refactor: isolate database logic and models

README.md

@@ -109,6 +109,26 @@ server/                   # Backend code
 ├── __tests__/                     # Backend tests
 │   ├── database.test.js
 │   └── server.test.js
+├── database/              # Database layer
+│   ├── connection/                # Mongoose connection for database
+│   │   ├── __tests__/
+│   │   │   └── mongoose.test.ts
+│   │   └── mongoose.ts
+│   ├── models/                    # Mongoose models for database
+│   │   ├── __tests__/
+│   │   ├── seed.model.ts
+│   │   ├── survey.model.ts
+│   │   └── user.model.ts
+│   ├── controllers/               # Data access layer (i.e. CRUD operations)
+│   │   ├── __tests__/
+│   │   ├── seed.controller.ts
+│   │   ├── survey.controller.ts
+│   │   └── user.controller.ts
+│   ├── types/                     # Database type definitions
+│   │   ├── seed.type.ts
+│   │   ├── survey.type.ts
+│   │   └── user.type.ts 
+│   └── index.ts                   # Database module exports
 ├── models/               # Mongoose schemas
 │   └── __tests__/                 # Models tests
 │       ├── Survey.test.js
@@ -127,8 +147,7 @@ server/                   # Backend code
 │   ├── __tests__/                 # Utils tests
 │   │   └── generateReferralCode.test.js
 │   └── generateReferralCode.js           # Utility to generate unique referral codes
-├── database.js                           # Mongoose DB connection init
-├── index.js                              # Main entry point for Express backend
+├── index.ts                              # Main entry point for Express backend
 ├── .gitignore                            # Specifies files to ignore in Git
 ├── package.json                          # Backend dependencies and scripts
 └── package-lock.json                     # Lockfile for backend dependencies

server/src/__tests__/database.test.ts → server/src/database/connection/__tests__/mongoose.test.ts

@@ -1,6 +1,6 @@
 import { describe, expect, it, jest, beforeEach, afterEach } from '@jest/globals';
 import mongoose from 'mongoose';
-import connectDB from '../database';
+import { connectDB } from '../../index';
 
 // Mock mongoose
 jest.mock('mongoose');

server/src/database/controllers/seed.controller.ts

@@ -0,0 +1 @@
+// TODO: Implement Seed repository

server/src/database/controllers/survey.controller.ts

@@ -0,0 +1 @@
+// TODO: Implement Survey repository

server/src/database/controllers/user.controller.ts

@@ -0,0 +1 @@
+// TODO: Implement User repository

server/src/database/index.ts

@@ -0,0 +1,12 @@
+// Connection setup
+export { default as connectDB } from './connection/mongoose';
+
+// Type exports
+// export * from './types/user.type';
+// export * from './types/survey.type';
+// export * from './types/seed.type';
+
+// Repository exports
+// export * from './repositories/user.repository';
+// export * from './repositories/survey.repository';
+// export * from './repositories/seed.repository';

server/src/database/models/seed.model.ts

@@ -0,0 +1 @@
+// TODO: Implement Seed mongoose model

server/src/database/models/survey.model.ts

@@ -0,0 +1 @@
+// TODO: Implement Survey mongoose model

server/src/database/models/user.model.ts

@@ -0,0 +1 @@
+// TODO: Implement User mongoose model

server/src/database/types/seed.type.ts

@@ -0,0 +1 @@
+// TODO: Implement Seed type interface + Zod validation

server/src/database/types/survey.type.ts

@@ -0,0 +1 @@
+// TODO: Implement Survey type interface + Zod validation

server/src/database/types/user.type.ts

@@ -0,0 +1 @@
+// TODO: Implement User type interface + Zod validation

server/src/index.ts

@@ -7,7 +7,7 @@
 import helmet from 'helmet';
 import nocache from 'nocache';
 
-import connectDB from '@/database';
+import { connectDB } from '@/database/index';
 import authRoutes from '@/routes/auth';
 import pageRoutes from '@/routes/pages';
 import surveyRoutes from '@/routes/surveys';
@@ -208,12 +208,12 @@
 	res.status(500).json({ message: 'Something went wrong!' });
 });
 
 (async () => {
 	try {
 		console.log('Starting DB connection...');
 		await connectDB();
 		console.log('DB connected successfully');
 		const PORT = parseInt(process.env.PORT || '1234', 10);
 		app.listen(PORT, '0.0.0.0', () => {
 			console.log(
 				`Server running with security headers at http://localhost:${PORT}`