From 4f14f630a2ecfe2dc51ef446b8f4ad877e6b5a29 Mon Sep 17 00:00:00 2001
From: rahul-rajak-nsut <rahulrajak.cs@gmail.com>
Date: Sun, 12 Apr 2026 19:38:54 +0530
Subject: [PATCH] feat: add daily cron job to mark expired invoices as overdue

---
 backend/package-lock.json       | 14 +++++++++++--
 backend/package.json            |  1 +
 backend/src/cron/invoiceCron.js | 36 +++++++++++++++++++++++++++++++++
 backend/src/server.js           |  3 +++
 4 files changed, 52 insertions(+), 2 deletions(-)
 create mode 100644 backend/src/cron/invoiceCron.js

diff --git a/backend/package-lock.json b/backend/package-lock.json
index 3635c8039f..4c8e1f5540 100644
--- a/backend/package-lock.json
+++ b/backend/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "idurar-erp-crm",
-  "version": "4.0.0",
+  "version": "4.1.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "idurar-erp-crm",
-      "version": "4.0.0",
+      "version": "4.1.0",
       "license": "Fair-code License",
       "dependencies": {
         "@aws-sdk/client-s3": "^3.509.0",
@@ -30,6 +30,7 @@
         "mongoose-autopopulate": "^1.1.0",
         "multer": "^1.4.4",
         "node-cache": "^5.1.2",
+        "node-cron": "^4.2.1",
         "openai": "^4.27.0",
         "pug": "^3.0.2",
         "resend": "^2.0.0",
@@ -3953,6 +3954,15 @@
         "node": ">= 8.0.0"
       }
     },
+    "node_modules/node-cron": {
+      "version": "4.2.1",
+      "resolved": "https://registry.npmjs.org/node-cron/-/node-cron-4.2.1.tgz",
+      "integrity": "sha512-lgimEHPE/QDgFlywTd8yTR61ptugX3Qer29efeyWw2rv259HtGBNn1vZVmp8lB9uo9wC0t/AT4iGqXxia+CJFg==",
+      "license": "ISC",
+      "engines": {
+        "node": ">=6.0.0"
+      }
+    },
     "node_modules/node-domexception": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/node-domexception/-/node-domexception-1.0.0.tgz",
diff --git a/backend/package.json b/backend/package.json
index ee2b151ea8..3a61a63382 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -35,6 +35,7 @@
     "mongoose-autopopulate": "^1.1.0",
     "multer": "^1.4.4",
     "node-cache": "^5.1.2",
+    "node-cron": "^4.2.1",
     "openai": "^4.27.0",
     "pug": "^3.0.2",
     "resend": "^2.0.0",
diff --git a/backend/src/cron/invoiceCron.js b/backend/src/cron/invoiceCron.js
new file mode 100644
index 0000000000..16d6265b7c
--- /dev/null
+++ b/backend/src/cron/invoiceCron.js
@@ -0,0 +1,36 @@
+const cron = require('node-cron');
+const Invoice = require('../models/appModels/Invoice');
+
+// 📚 Cron format: 'minute hour day month weekday'
+// '0 0 * * *' means → at 00:00 (midnight) every day
+cron.schedule('0 0 * * *', async () => {
+  console.log('⏰ Running daily invoice expiry check...');
+
+  const today = new Date();
+
+  try {
+    // 📚 updateMany = update ALL documents that match the filter
+    const expiredInvoices = await Invoice.updateMany(
+      {
+        // 📚 $lt = "less than" → find invoices where expiredDate < today
+        expiredDate: { $lt: today },
+        isOverdue: false, // only update ones not already marked
+        removed: false,   // skip deleted invoices
+      },
+      {
+        // 📚 $set = update these fields
+        $set: {
+          isOverdue: true,
+          status: 'overdue',
+        },
+      }
+    );
+
+    console.log(`✅ ${expiredInvoices.modifiedCount} invoices marked as overdue`);
+
+  } catch (error) {
+    console.error('❌ Cron job failed:', error.message);
+  }
+});
+
+console.log('✅ Invoice expiry cron job scheduled — runs daily at midnight!');
\ No newline at end of file
diff --git a/backend/src/server.js b/backend/src/server.js
index e7b62ba1ea..14acaeb272 100644
--- a/backend/src/server.js
+++ b/backend/src/server.js
@@ -31,6 +31,9 @@ for (const filePath of modelsFiles) {
   require(path.resolve(filePath));
 }
 
+// Start cron jobs
+require('./src/cron/invoiceCron');
+
 // Start our app!
 const app = require('./app');
 app.set('port', process.env.PORT || 8888);