dbis_core-lite/docs/changelog/archive/MODULARIZATION_PROGRESS.md

Modularization Progress Report

Completed Tasks ✅

Phase 1: Foundation (COMPLETED)

1. ✅ Core Interfaces Created

   • /src/core/interfaces/repositories/ - All repository interfaces
   • /src/core/interfaces/services/ - All service interfaces
   • Clean exports via index.ts files

2. ✅ Repository Implementations

   • PaymentRepository - Full CRUD for payments
   • MessageRepository - ISO message data access
   • OperatorRepository - Operator management
   • SettlementRepository - Settlement tracking

3. ✅ Services Converted to Instance-Based with DI

   • MessageService - Now uses repositories, accepts dependencies via constructor
   • TransportService - Now accepts IMessageService via constructor
   • LedgerService - Now uses PaymentRepository, accepts adapter via constructor
   • ScreeningService - New instance-based service (replaces ScreeningEngine)

4. ✅ Simple DI Container

   • ServiceContainer class for service registration and resolution
   • Factory pattern support

In Progress 🔄

Phase 2: Core Orchestration

• PaymentWorkflow - Needs to be refactored to accept all services via constructor
• DI Container Setup - Need to wire all services together
• Route Updates - Update route handlers to use DI container

Remaining Tasks 📋

Critical

1. Refactor PaymentWorkflow

   • Accept all services via constructor (ILedgerService, IMessageService, ITransportService, IScreeningService)
   • Replace direct database queries with repository calls
   • Update all static method calls

2. Update Route Handlers

   • Wire services via DI container
   • Update PaymentWorkflow instantiation
   • Update all static service calls

3. Create Service Initialization

   • Setup function to initialize all repositories
   • Setup function to initialize all services
   • Wire dependencies correctly

Important

4. Add Index Files

   • Create index.ts files for all modules for clean exports
   • Update imports to use path aliases consistently

5. Testing

   • Update existing tests to use new structure
   • Create mock repositories for testing

Migration Notes

• Old static ScreeningEngine is preserved for backward compatibility
• New ScreeningService provides instance-based implementation
• All services now implement their respective interfaces
• Repository pattern separates data access from business logic

Breaking Changes

⚠️ Services are no longer static - All service methods must be called on instances ⚠️ Constructor injection required - Services must be instantiated with dependencies ⚠️ Repository pattern - Database queries are now in repositories, not services

Next Steps

1. Complete PaymentWorkflow refactoring
2. Create service initialization/bootstrap file
3. Update app.ts to use DI container
4. Update all route files
5. Test thoroughly
6. Update documentation