feat: add admin analytics

Author: rohitbytecode

src/app.js

@@ -10,6 +10,7 @@ import paymentRoutes from './routes/payment.routes.js';
 import signupRoutes from './routes/signup.js';
 import adminRoutes from './routes/adminroutes.js';
 
+import dashboardRoutes from './routes/dashboard.routes.js';
 import doctorRoutes from './routes/doctor.routes.js';
 import receptionRoutes from './routes/reception.routes.js';
 import billingRoutes from './routes/billing.routes.js';
@@ -55,6 +56,7 @@ app.use('/api/payment', paymentRoutes);
 app.use('/api/signup', signupRoutes);
 app.use('/api/admin', adminRoutes);
 
+app.use('/api/admin/dashboard', dashboardRoutes);
 app.use('/api/users/doctors', doctorRoutes);
 app.use('/api/users/receptionist', receptionRoutes);
 app.use('/api/billing', billingRoutes);

src/controllers/dashboard.controller.js

@@ -0,0 +1,61 @@
+import User from '../models/User.js';
+import Patient from '../models/patient.js';
+import Appointment from '../models/appointment.js';
+import Billing from '../models/billing.js';
+
+export const getAdminDashboardSummary = async (req, res, next) => {
+  try {
+    const totalDoctors = await User.countDocuments({ role: "doctor" });
+    const totalPatients = await Patient.countDocuments();
+    const totalAppointments = await Appointment.countDocuments();
+
+    const revenueAgg = await Billing.aggregate([
+      { $match: { status: "paid" } },
+      {
+        $group: {
+          _id: null,
+          total: { $sum: "$amount" }
+        }
+      }
+    ]);
+
+    const totalRevenue = revenueAgg.length ? revenueAgg[0].total : 0;
+
+    const pendingAgg = await Billing.aggregate([
+      { $match: { status: "pending" } },
+      {
+        $group: {
+          _id: null,
+          total: { $sum: "$amount" }
+        }
+      }
+    ]);
+
+    const pendingRevenue = pendingAgg.length ? pendingAgg[0].total : 0;
+
+    const todayStart = new Date();
+    todayStart.setHours(0, 0, 0, 0);
+
+    const todayEnd = new Date();
+    todayEnd.setHours(23, 59, 59, 999);
+
+    const todayAppointments = await Appointment.countDocuments({
+      createdAt: { $gte: todayStart, $lte: todayEnd }
+    });
+
+    res.status(200).json({
+      success: true,
+      data: {
+        totalDoctors,
+        totalPatients,
+        totalAppointments,
+        totalRevenue,
+        pendingRevenue,
+        todayAppointments
+      }
+    });
+
+  } catch (error) {
+    next(error);
+  }
+};

src/routes/dashboard.routes.js

@@ -0,0 +1,14 @@
+import express from "express";
+import { protect, authorize } from "../middleware/authmiddleware.js";
+import { getAdminDashboardSummary } from '../controllers/dashboard.controller.js';
+
+const router = express.Router();
+
+router.get(
+  "/summary",
+  protect,
+  authorize(["admin"]),
+  getAdminDashboardSummary
+);
+
+export default router;