46 lines
2.0 KiB
JavaScript
46 lines
2.0 KiB
JavaScript
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// Web Push (background / closed-tab / mobile notifications). Fully optional:
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// - if the `web-push` package isn't installed, or VAPID env keys aren't set,
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// isEnabled() is false and every call is a silent no-op (the app is unaffected).
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// Configure in production by setting:
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// VAPID_PUBLIC_KEY, VAPID_PRIVATE_KEY, VAPID_SUBJECT (e.g. mailto:admin@bizgaze.com)
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// Generate a key pair once with: npx web-push generate-vapid-keys
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const R = require('./repos');
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let webpush = null;
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try { webpush = require('web-push'); } catch (_) { /* package not installed -> push disabled */ }
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const PUBLIC = process.env.VAPID_PUBLIC_KEY || '';
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const PRIVATE = process.env.VAPID_PRIVATE_KEY || '';
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const SUBJECT = process.env.VAPID_SUBJECT || 'mailto:support@bizgaze.com';
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let ready = false;
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if (webpush && PUBLIC && PRIVATE) {
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try { webpush.setVapidDetails(SUBJECT, PUBLIC, PRIVATE); ready = true; }
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catch (e) { console.warn('[push] invalid VAPID config:', e.message); }
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}
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if (!ready) console.log('[push] Web Push disabled (set web-push + VAPID_PUBLIC_KEY/VAPID_PRIVATE_KEY to enable).');
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function isEnabled() { return ready; }
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function publicKey() { return ready ? PUBLIC : ''; }
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// Fire-and-forget push to every device the user has subscribed. Dead subscriptions
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// (410 Gone / 404) are pruned. Never throws.
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async function sendToUser(userId, payload) {
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if (!ready) return;
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let subs = [];
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try { subs = R.pushSubs.byUser(userId); } catch (_) { return; }
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const data = JSON.stringify(payload || {});
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for (const s of subs) {
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const sub = { endpoint: s.endpoint, keys: { p256dh: s.p256dh, auth: s.auth } };
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try {
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await webpush.sendNotification(sub, data, { TTL: 600 });
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} catch (err) {
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const code = err && err.statusCode;
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if (code === 404 || code === 410) { try { R.pushSubs.removeByEndpoint(s.endpoint); } catch (_) {} }
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// other errors (network, 4xx) are ignored — push is best-effort
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}
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}
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}
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module.exports = { isEnabled, publicKey, sendToUser };
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