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import express from 'express';
import path from 'path';
import crypto from 'crypto';
import { songs } from './data/songs';
import { startDate } from './data/startDate';
import cors from 'cors';
const app = express();
app.use(cors());
app.use(express.json());
const SERVER_PORT = process.env.SERVER_PORT || 3001;
const SALT = process.env.REACT_APP_HEARDLE_SALT ?? 'changeme';
function getDailyKey(): Buffer {
const date = new Date().toISOString().split('T')[0];
return crypto.pbkdf2Sync(date, SALT, 100_000, 32, 'sha256');
}
app.get('/today', (_req, res) => {
const msInDay = 86_400_000;
const index = Math.floor((Date.now() - startDate.getTime()) / msInDay);
const song = songs[index % songs.length];
const key = getDailyKey();
const iv = crypto.randomBytes(12);
const cipher = crypto.createCipheriv('aes-256-gcm', key, iv);
const encrypted = Buffer.concat([
cipher.update(JSON.stringify(song), 'utf8'),
cipher.final(),
]);
res.json({
iv: iv.toString('hex'),
tag: cipher.getAuthTag().toString('hex'),
data: encrypted.toString('hex'),
});
});
app.get('/songs', (_req, res) => {
res.json(songs.map(({ artist, name }) => ({ artist, name })));
});
app.get('/info', (_req, res) => {
res.json({ startDate: startDate.toISOString() });
});
if (process.env.NODE_ENV === 'production') {
app.use(express.static(path.join(__dirname, '../build')));
app.get('*', (_req, res) => {
res.sendFile(path.join(__dirname, '../build', 'index.html'));
});
}
app.listen(SERVER_PORT, () => console.log(`Server running on :${SERVER_PORT}`));
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