Haketilo

 * Copyright (C) 2021, 2022 Wojtek Kosior

/* Use promises for sendMessage(). */

function response_cb(resolve, reject, response) {

    if (arguments.length < 3)

	reject(chrome.runtime.lastError);

    else

	resolve(response);

}

function replacement_sendMessage(old_sendMessage, ...args) {

    let callbacks, prom = new Promise((...cbs) => callbacks = cbs);

    old_sendMessage(...args, resp => response_cb(...callbacks, resp));

    return prom;

}

for (const api_object of [chrome.tabs, chrome.runtime].filter(a => a)) {

    const old_sendMessage = api_object.sendMessage;

    api_object.sendMessage =

	(...args) => replacement_sendMessage(old_sendMessage, ...args);

}