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File & Image Upload System

Status: ✅ Complete (Core Features)
Last Updated: 2026-01-14

Overview​

Complete file and image upload system with storage adapter pattern, image processing, and comprehensive security.

Implementation Details​

Core Infrastructure​

  • ✅ Database schema (File model with userId, fileName, fileType, mimeType, size, storageKey, storageAdapter, isImage, metadata; ImageVariant model for resized versions)
  • ✅ Storage adapter interface (IFileStorageAdapter) following email service pattern
  • ✅ DiskStorageAdapter implementation (stores files in server/uploads/{userId}/{fileId}/)
  • ✅ FileService (upload, download, delete, list, user ownership verification)
  • ✅ ImageProcessingService (resize images to thumbnail, small, medium, large, original - max 4 sizes + original)
  • ✅ FileUploadService (orchestrator coordinating FileService + ImageProcessingService)

API & Security​

  • ✅ API routes (POST /api/files/upload, GET /api/files/:id, GET /api/files/:id/download, GET /api/files/:id/url, DELETE /api/files/:id, GET /api/files)
  • ✅ Security (user isolation, file type validation, size limits, path sanitization)
  • ✅ Backend tests (comprehensive coverage - 40+ tests passing, core functionality fully tested)

Frontend Components​

  • ✅ Frontend FileUpload component (drag-and-drop, preview, progress)
  • ✅ Frontend ImageDisplay component (displays appropriate variant based on context)

Integrations​

  • ✅ Update Person.pictureUrl to use File.id instead of URL string (schema, backend service, frontend updated)
  • ✅ Update Book.coverUrl to use File.id (schema, backend service, frontend updated)
  • ✅ Update Recipe.imageUrl to use File.id (schema, backend service, frontend updated)

API Endpoints​

  • /api/files/upload - Upload file
  • /api/files/:id - Get file metadata
  • /api/files/:id/download - Download file
  • /api/files/:id/url - Get file URL (for images, returns appropriate variant URL)
  • /api/files/:id - Delete file
  • /api/files - List user's files