71 lines
2.0 KiB
TypeScript
71 lines
2.0 KiB
TypeScript
// Copyright 2021 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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import { debounce, isNumber } from 'lodash';
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import { strictAssert } from './assert';
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import Data from '../sql/Client';
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import * as log from '../logging/log';
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let receivedAtCounter: number | undefined;
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export async function initializeMessageCounter(): Promise<void> {
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strictAssert(
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receivedAtCounter === undefined,
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'incrementMessageCounter: already initialized'
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);
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const storedCounter = Number(localStorage.getItem('lastReceivedAtCounter'));
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const dbCounter = await Data.getMaxMessageCounter();
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if (isNumber(dbCounter) && isNumber(storedCounter)) {
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log.info('initializeMessageCounter: picking max of db/stored counters');
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receivedAtCounter = Math.max(dbCounter, storedCounter);
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if (receivedAtCounter !== storedCounter) {
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log.warn('initializeMessageCounter: mismatch between db/stored counters');
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}
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} else if (isNumber(storedCounter)) {
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log.info('initializeMessageCounter: picking stored counter');
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receivedAtCounter = storedCounter;
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} else if (isNumber(dbCounter)) {
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log.info(
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'initializeMessageCounter: picking fallback counter from the database'
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);
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receivedAtCounter = dbCounter;
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} else {
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log.info('initializeMessageCounter: defaulting to Date.now()');
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receivedAtCounter = Date.now();
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}
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if (storedCounter !== receivedAtCounter) {
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localStorage.setItem('lastReceivedAtCounter', String(receivedAtCounter));
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}
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}
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export function incrementMessageCounter(): number {
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strictAssert(
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receivedAtCounter !== undefined,
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'incrementMessageCounter: not initialized'
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);
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receivedAtCounter += 1;
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debouncedUpdateLastReceivedAt();
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return receivedAtCounter;
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}
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export function flushMessageCounter(): void {
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debouncedUpdateLastReceivedAt.flush();
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}
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const debouncedUpdateLastReceivedAt = debounce(
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() => {
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localStorage.setItem('lastReceivedAtCounter', String(receivedAtCounter));
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},
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25,
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{
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maxWait: 25,
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}
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);
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