107 lines
3.2 KiB
TypeScript
107 lines
3.2 KiB
TypeScript
// Copyright 2016-2022 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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import { debounce } from 'lodash';
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import type { MessageModel } from '../models/messages';
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import { clearTimeoutIfNecessary } from '../util/clearTimeoutIfNecessary';
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class ExpiringMessagesDeletionService {
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public update: typeof this.checkExpiringMessages;
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private timeout?: ReturnType<typeof setTimeout>;
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constructor() {
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this.update = debounce(this.checkExpiringMessages, 1000);
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}
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private async destroyExpiredMessages() {
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try {
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window.SignalContext.log.info(
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'destroyExpiredMessages: Loading messages...'
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);
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const messages = await window.Signal.Data.getExpiredMessages();
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window.SignalContext.log.info(
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`destroyExpiredMessages: found ${messages.length} messages to expire`
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);
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const messageIds: Array<string> = [];
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const inMemoryMessages: Array<MessageModel> = [];
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const messageCleanup: Array<Promise<void>> = [];
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messages.forEach(dbMessage => {
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const message = window.MessageController.register(
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dbMessage.id,
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dbMessage
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);
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messageIds.push(message.id);
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inMemoryMessages.push(message);
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messageCleanup.push(message.cleanup());
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});
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// We delete after the trigger to allow the conversation time to process
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// the expiration before the message is removed from the database.
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await window.Signal.Data.removeMessages(messageIds);
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await Promise.all(messageCleanup);
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inMemoryMessages.forEach(message => {
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window.SignalContext.log.info('Message expired', {
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sentAt: message.get('sent_at'),
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});
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const conversation = message.getConversation();
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if (conversation) {
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// An expired message only counts as decrementing the message count, not
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// the sent message count
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conversation.decrementMessageCount();
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}
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});
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} catch (error) {
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window.SignalContext.log.error(
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'destroyExpiredMessages: Error deleting expired messages',
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error && error.stack ? error.stack : error
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);
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}
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window.SignalContext.log.info('destroyExpiredMessages: complete');
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this.update();
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}
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private async checkExpiringMessages() {
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window.SignalContext.log.info(
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'checkExpiringMessages: checking for expiring messages'
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);
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const soonestExpiry = await window.Signal.Data.getSoonestMessageExpiry();
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if (!soonestExpiry) {
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window.SignalContext.log.info(
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'checkExpiringMessages: found no messages to expire'
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);
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return;
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}
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let wait = soonestExpiry - Date.now();
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// In the past
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if (wait < 0) {
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wait = 0;
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}
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// Too far in the future, since it's limited to a 32-bit value
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if (wait > 2147483647) {
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wait = 2147483647;
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}
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window.SignalContext.log.info(
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`checkExpiringMessages: next message expires ${new Date(
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soonestExpiry
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).toISOString()}; waiting ${wait} ms before clearing`
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);
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clearTimeoutIfNecessary(this.timeout);
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this.timeout = setTimeout(this.destroyExpiredMessages.bind(this), wait);
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}
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}
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export const expiringMessagesDeletionService =
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new ExpiringMessagesDeletionService();
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