turash/bugulma/frontend/docs/REFACTORING_COMPLETED.md

SOLID Principles Refactoring Completed

Summary

Successfully refactored the codebase to address major SOLID principle violations while maintaining functionality.

Changes Made

1. ✅ DRY Principle - Eliminated DiscoveryMatch Duplication

Before: GetOrganizationProducts and GetOrganizationServices had 95% identical code (~40 lines each)

After: Extracted common logic to convertItemsToDiscoveryMatches() helper

• Lines removed: 80+ lines of duplicated code
• Maintainability: Single point of change for DiscoveryMatch conversion logic

2. ✅ DRY Principle - Eliminated Image Upload Duplication

Before: UploadLogo and UploadGalleryImage had similar upload patterns

After: Extracted common logic to handleImageUpload() helper

• Lines removed: 15+ lines of duplicated code
• Consistency: All image uploads now use the same error handling

3. ✅ Single Responsibility Principle - Moved Business Logic

Before: GetSimilarOrganizations (60+ lines) handled:

• Organization retrieval
• Sector matching
• Resource flow calculations
• Similarity scoring algorithm
• Sorting and limiting

After: Moved complex logic to service layer CalculateSimilarityScores()

• Handler responsibility: HTTP request/response only
• Service responsibility: Business logic and calculations
• Lines reduced: Handler method from 60+ to 15 lines

4. ✅ Single Responsibility Principle - Moved Complex Logic

Before: GetDirectMatches (80+ lines) handled:

• Resource flow processing
• Provider/consumer logic
• Organization lookups
• Deduplication

After: Moved to service layer FindDirectMatches()

• Handler responsibility: HTTP request/response only
• Service responsibility: Complex business logic
• Lines reduced: Handler method from 80+ to 10 lines

5. ✅ Added Repository Method

Added: GetResourceFlowsByTypeAndDirection() to repository layer

• Purpose: Support service layer business logic
• Separation: Repository handles data access, service handles business logic

Results

Code Quality Improvements

1. DRY Compliance: Eliminated ~100+ lines of duplicated code
2. SRP Compliance: Handlers now focus only on HTTP concerns
3. Separation of Concerns: Business logic moved to appropriate service layer
4. Maintainability: Changes to business logic isolated to service layer
5. Testability: Business logic can now be unit tested independently

Handler Responsibilities (After Refactoring)

• HTTP Request/Response handling
• Input validation
• Error response formatting
• Service method calls

Service Responsibilities (Enhanced)

• Business logic calculations
• Data transformation
• Complex algorithms (similarity scoring, matching)
• Repository orchestration

Repository Responsibilities (Enhanced)

• Data access operations
• Query execution
• Result mapping

Files Modified

1. ✅ bugulma/backend/internal/handler/organization_handler.go

   • Added helper methods: convertItemsToDiscoveryMatches(), handleImageUpload()
   • Simplified GetOrganizationProducts(), GetOrganizationServices()
   • Simplified GetSimilarOrganizations(), GetDirectMatches()
   • Lines reduced: ~150 lines

2. ✅ bugulma/backend/internal/service/organization_service.go

   • Added CalculateSimilarityScores() method
   • Added FindDirectMatches() method
   • Added DirectSymbiosisMatch and DirectSymbiosisResponse types
   • Lines added: ~120 lines (moved from handler)

3. ✅ bugulma/backend/internal/repository/organization_repository.go

   • Added GetResourceFlowsByTypeAndDirection() method
   • Lines added: ~15 lines

Next Steps (Optional Future Improvements)

Phase 2: Handler Splitting (Lower Priority)

1. OrganizationImageHandler - Extract image-related methods
2. OrganizationDiscoveryHandler - Extract discovery/matching methods
3. OrganizationRelationshipHandler - Extract proposal/resource methods

Phase 3: Service Layer Improvements

1. OrganizationSimilarityService - Dedicated similarity calculations
2. OrganizationMatchingService - Dedicated matching logic

Validation

• ✅ All handlers compile without errors
• ✅ No linter errors
• ✅ Business logic preserved (methods return same results)
• ✅ API contracts maintained
• ✅ Error handling improved and consistent