> For the complete documentation index, see [llms.txt](https://docs.beeoclock.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.beeoclock.com/services/order-management.md). # Order Management ## Overview This directory contains comprehensive documentation for the Order Management module of the Bee O'clock panel service. The order management system handles the complete lifecycle of customer orders, including services and products, with advanced scheduling, payment tracking, and multi-tenant support within the SaaS platform. ## Documentation Structure ### [API Documentation](/services/order-management/api.md) Complete REST API reference including all endpoints, request/response schemas, authentication requirements, and usage examples for order management operations. **Key Topics Covered:** * Order CRUD operations with validation * Paginated order listing with advanced filtering * Order service and product management * Status management and workflow transitions * Comprehensive data schemas and validation * Error handling and business rule enforcement * Performance optimization and monitoring ### [Interface Documentation](/services/order-management/interface.md) Detailed documentation of TypeScript interfaces, DTOs, enums, and contracts used throughout the order management module. **Key Topics Covered:** * Data Transfer Objects (DTOs) with validation * Domain interfaces and entity definitions * Enum definitions and business constants * Type definitions and utility types * Validation constraints and business rules * Event interfaces for system integration * Repository contracts and specifications ### [Use Case Documentation](/services/order-management/usecase.md) Business logic and use case implementations following Clean Architecture principles and CQRS pattern with comprehensive saga workflows. **Key Topics Covered:** * Core business use cases with permission validation * Saga pattern implementation with rollback capabilities * Error handling strategies and compensation logic * Event publishing and system integration * Performance considerations and optimization * Integration patterns with external services ### [Database Schema Documentation](/services/order-management/db_schema.md) MongoDB schema definitions, relationships, indexes, and data integrity rules for the order management module. **Key Topics Covered:** * Entity schemas and sub-document structures * Index strategies and query optimization * Multi-tenancy support and data isolation * Data validation and business constraints * Audit trail and state history tracking * Performance optimization and monitoring ## Module Architecture ### Technology Stack * **Framework**: NestJS with TypeScript * **Database**: MongoDB with Mongoose ODM * **Architecture**: Clean Architecture + CQRS + DDD * **Patterns**: Repository Pattern, Saga Pattern, Event-Driven Architecture * **Caching**: Redis for performance optimization * **Queue System**: AMQP for async processing * **Monitoring**: Comprehensive logging and metrics ### Core Features #### Order Lifecycle Management * Comprehensive order creation with validation and conflict detection * Multi-step update workflows with change tracking and audit trails * Status management with predefined transition rules and business validation * Soft deletion with dependency checking and data preservation #### Service Management * Individual service scheduling within orders * Specialist assignment and availability validation * Appointment conflict prevention and resolution * Service-specific status tracking and workflow management #### Product Management * Product inclusion in orders with quantity management * Service-associated products with relationship tracking * Inventory integration and stock validation * Product-specific payment status tracking #### Advanced Scheduling * Real-time specialist availability checking * Appointment conflict detection and prevention * Multi-timezone support with proper date handling * Flexible appointment rescheduling with validation #### Payment Integration * Order-level and item-level payment status tracking * Payment workflow integration with external services * Payment constraint validation for order modifications * Comprehensive payment audit trails #### Multi-Tenant Architecture * Complete tenant data isolation with security * Tenant-specific business rule configuration * Scalable database partitioning strategies * Performance optimization per tenant size ## Business Rules ### Order Creation 1. **Comprehensive Validation**: All services and products must be valid and available 2. **Conflict Prevention**: Specialist availability validation prevents double booking 3. **Customer Management**: Automatic customer creation and validation workflows 4. **Business Rule Enforcement**: Compliance with tenant-specific configuration 5. **Payment Requirements**: Payment policy validation and enforcement ### Order Updates 1. **Change Validation**: Strict validation of what can be changed and when 2. **Status Transitions**: Predefined valid status transition workflows 3. **Time Constraints**: Cannot modify past appointments or completed orders 4. **Payment Constraints**: Cannot modify orders with completed payments 5. **Permission Validation**: User must have appropriate permissions for scope of changes ### Order Deletion 1. **Soft Deletion**: Orders are marked as deleted rather than physically removed 2. **Dependency Checking**: Cannot delete orders with active dependencies or references 3. **Payment Protection**: Cannot delete orders with active or completed payments 4. **Data Preservation**: Historical data maintained for compliance and audit requirements 5. **Cleanup Coordination**: Automatic cleanup of related resources and notifications ### Service Management 1. **Specialist Assignment**: At least one specialist must be assigned to each service 2. **Availability Validation**: Specialists must be available during requested times 3. **Conflict Prevention**: Cannot create overlapping appointments for same specialist 4. **Status Dependencies**: Service status changes must follow valid transition rules 5. **Customer Communication**: Automatic notifications for status changes ### Permission Management 1. **Role-Based Access**: Different permission levels for different user roles 2. **Scope-Based Filtering**: OWN scope restricts access to user's assigned orders 3. **Tenant Isolation**: Complete data isolation between different tenants 4. **Audit Logging**: All access attempts and changes are logged for security 5. **Permission Inheritance**: Service permissions inherit from order permissions ## API Integration Examples ### Creating a Complex Order ```typescript POST /api/v1/order Authorization: Bearer x-business-tenant-id: Content-Type: application/json { "services": [ { "serviceSnapshot": { "_id": "64fa1c71b19d6d001c88a921", "languageVersions": [ { "language": "en", "title": "Premium Massage Therapy", "description": "90-minute therapeutic massage with aromatherapy" } ], "durationVersions": [ { "durationInSeconds": 5400, "breakInSeconds": 300, "prices": [ { "price": 120.00, "currency": "USD", "preferredLanguages": ["en"] } ] } ] }, "orderAppointmentDetails": { "start": "2024-07-26T14:00:00.000Z", "end": "2024-07-26T15:30:00.000Z", "type": "service", "languageCodes": ["en"], "specialists": [ { "_id": "64fa1c71b19d6d001c88a922", "member": { "_id": "64fa1c71b19d6d001c88a923" } } ], "attendants": [ { "customer": { "firstName": "Jane", "lastName": "Smith", "email": "jane.smith@example.com", "phone": "+1-555-123-4567" }, "firstTime": true } ], "location": { "address": "123 Wellness Street, Health City, HC 12345", "coordinates": { "latitude": 40.7128, "longitude": -74.0060 }, "roomNumber": "Room 201", "buildingInfo": "Wellness Center - Second Floor" } }, "customerNote": "Client prefers lavender oil for aromatherapy. Has mild allergy to eucalyptus.", "status": "requested" } ], "products": [ { "productSnapshot": { "_id": "64fa1c71b19d6d001c88a926", "title": "Premium Aromatherapy Oil Set", "description": "Organic essential oils for therapeutic massage", "price": 35.00, "currency": "USD", "category": "aromatherapy" }, "quantity": 1 }, { "productSnapshot": { "_id": "64fa1c71b19d6d001c88a927", "title": "Relaxation Gift Card", "description": "$50 gift card for future services", "price": 50.00, "currency": "USD", "category": "gift-cards" }, "quantity": 1 } ], "businessNote": "VIP customer - provide extra attention and premium amenities", "notificationSettings": { "emailNotifications": true, "smsNotifications": true, "pushNotifications": true, "reminderSettings": { "enabled": true, "timeBeforeInMinutes": 120 } } } ``` ### Advanced Order Filtering ```typescript GET /api/v1/order/paged?page=1&size=20&statuses[]=confirmed&statuses[]=inProgress&start=2024-07-01T00:00:00.000Z&end=2024-07-31T23:59:59.999Z&memberIds[]=64fa1c71b19d6d001c88a922&memberIds[]=64fa1c71b19d6d001c88a924 Authorization: Bearer x-business-tenant-id: ``` ### Updating Order Status with Workflow ```typescript PUT /api/v1/order/64fa1c71b19d6d001c88a91f Authorization: Bearer x-business-tenant-id: Content-Type: application/json { "_id": "64fa1c71b19d6d001c88a91f", "status": "confirmed", "services": [ { "_id": "64fa1c71b19d6d001c88a920", "status": "accepted", "customerNote": "Updated: Client confirmed aromatherapy preferences" } ], "businessNote": "Updated: Customer confirmed appointment and special requests", "notificationSettings": { "emailNotifications": true, "smsNotifications": true, "pushNotifications": true, "reminderSettings": { "enabled": true, "timeBeforeInMinutes": 60 } } } ``` ## Development Guidelines ### Testing Strategy * **Unit Tests**: Business logic validation and domain rule enforcement * **Integration Tests**: Database operations and external service integration * **E2E Tests**: Complete order workflow validation from creation to completion * **Performance Tests**: Load testing and scalability validation under high concurrency * **Security Tests**: Permission validation and data isolation verification ### Error Handling * Domain-specific exceptions with clear error codes and messages * Consistent error response format across all endpoints with detailed context * Proper HTTP status codes for different error categories and business scenarios * Comprehensive logging for debugging and monitoring with correlation IDs * Graceful degradation for non-critical failures with fallback mechanisms ### Performance Considerations * Comprehensive database indexing strategy for optimal query performance * Multi-level caching with intelligent invalidation and cache warming * Optimized queries with proper data loading and projection strategies * Asynchronous processing for non-critical operations and notifications * Connection pooling and resource management for high concurrency ### Security Best Practices * Input validation and sanitization at all API and business logic levels * Role-based access control with granular permissions and scope enforcement * Audit logging for all sensitive operations with complete traceability * Rate limiting and abuse prevention with intelligent throttling * Data encryption for sensitive information in transit and at rest ## Related Modules ### Dependencies * **Permission Module**: Role and permission management with scope-based access control * **Customer Module**: Customer creation, validation, and profile management * **Service Module**: Service configuration, availability, and scheduling validation * **Member Module**: Specialist assignment, availability checking, and workload management * **Product Module**: Product catalog, inventory management, and pricing validation * **Business Client Module**: Tenant management, configuration, and business rules * **Payment Module**: Payment processing, status tracking, and financial workflows ### Integration Points * **Cache Module**: Performance optimization with intelligent cache management * **Event Bus**: Async processing and cross-module communication * **Notification Module**: Order-related notifications and customer communication * **Analytics Module**: Business intelligence and performance metrics * **Audit Module**: Compliance tracking and change history management * **Workflow Module**: Business process automation and approval workflows ## Performance Metrics ### Key Performance Indicators * Order creation/update response times and throughput metrics * Search and filtering query performance with optimization tracking * Database query performance analysis and slow query identification * Cache hit rates and effectiveness measurement across different data types * Error rate monitoring and categorization for business and technical issues ### Monitoring and Alerting * Real-time API endpoint response time monitoring with SLA tracking * Database performance and query analysis with automated optimization suggestions * Cache performance and hit rate tracking with capacity planning * Business workflow success rates and completion metrics * Comprehensive error rate monitoring with intelligent alerting and escalation ## Scalability Considerations ### Horizontal Scaling * Stateless service design for easy horizontal scaling across multiple instances * Database sharding strategies for large datasets with tenant-based partitioning * Distributed caching for multi-instance deployment with consistency guarantees * Load balancing for API endpoints with intelligent request routing * Microservice-ready architecture with clear service boundaries ### Vertical Scaling * Database optimization and indexing with continuous performance monitoring * Query performance tuning with automated query plan analysis * Memory usage optimization with efficient data structures and caching * CPU-intensive operation optimization with async processing and batching * Storage efficiency improvements with data compression and archival strategies ## Future Enhancements ### Planned Features * **AI-Powered Scheduling**: Intelligent appointment suggestions based on historical data and preferences * **Dynamic Pricing**: Time and demand-based pricing models with real-time adjustment * **Advanced Analytics**: Comprehensive business intelligence with predictive analytics * **Mobile Optimization**: Enhanced mobile API support with offline capabilities * **Integration Marketplace**: Third-party service integrations with standardized APIs ### Technical Improvements * **Event Sourcing**: Complete audit trail with event replay capabilities for compliance * **GraphQL API**: Enhanced query capabilities and client-specific data fetching * **Microservice Architecture**: Split into focused microservices with clear boundaries * **Real-time Updates**: WebSocket integration for live order status updates * **Advanced Search**: Elasticsearch integration for complex search and analytics ## Troubleshooting Guide ### Common Issues * **Order Creation Failures**: Validation errors, specialist conflicts, and resolution strategies * **Permission Denied Errors**: Access control troubleshooting and permission verification * **Performance Issues**: Query optimization, caching improvements, and resource scaling * **Data Consistency**: Multi-tenant isolation problems and data integrity validation * **Integration Failures**: External service communication and fallback mechanisms ### Debugging Tools * Structured error messages with correlation IDs for request tracing * Comprehensive logging with request context and business operation tracking * Database query analysis tools with performance profiling * Cache inspection utilities with hit rate and eviction monitoring * Performance profiling tools with bottleneck identification ### Support Resources * Comprehensive API documentation with interactive examples and use cases * Error code reference guide with resolution strategies and best practices * Performance optimization guide with specific recommendations and benchmarks * Best practices documentation with coding standards and architectural guidelines * Community forums and support channels with expert assistance ## Contributing Guidelines ### Code Standards * TypeScript strict mode compliance with comprehensive type safety * ESLint and Prettier configuration with automated formatting and linting * Comprehensive test coverage requirements with minimum thresholds * Clean Architecture principles adherence with clear layer separation * Domain-Driven Design patterns with rich domain models ### Documentation Requirements * Update documentation with all code changes and new features * Include comprehensive API examples with real-world use cases * Maintain schema documentation accuracy with automated validation * Document business rule changes with impact analysis * Provide migration guides for breaking changes with step-by-step instructions ### Review Process * Mandatory code review for all changes with multiple reviewer approval * Testing validation and coverage verification with automated quality gates * Documentation update validation with completeness checking * Performance impact assessment with benchmarking requirements * Security review for sensitive changes with threat modeling ## Migration and Deployment ### Database Migrations * Schema evolution and backwards compatibility with version management * Data migration scripts and validation with rollback procedures * Index management and optimization with performance impact assessment * Performance impact assessment with before/after benchmarking * Rollback procedures and safety measures with automated recovery ### Deployment Strategies * Blue-green deployment for zero downtime with automated health checks * Feature flags for gradual rollouts with real-time monitoring * Database migration coordination with application deployment * Cache warming strategies with performance optimization * Comprehensive health check validation with automated rollback triggers ### Monitoring and Rollback * Real-time deployment monitoring with comprehensive metrics and alerting * Automated rollback triggers with intelligent failure detection * Data integrity validation with comprehensive consistency checking * Performance regression detection with automated benchmarking * User impact assessment with real-time feedback and metrics