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index.js
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index.js
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require('./instrument')
const express = require('express');
const expressWs = require('express-ws');
const { Mwn } = require('mwn');
const basicAuth = require('express-basic-auth');
const secure = require('express-force-https');
const got = require('grb');
const path = require('path');
const { collectDefaultMetrics, register } = require('prom-client');
const Sentry = require('@sentry/node');
const lodash = require('lodash');
const { app } = expressWs(express());
require('merida').init();
collectDefaultMetrics({
label: {
name: 'nora'
}
});
const searchResults = (page, query) => {
if (!page.revisions) {
console.warn('Page doesn\'t have revisions', page);
return false;
}
const { content } = page.revisions[0].slots.main;
if (query.startsWith('/')) {
const parts = query.match(/\/(.*)\/(?!.*\/)(.*)/);
return new RegExp(parts[1], parts[2]).test(content);
}
return content.includes(query);
};
const getPages = async (bot, namespace, ws) => {
let results = [];
for await (const json of bot.continuedQueryGen({
action: 'query',
generator: 'allpages',
gapnamespace: namespace,
prop: 'revisions',
rvprop: 'content',
rvslots: 'main'
})) {
if (ws.readyState !== 1) {
console.log('stopping');
break;
}
if (json.query?.pages) {
results = results.concat(json.query.pages);
}
}
return results;
};
//https://stackoverflow.com/a/40486595
const mergeByName = arr => lodash(arr)
.groupBy(item => item.pageid)
.map(group => lodash.mergeWith(...[{}].concat(group, (obj, src) => {
if (Array.isArray(obj)) {
return obj.concat(src);
}
})))
.values()
.value();
app.get('/metrics', async (req, res) => {
try {
res.set('Content-Type', register.contentType);
res.end(await register.metrics());
} catch (err) {
res.status(500).end(err);
}
});
app.use(secure);
app.use(basicAuth({
users: {
admin: process.env.PASSWORD
},
challenge: true
}));
app.use(express.static('public', {
maxAge: '3600000'
}));
app.get('/', (req, res) => {
res.sendFile(path.resolve('/public/index.html'));
});
app.get('/search', (req, res) => {
res.redirect('/');
});
app.ws('/search', ws => {
ws.on('message', async msg => {
try {
JSON.parse(msg);
} catch {
ws.close(1008, 'Invalid message');
return;
}
const message = JSON.parse(msg);
if (!message.wiki || !message.query) {
ws.close(1008, 'no wiki or query provided');
return;
}
let wiki = null;
if (message.wiki.includes('.')) {
wiki = message.wiki.split('.')[1] + '.fandom.com/' + message.wiki.split('.')[0];
} else {
wiki = message.wiki + '.fandom.com';
}
try {
await got.head(`https://${wiki}/api.php`, {
headers: {
'user-agent': 'Nora - Contact Sophiedp if issue - https://youtu.be/e35AQK014tI'
}
});
} catch (error) {
ws.close(1008, `wiki check request returned ${error.response.statusCode}`);
return;
}
ws.send(JSON.stringify({
msg: 'ack'
}));
const bot = new Mwn({
apiUrl: `https://${wiki}/api.php`,
userAgent: 'Nora - Contact Sophiedp if issue - https://youtu.be/e35AQK014tI'
});
for (const ns of [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 828, 829]) {
if (ws.readyState !== 1) {
console.log('stopping');
break;
}
const results = await getPages(bot, ns, ws);
if (ws.readyState !== 1) {
console.log('stopping');
break;
}
const pages = mergeByName(results);
if (ws.readyState !== 1) {
console.log('stopping');
break;
}
for (const page of pages.filter(page => searchResults(page, message.query))) {
if (ws.readyState !== 1) {
console.log('stopping');
break;
}
ws.send(JSON.stringify({
msg: 'result',
url: `https://${wiki}/wiki/${page.title}`,
title: page.title
}));
}
}
ws.send(JSON.stringify({
msg: 'done'
}));
ws.close(1000, 'done');
});
const heartbeat = setInterval(() => {
switch (ws.readyState) {
case 0:
break;
case 1:
ws.ping();
break;
case 2:
case 3:
clearInterval(heartbeat);
break;
}
}, 20000);
});
Sentry.setupExpressErrorHandler(app);
app.listen(process.env.PORT || 8080, function () {
console.log('Listening!');
});