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48 lines
1.7 KiB
Text
48 lines
1.7 KiB
Text
/*
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Copyright 2019 Google LLC
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Use of this source code is governed by an MIT-style
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license that can be found in the LICENSE file or at
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https://opensource.org/licenses/MIT.
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*/
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import { timeout } from './timeout.js';
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import '../_version.js';
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const MAX_RETRY_TIME = 2000;
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/**
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* Returns a promise that resolves to a window client matching the passed
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* `resultingClientId`. For browsers that don't support `resultingClientId`
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* or if waiting for the resulting client to apper takes too long, resolve to
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* `undefined`.
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*
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* @param {string} [resultingClientId]
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* @return {Promise<Client|undefined>}
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* @private
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*/
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export async function resultingClientExists(resultingClientId) {
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if (!resultingClientId) {
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return;
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}
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let existingWindows = await self.clients.matchAll({ type: 'window' });
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const existingWindowIds = new Set(existingWindows.map((w) => w.id));
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let resultingWindow;
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const startTime = performance.now();
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// Only wait up to `MAX_RETRY_TIME` to find a matching client.
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while (performance.now() - startTime < MAX_RETRY_TIME) {
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existingWindows = await self.clients.matchAll({ type: 'window' });
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resultingWindow = existingWindows.find((w) => {
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if (resultingClientId) {
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// If we have a `resultingClientId`, we can match on that.
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return w.id === resultingClientId;
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}
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else {
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// Otherwise match on finding a window not in `existingWindowIds`.
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return !existingWindowIds.has(w.id);
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}
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});
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if (resultingWindow) {
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break;
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}
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// Sleep for 100ms and retry.
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await timeout(100);
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}
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return resultingWindow;
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}
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