# task-management Specification

## Purpose
TBD - created by archiving change fix-v2-api-ui-issues. Update Purpose after archive.
## Requirements
### Requirement: Task Result Generation
The OCR service SHALL generate both JSON and Markdown result files for completed tasks with actual content, including processing track information and enhanced structure data.

#### Scenario: Markdown file contains OCR results
- **WHEN** a task completes OCR processing successfully
- **THEN** the generated `.md` file SHALL contain the extracted text in markdown format
- **AND** the file size SHALL be greater than 0 bytes
- **AND** the markdown SHALL include headings, paragraphs, and formatting based on OCR layout detection

#### Scenario: Result files stored in task directory
- **WHEN** OCR processing completes for task ID `88c6c2d2-37e1-48fd-a50f-406142987bdf`
- **THEN** result files SHALL be stored in `storage/results/88c6c2d2-37e1-48fd-a50f-406142987bdf/`
- **AND** both `<filename>_result.json` and `<filename>_result.md` SHALL exist
- **AND** both files SHALL contain valid OCR output data

#### Scenario: Include processing track in results
- **WHEN** a task completes through dual-track processing
- **THEN** the JSON result SHALL include "processing_track" field
- **AND** SHALL indicate whether "ocr" or "direct" track was used
- **AND** SHALL include track-specific metadata (confidence for OCR, extraction quality for direct)

#### Scenario: Store UnifiedDocument format
- **WHEN** processing completes through either track
- **THEN** system SHALL save results in UnifiedDocument format
- **AND** maintain backward-compatible JSON structure
- **AND** include enhanced structure from PP-StructureV3 or PyMuPDF

### Requirement: Task Detail View
The frontend SHALL provide a dedicated page for viewing individual task details with processing track information, enhanced preview capabilities, and file availability status.

#### Scenario: Navigate to task detail page
- **WHEN** user clicks "View Details" button on task in Task History page
- **THEN** browser SHALL navigate to `/tasks/{task_id}`
- **AND** TaskDetailPage component SHALL render

#### Scenario: Display task information
- **WHEN** TaskDetailPage loads for a valid task ID
- **THEN** page SHALL display task metadata (filename, status, processing time, confidence)
- **AND** page SHALL show markdown preview of OCR results
- **AND** page SHALL provide download buttons for JSON, Markdown, and PDF formats

#### Scenario: Download from task detail page
- **WHEN** user clicks download button for a specific format
- **THEN** browser SHALL download the file using `/api/v2/tasks/{task_id}/download/{format}` endpoint
- **AND** downloaded file SHALL contain the task's OCR results in requested format

#### Scenario: Display processing track information
- **WHEN** viewing task processed through dual-track system
- **THEN** page SHALL display processing track used (OCR or Direct)
- **AND** show track-specific metrics (OCR confidence or extraction quality)
- **AND** provide option to reprocess with alternate track if applicable

#### Scenario: Preview document structure
- **WHEN** user enables structure view
- **THEN** page SHALL display document element hierarchy
- **AND** show bounding boxes overlay on preview
- **AND** highlight different element types (headers, tables, lists) with distinct colors

#### Scenario: Display file unavailable status
- **WHEN** task has `file_deleted=True`
- **THEN** page SHALL show file unavailable indicator
- **AND** download buttons SHALL be disabled or hidden
- **AND** page SHALL display explanation that files were cleaned up

### Requirement: Results Page V2 Migration
The Results page SHALL use V2 task-based APIs instead of V1 batch APIs.

#### Scenario: Load task results instead of batch
- **WHEN** Results page loads with a task ID in upload store
- **THEN** page SHALL call `apiClientV2.getTask(taskId)` to fetch task details
- **AND** page SHALL NOT call any V1 batch status endpoints
- **AND** task information SHALL display correctly

#### Scenario: Handle missing task gracefully
- **WHEN** Results page loads without a task ID
- **THEN** page SHALL display helpful message directing user to upload page
- **AND** page SHALL provide button to navigate to `/upload`

### Requirement: Processing Track Management
The task management system SHALL track and display processing track information for all tasks.

#### Scenario: Track processing route selection
- **WHEN** a task begins processing
- **THEN** system SHALL record the selected processing track
- **AND** log the reason for track selection
- **AND** store auto-detection confidence score

#### Scenario: Allow track override
- **WHEN** user views a completed task
- **THEN** system SHALL offer option to reprocess with different track
- **AND** maintain both results for comparison
- **AND** track which result user prefers

#### Scenario: Display processing metrics
- **WHEN** task completes processing
- **THEN** system SHALL record track-specific metrics
- **AND** OCR track SHALL show confidence scores and character count
- **AND** Direct track SHALL show extraction coverage and structure quality

### Requirement: Task Processing History
The system SHALL maintain detailed processing history for tasks including track changes and reprocessing.

#### Scenario: Record reprocessing attempts
- **WHEN** a task is reprocessed with different track
- **THEN** system SHALL maintain processing history
- **AND** store results from each attempt
- **AND** allow comparison between different processing attempts

#### Scenario: Track quality improvements
- **WHEN** viewing task history
- **THEN** system SHALL show quality metrics over time
- **AND** indicate if reprocessing improved results
- **AND** suggest optimal track based on document characteristics

#### Scenario: Export processing analytics
- **WHEN** exporting task data
- **THEN** system SHALL include processing history
- **AND** provide track selection statistics
- **AND** include performance metrics for each processing attempt

### Requirement: Soft Delete Tasks
The system SHALL support soft deletion of tasks, marking them as deleted without removing database records to preserve usage statistics.

#### Scenario: User soft deletes a task
- **WHEN** user calls DELETE on `/api/v2/tasks/{task_id}`
- **THEN** system SHALL set `deleted_at` timestamp on the task record
- **AND** system SHALL NOT delete the actual files
- **AND** system SHALL NOT remove the database record
- **AND** subsequent user queries SHALL NOT return this task

#### Scenario: Preserve statistics after soft delete
- **WHEN** a task is soft deleted
- **THEN** admin statistics endpoints SHALL continue to include this task's metrics
- **AND** translation token counts SHALL remain in cumulative totals
- **AND** processing time statistics SHALL remain accurate

### Requirement: File Cleanup Scheduler
The system SHALL automatically clean up old files while preserving database records for statistics tracking.

#### Scenario: Scheduled file cleanup
- **WHEN** cleanup scheduler runs (configurable interval, default daily)
- **THEN** system SHALL identify tasks where files can be deleted
- **AND** system SHALL retain newest N files per user (configurable, default 50)
- **AND** system SHALL delete actual files from disk for older tasks
- **AND** system SHALL set `file_deleted=True` on cleaned tasks
- **AND** system SHALL NOT delete any database records

#### Scenario: File retention per user
- **WHEN** user has more than `max_files_per_user` tasks with files
- **THEN** cleanup SHALL delete files for oldest tasks exceeding the limit
- **AND** cleanup SHALL preserve the newest `max_files_per_user` task files
- **AND** task ordering SHALL be by `created_at` descending

#### Scenario: Manual cleanup trigger
- **WHEN** admin calls POST `/api/v2/admin/cleanup/trigger`
- **THEN** system SHALL immediately run the cleanup process
- **AND** return summary of files deleted and space freed

### Requirement: Admin Task Visibility
Admin users SHALL have full visibility into all tasks including soft-deleted and file-cleaned tasks.

#### Scenario: Admin lists all tasks
- **WHEN** admin calls GET `/api/v2/admin/tasks`
- **THEN** response SHALL include all tasks from all users
- **AND** response SHALL include soft-deleted tasks
- **AND** response SHALL include tasks with deleted files
- **AND** each task SHALL indicate its deletion status

#### Scenario: Filter admin task list
- **WHEN** admin calls GET `/api/v2/admin/tasks` with filters
- **THEN** `include_deleted=false` SHALL exclude soft-deleted tasks
- **AND** `include_files_deleted=false` SHALL exclude file-cleaned tasks
- **AND** `user_id={id}` SHALL filter to specific user's tasks

#### Scenario: View storage usage statistics
- **WHEN** admin calls GET `/api/v2/admin/storage/stats`
- **THEN** response SHALL include total storage used
- **AND** response SHALL include per-user storage breakdown
- **AND** response SHALL include count of tasks with/without files

### Requirement: User Task Isolation
Regular users SHALL only see their own tasks and soft-deleted tasks SHALL be hidden from their view.

#### Scenario: User lists own tasks
- **WHEN** authenticated user calls GET `/api/v2/tasks`
- **THEN** response SHALL only include tasks owned by that user
- **AND** response SHALL NOT include soft-deleted tasks
- **AND** response SHALL include tasks with deleted files (showing file unavailable status)

#### Scenario: User cannot access other user's tasks
- **WHEN** user attempts to access task owned by another user
- **THEN** system SHALL return 404 Not Found
- **AND** system SHALL NOT reveal that the task exists