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/**
* This file is part of Haketilo.
*
* Function: Caching responses from remote repositories and serving them to
* popup pages.
*
* Copyright (C) 2022 Wojtek Kosior
*
* This program 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.
*
* 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
* GNU General Public License for more details.
*
* As additional permission under GNU GPL version 3 section 7, you
* may distribute forms of that code without the copy of the GNU
* GPL normally required by section 4, provided you include this
* license notice and, in case of non-source distribution, a URL
* through which recipients can access the Corresponding Source.
* If you modify file(s) with this exception, you may extend this
* exception to your version of the file(s), but you are not
* obligated to do so. If you do not wish to do so, delete this
* exception statement from your version.
*
* As a special exception to the GPL, any HTML file which merely
* makes function calls to this code, and for that purpose
* includes it by reference shall be deemed a separate work for
* copyright law purposes. If you modify this code, you may extend
* this exception to your version of the code, but you are not
* obligated to do so. If you do not wish to do so, delete this
* exception statement from your version.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
* I, Wojtek Kosior, thereby promise not to sue for violation of this file's
* license. Although I request that you do not make use of this code in a
* proprietary program, I am not going to enforce this in court.
*/
#FROM common/browser.js IMPORT browser
/*
* Map URLs to objects containing parsed responses, error info or promises
* resolving to those.
*/
const cache = new Map();
async function perform_download(url) {
if (cache.has(url))
return cache.get(url);
let resolve_cb;
cache.set(url, new Promise(cb => resolve_cb = cb));
try {
const opts = {url, to_get: ["ok", "status"], to_call: ["json"]};
var result = await browser.runtime.sendMessage(["CORS_bypass", opts]);
if (result === undefined)
result = {error: "Couldn't communicate with background script."};
} catch(e) {
var result = {error: e + ""};
}
cache.set(url, result);
resolve_cb(result);
return result;
}
function on_repo_query_request([type, url], sender, respond_cb) {
if (type !== "repo_query")
return;
perform_download(url).then(respond_cb);
return true;
}
function start() {
browser.runtime.onMessage.addListener(on_repo_query_request);
}
#EXPORT start
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