventStore.IDBKeyRange.bound(minKey, maxKey);
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this._eventStore.delete(range);
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}
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}
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