feat: Initial commit - Task Reporter incident response system
Complete implementation of the production line incident response system (生產線異常即時反應系統) including: Backend (FastAPI): - User authentication with AD integration and session management - Chat room management (create, list, update, members, roles) - Real-time messaging via WebSocket (typing indicators, reactions) - File storage with MinIO (upload, download, image preview) Frontend (React + Vite): - Authentication flow with token management - Room list with filtering, search, and pagination - Real-time chat interface with WebSocket - File upload with drag-and-drop and image preview - Member management and room settings - Breadcrumb navigation - 53 unit tests (Vitest) Specifications: - authentication: AD auth, sessions, JWT tokens - chat-room: rooms, members, templates - realtime-messaging: WebSocket, messages, reactions - file-storage: MinIO integration, file management - frontend-core: React SPA structure 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
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# Implementation Tasks
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## 1. Database Schema
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- [ ] 1.1 Create `messages` table with columns:
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- [ ] message_id (UUID, PK)
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- [ ] room_id (FK to incident_rooms)
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- [ ] sender_id (VARCHAR, user email)
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- [ ] content (TEXT)
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- [ ] message_type (ENUM: text, image_ref, file_ref, system, incident_data)
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- [ ] metadata (JSON, for structured data and mentions)
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- [ ] created_at (TIMESTAMP)
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- [ ] edited_at (TIMESTAMP, nullable)
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- [ ] deleted_at (TIMESTAMP, nullable for soft delete)
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- [ ] sequence_number (BIGSERIAL for ordering)
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- [ ] 1.2 Create `message_reactions` table:
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- [ ] reaction_id (SERIAL, PK)
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- [ ] message_id (FK to messages)
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- [ ] user_id (VARCHAR)
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- [ ] emoji (VARCHAR(10))
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- [ ] created_at (TIMESTAMP)
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- [ ] UNIQUE constraint on (message_id, user_id, emoji)
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- [ ] 1.3 Create `message_edit_history` table:
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- [ ] edit_id (SERIAL, PK)
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- [ ] message_id (FK to messages)
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- [ ] original_content (TEXT)
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- [ ] edited_by (VARCHAR)
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- [ ] edited_at (TIMESTAMP)
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- [ ] 1.4 Create indexes:
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- [ ] Index on messages(room_id, created_at DESC)
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- [ ] Index on messages(room_id, sequence_number)
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- [ ] Full-text index on messages(content) for search
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- [ ] Index on message_reactions(message_id)
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- [ ] 1.5 Create database migration using Alembic
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## 2. WebSocket Infrastructure
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### 2.1 Connection Management
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- [ ] 2.1.1 Create `app/modules/realtime/` module structure:
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- [ ] `__init__.py`
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- [ ] `websocket_manager.py` (connection pool management)
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- [ ] `models.py` (message models)
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- [ ] `schemas.py` (WebSocket message schemas)
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- [ ] `handlers.py` (message type handlers)
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- [ ] `router.py` (WebSocket endpoint)
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- [ ] 2.1.2 Implement `WebSocketManager` class:
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- [ ] `connect(websocket, room_id, user_id)` - Add connection to pool
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- [ ] `disconnect(websocket, room_id, user_id)` - Remove and cleanup
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- [ ] `broadcast_to_room(room_id, message)` - Send to all in room
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- [ ] `send_personal(user_id, message)` - Send to specific user
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- [ ] `get_room_connections(room_id)` - List active connections
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- [ ] 2.1.3 Implement connection authentication:
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- [ ] Extract JWT token from WebSocket headers or query params
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- [ ] Validate token using existing auth module
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- [ ] Check room membership before allowing connection
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- [ ] Reject unauthorized connections
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### 2.2 WebSocket Endpoint
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- [ ] 2.2.1 Create WebSocket route `/ws/{room_id}`:
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- [ ] Accept WebSocket connection
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- [ ] Authenticate user
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- [ ] Add to connection pool
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- [ ] Listen for incoming messages
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- [ ] Handle disconnection gracefully
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- [ ] 2.2.2 Implement reconnection handling:
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- [ ] Track last sequence number per connection
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- [ ] Support resume from sequence number
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- [ ] Queue messages during brief disconnections
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- [ ] 2.2.3 Implement heartbeat/ping-pong:
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- [ ] Send ping every 30 seconds
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- [ ] Wait for pong response
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- [ ] Terminate stale connections
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## 3. Message Handling
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### 3.1 Message Models and Schemas
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- [ ] 3.1.1 Create SQLAlchemy models:
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- [ ] `Message` model
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- [ ] `MessageReaction` model
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- [ ] `MessageEditHistory` model
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- [ ] 3.1.2 Create Pydantic schemas:
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- [ ] `WebSocketMessage` (incoming)
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- [ ] `MessageBroadcast` (outgoing)
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- [ ] `MessageCreate` (for database)
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- [ ] `MessageResponse` (for REST API)
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- [ ] `ReactionRequest/Response`
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- [ ] 3.1.3 Define message type enums:
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- [ ] MessageType (text, image_ref, file_ref, system, incident_data)
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- [ ] SystemEventType (user_joined, user_left, status_changed, etc.)
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### 3.2 Message Processing
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- [ ] 3.2.1 Create message handlers for each type:
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- [ ] `handle_text_message()` - Process plain text
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- [ ] `handle_image_reference()` - Validate and store image refs
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- [ ] `handle_file_reference()` - Validate and store file refs
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- [ ] `handle_incident_data()` - Process structured data
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- [ ] `handle_system_message()` - Broadcast system events
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- [ ] 3.2.2 Implement mention parsing:
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- [ ] Extract @mentions from content
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- [ ] Validate mentioned users exist
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- [ ] Store mentions in metadata
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- [ ] 3.2.3 Implement message validation:
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- [ ] Content length limits (10KB text, 100KB structured)
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- [ ] Rate limiting (10 messages/second per user)
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- [ ] Spam detection
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- [ ] XSS prevention (sanitize HTML)
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### 3.3 Message Operations
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- [ ] 3.3.1 Implement message editing:
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- [ ] Validate edit permission (own message, within 15 mins)
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- [ ] Store original in edit history
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- [ ] Update message content
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- [ ] Broadcast edit event
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- [ ] 3.3.2 Implement message deletion:
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- [ ] Soft delete (set deleted_at)
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- [ ] Validate delete permission
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- [ ] Broadcast deletion event
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- [ ] 3.3.3 Implement reactions:
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- [ ] Add/remove reactions
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- [ ] Aggregate reaction counts
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- [ ] Broadcast reaction updates
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## 4. Message Service Layer
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### 4.1 Message Service
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- [ ] 4.1.1 Create `services/message_service.py`:
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- [ ] `create_message(db, room_id, sender_id, content, message_type)`
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- [ ] `get_messages(db, room_id, limit, before_timestamp)`
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- [ ] `edit_message(db, message_id, user_id, new_content)`
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- [ ] `delete_message(db, message_id, user_id)`
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- [ ] `search_messages(db, room_id, query, user_id)`
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- [ ] 4.1.2 Implement message persistence:
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- [ ] Auto-assign sequence numbers
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- [ ] Handle concurrent writes
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- [ ] Maintain message ordering
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- [ ] 4.1.3 Implement message retrieval:
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- [ ] Paginated history loading
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- [ ] Filter by message type
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- [ ] Include reaction aggregates
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### 4.2 Reaction Service
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- [ ] 4.2.1 Create `services/reaction_service.py`:
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- [ ] `add_reaction(db, message_id, user_id, emoji)`
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- [ ] `remove_reaction(db, message_id, user_id, emoji)`
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- [ ] `get_message_reactions(db, message_id)`
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- [ ] `get_reaction_counts(db, message_id)`
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## 5. REST API Endpoints
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### 5.1 Message Endpoints
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- [ ] 5.1.1 Implement message REST endpoints:
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- [ ] `GET /api/rooms/{room_id}/messages` - Get message history
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- [ ] `GET /api/rooms/{room_id}/messages/{message_id}` - Get single message
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- [ ] `POST /api/rooms/{room_id}/messages` - Send message (alternative to WS)
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- [ ] `PATCH /api/messages/{message_id}` - Edit message
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- [ ] `DELETE /api/messages/{message_id}` - Delete message
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- [ ] 5.1.2 Implement search endpoint:
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- [ ] `GET /api/rooms/{room_id}/messages/search?q={query}`
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- [ ] 5.1.3 Implement reaction endpoints:
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- [ ] `POST /api/messages/{message_id}/reactions` - Add reaction
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- [ ] `DELETE /api/messages/{message_id}/reactions/{emoji}` - Remove reaction
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### 5.2 Presence Endpoints
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- [ ] 5.2.1 Create presence tracking:
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- [ ] `GET /api/rooms/{room_id}/online` - Get online users
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- [ ] `GET /api/rooms/{room_id}/typing` - Get typing users
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## 6. Broadcasting System
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### 6.1 Event Broadcasting
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- [ ] 6.1.1 Create broadcast service:
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- [ ] Room-level broadcasts (all members)
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- [ ] User-level broadcasts (specific user)
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- [ ] System-wide broadcasts (all connections)
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- [ ] 6.1.2 Implement event types:
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- [ ] Message events (new, edit, delete)
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- [ ] User events (joined, left, typing)
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- [ ] Room events (status changed, member added)
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- [ ] 6.1.3 Create event queue:
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- [ ] Queue events during processing
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- [ ] Batch broadcasts for efficiency
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- [ ] Handle failed deliveries
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### 6.2 Typing Indicators
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- [ ] 6.2.1 Implement typing state management:
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- [ ] Track typing users per room
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- [ ] Auto-expire after 3 seconds
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- [ ] Broadcast typing events
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- [ ] 6.2.2 Debounce typing events:
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- [ ] Limit typing event frequency
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- [ ] Aggregate multiple typing users
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## 7. Client Helpers
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### 7.1 Connection Recovery
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- [ ] 7.1.1 Implement reconnection logic:
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- [ ] Exponential backoff (1s, 2s, 4s, 8s, max 30s)
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- [ ] Store last sequence number
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- [ ] Request missed messages on reconnect
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- [ ] 7.1.2 Implement offline queue:
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- [ ] Queue messages while disconnected
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- [ ] Send queued messages on reconnect
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- [ ] Handle conflicts
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### 7.2 Client SDK
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- [ ] 7.2.1 Create Python client example:
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- [ ] WebSocket connection wrapper
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- [ ] Auto-reconnection
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- [ ] Message sending/receiving
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- [ ] 7.2.2 Create JavaScript client example:
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- [ ] WebSocket wrapper class
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- [ ] React hooks for messages
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- [ ] TypeScript types
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## 8. Testing
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### 8.1 Unit Tests
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- [ ] 8.1.1 Test message service:
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- [ ] Message creation with validation
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- [ ] Message ordering
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- [ ] Edit/delete permissions
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- [ ] Reaction operations
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- [ ] 8.1.2 Test WebSocket manager:
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- [ ] Connection pooling
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- [ ] Broadcasting logic
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- [ ] Disconnection handling
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### 8.2 Integration Tests
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- [ ] 8.2.1 Test WebSocket flow:
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- [ ] Connect → Send → Receive → Disconnect
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- [ ] Multi-user message exchange
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- [ ] Reconnection with message recovery
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- [ ] 8.2.2 Test REST endpoints:
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- [ ] Message history retrieval
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- [ ] Search functionality
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- [ ] Permission enforcement
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### 8.3 Performance Tests
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- [ ] 8.3.1 Load testing:
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- [ ] 100+ concurrent WebSocket connections
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- [ ] 1000+ messages/minute throughput
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- [ ] Message broadcast latency < 100ms
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- [ ] 8.3.2 Stress testing:
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- [ ] Connection/disconnection cycling
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- [ ] Large message payloads
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- [ ] Database query performance
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## 9. Security
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### 9.1 Authentication & Authorization
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- [ ] 9.1.1 Implement WebSocket authentication:
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- [ ] JWT token validation
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- [ ] Room membership verification
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- [ ] Permission checks for operations
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- [ ] 9.1.2 Implement rate limiting:
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- [ ] Per-user message rate limits
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- [ ] Connection attempt limits
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- [ ] Global room limits
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### 9.2 Input Validation
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- [ ] 9.2.1 Sanitize message content:
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- [ ] XSS prevention
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- [ ] SQL injection prevention
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- [ ] Script injection prevention
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- [ ] 9.2.2 Validate message size:
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- [ ] Enforce content length limits
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- [ ] Validate JSON structure
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- [ ] Reject malformed messages
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## 10. Monitoring & Logging
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### 10.1 Metrics
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- [ ] 10.1.1 Track WebSocket metrics:
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- [ ] Active connections count
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- [ ] Messages per second
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- [ ] Broadcast latency
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- [ ] Error rates
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- [ ] 10.1.2 Track message metrics:
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- [ ] Messages per room
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- [ ] Message types distribution
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- [ ] Edit/delete rates
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### 10.2 Logging
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- [ ] 10.2.1 Log WebSocket events:
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- [ ] Connection/disconnection
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- [ ] Authentication failures
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- [ ] Message errors
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- [ ] 10.2.2 Log message operations:
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- [ ] Message sent/edited/deleted
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- [ ] Search queries
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- [ ] Permission denials
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## 11. Documentation
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### 11.1 API Documentation
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- [ ] 11.1.1 Document WebSocket protocol:
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- [ ] Connection process
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- [ ] Message formats
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- [ ] Event types
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- [ ] 11.1.2 Document REST endpoints:
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- [ ] Request/response formats
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- [ ] Error codes
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- [ ] Rate limits
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### 11.2 Integration Guide
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- [ ] 11.2.1 Client integration examples:
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- [ ] Python client code
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- [ ] JavaScript/React examples
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- [ ] Error handling patterns
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- [ ] 11.2.2 Server deployment guide:
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- [ ] WebSocket configuration
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- [ ] Nginx proxy setup
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- [ ] Scaling considerations
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