87 lines
2.6 KiB
TypeScript
87 lines
2.6 KiB
TypeScript
// Copyright 2021 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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import { assertDev, strictAssert } from '../util/assert';
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import * as log from '../logging/log';
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import type { StorageInterface } from '../types/Storage.d';
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export class OurProfileKeyService {
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private getPromise: undefined | Promise<undefined | Uint8Array>;
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private promisesBlockingGet: Array<Promise<unknown>> = [];
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private storage?: StorageInterface;
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initialize(storage: StorageInterface): void {
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log.info('Our profile key service: initializing');
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const storageReadyPromise = new Promise<void>(resolve => {
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storage.onready(() => {
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resolve();
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});
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});
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// eslint-disable-next-line @typescript-eslint/no-floating-promises
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this.promisesBlockingGet = [storageReadyPromise];
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this.storage = storage;
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}
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get(): Promise<undefined | Uint8Array> {
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if (this.getPromise) {
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log.info(
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'Our profile key service: was already fetching. Piggybacking off of that'
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);
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} else {
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log.info('Our profile key service: kicking off a new fetch');
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this.getPromise = this.doGet();
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}
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return this.getPromise;
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}
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async set(newValue: undefined | Uint8Array): Promise<void> {
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assertDev(this.storage, 'OurProfileKeyService was not initialized');
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if (newValue != null) {
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strictAssert(
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newValue.byteLength > 0,
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'Our profile key service: Profile key cannot be empty'
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);
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log.info('Our profile key service: updating profile key');
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await this.storage.put('profileKey', newValue);
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} else {
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log.info('Our profile key service: removing profile key');
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await this.storage.remove('profileKey');
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}
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}
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blockGetWithPromise(promise: Promise<unknown>): void {
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this.promisesBlockingGet.push(promise);
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}
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private async doGet(): Promise<undefined | Uint8Array> {
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log.info(
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`Our profile key service: waiting for ${this.promisesBlockingGet.length} promises before fetching`
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);
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await Promise.allSettled(this.promisesBlockingGet);
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this.promisesBlockingGet = [];
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delete this.getPromise;
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assertDev(this.storage, 'OurProfileKeyService was not initialized');
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log.info('Our profile key service: fetching profile key from storage');
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const result = this.storage.get('profileKey');
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if (result === undefined || result instanceof Uint8Array) {
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return result;
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}
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assertDev(
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false,
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'Profile key in storage was defined, but not an Uint8Array. Returning undefined'
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);
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return undefined;
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}
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}
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export const ourProfileKeyService = new OurProfileKeyService();
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