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services/BookingLifecycleCron.js

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+const cron = require('node-cron')
+const BookingModel = require('../models/BookingModel')
+const { notifyUser } = require('../utils/notifyUser')
+
+const PAYMENT_TIMEOUT_MINUTES = 60
+
+let ioInstance = null
+
+/** Called once from index.js right after the socket.io server is created — cron jobs have no `req`. */
+function setIo (io) {
+  ioInstance = io
+}
+
+/** Cancel unpaid bookings that missed the deposit-payment window, freeing their time slot back up. */
+const autoCancelUnpaidBookings = async () => {
+  const cutoff = new Date(Date.now() - PAYMENT_TIMEOUT_MINUTES * 60 * 1000)
+
+  try {
+    const bookings = await BookingModel.find({
+      status: 'pending_payment',
+      createdAt: { $lte: cutoff }
+    })
+
+    for (const booking of bookings) {
+      try {
+        booking.status = 'cancelled'
+        await booking.save()
+        await notifyUser(ioInstance, booking.buyer, {
+          project_post_id: booking._id,
+          type: 'booking',
+          title: 'لغو رزرو',
+          description: `رزرو خدمت «${booking.serviceTitle}» به دلیل عدم پرداخت بیعانه در بازه زمانی مجاز لغو شد.`
+        })
+      } catch (err) {
+        console.error(`[BookingLifecycleCron] failed to cancel booking ${booking._id}:`, err)
+      }
+    }
+
+    if (bookings.length) {
+      console.log(`[BookingLifecycleCron] auto-cancelled ${bookings.length} unpaid booking(s)`)
+    }
+  } catch (error) {
+    console.error('[BookingLifecycleCron] auto-cancel failed:', error)
+  }
+}
+
+// هر ۱۰ دقیقه: لغو رزروهای بدون پرداخت بیعانه خارج از مهلت ۶۰ دقیقه‌ای
+cron.schedule('*/10 * * * *', autoCancelUnpaidBookings)
+
+module.exports = {
+  autoCancelUnpaidBookings,
+  setIo
+}