297 lines
10 KiB
Markdown
297 lines
10 KiB
Markdown
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# Advanced Order Management Implementation Summary
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## Overview
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This document summarizes the complete implementation of advanced order management features for the Enaklo POS backend system. The implementation includes three major features: **Partial Refund**, **Void Order**, and **Split Bill** functionality.
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## 🎯 Implemented Features
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### 1. Partial Refund System
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**Purpose**: Allow refunding specific items from paid orders while keeping remaining items.
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**Key Components**:
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- ✅ **API Endpoint**: `POST /order/partial-refund`
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- ✅ **Service Method**: `PartialRefundRequest()`
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- ✅ **Repository Methods**: `UpdateOrderItem()`, `UpdateOrderTotals()`
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- ✅ **Validation**: Order status, item existence, quantity validation
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- ✅ **Transaction Tracking**: Creates refund transactions with negative amounts
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- ✅ **Status Management**: Updates order to "PARTIAL" or "REFUNDED"
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**Business Logic**:
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```go
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// Flow: PAID → PARTIAL/REFUNDED
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// - Validate order is PAID
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// - Reduce item quantities
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// - Recalculate totals
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// - Create refund transaction
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// - Update order status
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```
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### 2. Void Order System
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**Purpose**: Cancel ongoing orders (NEW/PENDING) either entirely or by specific items.
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**Key Components**:
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- ✅ **API Endpoint**: `POST /order/void`
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- ✅ **Service Method**: `VoidOrderRequest()`
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- ✅ **Two Modes**: "ALL" (entire order) or "ITEM" (specific items)
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- ✅ **Validation**: Order status, item existence, quantity validation
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- ✅ **Status Management**: Updates order to "VOIDED" or "PARTIAL"
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**Business Logic**:
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```go
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// Flow: NEW/PENDING → VOIDED/PARTIAL
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// - Validate order is NEW or PENDING
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// - ALL: Set status to VOIDED
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// - ITEM: Reduce quantities, recalculate totals
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// - Update order status accordingly
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```
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### 3. Split Bill System
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**Purpose**: Split orders into a separate order by items or amounts.
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**Key Components**:
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- ✅ **API Endpoint**: `POST /order/split-bill`
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- ✅ **Service Method**: `SplitBillRequest()`
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- ✅ **Two Modes**: "ITEM" (specify items) or "AMOUNT" (specify amount)
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- ✅ **Order Creation**: Creates a new order for the split
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- ✅ **Original Order**: Voids the original order after splitting
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**Business Logic**:
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```go
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// Flow: NEW/PENDING → PENDING (reduced) + PAID (split)
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// - Validate order is NEW or PENDING
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// - ITEM: Create PAID order with specified items, reduce quantities in original
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// - AMOUNT: Create PAID order with specified amount, reduce amount in original
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// - Original order remains PENDING with reduced items/amount
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// - New split order becomes PAID with specified payment method
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```
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## 🏗️ Architecture Components
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### 1. Constants & Status Management
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```go
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// Added new order statuses
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const (
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New OrderStatus = "NEW"
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Paid OrderStatus = "PAID"
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Cancel OrderStatus = "CANCEL"
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Pending OrderStatus = "PENDING"
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Refunded OrderStatus = "REFUNDED"
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Voided OrderStatus = "VOIDED" // New
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Partial OrderStatus = "PARTIAL" // New
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)
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```
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### 2. Entity Models
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```go
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// New entity types for request/response handling
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type PartialRefundItem struct {
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OrderItemID int64 `json:"order_item_id" validate:"required"`
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Quantity int `json:"quantity" validate:"required,min=1"`
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}
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type VoidItem struct {
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OrderItemID int64 `json:"order_item_id" validate:"required"`
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Quantity int `json:"quantity" validate:"required,min=1"`
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}
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type SplitBillSplit struct {
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CustomerName string `json:"customer_name" validate:"required"`
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CustomerID *int64 `json:"customer_id"`
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Items []SplitBillItem `json:"items,omitempty"`
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Amount float64 `json:"amount,omitempty"`
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}
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```
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### 3. Repository Layer
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```go
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// New repository methods
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type Repository interface {
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// ... existing methods
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UpdateOrderItem(ctx mycontext.Context, orderItemID int64, quantity int) error
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UpdateOrderTotals(ctx mycontext.Context, orderID int64, amount, tax, total float64) error
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}
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```
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### 4. Service Layer
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```go
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// New service methods
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type Service interface {
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// ... existing methods
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PartialRefundRequest(ctx mycontext.Context, partnerID, orderID int64, reason string, items []entity.PartialRefundItem) error
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VoidOrderRequest(ctx mycontext.Context, partnerID, orderID int64, reason string, voidType string, items []entity.VoidItem) error
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SplitBillRequest(ctx mycontext.Context, partnerID, orderID int64, splitType string, splits []entity.SplitBillSplit) ([]*entity.Order, error)
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}
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```
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### 5. HTTP Handlers
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```go
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// New API endpoints
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func (h *Handler) Route(group *gin.RouterGroup, jwt gin.HandlerFunc) {
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// ... existing routes
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route.POST("/partial-refund", jwt, h.PartialRefund)
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route.POST("/void", jwt, h.VoidOrder)
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route.POST("/split-bill", jwt, h.SplitBill)
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}
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```
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## 📊 Order Status Flow
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```
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NEW → PENDING → PAID → REFUNDED
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↓ ↓ ↓
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VOIDED VOIDED PARTIAL
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```
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**Status Transitions**:
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- **NEW/PENDING** → **VOIDED**: When entire order is voided
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- **NEW/PENDING** → **PARTIAL**: When some items are voided
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- **PAID** → **PARTIAL**: When some items are refunded
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- **PAID** → **REFUNDED**: When all items are refunded
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## 🔒 Validation & Security
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### Input Validation
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- ✅ **Order Existence**: Verify order exists and belongs to partner
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- ✅ **Status Validation**: Ensure appropriate status for operations
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- ✅ **Item Validation**: Verify items exist and quantities are valid
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- ✅ **Quantity Validation**: Prevent refunding/voiding more than available
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- ✅ **Split Validation**: Ensure split amounts match order total
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### Business Rules
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- ✅ **Partial Refund**: Only PAID orders can be partially refunded
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- ✅ **Void Order**: Only NEW/PENDING orders can be voided
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- ✅ **Split Bill**: Only NEW/PENDING orders can be split
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- ✅ **Transaction Tracking**: All operations create audit trails
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## 🧪 Testing
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### Test Coverage
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- ✅ **Unit Tests**: Comprehensive test coverage for all service methods
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- ✅ **Mock Testing**: Uses testify/mock for dependency mocking
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- ✅ **Edge Cases**: Tests for invalid states and error conditions
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- ✅ **Success Scenarios**: Tests for successful operations
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### Test Files
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- `internal/services/v2/order/refund_test.go` - Original refund tests
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- `internal/services/v2/order/advanced_order_management_test.go` - New feature tests
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## 📚 Documentation
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### API Documentation
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- ✅ **REFUND_API.md**: Complete refund API documentation
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- ✅ **ADVANCED_ORDER_MANAGEMENT.md**: Comprehensive feature documentation
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- ✅ **IMPLEMENTATION_SUMMARY.md**: This summary document
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### Documentation Features
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- ✅ **Request/Response Examples**: Complete JSON examples
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- ✅ **Error Handling**: Common error scenarios and responses
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- ✅ **Business Logic**: Detailed process flows
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- ✅ **cURL Examples**: Ready-to-use API testing commands
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## 🚀 Usage Examples
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### Partial Refund
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```bash
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curl -X POST /order/partial-refund \
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-H "Authorization: Bearer TOKEN" \
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-d '{
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"order_id": 123,
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"reason": "Customer returned damaged items",
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"items": [
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{"order_item_id": 456, "quantity": 2}
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]
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}'
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```
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### Void Order
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```bash
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curl -X POST /order/void \
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-H "Authorization: Bearer TOKEN" \
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-d '{
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"order_id": 123,
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"reason": "Customer cancelled order",
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"type": "ALL"
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}'
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```
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### Split Bill
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```bash
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curl -X POST /order/split-bill \
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-H "Authorization: Bearer TOKEN" \
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-d '{
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"order_id": 123,
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"type": "ITEM",
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"payment_method": "CASH",
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"payment_provider": "CASH",
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"items": [
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{"order_item_id": 456, "quantity": 1},
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{"order_item_id": 789, "quantity": 1}
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]
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}'
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```
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## 🔧 Database Considerations
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### Schema Updates
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```sql
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-- New statuses supported
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ALTER TABLE orders ADD CONSTRAINT check_status
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CHECK (status IN ('NEW', 'PENDING', 'PAID', 'REFUNDED', 'VOIDED', 'PARTIAL'));
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-- Support for quantity updates
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ALTER TABLE order_items ADD COLUMN updated_at TIMESTAMP DEFAULT NOW();
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```
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### Transaction Management
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- ✅ **Atomic Operations**: All operations use database transactions
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- ✅ **Rollback Support**: Failed operations are properly rolled back
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- ✅ **Data Consistency**: Ensures order totals match item totals
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## 🎯 Benefits
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### Business Benefits
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1. **Flexibility**: Support for complex order management scenarios
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2. **Customer Satisfaction**: Handle partial returns and cancellations
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3. **Operational Efficiency**: Streamlined bill splitting for groups
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4. **Audit Trail**: Complete tracking of all order modifications
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### Technical Benefits
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1. **Scalable Architecture**: Clean separation of concerns
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2. **Comprehensive Testing**: High test coverage ensures reliability
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3. **Extensible Design**: Easy to add new order management features
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4. **Documentation**: Complete API documentation for integration
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## 🔮 Future Enhancements
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### Potential Improvements
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1. **Bulk Operations**: Support for bulk partial refunds/voids
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2. **Approval Workflow**: Multi-level approval for large operations
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3. **Notification System**: Customer notifications for refunds/voids
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4. **Analytics Dashboard**: Order management trends and analysis
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5. **Inventory Integration**: Automatic inventory updates for refunds/voids
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### Integration Opportunities
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1. **Payment Gateway**: Direct refund processing
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2. **Customer Management**: Customer point adjustments
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3. **Reporting System**: Enhanced order analytics
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4. **Mobile App**: Real-time order management
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## 📋 Implementation Checklist
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- ✅ **Core Features**: All three main features implemented
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- ✅ **API Endpoints**: Complete REST API implementation
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- ✅ **Service Layer**: Business logic implementation
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- ✅ **Repository Layer**: Database operations
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- ✅ **Validation**: Comprehensive input validation
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- ✅ **Error Handling**: Proper error responses
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- ✅ **Testing**: Unit test coverage
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- ✅ **Documentation**: Complete API documentation
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- ✅ **Status Management**: New order statuses
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- ✅ **Transaction Tracking**: Audit trail implementation
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## 🎉 Conclusion
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The Advanced Order Management system provides a comprehensive solution for complex order scenarios in the Enaklo POS system. The implementation follows best practices for scalability, maintainability, and reliability, with complete documentation and testing coverage.
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The system is now ready for production use and provides the foundation for future enhancements and integrations.
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