Implement comprehensive deletion cascade logic, upload enhancements, and alias
management updates for Phase 2 Part 2 of the API refactoring.
**Upload Enhancements (Section 5):**
- POST /api/v1/images/upload now supports flowAlias parameter
- Eager flow creation: creates flow record immediately when flowAlias provided
- FlowId logic: undefined → generate UUID, null → keep null, UUID → use provided
- Automatically assigns flowAlias in flow.aliases JSONB upon upload
**Alias Management (Section 6):**
- Removed alias from PUT /api/v1/images/:id request body
- Only focalPoint and meta can be updated via PUT endpoint
- Use dedicated PUT /api/v1/images/:id/alias endpoint for alias assignment
**Deletion Strategy Overhaul (Section 7):**
- **ImageService.hardDelete()** with MinIO cleanup and cascades:
- Deletes physical file from MinIO storage
- Cascades: sets outputImageId=NULL in related generations
- Cascades: removes alias entries from flow.aliases
- Cascades: removes imageId from generation.referencedImages arrays
- MVP approach: proceeds with DB cleanup even if MinIO fails
- **GenerationService.delete()** with conditional logic:
- If output image WITHOUT alias → hard delete both image and generation
- If output image WITH alias → keep image, delete generation only, set generationId=NULL
- **FlowService.delete()** with cascade and alias protection:
- Deletes all generations (uses conditional delete logic)
- Deletes all images WITHOUT alias
- Keeps images WITH alias (sets flowId=NULL)
- Deletes flow record from database
**Type Updates:**
- UploadImageRequest: Added flowAlias parameter (string)
- UpdateImageRequest: Removed alias field (Section 6.1)
- GenerationResponse: Updated prompt fields to match reversed semantics
- prompt: string (what was actually used for generation)
- originalPrompt: string | null (user's original, only if enhanced)
- DeleteImageResponse: Changed to { id: string } (hard delete, no deletedAt)
**Error Constants (Section 11):**
- Removed: GENERATION_ALREADY_SUCCEEDED, MAX_RETRY_COUNT_EXCEEDED
- Added: SCOPE_INVALID_FORMAT, SCOPE_CREATION_DISABLED,
SCOPE_GENERATION_LIMIT_EXCEEDED, STORAGE_DELETE_FAILED
**Technical Notes:**
- Hard delete replaces soft delete throughout the system
- Cascade operations maintain referential integrity
- Alias protection ensures valuable images are preserved
- All Phase 2 Part 2 code compiles with zero new TypeScript errors
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**Parameter Renames (Section 1.1):**
- Rename `assignAlias` → `alias` in CreateGenerationRequest
- Rename `assignFlowAlias` → `flowAlias` (changed from Record<string, string> to string)
- Rename `flowAliases` → `flowAlias` in UploadImageRequest
- Update all route handlers and service methods to use new names
- Simplify flowAlias logic to assign single alias string to output image
**Reference Image Auto-Detection (Section 1.2):**
- Add `extractAliasesFromPrompt()` function with regex pattern: /(?:^|\s)(@[\w-]+)/g
- Make `referenceImages` parameter optional
- Auto-detect aliases from prompt text and merge with manual references
- Manual references have priority (listed first), then auto-detected
- Remove duplicates while preserving order
- Invalid aliases are silently skipped (validated with isValidAliasFormat)
**FlowId Response Logic (Section 10.1):**
- If `flowId: undefined` (not provided) → generate new UUID, return in response
- If `flowId: null` (explicitly null) → keep null, don't generate
- If `flowId: "uuid"` (specific value) → use provided value
- Eager flow creation when `flowAlias` is provided (create flow immediately in DB)
**Generation Modification Endpoint (Section 9):**
- Add `PUT /api/v1/generations/:id` endpoint
- Modifiable fields: prompt, aspectRatio, flowId, meta
- Non-generative params (flowId, meta) → update DB only
- Generative params (prompt, aspectRatio) → update DB + trigger regeneration
- FlowId management: null to detach, UUID to attach/change (with eager creation)
- Regeneration updates existing image (same ID, same MinIO path)
**Type Definitions:**
- Update CreateGenerationParams interface with new parameter names
- Add UpdateGenerationRequest interface
- Add extractAliasesFromPrompt export to validators index
**Documentation:**
- Update REST API examples with new parameter names
**Technical Notes:**
- All Phase 1 changes are backward compatible at the data layer
- TypeScript strict mode passes (no new errors introduced)
- Pre-existing TypeScript errors in middleware and other routes remain unchanged
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Co-Authored-By: Claude <noreply@anthropic.com>
CRITICAL FIXES:
- Add GET /api/v1/images/resolve/:alias endpoint with 3-tier alias resolution
- Supports optional flowId query parameter
- Returns image, scope (technical/flow/project), and flowId
- Placed before GET /:id to avoid route conflict
- Change live endpoint from /api/v1/live/generate to /api/v1/live
- Corrects path to match specification
PARAMETER NAMING:
- Rename outputAlias to assignAlias in requests and service
- Rename flowAliases to assignFlowAlias in requests and service
- Update generations route to use new parameter names
FLOW TIMESTAMP UPDATES:
- Add flow.updatedAt trigger in ImageService.create()
- Updates flow timestamp when image is uploaded to a flow
- Flow.updatedAt already updated in GenerationService.create()
AUDIT TRAIL VERIFICATION:
- Confirmed apiKeyId is properly saved in generations table
- Confirmed apiKeyId is properly saved in images table (both upload and generation)
TYPE FIXES:
- Add explicit | undefined to AliasResolutionResponse.flowId
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Implement the complete image generation lifecycle with ImageService, GenerationService,
and v1 API endpoints. This enables end-to-end generation with alias support and flow management.
**Core Services:**
- **ImageService**: Full CRUD for images table
- Create/read/update/delete operations
- Soft delete support with deletedAt
- Project and flow alias assignment
- Storage key and file hash tracking
- Pagination and filtering
- **GenerationService**: Complete generation lifecycle orchestration
- Create generation records with pending status
- Resolve reference images via AliasService
- Call ImageGenService for AI generation
- Create image records in database
- Link images to generations
- Update generation status (processing → success/failed)
- Support for flow association and alias assignment
- Retry failed generations
- Soft/hard delete operations
**v1 API Routes:**
- `POST /api/v1/generations` - Create with references & aliases
- `GET /api/v1/generations` - List with filters & pagination
- `GET /api/v1/generations/:id` - Get with full relations
- `POST /api/v1/generations/:id/retry` - Retry failed generation
- `DELETE /api/v1/generations/:id` - Delete generation & output
**Route Features:**
- Authentication via validateApiKey middleware
- Project key requirement
- Rate limiting per API key
- Request validation with pagination
- Error handling with proper status codes
- Response transformation with type converters
**Type Updates:**
- Add explicit undefined to optional properties for exactOptionalPropertyTypes
- CreateGenerationParams interface for service layer
- GenerationFilters with proper optionals
**Infrastructure:**
- Mount v1Router at /api/v1 in app.ts
- Keep legacy routes for backward compatibility
- Versioned API structure for future iterations
**Technical Notes:**
- Reference image download temporarily skipped (TODO: storage key parsing)
- File hash computation temporarily disabled (TODO: helper method)
- File size set to 0 (TODO: get from storage)
- All Phase 2 code is fully type-safe with zero TypeScript errors
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Oleg Proskurin