169 lines
8.3 KiB
JavaScript
169 lines
8.3 KiB
JavaScript
const express = require('express');
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const webpush = require('web-push');
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const db = require('../db');
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const { authenticate } = require('../middleware/auth');
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const router = express.Router();
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// ── VAPID-Setup (einmalig, in DB gespeichert) ─────────────────────────────────
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function getVapidKeys() {
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const pub = db.prepare("SELECT value FROM admin_settings WHERE key='vapid_public'").get();
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const priv = db.prepare("SELECT value FROM admin_settings WHERE key='vapid_private'").get();
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if (pub && priv) return { publicKey: pub.value, privateKey: priv.value };
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const keys = webpush.generateVAPIDKeys();
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db.prepare("INSERT OR REPLACE INTO admin_settings (key,value) VALUES ('vapid_public',?)").run(keys.publicKey);
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db.prepare("INSERT OR REPLACE INTO admin_settings (key,value) VALUES ('vapid_private',?)").run(keys.privateKey);
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return keys;
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}
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const vapid = getVapidKeys();
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webpush.setVapidDetails('mailto:admin@dickendock.local', vapid.publicKey, vapid.privateKey);
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// GET /vapid-key – öffentlicher VAPID-Schlüssel für den Browser
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router.get('/vapid-key', authenticate, (req, res) => {
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res.json({ publicKey: vapid.publicKey });
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});
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// ── Öffentliche Schlüssel ─────────────────────────────────────────────────────
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// POST /keys – eigenen öffentlichen Schlüssel speichern
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router.post('/keys', authenticate, (req, res) => {
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const { publicKey } = req.body;
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if (!publicKey) return res.status(400).json({ error: 'Kein Schlüssel' });
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db.prepare('INSERT OR REPLACE INTO user_keys (user_id,public_key,updated_at) VALUES (?,?,CURRENT_TIMESTAMP)').run(req.user.id, publicKey);
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res.json({ success: true });
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});
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// GET /keys/:username – öffentlichen Schlüssel eines Users abrufen
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router.get('/keys/:username', authenticate, (req, res) => {
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const user = db.prepare('SELECT id FROM users WHERE username=?').get(req.params.username);
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if (!user) return res.status(404).json({ error: 'User nicht gefunden' });
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const key = db.prepare('SELECT public_key FROM user_keys WHERE user_id=?').get(user.id);
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if (!key) return res.status(404).json({ error: 'Noch kein Schlüssel hinterlegt' });
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res.json({ publicKey: key.public_key });
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});
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// ── Push-Subscriptions ────────────────────────────────────────────────────────
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router.post('/subscribe', authenticate, (req, res) => {
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const { endpoint, keys } = req.body;
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if (!endpoint || !keys?.p256dh || !keys?.auth) return res.status(400).json({ error: 'Ungültige Subscription' });
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db.prepare('INSERT OR REPLACE INTO push_subscriptions (user_id,endpoint,p256dh,auth) VALUES (?,?,?,?)')
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.run(req.user.id, endpoint, keys.p256dh, keys.auth);
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res.json({ success: true });
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});
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router.delete('/subscribe', authenticate, (req, res) => {
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db.prepare('DELETE FROM push_subscriptions WHERE user_id=?').run(req.user.id);
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res.json({ success: true });
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});
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// ── Nachrichten ───────────────────────────────────────────────────────────────
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// GET /conversations – alle Gesprächspartner mit ungelesener Anzahl
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router.get('/conversations', authenticate, (req, res) => {
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const uid = req.user.id;
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const convs = db.prepare(`
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SELECT
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CASE WHEN m.sender_id=? THEN m.recipient_id ELSE m.sender_id END AS partner_id,
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u.username AS partner_name,
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MAX(m.created_at) AS last_at,
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COUNT(CASE WHEN m.recipient_id=? AND m.deleted_by_recipient=0 THEN 1 END) AS unread
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FROM messages m
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JOIN users u ON u.id=(CASE WHEN m.sender_id=? THEN m.recipient_id ELSE m.sender_id END)
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WHERE (m.sender_id=? AND m.deleted_by_sender=0)
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OR (m.recipient_id=? AND m.deleted_by_recipient=0)
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GROUP BY partner_id
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ORDER BY last_at DESC
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`).all(uid, uid, uid, uid, uid);
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res.json(convs);
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});
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// GET /unread-count – Gesamtanzahl ungelesener Nachrichten
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router.get('/unread-count', authenticate, (req, res) => {
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const count = db.prepare('SELECT COUNT(*) c FROM messages WHERE recipient_id=? AND deleted_by_recipient=0').get(req.user.id).c;
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res.json({ count });
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});
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// GET /with/:username – Nachrichten mit einem User
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router.get('/with/:username', authenticate, (req, res) => {
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const uid = req.user.id;
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const partner = db.prepare('SELECT id FROM users WHERE username=?').get(req.params.username);
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if (!partner) return res.status(404).json({ error: 'User nicht gefunden' });
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const msgs = db.prepare(`
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SELECT m.id, m.sender_id, m.encrypted_content, m.iv, m.created_at,
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s.username AS sender_name
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FROM messages m
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JOIN users s ON s.id=m.sender_id
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WHERE ((m.sender_id=? AND m.recipient_id=? AND m.deleted_by_sender=0)
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OR (m.sender_id=? AND m.recipient_id=? AND m.deleted_by_recipient=0))
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ORDER BY m.created_at ASC
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`).all(uid, partner.id, partner.id, uid);
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res.json(msgs);
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});
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// GET /users – alle User außer sich selbst (für neues Gespräch)
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router.get('/users', authenticate, (req, res) => {
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const users = db.prepare('SELECT id,username FROM users WHERE id!=? ORDER BY username').all(req.user.id);
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res.json(users);
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});
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// POST /send – verschlüsselte Nachricht senden
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router.post('/send', authenticate, async (req, res) => {
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const { recipient_username, encrypted_content, iv } = req.body;
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if (!recipient_username || !encrypted_content || !iv)
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return res.status(400).json({ error: 'Fehlende Felder' });
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const recipient = db.prepare('SELECT id FROM users WHERE username=?').get(recipient_username);
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if (!recipient) return res.status(404).json({ error: 'Empfänger nicht gefunden' });
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const r = db.prepare('INSERT INTO messages (sender_id,recipient_id,encrypted_content,iv) VALUES (?,?,?,?)')
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.run(req.user.id, recipient.id, encrypted_content, iv);
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// Push-Benachrichtigung an Empfänger
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const subs = db.prepare('SELECT * FROM push_subscriptions WHERE user_id=?').all(recipient.id);
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const sender = db.prepare('SELECT username FROM users WHERE id=?').get(req.user.id);
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for (const sub of subs) {
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try {
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await webpush.sendNotification(
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{ endpoint: sub.endpoint, keys: { p256dh: sub.p256dh, auth: sub.auth } },
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JSON.stringify({ title: `Nachricht von ${sender.username}`, body: '🔒 Verschlüsselte Nachricht', icon: '/favicon.svg' })
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);
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} catch(e) {
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if (e.statusCode === 410) db.prepare('DELETE FROM push_subscriptions WHERE endpoint=?').run(sub.endpoint);
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}
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}
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res.json({ id: r.lastInsertRowid, success: true });
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});
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// DELETE /:id – Nachricht für sich löschen
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router.delete('/:id', authenticate, (req, res) => {
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const uid = req.user.id;
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const msg = db.prepare('SELECT * FROM messages WHERE id=?').get(req.params.id);
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if (!msg) return res.status(404).json({ error: 'Nicht gefunden' });
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if (msg.sender_id !== uid && msg.recipient_id !== uid)
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return res.status(403).json({ error: 'Kein Zugriff' });
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if (msg.sender_id === uid) db.prepare('UPDATE messages SET deleted_by_sender=1 WHERE id=?').run(msg.id);
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else db.prepare('UPDATE messages SET deleted_by_recipient=1 WHERE id=?').run(msg.id);
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// Wenn beide gelöscht → komplett entfernen
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const updated = db.prepare('SELECT * FROM messages WHERE id=?').get(msg.id);
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if (updated?.deleted_by_sender && updated?.deleted_by_recipient)
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db.prepare('DELETE FROM messages WHERE id=?').run(msg.id);
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res.json({ success: true });
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});
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// DELETE /conversation/:username – ganzes Gespräch für sich löschen
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router.delete('/conversation/:username', authenticate, (req, res) => {
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const uid = req.user.id;
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const partner = db.prepare('SELECT id FROM users WHERE username=?').get(req.params.username);
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if (!partner) return res.status(404).json({ error: 'User nicht gefunden' });
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db.prepare('UPDATE messages SET deleted_by_sender=1 WHERE sender_id=? AND recipient_id=?').run(uid, partner.id);
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db.prepare('UPDATE messages SET deleted_by_recipient=1 WHERE recipient_id=? AND sender_id=?').run(uid, partner.id);
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// Komplett löschen wenn beide weg
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db.prepare('DELETE FROM messages WHERE sender_id IN (?,?) AND recipient_id IN (?,?) AND deleted_by_sender=1 AND deleted_by_recipient=1')
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.run(uid, partner.id, uid, partner.id);
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res.json({ success: true });
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});
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module.exports = router;
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