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safer-indie-wiki-buddy
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safer-indie-wiki-buddy/background.js

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JavaScript
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// onBeforeNavigate captures right before navigation to a new page starts;
// onCreatedNavigationTarget captures new tabs/windows;
// onCommitted captures after onBeforeNavigate, used to catch redirects.
chrome.webNavigation.onBeforeNavigate.addListener(event => main(event, 'onBeforeNavigation'));
chrome.webNavigation.onCreatedNavigationTarget.addListener(event => main(event, 'onCreatedNavigationTarget'));
chrome.webNavigation.onCommitted.addListener(event => main(event, 'onCommitted'));
// Listen for user turning extension on or off, to update icon
chrome.runtime.onMessage.addListener(function (msg, sender, sendResponse) {
if (msg.action === "updateIcon") {
setPowerIcon(msg.value);
}
});
// Listen for browser starting, to set initial icon state
chrome.runtime.onStartup.addListener(function () {
chrome.storage.local.get({ 'power': 'on' }, function (item) {
setPowerIcon(item.power);
});
});
// Listen for extension installed/updating, to set initial icon state
chrome.runtime.onInstalled.addListener(function () {
chrome.storage.local.get({ 'power': 'on' }, function (item) {
setPowerIcon(item.power);
});
});
if (chrome.declarativeNetRequest) {
// In Manifest v3:
// Whenever stored settings change, update the header
// that is sent to BreezeWiki instances to inform them the user has IWB
updateDeclarativeRule();
chrome.storage.onChanged.addListener(event => updateDeclarativeRule());
} else {
// In Manifest v2:
// On main frame BreezeWiki requests, update the header
// that is sent to BreezeWiki instances to inform them the user has IWB
chrome.webRequest.onBeforeSendHeaders.addListener(async (details) =>
addHeaderToRequest(details),
{
urls: [
'*://breezewiki.com/*',
'*://antifandom.com/*',
'*://bw.projectsegfau.lt/*',
'*://breeze.hostux.net/*',
'*://breezewiki.pussthecat.org/*',
'*://bw.vern.cc/*',
'*://breezewiki.esmailelbob.xyz/*',
'*://bw.artemislena.eu/*',
'*://bw.hamstro.dev/*',
'*://nerd.whatever.social/*',
'*://breeze.nohost.network/*',
'*://breeze.whateveritworks.org/*'
],
types: [
'main_frame'
]
},
["blocking", "requestHeaders"]
);
}
function setPowerIcon(status) {
const manifestVersion = chrome.runtime.getManifest().manifest_version;
if (status === 'on') {
if (manifestVersion === 2) {
chrome.browserAction.setIcon({ path: "/images/logo-128.png" });
} else {
chrome.action.setIcon({ path: "/images/logo-128.png" });
}
} else {
if (manifestVersion === 2) {
chrome.browserAction.setIcon({ path: "/images/logo-off.png" });
} else {
chrome.action.setIcon({ path: "/images/logo-off.png" });
}
}
}
function addHeaderToRequest(details) {
return new Promise((resolve) => {
chrome.storage.local.get(async (localStorage) => {
await chrome.storage.sync.get((syncStorage) => {
const storage = { ...syncStorage, ...localStorage };
const headerValue = JSON.stringify({
'power': storage.power,
'breezewiki': storage.breezewiki
});
details.requestHeaders.push({ name: 'x-indie-wiki', value: headerValue });
resolve({ requestHeaders: details.requestHeaders });
});
});
});
}
function updateDeclarativeRule() {
chrome.storage.local.get(function (localStorage) {
chrome.storage.sync.get(function (syncStorage) {
const storage = { ...syncStorage, ...localStorage };
const headerValue = JSON.stringify({
'power': storage.power ?? 'on',
'breezewiki': storage.breezewiki ?? 'off'
});
chrome.declarativeNetRequest.updateDynamicRules({
removeRuleIds: [1],
addRules: [
{
"id": 1,
"priority": 1,
"action": {
"type": "modifyHeaders",
"requestHeaders": [
{
"operation": "set",
"header": "x-indie-wiki",
"value": headerValue
}
]
},
"condition": {
"requestDomains": [
"breezewiki.com",
"antifandom.com",
"bw.projectsegfau.lt",
"breeze.hostux.net",
"breezewiki.pussthecat.org",
"bw.vern.cc",
"breezewiki.esmailelbob.xyz",
"bw.artemislena.eu",
"bw.hamstro.dev",
"nerd.whatever.social",
"breeze.nohost.network",
"breeze.whateveritworks.org"
],
"resourceTypes": [
"main_frame"
]
}
}
]
});
});
});
}
function redirectToBreezeWiki(storage, eventInfo, url) {
function processRedirect(host) {
const subdomain = url.hostname.split(".")[0];
const article = url.href.split('fandom.com/wiki/')[1].replaceAll('%20', '_');
if (article) {
chrome.tabs.update(eventInfo.tabId, { url: host + '/' + subdomain + '/wiki/' + article });
} else {
chrome.tabs.update(eventInfo.tabId, { url: host + '/' + subdomain });
}
if (eventInfo.frameId === 0) {
chrome.storage.sync.set({ 'countBreezeWiki': (storage.countBreezeWiki ?? 0) + 1 });
}
if ((storage.notifications ?? 'on') === 'on') {
// Notify that user is being redirected to BreezeWiki
let notifID = 'independent-wiki-redirector-notification-' + Math.floor(Math.random() * 1E16);
chrome.notifications.create(notifID, {
"type": "basic",
"iconUrl": 'images/logo-48.png',
"title": "You've been redirected to BreezeWiki!",
"message": "Indie Wiki Buddy has sent you to BreezeWiki for a cleaner, ad-free experience on Fandom."
});
// Self-clear notification after 6 seconds:
setTimeout(function () { chrome.notifications.clear(notifID); }, 6000);
}
}
if (url.href.includes('fandom.com/wiki/')) {
if (!(storage.breezewikiHost ?? null)) {
fetch('https://bw.getindie.wiki/instances.json')
.then((response) => {
if (response.ok) {
return response.json();
}
throw new Error('Indie Wiki Buddy failed to get BreezeWiki data.');
}).then((breezewikiHosts) => {
breezewikiHosts = breezewikiHosts.filter(host =>
chrome.runtime.getManifest().version.localeCompare(host.iwb_version,
undefined,
{ numeric: true, sensitivity: 'base' }
) >= 0
);
// Check if BreezeWiki's main site is available
let breezewikiMain = breezewikiHosts.filter(host => host.instance === 'https://breezewiki.com');
if (breezewikiMain.length > 0) {
chrome.storage.sync.set({ 'breezewikiHost': breezewikiMain[0].instance });
} else {
// If BreezeWiki.com is not available, set to a random mirror
try {
chrome.storage.sync.set({ 'breezewikiHost': breezewikiHosts[Math.floor(Math.random() * breezewikiHosts.length)].instance });
} catch (e) {
console.log('Indie Wiki Buddy failed to get BreezeWiki data: ' + e);
}
}
chrome.storage.sync.set({ 'breezewikiHostOptions': breezewikiHosts });
chrome.storage.sync.set({ 'breezewikiHostFetchTimestamp': Date.now() });
processRedirect(host);
}).catch((e) => {
console.log('Indie Wiki Buddy failed to get BreezeWiki data: ' + e);
chrome.storage.sync.set({ 'breezewikiHost': 'https://breezewiki.com'});
});
} else {
processRedirect(storage.breezewikiHost);
}
}
}
// Load website data:
async function getData() {
const LANGS = ["DE", "EN", "ES", "FR", "IT", "PL", "TOK"];
let sites = [];
let promises = [];
for (let i = 0; i < LANGS.length; i++) {
promises.push(fetch(chrome.runtime.getURL('data/sites' + LANGS[i] + '.json'))
.then((resp) => resp.json())
.then(function (jsonData) {
jsonData.forEach((site) => {
site.origins.forEach((origin) => {
sites.push({
"id": site.id,
"origin": origin.origin,
"origin_base_url": origin.origin_base_url,
"origin_content_path": origin.origin_content_path,
"destination": site.destination,
"destination_base_url": site.destination_base_url,
"destination_content_path": site.destination_content_path,
"destination_content_prefix": (site.destination_content_prefix ? site.destination_content_prefix : ""),
"destination_platform": site.destination_platform,
"destination_icon": site.destination_icon,
"lang": LANGS[i]
})
})
});
}));
}
await Promise.all(promises);
return sites;
}
async function main(eventInfo, eventName) {
// Create object prototypes for getting and setting attributes:
Object.prototype.get = function (prop) {
this[prop] = this[prop] || {};
return this[prop];
};
Object.prototype.set = function (prop, value) {
this[prop] = value;
}
// Store tab URL and remove any search parameters and section anchors:
const url = new URL(eventInfo.url.replace(/(\?|#).*/i, ''));
// Check if tabId is > 0 (some background events may have tabId < 0)
// & check for fandom.com in hostname and quit early if it's not:
if (eventInfo.tabId > 0 && (url.hostname.includes('.fandom.com') || url.hostname.includes('wiki.fextralife.com'))) {
// Check if tab is actually available
// This is mainly to prevent background processes from triggering an event
chrome.tabs.get(eventInfo.tabId, async function (tab) {
if (tab) {
let sites = [];
sites = await getData();
chrome.storage.local.get(function (localStorage) {
chrome.storage.sync.get(function (syncStorage) {
const storage = { ...syncStorage, ...localStorage };
if ((storage.power ?? 'on') === 'on') {
// Check if site is in our list of wikis:
let matchingSites = sites.filter(el => url.href.replace(/^https?:\/\//, '').startsWith(el.origin_base_url));
if (matchingSites.length > 0) {
// Select match with longest base URL
let closestMatch = "";
matchingSites.forEach(site => {
if (site.origin_base_url.length > closestMatch.length) {
closestMatch = site.origin_base_url;
}
});
let site = matchingSites.find(site => site.origin_base_url === closestMatch);
if (site) {
// Get user's settings for the wiki
let settings = storage.siteSettings || {};
let id = site['id'];
let siteSetting = '';
if (settings.hasOwnProperty(id) && settings[id].hasOwnProperty('action')) {
siteSetting = settings[id].action;
} else if (storage.defaultActionSettings && storage.defaultActionSettings[site.language]) {
siteSetting = storage.defaultActionSettings[site.language];
} else {
siteSetting = 'alert';
}
// Check if redirects are enabled for the site:
if (siteSetting === 'redirect') {
// Get article name from the end of the URL;
// We can't just take the last part of the path due to subpages;
// Instead, we take everything after the wiki's base URL + content path:
let article = url.href.split(site['origin_base_url'] + site['origin_content_path'])[1];
// Set up URL to redirect user to based on wiki platform:
if (article || (!article && !url.href.split(site['origin_base_url'] + '/')[1])) {
let newURL = '';
if (article) {
let searchParams = '';
switch (site['destination_platform']) {
case 'mediawiki':
searchParams = 'Special:Search/' + site['destination_content_prefix'] + article;
break;
case 'doku':
searchParams = 'start?do=search&q=' + article;
break;
}
newURL = 'https://' + site["destination_base_url"] + site["destination_content_path"] + searchParams;
} else {
newURL = 'https://' + site["destination_base_url"];
}
// Perform redirect:
chrome.tabs.update(eventInfo.tabId, { url: newURL });
// Increase global redirect count:
if (eventInfo.frameId === 0) {
chrome.storage.sync.set({ 'countRedirects': (storage.countRedirects ?? 0) + 1 });
}
// Notify if enabled
if ((storage.notifications ?? 'on') === 'on') {
// Notify that user is being redirected
let notifID = 'independent-wiki-redirector-notification-' + Math.floor(Math.random() * 1E16);
chrome.notifications.create(notifID, {
"type": "basic",
"iconUrl": 'images/logo-48.png',
"title": "You've been redirected!",
"message": "Indie Wiki Buddy has sent you from " + site['origin'] + " to " + site['destination']
});
// Self-clear notification after 6 seconds:
setTimeout(function () { chrome.notifications.clear(notifID); }, 6000);
}
}
} else if ((storage.breezewiki ?? 'off') === 'on') {
redirectToBreezeWiki(storage, eventInfo, url);
}
}
} else if ((storage.breezewiki ?? 'off') === 'on') {
redirectToBreezeWiki(storage, eventInfo, url);
}
}
});
});
}
});
}
}
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