/**
 * This file is part of Haketilo.
 *
 * Function: Export the browser API object.
 *
 * Copyright (C) 2021, 2022 Wojtek Kosior
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the CC0 1.0 Universal License as published by
 * the Creative Commons Corporation.
 *
 * This program 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
 * CC0 1.0 Universal License for more details.
 */

#IF MOZILLA

#EXPORT  globalThis.browser  AS browser

#ELIF CHROMIUM

/* 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);
}

#EXPORT  chrome  AS browser

#ENDIF