From c88280d9f4bc391b43c8be4524f18e25e9ee58e2 Mon Sep 17 00:00:00 2001
From: arsam <me@asabbagh.com>
Date: Fri, 18 Sep 2026 23:19:32 +0330
Subject: [PATCH] Import source: app/backend/src/lib/push

Import the existing local project snapshot. This commit organizes existing files; it does not represent newly developed functionality.
---
 app/backend/src/lib/push.ts | 108 ++++++++++++++++++++++++++++++++++++
 1 file changed, 108 insertions(+)
 create mode 100644 app/backend/src/lib/push.ts

diff --git a/app/backend/src/lib/push.ts b/app/backend/src/lib/push.ts
new file mode 100644
index 0000000..909a701
--- /dev/null
+++ b/app/backend/src/lib/push.ts
@@ -0,0 +1,108 @@
+import webpush from 'web-push';
+import type { NotificationType } from '@prisma/client';
+import { prisma } from '../db.js';
+
+if (process.env.VAPID_PUBLIC_KEY && process.env.VAPID_PRIVATE_KEY) {
+  webpush.setVapidDetails(
+    process.env.VAPID_SUBJECT ?? 'mailto:admin@teknav.ir',
+    process.env.VAPID_PUBLIC_KEY,
+    process.env.VAPID_PRIVATE_KEY,
+  );
+}
+
+function buildPushPayload(type: NotificationType | string, payload: Record<string, unknown>) {
+  const icon = '/icons/icon-192x192.png';
+  const map: Record<string, { title: string; body: string; url: string }> = {
+    new_article: {
+      title: `مقاله جدید: ${payload.articleTitle ?? payload.title ?? ''}`,
+      body: String(payload.excerpt ?? ''),
+      url: `/article/${payload.articleSlug ?? payload.slug ?? ''}`,
+    },
+    comment: {
+      title: 'نظر جدید روی مقاله شما',
+      body: String(payload.content ?? '').slice(0, 80),
+      url: `/article/${payload.articleSlug ?? ''}`,
+    },
+    comment_reply: {
+      title: 'پاسخ به نظر شما',
+      body: String(payload.content ?? '').slice(0, 80),
+      url: `/article/${payload.articleSlug ?? ''}#comment-${payload.commentId ?? ''}`,
+    },
+    review_approved: {
+      title: 'مقاله شما تأیید شد',
+      body: String(payload.articleTitle ?? payload.title ?? ''),
+      url: '/writer',
+    },
+    review_revision: {
+      title: 'بازخورد ویراستار',
+      body: String(payload.note ?? ''),
+      url: '/writer',
+    },
+    review_rejected: {
+      title: 'مقاله رد شد',
+      body: String(payload.articleTitle ?? payload.title ?? ''),
+      url: '/writer',
+    },
+    review_submitted: {
+      title: 'مقاله جدید برای بررسی',
+      body: String(payload.articleTitle ?? payload.title ?? ''),
+      url: '/admin',
+    },
+    system: {
+      title: 'تکناو',
+      body: String(payload.message ?? ''),
+      url: '/',
+    },
+  };
+  const base = map[type] ?? { title: 'تکناو', body: '', url: '/' };
+  return { ...base, icon };
+}
+
+async function deliverPush(
+  subs: { endpoint: string; auth: string; p256dh: string }[],
+  data: string,
+) {
+  await Promise.allSettled(
+    subs.map((sub) =>
+      webpush
+        .sendNotification({ endpoint: sub.endpoint, keys: { auth: sub.auth, p256dh: sub.p256dh } }, data)
+        .catch(async (err: { statusCode?: number }) => {
+          if (err.statusCode === 410) {
+            await prisma.pushSubscription.delete({ where: { endpoint: sub.endpoint } }).catch(() => {});
+          }
+        }),
+    ),
+  );
+}
+
+export async function sendPushToUser(
+  userId: string,
+  type: NotificationType,
+  payload: Record<string, unknown>,
+) {
+  if (!process.env.VAPID_PUBLIC_KEY || !process.env.VAPID_PRIVATE_KEY) return;
+
+  // Check notification preference — if user has explicitly disabled push for this event, skip.
+  const pref = await prisma.notificationPreference.findUnique({
+    where: { userId_eventType_channel: { userId, eventType: type, channel: 'push' } },
+  }).catch(() => null);
+  if (pref && !pref.enabled) return;
+
+  const subs = await prisma.pushSubscription.findMany({ where: { userId } });
+  if (!subs.length) return;
+  const data = JSON.stringify(buildPushPayload(type, payload));
+  await deliverPush(subs, data);
+}
+
+export async function sendGuestPushByTopic(
+  topic: string,
+  payload: Record<string, unknown>,
+) {
+  if (!process.env.VAPID_PUBLIC_KEY || !process.env.VAPID_PRIVATE_KEY) return;
+  const subs = await prisma.pushSubscription.findMany({
+    where: { userId: null, topics: { has: topic } },
+  });
+  if (!subs.length) return;
+  const data = JSON.stringify(buildPushPayload('new_article', payload));
+  await deliverPush(subs, data);
+}