56 lines
1.3 KiB
TypeScript
56 lines
1.3 KiB
TypeScript
// Copyright 2021 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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import { clearTimeoutIfNecessary } from './clearTimeoutIfNecessary';
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export type WaitForOnlineOptionsType = Readonly<{
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server?: Readonly<{ isOnline: () => boolean | undefined }>;
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events?: {
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on: (event: 'online', fn: () => void) => void;
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off: (event: 'online', fn: () => void) => void;
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};
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timeout?: number;
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}>;
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export function waitForOnline({
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server: maybeServer,
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events = window.Whisper.events,
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timeout,
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}: WaitForOnlineOptionsType = {}): Promise<void> {
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return new Promise((resolve, reject) => {
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let server = maybeServer;
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if (server === undefined) {
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({ server } = window.textsecure);
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if (!server) {
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reject(new Error('waitForOnline: no textsecure server'));
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return;
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}
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}
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if (server.isOnline()) {
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resolve();
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return;
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}
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let timeoutId: undefined | ReturnType<typeof setTimeout>;
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const listener = () => {
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cleanup();
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resolve();
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};
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const cleanup = () => {
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events.off('online', listener);
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clearTimeoutIfNecessary(timeoutId);
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};
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events.on('online', listener);
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if (timeout !== undefined) {
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timeoutId = setTimeout(() => {
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cleanup();
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reject(new Error('waitForOnline: did not come online in time'));
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}, timeout);
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}
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});
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}
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