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Viewing file:     resultingClientExists.js (1.69 KB)      -rw-r--r--

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