# Implementation Plan

- [x] 1. Create database migration script for existing file paths





  - Create script to convert absolute paths to relative paths in submissions table
  - Create script to convert absolute paths to relative paths in task_attachments table
  - Create script to convert absolute paths to relative paths in projects table (thumbnail_path)
  - Create script to convert absolute paths to relative paths in users table (avatar_url)
  - Add validation and error handling for problematic paths
  - _Requirements: 1.1, 1.2, 1.3, 1.4, 1.5, 1.6_

- [ ]* 1.1 Write property test for database migration completeness
  - **Property 12: Database migration completeness**
  - **Validates: Requirements 1.1, 1.2, 1.3, 1.4**

- [ ]* 1.2 Write property test for migration file preservation
  - **Property 11: Migration preserves file access**
  - **Validates: Requirements 1.5**

- [x] 2. Update FileHandler to use only relative path logic





  - Modify save_file method to store only relative paths in database
  - Update thumbnail creation to use only relative paths
  - Remove any absolute path handling logic
  - Add methods for converting absolute paths to relative paths
  - _Requirements: 2.1, 2.2, 2.3, 2.4, 2.5_

- [ ]* 2.1 Write property test for relative path storage
  - **Property 1: File storage uses relative paths**
  - **Validates: Requirements 2.1**

- [ ]* 2.2 Write property test for path resolution
  - **Property 2: Path resolution produces valid absolute paths**
  - **Validates: Requirements 2.2**

- [ ]* 2.3 Write property test for thumbnail path storage
  - **Property 3: All thumbnail paths are relative**
  - **Validates: Requirements 2.3**

- [x] 3. Update file serving endpoints to resolve relative paths





  - Modify files router to resolve relative paths to absolute paths
  - Update attachment serving endpoint to use relative path resolution
  - Update submission serving endpoint to use relative path resolution
  - Update project thumbnail serving endpoint to use relative path resolution
  - _Requirements: 2.2, 3.2, 3.3_

- [ ]* 3.1 Write property test for file serving
  - **Property 7: File serving resolves paths correctly**
  - **Validates: Requirements 3.3**

- [ ]* 3.2 Write property test for thumbnail URL accessibility
  - **Property 6: All thumbnail URLs are accessible**
  - **Validates: Requirements 3.2**

- [ ]* 3.3 Write property test for thumbnail regeneration
  - **Property 8: Missing thumbnails are regenerated**
  - **Validates: Requirements 3.4**

- [x] 4. Update project thumbnail handling





  - Modify project thumbnail upload to use only relative paths
  - Update project thumbnail serving logic to resolve relative paths
  - Ensure project model stores only relative paths
  - _Requirements: 2.1, 2.3, 3.1_

- [ ]* 4.1 Write property test for project thumbnail paths
  - **Property 16: Project thumbnail paths are relative**
  - **Validates: Requirements 2.1, 2.3**

- [x] 4.5 Update user avatar handling to use only relative paths





  - Modify user avatar upload to use only relative paths
  - Update user avatar storage logic to use FileHandler methods
  - Create avatar serving endpoint to resolve relative paths
  - Ensure user model stores only relative paths
  - _Requirements: 2.4, 3.2, 3.4_

- [ ]* 4.6 Write property test for user avatar paths
  - **Property 17: User avatar paths are relative**
  - **Validates: Requirements 2.4, 3.2**

- [ ]* 4.7 Write property test for avatar serving
  - **Property 18: Avatar serving resolves paths correctly**
  - **Validates: Requirements 3.4**

- [ ] 5. Run database migration and validate results
  - Execute migration script on development database
  - Validate that all file paths are now relative
  - Test file serving endpoints with migrated data
  - Verify thumbnail URLs work correctly after migration
  - _Requirements: 1.5, 4.3, 4.5_

- [ ]* 5.1 Write property test for post-migration consistency
  - **Property 13: Post-migration path consistency**
  - **Validates: Requirements 4.2, 4.5**

- [ ]* 5.2 Write property test for avatar migration
  - **Property 19: Avatar migration converts paths to relative**
  - **Validates: Requirements 1.4, 4.6**

- [ ]* 5.3 Write property test for avatar serving after migration
  - **Property 20: Avatar file serving works after migration**
  - **Validates: Requirements 4.6**

- [ ] 6. Add system portability support
  - Ensure file resolution works when backend directory changes
  - Test path resolution with different backend locations
  - Validate that database changes are not required for portability
  - _Requirements: 4.4_

- [ ]* 6.1 Write property test for system portability
  - **Property 10: System portability**
  - **Validates: Requirements 4.4**

- [ ] 7. Update error handling and logging
  - Add clear error messages for file not found scenarios
  - Improve logging for path resolution debugging
  - Handle edge cases gracefully with appropriate HTTP status codes
  - _Requirements: 3.5_

- [ ]* 7.1 Write unit test for 404 error handling
  - Test that missing files return proper 404 responses
  - **Validates: Requirements 3.5**

- [ ] 8. Checkpoint - Ensure all tests pass
  - Ensure all tests pass, ask the user if questions arise.

- [ ] 9. Create production migration script and documentation
  - Create standalone migration script for production use
  - Add documentation for deployment and migration process
  - Include validation steps to verify migration success
  - _Requirements: 1.4, 1.5_

- [ ] 10. Final integration testing
  - Test complete file upload and serving workflow
  - Verify thumbnail generation and serving works correctly
  - Test avatar upload and serving workflow
  - Test cross-platform compatibility scenarios
  - Validate migration process with real data
  - _Requirements: 3.2, 3.3, 3.4, 4.3, 4.6_

- [ ] 11. Final Checkpoint - Ensure all tests pass
  - Ensure all tests pass, ask the user if questions arise.