@aws-amplify/core/dist/esm/Reachability/Reachability.mjs

Core category of aws-amplify

import { from, Observable } from 'rxjs';
import '../utils/getClientInfo/getClientInfo.mjs';
import { isWebWorker } from '../utils/isWebWorker.mjs';
import '../utils/retry/retry.mjs';

// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
class Reachability {
    networkMonitor(_) {
        const globalObj = isWebWorker()
            ? self
            : typeof window !== 'undefined' && window;
        if (!globalObj) {
            return from([{ online: true }]);
        }
        return new Observable(observer => {
            observer.next({ online: globalObj.navigator.onLine });
            const notifyOnline = () => {
                observer.next({ online: true });
            };
            const notifyOffline = () => {
                observer.next({ online: false });
            };
            globalObj.addEventListener('online', notifyOnline);
            globalObj.addEventListener('offline', notifyOffline);
            Reachability._observers.push(observer);
            return () => {
                globalObj.removeEventListener('online', notifyOnline);
                globalObj.removeEventListener('offline', notifyOffline);
                Reachability._observers = Reachability._observers.filter(_observer => _observer !== observer);
            };
        });
    }
    // expose observers to simulate offline mode for integration testing
    static _observerOverride(status) {
        for (const observer of this._observers) {
            if (observer.closed) {
                this._observers = this._observers.filter(_observer => _observer !== observer);
                continue;
            }
            observer?.next && observer.next(status);
        }
    }
}
Reachability._observers = [];

export { Reachability };
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