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105 lines
3.6 KiB
105 lines
3.6 KiB
const crypto = require('node:crypto');
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const http = require('node:http');
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const { Readable } = require('node:stream');
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try {
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process.loadEnvFile();
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} catch {
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// No .env file: env vars come from the host.
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}
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const { PORT = 3000, API_KEY, RESEND_API_KEY, MAIL_FROM, MAIL_TO } = process.env;
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const missing = ['API_KEY', 'RESEND_API_KEY', 'MAIL_FROM', 'MAIL_TO'].filter((name) => !process.env[name]);
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if (missing.length) {
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console.error(`Missing required env vars: ${missing.join(', ')}`);
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process.exit(1);
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}
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const recipients = MAIL_TO.split(',').map((address) => address.trim()).filter(Boolean);
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const hash = (value) => crypto.createHash('sha256').update(value).digest();
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function isAuthorized(header = '') {
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const [scheme, token] = header.split(' ');
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return scheme === 'Bearer' && Boolean(token) && crypto.timingSafeEqual(hash(token), hash(API_KEY));
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}
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async function sendEmail(text, recordedAt) {
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const response = await fetch('https://api.resend.com/emails', {
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method: 'POST',
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headers: { Authorization: `Bearer ${RESEND_API_KEY}`, 'Content-Type': 'application/json' },
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body: JSON.stringify({
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from: MAIL_FROM,
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to: recipients,
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subject: 'New Pebble voice memo',
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text: `${text}\n\nRecorded ${recordedAt.toLocaleString()}`,
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}),
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signal: AbortSignal.timeout(10_000),
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});
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if (!response.ok) throw new Error(`Resend ${response.status}: ${await response.text()}`);
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}
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function respond(res, status, body) {
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res.writeHead(status, { 'Content-Type': 'application/json' }).end(JSON.stringify(body));
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}
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// Pebble sends multipart/form-data with fields: transcription, recordedAt (ms epoch), client, audio (optional).
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async function handleWebhook(req, res) {
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if (!isAuthorized(req.headers.authorization)) {
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console.warn(' Rejected: missing or invalid Authorization header');
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return respond(res, 401, { error: 'Unauthorized' });
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}
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let form;
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try {
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form = await new Response(Readable.toWeb(req), {
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headers: { 'Content-Type': req.headers['content-type'] ?? '' },
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}).formData();
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} catch {
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console.warn(` Rejected: expected multipart/form-data, got ${req.headers['content-type'] ?? 'none'}`);
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return respond(res, 400, { error: 'Expected multipart/form-data' });
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}
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const transcription = form.get('transcription');
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const text = typeof transcription === 'string' ? transcription.trim() : '';
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const recordedAt = new Date(Number(form.get('recordedAt')) || Date.now());
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console.log(
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` Received: client=${form.get('client')} recordedAt=${recordedAt.toISOString()} ` +
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`chars=${text.length} audio=${form.has('audio')}`
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);
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if (!text) {
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console.warn(' Rejected: no transcription');
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return respond(res, 400, { error: 'No transcription' });
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}
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try {
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await sendEmail(text, recordedAt);
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} catch (err) {
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console.error(' Email failed:', err.message);
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return respond(res, 502, { error: 'Failed to send email' });
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}
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console.log(' Email sent');
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respond(res, 200, { ok: true });
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}
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http
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.createServer((req, res) => {
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const { pathname } = new URL(req.url, 'http://localhost');
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console.log(`[${new Date().toISOString()}] ${req.method} ${pathname}`);
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if (req.method === 'GET' && pathname === '/health') {
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return respond(res, 200, { ok: true });
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}
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if (req.method === 'POST' && pathname === '/transcription') {
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return handleWebhook(req, res).catch((err) => {
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console.error(err);
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respond(res, 500, { error: 'Internal server error' });
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});
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}
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respond(res, 404, { error: 'Not found' });
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})
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.listen(PORT, () => console.log(`Listening on port ${PORT}`));
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