stay-alive.js

/*
This file is part of Talkie -- text-to-speech browser extension button.
<https://joelpurra.com/projects/talkie/>

Copyright (c) 2016, 2017, 2018, 2019, 2020, 2021 Joel Purra <https://joelpurra.com/>

Talkie is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

Talkie is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with Talkie.  If not, see <https://www.gnu.org/licenses/>.
*/

import {
    promiseTry,
} from "../shared/promise";

import {
    eventToPromise,
} from "../frontend/shared-frontend";

import SuspensionListenerManager from "./suspension-listener-manager";

import DualLogger from "../frontend/dual-log";

const dualLogger = new DualLogger("stay-alive.js");

const suspensionListenerManager = new SuspensionListenerManager();

const startStayAliveListener = () => {
    return suspensionListenerManager.start();
};

const stopStayAliveListener = () => {
    return suspensionListenerManager.stop()
        .catch((error) => {
            dualLogger.dualLogError("stopStayAliveListener", "Swallowing error", error);

            // NOTE: swallowing errors.
            return undefined;
        });
};

const start = () => promiseTry(
    () => startStayAliveListener()
        .then(() => undefined),
);

const stop = () => promiseTry(
    // NOTE: probably won't be correctly executed as before/unload doesn't guarantee asynchronous calls.
    () => stopStayAliveListener()
        .then(() => undefined),
);

document.addEventListener("DOMContentLoaded", eventToPromise.bind(null, start));
window.addEventListener("beforeunload", eventToPromise.bind(null, stop));