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/**
* GNU LibreJS - A browser add-on to block nonfree nontrivial JavaScript.
*
* Copyright (C) 2018 Giorgio Maone <giorgio@maone.net>
*
* This file is part of GNU LibreJS.
*
* GNU LibreJS 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.
*
* GNU LibreJS 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 GNU LibreJS. If not, see <http://www.gnu.org/licenses/>.
*/
/*
A class to manage whitelist/blacklist operations
*/
let {ListStore} = require("../common/Storage");
class ListManager {
constructor(whitelist, blacklist, builtInHashes) {
this.lists = {whitelist, blacklist};
this.builtInHashes = new Set(builtInHashes);
}
static async move(fromList, toList, ...keys) {
await Promise.all([fromList.remove(...keys), toList.store(...keys)]);
}
async whitelist(...keys) {
await ListManager.move(this.lists.blacklist, this.lists.whitelist, ...keys);
}
async blacklist(...keys) {
await ListManager.move(this.lists.whitelist, this.lists.blacklist, ...keys);
}
async forget(...keys) {
await Promise.all(Object.values(this.lists).map(async l => await l.remove(...keys)));
}
/* key is a string representing either a URL or an optional path
with a trailing (hash).
Returns "blacklisted", "whitelisted" or defValue
*/
getStatus(key, defValue = "unknown") {
let {blacklist, whitelist} = this.lists;
let inline = ListStore.inlineItem(key);
if (inline) {
return blacklist.contains(inline)
? "blacklisted"
: whitelist.contains(inline) ? "whitelisted"
: defValue;
}
let match = key.match(/\(([^)]+)\)(?=[^()]*$)/);
if (!match) {
let url = ListStore.urlItem(key);
let site = ListStore.siteItem(key);
return (blacklist.contains(url) || ListManager.siteMatch(site, blacklist)
? "blacklisted"
: whitelist.contains(url) || ListManager.siteMatch(site, whitelist)
? "whitelisted" : defValue
);
}
let [hashItem, srcHash] = match; // (hash), hash
return blacklist.contains(hashItem) ? "blacklisted"
: this.builtInHashes.has(srcHash) || whitelist.contains(hashItem)
? "whitelisted"
: defValue;
}
/*
Matches by whole site ("http://some.domain.com/*") supporting also
wildcarded subdomains ("https://*.domain.com/*").
*/
static siteMatch(url, list) {
let site = ListStore.siteItem(url);
if (list.contains(site)) {
return site;
}
site = site.replace(/^([\w-]+:\/\/)?(\w)/, "$1*.$2");
for (;;) {
if (list.contains(site)) {
return site;
}
let oldKey = site;
site = site.replace(/(?:\*\.)*\w+(?=\.)/, "*");
if (site === oldKey) {
return null;
}
}
}
}
module.exports = { ListManager };
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