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
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
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
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
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
Comprehensive Validation: All services and products must be valid and available
Conflict Prevention: Specialist availability validation prevents double booking
Customer Management: Automatic customer creation and validation workflows
Business Rule Enforcement: Compliance with tenant-specific configuration
Payment Requirements: Payment policy validation and enforcement
Order Updates
Change Validation: Strict validation of what can be changed and when
Status Transitions: Predefined valid status transition workflows
Time Constraints: Cannot modify past appointments or completed orders
Payment Constraints: Cannot modify orders with completed payments
Permission Validation: User must have appropriate permissions for scope of changes
Order Deletion
Soft Deletion: Orders are marked as deleted rather than physically removed
Dependency Checking: Cannot delete orders with active dependencies or references
Payment Protection: Cannot delete orders with active or completed payments
Data Preservation: Historical data maintained for compliance and audit requirements
Cleanup Coordination: Automatic cleanup of related resources and notifications
Service Management
Specialist Assignment: At least one specialist must be assigned to each service
Availability Validation: Specialists must be available during requested times
Conflict Prevention: Cannot create overlapping appointments for same specialist
Status Dependencies: Service status changes must follow valid transition rules
Customer Communication: Automatic notifications for status changes
Permission Management
Role-Based Access: Different permission levels for different user roles
Scope-Based Filtering: OWN scope restricts access to user's assigned orders
Tenant Isolation: Complete data isolation between different tenants
Audit Logging: All access attempts and changes are logged for security
Permission Inheritance: Service permissions inherit from order permissions
API Integration Examples
Creating a Complex Order
Advanced Order Filtering
Updating Order Status with Workflow
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
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