# PostgreSQL to MongoDB Migration Progress

## Migration Status: 🟡 IN PROGRESS

This document tracks the progress of migrating the Gym Khana Management System from PostgreSQL to MongoDB.

---

## ✅ COMPLETED

### 1. Infrastructure Setup
- ✅ Installed Mongoose (MongoDB ODM)
- ✅ Created MongoDB connection configuration
- ✅ Updated server.js to use MongoDB
- ✅ Updated environment variables (.env.example)
- ✅ Removed PostgreSQL dependency from package.json

### 2. MongoDB Models Created
All 20 models have been created with proper schemas, indexes, and relationships:

- ✅ **Role.js** - User roles (admin, front_desk, etc.)
- ✅ **User.js** - System users/staff
- ✅ **MembershipType.js** - Membership packages
- ✅ **Member.js** - Club members and family members
- ✅ **MemberAccount.js** - Member account balances
- ✅ **MemberDocument.js** - Member document uploads
- ✅ **Transaction.js** - Financial transactions
- ✅ **MenuItem.js** - Restaurant menu items
- ✅ **RestaurantTable.js** - Restaurant tables
- ✅ **RestaurantOrder.js** - Restaurant orders
- ✅ **OrderItem.js** - Order line items
- ✅ **SportsFacility.js** - Sports facilities
- ✅ **SportsUsage.js** - Sports usage tracking
- ✅ **SportsMonthlyCharge.js** - Monthly sports charges
- ✅ **WarehouseItem.js** - Inventory items
- ✅ **Supplier.js** - Suppliers
- ✅ **PurchaseOrder.js** - Purchase orders
- ✅ **PurchaseOrderItem.js** - PO line items
- ✅ **StockTransaction.js** - Stock movements
- ✅ **AuditLog.js** - System audit trail

### 3. Controllers Migrated

#### Authentication Module ✅ COMPLETE
- ✅ **authController.js** - Login, member login, change password, get current user

### 4. Middleware Updated
- ✅ **middleware/auth.js** - Authentication and authorization middleware
- ✅ **middleware/errorHandler.js** - MongoDB error handling

### 5. Database Seeding
- ✅ **scripts/seed.js** - Comprehensive seed script with:
  - All 7 roles
  - 6 membership types
  - Super admin user (username: `admin`, password: `Admin@123`)
  - Primary member (ID: `1000`, name: Ahmed Khan, password: `Member@123`)
  - Dependent member - Wife (ID: `1000-w`, name: Sara Khan, password: `Member@123`)
  - Member accounts with balances
  - Sample menu items (11 items)
  - Restaurant tables (8 tables)
  - Sports facilities (5 facilities)
  - Warehouse items (9 items)
  - Suppliers (3 suppliers)

---

## 🟡 IN PROGRESS

### Controllers to Migrate
The following controllers still use PostgreSQL and need to be migrated to MongoDB:

1. **User Management** (`userController.js`)
   - Create user
   - Get all users
   - Get user by ID
   - Update user
   - Delete/deactivate user
   - Reset password
   - Get roles

2. **Member Management** (`memberController.js`)
   - Register member
   - Add family member
   - Get all members
   - Search members
   - Get member by ID
   - Update member profile
   - Update member status
   - Get family members
   - Remove family member

3. **Restaurant Module**
   - **menu.controller.js** - Menu CRUD operations
   - **table.controller.js** - Table management
   - **order.controller.js** - Order creation (INCOMPLETE - needs full CRUD)
   - **payment.controller.js** - Payment processing (INCOMPLETE)
   - **report.controller.js** - Sales reports (INCOMPLETE)

4. **Warehouse Module**
   - **warehouse.controller.js** - Warehouse item management
   - **stock.controller.js** - Stock transactions
   - **supplier.controller.js** - Supplier management (includes PO management)

---

## ⚠️ INCOMPLETE APIS TO COMPLETE

### Restaurant Module
The restaurant module has several incomplete APIs that need to be implemented:

1. **Order Management** (`order.controller.js`)
   - ✅ Create order
   - ❌ Get order by ID
   - ❌ Update order
   - ❌ Add order item
   - ❌ Remove order item
   - ❌ Checkout/finalize order
   - ❌ Generate bill/receipt

2. **Payment Processing** (`payment.controller.js`)
   - ❌ Process payment
   - ❌ Create transaction record
   - ❌ Update member account balance
   - ❌ Check credit eligibility
   - ❌ Support bank transfer method

3. **Reports** (`report.controller.js`)
   - Partial: Daily sales report (skeleton only)
   - ❌ Monthly revenue report
   - ❌ Outstanding members report
   - ❌ Defaulters list
   - ❌ Tax summary
   - ❌ Payment collection report

### Sports Module
Currently completely missing - needs full implementation:
- ❌ Sports facility booking
- ❌ Usage tracking
- ❌ Monthly charge calculation
- ❌ All routes commented out

### Member Portal
All member self-service APIs are commented out:
- ❌ View profile
- ❌ View transactions
- ❌ View orders
- ❌ View outstanding balance

---

## 🔧 RESPONSE FORMAT STANDARDIZATION

### Current Status
Some controllers use inconsistent response formats:

**✅ Correct Format (Already Using)**:
```json
{
  "success": true,
  "message": "Operation successful",
  "timestamp": "2026-01-19T...",
  "data": { ... },
  "meta": { ... }
}
```

**Controllers Already Standardized**:
- ✅ authController.js
- ✅ Stock controller (warehouse)
- ✅ Warehouse controller
- ✅ Supplier controller

**❌ Need Standardization**:
- Menu controller - Missing timestamp
- Table controller - Missing timestamp
- Order controller - Partial
- Payment controller - Missing timestamp
- Report controller - Missing timestamp

---

## 📋 MIGRATION PLAN

### Phase 1: Core Controllers (Next Steps)
1. Migrate User Controller
2. Migrate Member Controller
3. Test authentication and user management flow

### Phase 2: Restaurant Module
1. Migrate Menu Controller + standardize responses
2. Migrate Table Controller + standardize responses
3. Complete Order Controller (full CRUD)
4. Complete Payment Controller (with transaction integration)
5. Complete Report Controller

### Phase 3: Warehouse Module
1. Migrate Warehouse Controller
2. Migrate Stock Controller
3. Migrate Supplier Controller (with PO management)

### Phase 4: Complete Missing Modules
1. Implement Sports Module
2. Implement Member Portal APIs
3. Implement Reports & Analytics

### Phase 5: Testing & Validation
1. Test all endpoints
2. Verify data integrity
3. Test member account balance updates
4. Test credit limit eligibility checks
5. Performance testing

---

## 🚀 HOW TO RUN

### 1. Install Dependencies
```bash
npm install
```

### 2. Configure Environment
Create a `.env` file:
```env
MONGODB_URI=mongodb://localhost:27017/gym_khana_db
PORT=3000
NODE_ENV=development
JWT_SECRET=your_jwt_secret_here
```

### 3. Seed Database
```bash
npm run seed
```

### 4. Start Server
```bash
npm run dev
```

### 5. Test Login
**Super Admin:**
- POST `/api/v1/auth/login`
- Body: `{ "username": "admin", "password": "Admin@123" }`

**Primary Member:**
- POST `/api/v1/auth/member/login`
- Body: `{ "memberId": "1000", "password": "Member@123" }`

---

## 📝 NOTES

### Key Differences from PostgreSQL

1. **IDs**: MongoDB uses `_id` (ObjectId) instead of auto-increment integers
2. **Relationships**: Using `ref` and `populate()` instead of JOIN queries
3. **Transactions**: Use Mongoose sessions for multi-document transactions
4. **Timestamps**: Automatic with `{ timestamps: true }` schema option
5. **Enums**: Defined directly in schema as arrays
6. **Triggers**: Implemented as pre/post hooks in models

### Member ID System
- Primary members: Numeric (e.g., "1000")
- Wife/Spouse: Primary ID + "-w" (e.g., "1000-w")
- Sons: Primary ID + "-s1", "-s2" (e.g., "1000-s1")
- Daughters: Primary ID + "-d1", "-d2" (e.g., "1000-d1")

### Auto-Generated Fields
Models with auto-generation:
- Transaction: `receiptNumber` (RCP-YYYYMMDD-XXXXXX)
- RestaurantOrder: `orderNumber` (ORD-YYYYMMDD-XXXXXX)
- PurchaseOrder: `poNumber` (PO-YYYYMMDD-XXX)

---

## ⏭️ NEXT IMMEDIATE STEPS

1. ✅ Complete seed script
2. ✅ Update package.json scripts
3. ⏳ Migrate User Controller
4. ⏳ Migrate Member Controller
5. ⏳ Test core authentication & user management flows
6. ⏳ Migrate Restaurant controllers
7. ⏳ Complete incomplete Restaurant APIs
8. ⏳ Migrate Warehouse controllers

---

## 📊 PROGRESS TRACKER

- **Models**: 20/20 (100%)
- **Controllers Migrated**: 1/8 (12.5%)
- **Middleware Updated**: 2/2 (100%)
- **Seed Script**: 1/1 (100%)
- **Overall Progress**: ~25%

**Last Updated**: 2026-01-19

---