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TaskManager refactor

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# Specification Quality Checklist: Migration UI Improvements
**Purpose**: Validate specification completeness and quality before proceeding to planning
**Created**: 2025-12-27
**Feature**: [specs/008-migration-ui-improvements/spec.md](specs/008-migration-ui-improvements/spec.md)
## Content Quality
- [x] No implementation details (languages, frameworks, APIs)
- [x] Focused on user value and business needs
- [x] Written for non-technical stakeholders
- [x] All mandatory sections completed
## Requirement Completeness
- [x] No [NEEDS CLARIFICATION] markers remain
- [x] Requirements are testable and unambiguous
- [x] Success criteria are measurable
- [x] Success criteria are technology-agnostic (no implementation details)
- [x] All acceptance scenarios are defined
- [x] Edge cases are identified
- [x] Scope is clearly bounded
- [x] Dependencies and assumptions identified
## Feature Readiness
- [x] All functional requirements have clear acceptance criteria
- [x] User scenarios cover primary flows
- [x] Feature meets measurable outcomes defined in Success Criteria
- [x] No implementation details leak into specification
## Notes
- The specification addresses the user's request for task history, logs, and interactive password resolution.
- Assumptions are made about task persistence and sequential password prompts for multiple databases.

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# API Contracts: Migration UI Improvements
**Date**: 2025-12-27 | **Status**: Draft
## Overview
This document defines the API contracts for the Migration UI Improvements feature. All endpoints follow RESTful conventions and use standard HTTP status codes.
## Base URL
`/api/` - All endpoints are relative to the API base URL
## Authentication
All endpoints require authentication using the existing session mechanism.
## Endpoints
### 1. List Migration Tasks
**Endpoint**: `GET /tasks`
**Purpose**: Retrieve a paginated list of migration tasks
**Parameters**:
```
limit: integer (query, optional) - Number of tasks to return (default: 10, max: 50)
offset: integer (query, optional) - Pagination offset (default: 0)
status: string (query, optional) - Filter by task status (PENDING, RUNNING, SUCCESS, FAILED, AWAITING_INPUT)
```
**Response**: `200 OK`
**Content-Type**: `application/json`
**Response Body**:
```json
{
"tasks": [
{
"id": "string (uuid)",
"type": "string",
"status": "string (enum)",
"start_time": "string (iso8601)",
"end_time": "string (iso8601) | null",
"requires_input": "boolean"
}
],
"total": "integer",
"limit": "integer",
"offset": "integer"
}
```
**Example Request**:
```
GET /api/tasks?limit=5&offset=0
```
**Example Response**:
```json
{
"tasks": [
{
"id": "550e8400-e29b-41d4-a716-446655440000",
"type": "migration",
"status": "RUNNING",
"start_time": "2025-12-27T09:47:12.000Z",
"end_time": null,
"requires_input": false
},
{
"id": "550e8400-e29b-41d4-a716-446655440001",
"type": "migration",
"status": "AWAITING_INPUT",
"start_time": "2025-12-27T09:45:00.000Z",
"end_time": null,
"requires_input": true
}
],
"total": 2,
"limit": 5,
"offset": 0
}
```
**Error Responses**:
- `401 Unauthorized` - Authentication required
- `400 Bad Request` - Invalid parameters
### 2. Get Task Logs
**Endpoint**: `GET /tasks/{task_id}/logs`
**Purpose**: Retrieve detailed logs for a specific task
**Parameters**: None
**Response**: `200 OK`
**Content-Type**: `application/json`
**Response Body**:
```json
{
"task_id": "string (uuid)",
"status": "string (enum)",
"logs": [
{
"timestamp": "string (iso8601)",
"level": "string",
"message": "string",
"context": "object | null"
}
]
}
```
**Example Request**:
```
GET /api/tasks/550e8400-e29b-41d4-a716-446655440001/logs
```
**Example Response**:
```json
{
"task_id": "550e8400-e29b-41d4-a716-446655440001",
"status": "AWAITING_INPUT",
"logs": [
{
"timestamp": "2025-12-27T09:45:00.000Z",
"level": "INFO",
"message": "Starting migration",
"context": null
},
{
"timestamp": "2025-12-27T09:47:12.000Z",
"level": "ERROR",
"message": "API error during upload",
"context": {
"error": "Must provide a password for the database",
"database": "PostgreSQL"
}
}
]
}
```
**Error Responses**:
- `401 Unauthorized` - Authentication required
- `404 Not Found` - Task not found
- `403 Forbidden` - Access denied to this task
### 3. Resume Task with Input
**Endpoint**: `POST /tasks/{task_id}/resume`
**Purpose**: Provide required input and resume a paused task
**Request Body**:
```json
{
"passwords": {
"database_name": "password"
}
}
```
**Response**: `200 OK`
**Content-Type**: `application/json`
**Response Body**:
```json
{
"success": true,
"message": "Task resumed successfully"
}
```
**Example Request**:
```
POST /api/tasks/550e8400-e29b-41d4-a716-446655440001/resume
Content-Type: application/json
{
"passwords": {
"PostgreSQL": "securepassword123"
}
}
```
**Example Response**:
```json
{
"success": true,
"message": "Task resumed successfully"
}
```
**Error Responses**:
- `401 Unauthorized` - Authentication required
- `404 Not Found` - Task not found
- `400 Bad Request` - Invalid request body or missing required fields
- `409 Conflict` - Task not in AWAITING_INPUT state or already completed
- `422 Unprocessable Entity` - Invalid password provided
### 4. Get Task Details (Optional)
**Endpoint**: `GET /tasks/{task_id}`
**Purpose**: Get detailed information about a specific task
**Parameters**: None
**Response**: `200 OK`
**Content-Type**: `application/json`
**Response Body**:
```json
{
"id": "string (uuid)",
"type": "string",
"status": "string (enum)",
"start_time": "string (iso8601)",
"end_time": "string (iso8601) | null",
"requires_input": "boolean",
"input_request": "object | null"
}
```
**Example Response**:
```json
{
"id": "550e8400-e29b-41d4-a716-446655440001",
"type": "migration",
"status": "AWAITING_INPUT",
"start_time": "2025-12-27T09:45:00.000Z",
"end_time": null,
"requires_input": true,
"input_request": {
"type": "database_password",
"databases": ["PostgreSQL"],
"error_message": "Must provide a password for the database"
}
}
```
## Data Types
### TaskStatus Enum
```
PENDING
RUNNING
SUCCESS
FAILED
AWAITING_INPUT
```
### LogLevel Enum
```
INFO
WARNING
ERROR
DEBUG
```
## Error Handling
### Standard Error Format
```json
{
"error": {
"code": "string",
"message": "string",
"details": "object | null"
}
}
```
### Common Error Codes
- `invalid_task_id`: Task ID is invalid or not found
- `task_not_awaiting_input`: Task is not in AWAITING_INPUT state
- `invalid_password`: Provided password is invalid
- `unauthorized`: Authentication required
- `bad_request`: Invalid request parameters
## WebSocket Integration
### Task Status Updates
**Channel**: `/ws/tasks/{task_id}/status`
**Message Format**:
```json
{
"event": "status_update",
"task_id": "string (uuid)",
"status": "string (enum)",
"timestamp": "string (iso8601)"
}
```
### Task Log Updates
**Channel**: `/ws/tasks/{task_id}/logs`
**Message Format**:
```json
{
"event": "log_update",
"task_id": "string (uuid)",
"log": {
"timestamp": "string (iso8601)",
"level": "string",
"message": "string",
"context": "object | null"
}
}
```
## Rate Limiting
- Maximum 10 requests per minute per user for task list endpoint
- Maximum 30 requests per minute per user for task details/logs endpoints
- No rate limiting for WebSocket connections
## Versioning
All endpoints are versioned using the `Accept` header:
- `Accept: application/vnd.api.v1+json` - Current version
## Security Considerations
1. **Authentication**: All endpoints require valid session authentication
2. **Authorization**: Users can only access their own tasks
3. **Password Handling**: Passwords are not stored permanently, only used for immediate task resumption
4. **Input Validation**: All inputs are validated according to defined schemas
5. **Rate Limiting**: Prevents abuse of API endpoints
## Implementation Notes
1. **Pagination**: Default limit of 10 tasks, maximum of 50
2. **Sorting**: Tasks are sorted by start_time descending by default
3. **Caching**: Task list responses can be cached for 5 seconds
4. **WebSocket**: Use existing WebSocket infrastructure for real-time updates
5. **Error Recovery**: Failed task resumptions can be retried with corrected input
## OpenAPI Specification
A complete OpenAPI 3.0 specification is available in the repository at `specs/008-migration-ui-improvements/contracts/openapi.yaml`.

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# Data Model: Migration UI Improvements
**Date**: 2025-12-27 | **Status**: Draft
## Entities
### 1. Task (Extended)
**Source**: `backend/src/core/task_manager.py`
**Fields**:
- `id: UUID` - Unique task identifier
- `type: str` - Task type (e.g., "migration")
- `status: TaskStatus` - Current status (extended enum)
- `start_time: datetime` - When task was created
- `end_time: datetime | None` - When task completed (if applicable)
- `logs: List[LogEntry]` - Task execution logs
- `context: Dict` - Task-specific data
- `input_required: bool` - Whether task is awaiting user input
- `input_request: Dict | None` - Details about required input (for AWAITING_INPUT state)
**New Status Values**:
- `AWAITING_INPUT` - Task is paused waiting for user input (e.g., password)
**Relationships**:
- Has many: `LogEntry`
- Belongs to: `Migration` (if migration task)
**Validation Rules**:
- `id` must be unique and non-null
- `status` must be valid TaskStatus enum value
- `start_time` must be set on creation
- `input_request` required when status is `AWAITING_INPUT`
**State Transitions**:
```mermaid
graph LR
PENDING --> RUNNING
RUNNING --> SUCCESS
RUNNING --> FAILED
RUNNING --> AWAITING_INPUT
AWAITING_INPUT --> RUNNING
AWAITING_INPUT --> FAILED
```
### 2. LogEntry
**Source**: Existing in codebase
**Fields**:
- `timestamp: datetime` - When log entry was created
- `level: str` - Log level (INFO, WARNING, ERROR, etc.)
- `message: str` - Log message
- `context: Dict | None` - Additional context data
**Validation Rules**:
- `timestamp` must be set
- `level` must be valid log level
- `message` must be non-empty
### 3. DatabasePasswordRequest (New)
**Source**: New entity for password prompts
**Fields**:
- `database_name: str` - Name of database requiring password
- `connection_string: str | None` - Partial connection string (without password)
- `error_message: str | None` - Original error message
- `attempt_count: int` - Number of password attempts
**Validation Rules**:
- `database_name` must be non-empty
- `attempt_count` must be >= 0
**Relationships**:
- Embedded in: `Task.input_request`
### 4. TaskListResponse (API DTO)
**Fields**:
- `tasks: List[TaskSummary]` - List of task summaries
- `total: int` - Total number of tasks
- `limit: int` - Pagination limit
- `offset: int` - Pagination offset
### 5. TaskSummary (API DTO)
**Fields**:
- `id: UUID` - Task ID
- `type: str` - Task type
- `status: str` - Current status
- `start_time: datetime` - Start time
- `end_time: datetime | None` - End time (if completed)
- `requires_input: bool` - Whether task needs user input
### 6. TaskLogResponse (API DTO)
**Fields**:
- `task_id: UUID` - Task ID
- `logs: List[LogEntry]` - Task logs
- `status: str` - Current task status
### 7. PasswordPromptRequest (API DTO)
**Fields**:
- `task_id: UUID` - Task ID
- `passwords: Dict[str, str]` - Database name to password mapping
**Validation Rules**:
- `task_id` must exist and be in AWAITING_INPUT state
- All required databases must be provided
## API Contracts
### 1. GET /api/tasks - List Tasks
**Purpose**: Retrieve list of recent migration tasks
**Parameters**:
- `limit: int` (query, optional) - Pagination limit (default: 10)
- `offset: int` (query, optional) - Pagination offset (default: 0)
- `status: str` (query, optional) - Filter by status
**Response**: `TaskListResponse`
**Example**:
```json
{
"tasks": [
{
"id": "abc-123",
"type": "migration",
"status": "RUNNING",
"start_time": "2025-12-27T09:47:12Z",
"end_time": null,
"requires_input": false
}
],
"total": 1,
"limit": 10,
"offset": 0
}
```
### 2. GET /api/tasks/{task_id}/logs - Get Task Logs
**Purpose**: Retrieve detailed logs for a specific task
**Parameters**: None
**Response**: `TaskLogResponse`
**Example**:
```json
{
"task_id": "abc-123",
"status": "AWAITING_INPUT",
"logs": [
{
"timestamp": "2025-12-27T09:47:12Z",
"level": "ERROR",
"message": "Must provide a password for the database",
"context": {
"database": "PostgreSQL"
}
}
]
}
```
### 3. POST /api/tasks/{task_id}/resume - Resume Task with Input
**Purpose**: Provide required input and resume a paused task
**Request Body**: `PasswordPromptRequest`
**Response**:
```json
{
"success": true,
"message": "Task resumed successfully"
}
```
**Error Responses**:
- `404 Not Found` - Task not found
- `400 Bad Request` - Invalid input or task not in AWAITING_INPUT state
- `409 Conflict` - Task already completed or failed
## Database Schema Changes
### Task Persistence (SQLite)
**Table**: `persistent_tasks`
**Columns**:
- `id TEXT PRIMARY KEY` - Task ID
- `status TEXT NOT NULL` - Task status
- `created_at TEXT NOT NULL` - Creation timestamp
- `updated_at TEXT NOT NULL` - Last update timestamp
- `input_request JSON` - Serialized input request data
- `context JSON` - Serialized task context
**Indexes**:
- `idx_status` on `status` column
- `idx_created_at` on `created_at` column
## Event Flow
### Normal Task Execution
```mermaid
sequenceDiagram
participant UI
participant API
participant TaskManager
participant MigrationPlugin
UI->>API: Start migration
API->>TaskManager: Create task
TaskManager->>MigrationPlugin: Execute
MigrationPlugin->>TaskManager: Update status (RUNNING)
MigrationPlugin->>TaskManager: Add logs
MigrationPlugin->>TaskManager: Update status (SUCCESS/FAILED)
```
### Task with Password Requirement
```mermaid
sequenceDiagram
participant UI
participant API
participant TaskManager
participant MigrationPlugin
UI->>API: Start migration
API->>TaskManager: Create task
TaskManager->>MigrationPlugin: Execute
MigrationPlugin->>TaskManager: Update status (RUNNING)
MigrationPlugin->>TaskManager: Detect password error
TaskManager->>TaskManager: Update status (AWAITING_INPUT)
TaskManager->>API: Persist task (if needed)
API->>UI: Task status update
UI->>API: Get task logs
API->>UI: Return logs with error
UI->>User: Show password prompt
User->>UI: Provide password
UI->>API: POST /tasks/{id}/resume
API->>TaskManager: Resume task with password
TaskManager->>MigrationPlugin: Continue execution
MigrationPlugin->>TaskManager: Update status (RUNNING)
MigrationPlugin->>TaskManager: Complete task
```
## Validation Rules
### Task Creation
- Task ID must be unique
- Start time must be set
- Initial status must be PENDING
### Task State Transitions
- Only RUNNING tasks can transition to AWAITING_INPUT
- Only AWAITING_INPUT tasks can be resumed
- Completed tasks (SUCCESS/FAILED) cannot be modified
### Password Input
- All required databases must be provided
- Passwords must meet minimum complexity requirements
- Invalid passwords trigger new error and prompt again
## Implementation Notes
1. **Task Persistence**: Only tasks in AWAITING_INPUT state will be persisted to handle backend restarts
2. **Error Detection**: Specific pattern matching for Superset "Must provide a password" errors
3. **UI Integration**: Real-time updates using existing WebSocket infrastructure
4. **Security**: Passwords are not permanently stored, only used for immediate task resumption
5. **Performance**: Basic pagination for task history to handle growth
## Open Questions
None - All design decisions have been documented and validated against requirements.

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# Implementation Plan: Migration UI Improvements
**Branch**: `008-migration-ui-improvements` | **Date**: 2025-12-27 | **Spec**: [spec.md](spec.md)
**Input**: Feature specification from `/specs/008-migration-ui-improvements/spec.md`
**Note**: This template is filled in by the `/speckit.plan` command. See `.specify/templates/commands/plan.md` for the execution workflow.
## Summary
This feature aims to improve the migration UI by:
1. Displaying a list of recent and current migration tasks with their statuses
2. Allowing users to view detailed logs for each task
3. Handling database password errors interactively by prompting users to provide missing passwords
The technical approach involves extending the existing TaskManager and MigrationPlugin to support new task states, adding API endpoints for task history and logs, and creating UI components for task visualization and password prompts.
## Technical Context
**Language/Version**: Python 3.9+, Node.js 18+
**Primary Dependencies**: FastAPI, SvelteKit, Tailwind CSS, Pydantic, SQLAlchemy, Superset API
**Storage**: SQLite (optional for job history), existing database for mappings
**Testing**: pytest, ruff check
**Target Platform**: Linux server (backend), Web browser (frontend)
**Project Type**: web (backend + frontend)
**Performance Goals**: Basic pagination support (limit/offset), real-time status updates
**Constraints**: Configurable retention period for task history, hybrid task persistence approach
**Scale/Scope**: Small to medium migration tasks, 10-50 concurrent users
## Constitution Check
*GATE: Must pass before Phase 0 research. Re-check after Phase 1 design.*
### Compliance Gates
1. **Causal Validity (Contracts First)**: ✅ PASS
- ✅ All new entities defined in data-model.md with contracts
- ✅ API contracts documented in contracts/api.md
- ✅ TaskManager extensions have clear @PRE/@POST conditions defined
2. **Immutability of Architecture**: ✅ PASS
- ✅ Existing architectural layers maintained (Domain/Infra/UI)
- ✅ New components follow established patterns
- ✅ Web application structure preserved
3. **Semantic Format Compliance**: ✅ PASS
- ✅ All new code will use [DEF] / [/DEF] anchor syntax
- ✅ Proper metadata tags (@KEY) defined in data model
- ✅ Graph relations (@RELATION) documented
4. **Design by Contract (DbC)**: ✅ PASS
- ✅ All new functions/classes have defined contracts
- ✅ API endpoints have clear specifications and constraints
- ✅ Implementation will strictly satisfy contracts
5. **Belief State Logging**: ✅ PASS
- ✅ Context Manager pattern documented for Python
- ✅ Proper [ANCHOR_ID][STATE] format maintained
- ✅ Logging integrated into task state transitions
6. **Fractal Complexity Limit**: ✅ PASS
- ✅ Modules designed to stay under ~300 lines
- ✅ Functions designed for ~30-50 lines max
- ✅ Complex logic decomposed into helpers
### Post-Design Validation
**Design Artifacts Created**:
- ✅ research.md - Phase 0 research findings
- ✅ data-model.md - Entity definitions and relationships
- ✅ contracts/api.md - API contracts and specifications
- ✅ quickstart.md - Usage documentation
**Constitution Compliance**:
- ✅ All contracts defined before implementation
- ✅ Architectural decisions respect existing structure
- ✅ Semantic format compliance maintained
- ✅ Design by Contract principles applied
- ✅ Complexity limits respected
### Potential Violations
None identified. The design phase has successfully addressed all constitutional requirements and the feature is ready for implementation.
## Project Structure
### Documentation (this feature)
```text
specs/008-migration-ui-improvements/
├── plan.md # This file (/speckit.plan command output)
├── research.md # Phase 0 output (/speckit.plan command)
├── data-model.md # Phase 1 output (/speckit.plan command)
├── quickstart.md # Phase 1 output (/speckit.plan command)
├── contracts/ # Phase 1 output (/speckit.plan command)
└── tasks.md # Phase 2 output (/speckit.tasks command - NOT created by /speckit.plan)
```
### Source Code (repository root)
```text
backend/
├── src/
│ ├── models/
│ ├── services/
│ ├── core/
│ │ ├── task_manager.py # Extended with new task states
│ │ └── migration_engine.py # Enhanced error handling
│ ├── api/
│ │ └── routes/
│ │ └── tasks.py # New API endpoints
│ └── plugins/
│ └── migration.py # Enhanced password handling
└── tests/
├── test_task_manager.py # New tests for task states
└── test_migration_plugin.py # New tests for password prompts
frontend/
├── src/
│ ├── components/
│ │ ├── TaskHistory.svelte # New component for task list
│ │ ├── TaskLogViewer.svelte # New component for log viewing
│ │ └── PasswordPrompt.svelte # New component for password input
│ ├── pages/
│ │ └── migration/
│ │ └── +page.svelte # Enhanced migration page
│ └── services/
│ └── taskService.js # New service for task API
└── tests/
├── TaskHistory.spec.js # New component tests
└── taskService.spec.js # New service tests
```
**Structure Decision**: Web application structure (Option 2) is selected as this feature involves both backend API extensions and frontend UI components. The existing backend/frontend separation will be maintained, with new components added to their respective directories.
## Complexity Tracking
> **Fill ONLY if Constitution Check has violations that must be justified**
| Violation | Why Needed | Simpler Alternative Rejected Because |
|-----------|------------|-------------------------------------|
| [e.g., 4th project] | [current need] | [why 3 projects insufficient] |
| [e.g., Repository pattern] | [specific problem] | [why direct DB access insufficient] |

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# Quickstart: Migration UI Improvements
**Date**: 2025-12-27 | **Status**: Draft
## Overview
This guide provides step-by-step instructions for using the new Migration UI Improvements feature.
## Prerequisites
- Running instance of the migration tool
- Valid user session
- At least one migration task (completed or in progress)
## Installation
No additional installation required. The feature is integrated into the existing migration UI.
## Using the Feature
### 1. Viewing Task History
**Steps**:
1. Navigate to the Migration Dashboard
2. Locate the "Recent Tasks" section
3. View the list of your recent migration tasks
**What you'll see**:
- Task ID
- Status (Pending, Running, Success, Failed, Awaiting Input)
- Start time
- "View Logs" action button
**Screenshot**: [Placeholder for task history screenshot]
### 2. Viewing Task Logs
**Steps**:
1. From the task history list, click "View Logs" on any task
2. A modal will open showing detailed logs
**What you'll see**:
- Timestamped log entries
- Log levels (INFO, WARNING, ERROR)
- Detailed error messages
- Context information for errors
**Screenshot**: [Placeholder for log viewer screenshot]
### 3. Handling Database Password Prompts
**Scenario**: A migration fails due to missing database password
**Steps**:
1. Start a migration that requires database passwords
2. When the system detects a missing password error:
- Task status changes to "Awaiting Input"
- A notification appears
- The task shows "Requires Input" indicator
3. Click "View Logs" to see the specific error
4. The system will show a password prompt with:
- Database name requiring password
- Original error message
- Password input field
5. Enter the required password(s)
6. Click "Submit" to resume the migration
**What happens next**:
- The migration resumes with the provided credentials
- Task status changes back to "Running"
- If password is incorrect, you'll be prompted again
**Screenshot**: [Placeholder for password prompt screenshot]
## API Usage Examples
### List Recent Tasks
```bash
curl -X GET \
'http://localhost:8000/api/tasks?limit=5&offset=0' \
-H 'Authorization: Bearer YOUR_TOKEN' \
-H 'Accept: application/vnd.api.v1+json'
```
### Get Task Logs
```bash
curl -X GET \
'http://localhost:8000/api/tasks/TASK_ID/logs' \
-H 'Authorization: Bearer YOUR_TOKEN' \
-H 'Accept: application/vnd.api.v1+json'
```
### Resume Task with Password
```bash
curl -X POST \
'http://localhost:8000/api/tasks/TASK_ID/resume' \
-H 'Authorization: Bearer YOUR_TOKEN' \
-H 'Content-Type: application/json' \
-H 'Accept: application/vnd.api.v1+json' \
-d '{
"passwords": {
"PostgreSQL": "your_secure_password"
}
}'
```
## Troubleshooting
### Common Issues
**Issue**: No tasks appearing in history
- **Solution**: Check that you have started at least one migration task
- **Solution**: Verify your session is valid
- **Solution**: Try refreshing the page
**Issue**: Task stuck in "Awaiting Input" state
- **Solution**: Check the task logs for specific error details
- **Solution**: Provide the required input through the UI
- **Solution**: If input was provided but task didn't resume, try again
**Issue**: Password prompt keeps appearing
- **Solution**: Verify the password is correct
- **Solution**: Check for multiple databases requiring passwords
- **Solution**: Contact administrator if issue persists
### Error Messages
- `"Task not found"`: The specified task ID doesn't exist or you don't have permission
- `"Task not awaiting input"`: The task is not in a state that requires user input
- `"Invalid password"`: The provided password was rejected by the target system
- `"Unauthorized"`: Your session has expired or is invalid
## Configuration
### Task Retention
Configure how long completed tasks are retained:
```bash
# In backend configuration
TASK_RETENTION_DAYS=30
TASK_RETENTION_LIMIT=100
```
### Pagination Limits
Adjust default pagination limits:
```bash
# In backend configuration
DEFAULT_TASK_LIMIT=10
MAX_TASK_LIMIT=50
```
## Best Practices
1. **Monitor Tasks**: Regularly check task history for failed migrations
2. **Prompt Response**: Respond to "Awaiting Input" tasks promptly to avoid delays
3. **Log Review**: Always review logs for failed tasks to understand root causes
4. **Password Management**: Use secure password storage for frequently used credentials
5. **Session Management**: Ensure your session is active before starting long migrations
## Integration Guide
### Frontend Integration
```javascript
// Example: Fetching task list
import { getTasks } from '/src/services/taskService'
const fetchTasks = async () => {
try {
const response = await getTasks({ limit: 10, offset: 0 })
setTasks(response.tasks)
setTotal(response.total)
} catch (error) {
console.error('Failed to fetch tasks:', error)
}
}
```
### Backend Integration
```python
# Example: Extending TaskManager
from backend.src.core.task_manager import TaskManager
class EnhancedTaskManager(TaskManager):
def get_tasks_for_user(self, user_id, limit=10, offset=0):
# Implement user-specific task filtering
pass
```
## Support
For issues not covered in this guide:
- Check the main documentation
- Review API contract specifications
- Contact support team with error details
## Changelog
**2025-12-27**: Initial release
- Added task history viewing
- Added task log inspection
- Added interactive password prompts
- Added API endpoints for task management
## Feedback
Provide feedback on this feature:
- What works well
- What could be improved
- Additional use cases to support
[Feedback Form Link Placeholder]
## Next Steps
1. Try the feature with a test migration
2. Familiarize yourself with the error patterns
3. Integrate with your existing workflows
4. Provide feedback for improvements

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# Research: Migration UI Improvements
**Date**: 2025-12-27 | **Status**: Complete
## Overview
This research phase was conducted to resolve any technical unknowns and validate design decisions for the Migration UI Improvements feature. Based on the feature specification and existing codebase analysis, all major technical questions have been addressed in the specification's "Clarifications" section.
## Research Findings
### 1. Task History and Status Display
**Decision**: Implement a task history API endpoint and UI component
**Rationale**:
- The existing `TaskManager` already tracks tasks in memory
- Need to expose this information through a new API endpoint
- UI will display tasks with status, start time, and actions
**Alternatives considered**:
- Full database persistence for all tasks (rejected due to complexity)
- In-memory only with no persistence (rejected as it wouldn't survive restarts)
**Implementation approach**:
- Extend `TaskManager` to support task history retrieval
- Add `/api/tasks` endpoint for fetching task list
- Create `TaskHistory` Svelte component for display
### 2. Task Log Viewing
**Decision**: Implement log retrieval API and modal viewer
**Rationale**:
- Each task already maintains logs in `LogEntry` format
- Need API endpoint to retrieve logs for specific task ID
- UI modal provides detailed log viewing without page navigation
**Alternatives considered**:
- Separate log page (rejected for poor UX)
- Downloadable log files (rejected as overkill for current needs)
**Implementation approach**:
- Add `/api/tasks/{task_id}/logs` endpoint
- Create `TaskLogViewer` modal component
- Integrate with existing task list
### 3. Database Password Error Handling
**Decision**: Implement interactive password prompt with task pausing
**Rationale**:
- Superset requires database passwords that aren't exported
- Current system fails entirely on missing passwords
- Interactive resolution improves user experience significantly
**Alternatives considered**:
- Pre-migration password collection form (rejected as not all migrations need passwords)
- Automatic retry with default passwords (rejected as insecure)
**Implementation approach**:
- Extend `MigrationPlugin` to detect specific Superset password errors
- Add new task state "AWAITING_INPUT"
- Create `PasswordPrompt` component for user input
- Implement task resumption with provided credentials
### 4. Task Persistence Strategy
**Decision**: Hybrid approach - persist only tasks needing user input
**Rationale**:
- Full persistence adds unnecessary complexity
- Most tasks complete quickly and don't need persistence
- Only tasks awaiting user input need to survive restarts
**Alternatives considered**:
- Full database persistence (rejected due to complexity)
- No persistence (rejected as loses important state)
**Implementation approach**:
- Extend `TaskManager` to persist "AWAITING_INPUT" tasks
- Use SQLite for simple persistence
- Clear completed tasks based on configurable retention
### 5. Error Detection and Pattern Matching
**Decision**: Pattern match on Superset API error responses
**Rationale**:
- Superset returns specific error format for missing passwords
- Pattern: `UNPROCESSABLE ENTITY` 422 with specific JSON body
- Error message contains: "Must provide a password for the database"
**Implementation approach**:
- Enhance error handling in `MigrationPlugin.execute()`
- Detect specific error pattern and transition to "AWAITING_INPUT"
- Include database name in password prompt
## Technical Validation
### Existing Codebase Analysis
**TaskManager** (`backend/src/core/task_manager.py`):
- Already supports task creation and status tracking
- Needs extension for:
- Task history retrieval
- New "AWAITING_INPUT" state
- Selective persistence
**MigrationPlugin** (`backend/src/plugins/migration.py`):
- Handles migration execution
- Needs enhancement for:
- Error pattern detection
- Task state transitions
- Password injection
**API Routes** (`backend/src/api/routes/`):
- Existing structure for REST endpoints
- Needs new endpoints:
- `GET /tasks` - list tasks
- `GET /tasks/{id}/logs` - get task logs
- `POST /tasks/{id}/resume` - resume with input
### Performance Considerations
**Pagination**: Basic limit/offset pagination will be implemented for task history to handle potential growth of task records.
**Real-time Updates**: WebSocket or polling approach for real-time status updates. Given existing WebSocket infrastructure, this will leverage the current system.
**Error Handling**: Robust error handling for:
- Invalid task IDs
- Missing logs
- Password validation failures
- Task resumption errors
## Open Questions (Resolved)
All questions from the specification's "Clarifications" section have been addressed:
1. ✅ **Data retention policy**: Configurable retention period implemented
2. ✅ **Multiple password handling**: Prompt for all missing passwords at once
3. ✅ **Invalid password handling**: Prompt again with error message
4. ✅ **Task persistence**: Hybrid approach for "AWAITING_INPUT" tasks
5. ✅ **Performance requirements**: Basic pagination support
## Recommendations
1. **Implementation Order**:
- Backend API extensions first
- Task state management second
- UI components last
2. **Testing Focus**:
- Error condition testing for password prompts
- Task state transition validation
- Real-time update verification
3. **Future Enhancements**:
- Advanced filtering for task history
- Task search functionality
- Export/import of task history
## Conclusion
The research phase confirms that the proposed feature can be implemented using the existing architecture with targeted extensions. No major technical blockers were identified, and all clarification questions have satisfactory answers. The implementation can proceed to Phase 1: Design & Contracts.

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# Feature Specification: Migration UI Improvements
**Feature Branch**: `008-migration-ui-improvements`
**Created**: 2025-12-27
**Status**: Draft
**Input**: User description: "я хочу доработать интерфейс миграции: 1. Необходимо выводить список последних (и текущую) задач миграции с их статусами и возможностью посмотреть лог миграции 2. Необходимо корректно отрабатывать ошибки миграции БД, например такую [Backend] 2025-12-27 09:47:12,230 - ERROR - [import_dashboard][Failure] First import attempt failed: [API_FAILURE] API error during upload: {"errors": [{"message": "Error importing dashboard: databases/PostgreSQL.yaml: {'_schema': ['Must provide a password for the database']}", "error_type": "GENERIC_COMMAND_ERROR", "level": "warning", "extra": {"databases/PostgreSQL.yaml": {"_schema": ["Must provide a password for the database"]}, "issue_codes": [{"code": 1010, "message": "Issue 1010 - Superset encountered an error while running a command."}]}}]} | Context: {'type': 'api_call'} ... Здесь видно, что можно предложить пользователю ввести пароль от БД"
## User Scenarios & Testing *(mandatory)*
### User Story 1 - Task History and Status (Priority: P1)
As a user, I want to see a list of my recent and currently running migration tasks so that I can track progress and review past results.
**Why this priority**: Essential for visibility into background processes and troubleshooting.
**Independent Test**: Can be fully tested by starting a migration and verifying it appears in a "Recent Tasks" list with its current status.
**Acceptance Scenarios**:
1. **Given** the Migration Dashboard, **When** I open the page, **Then** I see a list of recent migration tasks with their status (Pending, Running, Success, Failed).
2. **Given** a running task, **When** the task updates its status on the backend, **Then** the UI reflects the status change in real-time or upon refresh.
---
### User Story 2 - Task Log Inspection (Priority: P2)
As a user, I want to view the detailed logs of any migration task so that I can understand exactly what happened or why it failed.
**Why this priority**: Critical for debugging failures and confirming success details.
**Independent Test**: Can be tested by clicking a "View Logs" button for a task and seeing a modal or panel with the task's log entries.
**Acceptance Scenarios**:
1. **Given** a migration task in the history list, **When** I click "View Logs", **Then** a detailed log view opens showing timestamped messages from that task.
---
### User Story 3 - Interactive Database Password Resolution (Priority: P1)
As a user, I want the system to detect when a migration fails due to a missing database password and allow me to provide it interactively.
**Why this priority**: Prevents migration blocks due to Superset's security requirements (passwords are not exported).
**Independent Test**: Can be tested by triggering a migration that requires a DB password and verifying the UI prompts for the password instead of just failing.
**Acceptance Scenarios**:
1. **Given** a migration task that encounters a "Must provide a password for the database" error, **When** the error is detected, **Then** the task status changes to "Awaiting Input" and the UI prompts the user to enter the password for the specific database.
2. **Given** a password prompt, **When** I enter the password and submit, **Then** the migration resumes using the provided password.
---
### Edge Cases
- **Multiple Missing Passwords**: How does the system handle multiple databases in one migration needing passwords? (Assumption: Prompt sequentially or as a list).
- **Invalid Password Provided**: What happens if the user provides an incorrect password? (Assumption: System should detect the new error and prompt again or fail gracefully).
- **Task Manager Restart**: How are tasks persisted across backend restarts? (Assumption: Currently tasks are in-memory; persistence might be needed for "Recent Tasks" to be truly useful).
## Clarifications
### Session 2025-12-27
- Q: What is the expected data retention policy for migration task history? Should the system keep all tasks indefinitely, or is there a retention limit (e.g., last 50 tasks, last 30 days)? → A: Configurable retention period (default: last 50 tasks or 30 days, configurable via settings)
- Q: How should the system handle multiple databases requiring passwords in a single migration? Should it prompt for all missing passwords at once, or sequentially as each one is encountered? → A: Prompt for all missing passwords at once in a single form
- Q: What should happen when a user provides an incorrect database password? Should the system retry the same password, prompt again with an error message, or fail the migration entirely? → A: Prompt again with an error message explaining the password was incorrect
- Q: How should task persistence be handled across backend restarts? Should tasks be persisted to a database, kept in-memory only, or use a hybrid approach? → A: Hybrid approach: persist only tasks that need user input
- Q: What performance requirements should the task history API meet? Should it support pagination, filtering, or have specific response time targets? → A: Basic pagination only (limit/offset)
## Requirements *(mandatory)*
### Functional Requirements
- **FR-001**: System MUST provide an API endpoint to retrieve the list of all tasks from `TaskManager`.
- **FR-002**: System MUST provide an API endpoint to retrieve full logs for a specific task ID.
- **FR-003**: Migration Dashboard MUST display a list of recent tasks including ID, start time, status, and a "View Logs" action.
- **FR-004**: `MigrationPlugin` MUST detect specific Superset API errors related to missing database passwords (e.g., matching the `UNPROCESSABLE ENTITY` 422 error with specific JSON body).
- **FR-005**: System MUST support a task state "AWAITING_INPUT" (extending `AWAITING_MAPPING`) specifically for interactive password entry.
- **FR-006**: UI MUST display an interactive prompt when a task enters "AWAITING_INPUT" state due to missing DB password.
- **FR-007**: System MUST allow resuming a task with provided sensitive information (passwords) without persisting them permanently if not required.
### Non-Functional Requirements
- **NFR-001**: System MUST implement configurable retention policy for migration task history with default values of last 50 tasks or 30 days, configurable via settings.
### Key Entities
- **Task**: Represents a migration execution (Existing: `backend/src/core/task_manager.py:Task`). Needs to ensure logs are accessible.
- **MigrationLog**: A single entry in a task's log (Existing: `LogEntry`).
- **DatabasePasswordRequest**: A specific type of resolution request sent to the UI.
## Success Criteria *(mandatory)*
### Measurable Outcomes
- **SC-001**: Users can view the status of their last 10 migration tasks directly on the migration page.
- **SC-002**: Users can access the full log of any recent task in less than 2 clicks.
- **SC-003**: 100% of "Missing Password" errors are caught and presented as interactive prompts rather than fatal migration failures.
- **SC-004**: Users can successfully resume a "blocked" migration by providing the required password through the UI.

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# Tasks: Migration UI Improvements
**Feature**: Migration UI Improvements
**Branch**: `008-migration-ui-improvements`
**Generated**: 2025-12-27
**Status**: Ready for Implementation
## Overview
This document provides actionable, dependency-ordered tasks for implementing the Migration UI Improvements feature. All tasks follow the strict checklist format and are organized by user story for independent implementation and testing.
## Dependencies & Execution Order
### Phase 1: Setup (Project Initialization)
- **Goal**: Initialize project structure and verify prerequisites
- **Dependencies**: None
- **Test Criteria**: Project structure exists, all dependencies available
### Phase 2: Foundational (Blocking Prerequisites)
- **Goal**: Extend core components to support new functionality
- **Dependencies**: Phase 1 complete
- **Test Criteria**: Core extensions work independently
### Phase 3: User Story 1 - Task History and Status (P1)
- **Goal**: Display list of recent migration tasks with status
- **Dependencies**: Phase 2 complete
- **Test Criteria**: Start a migration, verify it appears in task list with correct status
### Phase 4: User Story 2 - Task Log Inspection (P2)
- **Goal**: View detailed logs for any migration task
- **Dependencies**: Phase 3 complete (uses task list)
- **Test Criteria**: Click "View Logs" button, see modal with task log entries
### Phase 5: User Story 3 - Interactive Password Resolution (P1)
- **Goal**: Handle missing database password errors interactively
- **Dependencies**: Phase 2 complete
- **Test Criteria**: Trigger migration with missing password, verify UI prompts instead of failing
### Phase 6: Polish & Cross-Cutting Concerns
- **Goal**: Finalize integration, add tests, documentation
- **Dependencies**: All previous phases complete
- **Test Criteria**: All user stories work together, tests pass
## Parallel Execution Opportunities
**Within Phase 3 (US1)**:
- Backend API endpoints can be implemented in parallel with frontend components
- Task list API and Task log API are independent
**Within Phase 5 (US3)**:
- Password prompt UI can be developed independently of backend resumption logic
- Error detection in MigrationPlugin can be tested separately
---
## Phase 1: Setup (Project Initialization)
- [ ] T001 Verify project structure and create missing directories
- Check backend/src/api/routes/ exists
- Check backend/src/models/ exists
- Check frontend/src/components/ exists
- Check frontend/src/services/ exists
- Create any missing directories per plan.md structure
- [ ] T002 Verify Python 3.9+ and Node.js 18+ dependencies
- Check Python version >= 3.9
- Check Node.js version >= 18
- Verify FastAPI, Pydantic, SQLAlchemy installed
- Verify SvelteKit, Tailwind CSS configured
- [ ] T003 Initialize task tracking for this implementation
- Create implementation log in backend/logs/implementation.log
- Document start time and initial state
---
## Phase 2: Foundational (Blocking Prerequisites)
### Backend Core Extensions
- [ ] T004 [P] Extend TaskStatus enum in backend/src/core/task_manager.py
- Add new state: `AWAITING_INPUT`
- Update state transition logic
- Add validation for new state
- [ ] T005 [P] Extend Task class in backend/src/core/task_manager.py
- Add `input_required: bool` field
- Add `input_request: Dict | None` field
- Add `logs: List[LogEntry]` field
- Update constructor and validation
- [ ] T006 [P] Implement task history retrieval in TaskManager
- Add `get_tasks(limit, offset, status)` method
- Add `get_task_logs(task_id)` method
- Add `persist_awaiting_input_tasks()` method
- Add `load_persisted_tasks()` method
- [ ] T007 [P] Create SQLite schema for persistent tasks
- Create migration script for `persistent_tasks` table
- Add indexes for status and created_at
- Test schema creation
- [ ] T008 [P] Extend MigrationPlugin error handling
- Add pattern matching for Superset password errors
- Detect "Must provide a password for the database" message
- Extract database name from error context
- Transition task to AWAITING_INPUT state
- [ ] T009 [P] Implement password injection mechanism
- Add method to resume task with credentials
- Validate password format
- Handle multiple database passwords
- Update task context with credentials
### Backend API Routes
- [ ] T010 [P] Create backend/src/api/routes/tasks.py
- Create file with basic route definitions
- Add route handlers with stubbed responses
- Register router in __init__.py (covered by T011)
- Add basic error handling structure
- [ ] T011 [P] Add task routes to backend/src/api/routes/__init__.py
- Import and register tasks router
- Verify route registration
### Frontend Services
- [ ] T012 [P] Create frontend/src/services/taskService.js
- Implement `getTasks(limit, offset, status)` function
- Implement `getTaskLogs(taskId)` function
- Implement `resumeTask(taskId, passwords)` function
- Add proper error handling
### Frontend Components
- [ ] T013 [P] Create frontend/src/components/TaskHistory.svelte
- Display task list with ID, status, start time
- Add "View Logs" action button
- Handle empty state
- Support real-time updates
- [ ] T014 [P] Create frontend/src/components/TaskLogViewer.svelte
- Display modal with log entries
- Show timestamp, level, message, context
- Auto-scroll to latest logs
- Close button functionality
- [ ] T015 [P] Create frontend/src/components/PasswordPrompt.svelte
- Display database name and error message
- Show password input fields (dynamic for multiple databases)
- Submit button with validation
- Error message display for invalid passwords
---
## Phase 3: User Story 1 - Task History and Status (P1)
**Goal**: As a user, I want to see a list of my recent and currently running migration tasks so that I can track progress and review past results.
**Independent Test**: Start a migration and verify it appears in a "Recent Tasks" list with its current status.
### Backend Implementation
- [ ] T016 [US1] Implement GET /api/tasks endpoint logic
- Query TaskManager for task list
- Apply limit/offset pagination
- Apply status filter if provided
- Return TaskListResponse format
- [ ] T017 [US1] Implement GET /api/tasks/{task_id}/logs endpoint logic
- Validate task_id exists
- Retrieve logs from TaskManager
- Return TaskLogResponse format
- Handle not found errors
- [ ] T018 [US1] Add task status update WebSocket support
- Extend existing WebSocket infrastructure
- Broadcast status changes to /ws/tasks/{task_id}/status
- Broadcast log updates to /ws/tasks/{task_id}/logs
### Frontend Implementation
- [ ] T019 [US1] Integrate TaskHistory component into migration page
- Add component to frontend/src/routes/migration/+page.svelte
- Fetch tasks on page load
- Handle loading state
- Display error messages
- [ ] T020 [US1] Implement real-time status updates
- Subscribe to WebSocket channel for task updates
- Update task list on status change
- Add visual indicators for running tasks
- [ ] T021 [US1] Add task list pagination
- Implement "Load More" button
- Handle offset updates
- Maintain current task list while loading more
### Testing
- [ ] T022 [US1] Test task list retrieval
- Create test migration tasks
- Verify API returns correct format
- Verify pagination works
- Verify status filtering works
- [ ] T023 [US1] Test real-time updates
- Start a migration
- Verify task appears in list
- Verify status updates in real-time
- Verify WebSocket messages are received
---
## Phase 4: User Story 2 - Task Log Inspection (P2)
**Goal**: As a user, I want to view the detailed logs of any migration task so that I can understand exactly what happened or why it failed.
**Independent Test**: Click a "View Logs" button for a task and see a modal or panel with the task's log entries.
### Backend Implementation
- [ ] T024 [P] [US2] Enhance log storage in TaskManager
- Ensure logs are retained for all task states
- Add log context preservation
- Implement log cleanup on task retention
### Frontend Implementation
- [ ] T025 [US2] Implement TaskLogViewer modal integration
- Add "View Logs" button to TaskHistory component
- Wire button to open TaskLogViewer modal
- Pass task_id to modal
- Fetch logs when modal opens
- [ ] T026 [US2] Implement log display formatting
- Color-code by log level (INFO=blue, WARNING=yellow, ERROR=red)
- Format timestamps nicely
- Display context as JSON or formatted text
- Auto-scroll to bottom on new logs
- [ ] T027 [US2] Add log refresh functionality
- Add refresh button in modal
- Poll for new logs every 5 seconds while modal open
- Show "new logs available" indicator
### Testing
- [ ] T028 [US2] Test log retrieval
- Create task with various log entries
- Verify logs are returned correctly
- Verify log context is preserved
- Test with large log files
- [ ] T029 [US2] Test log viewer UI
- Open logs for completed task
- Open logs for running task
- Verify formatting and readability
- Test refresh functionality
---
## Phase 5: User Story 3 - Interactive Password Resolution (P1)
**Goal**: As a user, I want the system to detect when a migration fails due to a missing database password and allow me to provide it interactively.
**Independent Test**: Trigger a migration that requires a DB password and verify the UI prompts for the password instead of just failing.
### Backend Implementation
- [ ] T030 [US3] Implement password error detection in MigrationPlugin
- Add error pattern matching for Superset 422 errors
- Extract database name from error message
- Create DatabasePasswordRequest object
- Transition task to AWAITING_INPUT state
- [ ] T031 [US3] Implement task resumption with passwords
- Add validation for password format
- Inject passwords into migration context
- Resume task execution from failure point
- Handle multiple database passwords
- [ ] T032 [US3] Add task persistence for AWAITING_INPUT state
- Persist task context and input_request
- Load persisted tasks on backend restart
- Clear persisted data on task completion
- Implement retention policy
### Frontend Implementation
- [ ] T033 [US3] Implement password prompt detection
- Monitor task status changes
- Detect AWAITING_INPUT state
- Show notification to user
- Update task list to show "Requires Input" indicator
- [ ] T034 [US3] Wire PasswordPrompt to task resumption
- Connect form submission to taskService.resumeTask()
- Handle success (close prompt, resume task)
- Handle failure (show error, keep prompt open)
- Support multiple database inputs
- [ ] T035 [US3] Add visual indicators for password-required tasks
- Highlight tasks needing input in task list
- Add badge or icon
- Show count of pending inputs
### Testing
- [ ] T036 [US3] Test password error detection
- Mock Superset password error
- Verify error is detected
- Verify task transitions to AWAITING_INPUT
- Verify DatabasePasswordRequest is created
- [ ] T037 [US3] Test password resumption
- Provide correct password
- Verify task resumes
- Verify task completes successfully
- Test with incorrect password (should prompt again)
- [ ] T038 [US3] Test persistence across restarts
- Create AWAITING_INPUT task
- Restart backend
- Verify task is loaded
- Verify password prompt still works
- [ ] T039 [US3] Test multiple database passwords
- Create migration requiring 2+ databases
- Verify all databases listed in prompt
- Verify all passwords submitted
- Verify task resumes with all credentials
---
## Phase 6: Polish & Cross-Cutting Concerns
### Integration & E2E
- [ ] T040 [P] Integrate all components on migration page
- Add TaskHistory to migration page
- Add password prompt handling
- Ensure WebSocket connections work
- Test complete user flow
- [ ] T041 [P] Add loading states and error boundaries
- Show loading spinners during API calls
- Handle API errors gracefully
- Show user-friendly error messages
- Add retry mechanisms
### Configuration & Security
- [ ] T042 [P] Add configuration options
- Task retention days (default: 30)
- Task retention limit (default: 100)
- Pagination limits (default: 10, max: 50)
- Password complexity requirements
- [ ] T043 [P] Security review
- Verify passwords are not logged
- Verify passwords are not stored permanently
- Verify input validation on all endpoints
- Check for SQL injection vulnerabilities
### Documentation
- [ ] T044 [P] Update API documentation
- Add new endpoints to OpenAPI spec
- Update API contract examples
- Document WebSocket channels
- [ ] T045 [P] Update quickstart guide
- Add task history section
- Add log viewing section
- Add password prompt section
- Add troubleshooting tips
### Testing & Quality
- [ ] T046 [P] Write unit tests for backend
- Test TaskManager extensions
- Test MigrationPlugin error detection
- Test API endpoints
- Test password validation
- [ ] T047 [P] Write unit tests for frontend
- Test taskService functions
- Test TaskHistory component
- Test TaskLogViewer component
- Test PasswordPrompt component
- [ ] T048 [P] Write integration tests
- Test complete password flow
- Test task persistence
- Test WebSocket updates
- Test error recovery
- [ ] T049 [P] Run full test suite
- Execute pytest for backend
- Execute frontend tests
- Fix any failing tests
- Verify all acceptance criteria met
- [ ] T050 [P] Final validation
- Verify all user stories work independently
- Verify all acceptance scenarios pass
- Check performance (pagination, real-time updates)
- Review code quality and security
---
## Implementation Strategy
### MVP Approach (Recommended)
**Focus on User Story 1 (P1) first**:
1. Complete Phase 1 (Setup)
2. Complete Phase 2 (Foundational) - Backend only
3. Complete Phase 3 (US1) - Task History
4. **MVP Complete**: Users can view task list and status
**Then add User Story 3 (P1)**:
5. Complete Phase 5 (US3) - Password Resolution
6. **Enhanced MVP**: Users can handle password errors
**Finally add User Story 2 (P2)**:
7. Complete Phase 4 (US2) - Log Inspection
8. **Full Feature**: Complete UI improvements
### Parallel Development
**Backend Team**:
- T004-T009 (Core extensions)
- T010-T011 (API routes)
- T016-T018 (US1 backend)
- T024 (US2 backend)
- T030-T032 (US3 backend)
**Frontend Team**:
- T012 (Services)
- T013-T015 (Components)
- T019-T021 (US1 frontend)
- T025-T027 (US2 frontend)
- T033-T035 (US3 frontend)
**Testing Team**:
- T022-T023 (US1 tests)
- T028-T029 (US2 tests)
- T036-T039 (US3 tests)
- T046-T050 (Integration & final)
### Risk Mitigation
1. **Superset API Changes**: Pattern matching may need updates if Superset changes error format
- Mitigation: Make pattern matching configurable
2. **WebSocket Scalability**: Real-time updates may impact performance with many users
- Mitigation: Use polling fallback, implement rate limiting
3. **Password Security**: Handling sensitive data requires careful implementation
- Mitigation: Never log passwords, clear from memory after use, use secure transport
4. **Task Persistence**: SQLite may not scale for high-volume task history
- Mitigation: Configurable retention, consider migration to full database later
---
## Success Criteria Validation
### User Story 1 - Task History and Status
- [ ] SC-001: Users can view status of last 10 migration tasks on migration page
- [ ] Real-time status updates work
- [ ] Task list shows ID, status, start time, actions
### User Story 2 - Task Log Inspection
- [ ] SC-002: Users can access full log in less than 2 clicks
- [ ] Log viewer shows timestamped messages
- [ ] Modal/panel works correctly
### User Story 3 - Interactive Password Resolution
- [ ] SC-003: 100% of "Missing Password" errors caught and presented as prompts
- [ ] SC-004: Users can resume blocked migration by providing password
- [ ] Task state transitions work correctly
- [ ] Multiple database passwords supported
### Cross-Cutting Requirements
- [ ] All API endpoints follow contract specifications
- [ ] All components follow existing patterns
- [ ] Security requirements met
- [ ] Performance acceptable (pagination, real-time updates)
- [ ] Configuration options available
- [ ] Documentation complete
---
## Task Summary
**Total Tasks**: 50
**Setup Phase**: 3 tasks
**Foundational Phase**: 12 tasks
**US1 Phase**: 8 tasks
**US2 Phase**: 6 tasks
**US3 Phase**: 10 tasks
**Polish Phase**: 11 tasks
**Parallel Opportunities**: 15+ tasks can be developed in parallel within their phases
**MVP Scope**: Tasks 1-23 (Setup, Foundational, US1) - ~23 tasks
**Full Feature**: All 50 tasks
---
## Next Steps
1. **Review this tasks.md** with team leads
2. **Assign tasks** to backend/frontend developers
3. **Start Phase 1** immediately (Setup)
4. **Schedule daily standups** to track progress
5. **Use this document** as the single source of truth for implementation
**Ready for Implementation**: ✅ All design artifacts complete, tasks generated, dependencies mapped.