turash/bugulma/frontend/docs/SOLID_VIOLATIONS_ANALYSIS.md

SOLID Principles Violations Analysis

Major Violations Found

1. ❌ Single Responsibility Principle (SRP) - OrganizationHandler

Violation: OrganizationHandler has 5+ responsibilities:

• Organization CRUD operations
• Image upload/management
• Resource flow matching
• Product/Service discovery
• Proposal management
• User organization relationships

Impact: 945+ lines in a single file, hard to maintain, test, and understand.

Solution: Split into separate handlers:

• OrganizationHandler - Core CRUD operations
• OrganizationImageHandler - Image uploads/deletions
• OrganizationMatchingHandler - Discovery and matching logic
• OrganizationRelationshipHandler - Proposals, resources, similar orgs

2. ❌ DRY Principle - Discovery Match Conversion

Violation: GetOrganizationProducts and GetOrganizationServices have 95% identical code:

• Same error handling pattern
• Same DiscoveryMatch creation logic
• Same response structure
• Only difference: products vs services and "product" vs "service"

Lines duplicated: ~40 lines each

Solution: Extract common logic to convertItemsToDiscoveryMatches() helper

3. ❌ Single Responsibility Principle - Complex Methods

Violation: Methods doing too many things:

GetSimilarOrganizations (60+ lines):

• Gets organization by ID
• Gets organizations by sector
• Gets resource flows
• Calculates similarity scores (business logic!)
• Sorts results
• Returns response

GetDirectMatches (80+ lines):

• Gets resource flows
• Processes providers/consumers logic
• Calls service methods
• Deduplicates results
• Returns complex response

Solution: Extract business logic to service layer, keep handlers thin.

4. ❌ DRY Principle - Image Upload Pattern

Violation: UploadLogo and UploadGalleryImage have similar structure:

• Get file from form
• Save image via service
• Get organization
• Update organization
• Return response

Solution: Extract common image upload logic.

5. ❌ Single Responsibility Principle - Handler Dependencies

Violation: OrganizationHandler depends on 5 services:

• orgService
• imageService
• resourceFlowService
• matchingService
• proposalService

Impact: Constructor has 5 parameters, hard to test, violates dependency inversion.

Solution: Split handlers to have focused dependencies.

Proposed Refactoring Plan

Phase 1: Extract Helper Methods (Immediate)

1. Add convertItemsToDiscoveryMatches() helper
2. Add handleImageUpload() helper
3. Add calculateSimilarityScores() to service layer
4. Add findDirectMatches() to service layer

Phase 2: Split Handlers (Future)

1. OrganizationHandler - Basic CRUD (Create, GetByID, Update, Delete, GetAll, GetBy*, Search)
2. OrganizationImageHandler - Image operations (UploadLogo, UploadGalleryImage, DeleteGalleryImage)
3. OrganizationDiscoveryHandler - Discovery features (GetSimilarOrganizations, GetOrganizationProducts, GetOrganizationServices, GetDirectMatches)
4. OrganizationRelationshipHandler - Relationships (GetOrganizationProposals, GetOrganizationResources, GetUserOrganizations)

Phase 3: Service Layer Improvements

1. OrganizationSimilarityService - Handle similarity calculations
2. OrganizationMatchingService - Handle direct matches and discovery

Implementation Priority

High Priority (Immediate):

• Extract convertItemsToDiscoveryMatches() helper
• Move GetSimilarOrganizations business logic to service
• Move GetDirectMatches business logic to service

Medium Priority (This Week):

• Extract handleImageUpload() helper
• Split image-related methods to separate handler

Low Priority (Next Sprint):

• Full handler split
• Service layer refactoring