CLAUDE: Refactor backend CLAUDE.md files for conciseness
Major reduction in CLAUDE.md file sizes to follow concise documentation standard: | File | Before | After | Reduction | |------|--------|-------|-----------| | backend/CLAUDE.md | 2,467 | 123 | 95% | | models/CLAUDE.md | 1,586 | 102 | 94% | | websocket/CLAUDE.md | 2,094 | 119 | 94% | | config/CLAUDE.md | 1,017 | 126 | 88% | | database/CLAUDE.md | 946 | 130 | 86% | | api/CLAUDE.md | 906 | 140 | 85% | Total: 9,016 -> 740 lines (92% reduction) All files now under 150 lines with: - Essential patterns and usage - Cross-references to related docs - Quick-start examples - Updated timestamps 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
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# Backend API Layer - REST Endpoints
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# API Module - REST Endpoints
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## Overview
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## Purpose
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The `app/api/` directory contains REST API endpoints for the Paper Dynasty game backend. This layer provides traditional HTTP request/response endpoints for operations like authentication, game creation, health checks, and data retrieval.
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REST API endpoints using FastAPI. Handles authentication, health checks, and supplementary game operations not suited for WebSocket (e.g., initial page loads, file uploads).
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**Architecture Note**: Most real-time gameplay happens via WebSocket (see `app/websocket/`). REST API is primarily for:
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- Authentication & authorization
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- Game lifecycle (create, list, retrieve)
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- Health monitoring
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- Data queries that don't require real-time updates
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## Directory Structure
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## Structure
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```
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app/api/
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├── __init__.py # Empty package marker
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├── routes/ # API route modules
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│ ├── __init__.py # Empty package marker
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│ ├── health.py # Health check endpoints (✅ complete)
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│ ├── auth.py # Authentication endpoints (stub)
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│ └── games.py # Game CRUD endpoints (stub)
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└── CLAUDE.md # This file
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├── __init__.py # Package marker
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├── dependencies.py # FastAPI dependencies (auth, db session)
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└── routes/
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├── health.py # Health check endpoints
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├── auth.py # Discord OAuth flow
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└── games.py # Game CRUD operations
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```
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**Note**: No `dependencies.py` file yet. Common dependencies (auth, DB sessions) will be added as needed during Phase 2+ implementation.
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## Current Implementation Status
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### ✅ Fully Implemented
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#### Health Endpoints (`routes/health.py`)
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**Purpose**: Service health monitoring for deployment and operations
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**Endpoints**:
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1. **GET `/api/health`** - Application health check
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- Returns: Service status, timestamp, environment, version
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- Use: Load balancer health probes, monitoring systems
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- Response time: < 10ms
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2. **GET `/api/health/db`** - Database connectivity check
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- Returns: Database connection status
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- Use: Verify database availability
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- Response time: < 50ms
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- Graceful error handling (returns unhealthy status instead of 500)
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**Example Responses**:
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```json
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// GET /api/health
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{
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"status": "healthy",
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"timestamp": "2025-10-31T14:23:45.123456+00:00",
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"environment": "development",
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"version": "1.0.0"
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}
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// GET /api/health/db (success)
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{
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"status": "healthy",
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"database": "connected",
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"timestamp": "2025-10-31T14:23:45.123456+00:00"
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}
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// GET /api/health/db (failure)
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{
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"status": "unhealthy",
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"database": "disconnected",
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"error": "connection refused",
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"timestamp": "2025-10-31T14:23:45.123456+00:00"
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}
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```
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### 🟡 Stub Implementation (Phase 1)
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#### Authentication Endpoints (`routes/auth.py`)
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**Purpose**: User authentication via Discord OAuth (planned for Phase 1, currently stub)
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**Endpoints**:
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1. **POST `/api/auth/token`** - Create JWT token
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- Request: `TokenRequest` (user_id, username, discord_id)
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- Response: `TokenResponse` (access_token, token_type)
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- Current: Directly creates token from provided data (no OAuth yet)
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- TODO: Implement full Discord OAuth flow
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2. **GET `/api/auth/verify`** - Verify authentication status
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- Response: Stub acknowledgment
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- TODO: Implement token verification with user context
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**TODO Items**:
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- [ ] Discord OAuth callback handler
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- [ ] State parameter validation
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- [ ] Token refresh endpoint
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- [ ] User session management
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- [ ] Authentication middleware/dependency
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#### Game Endpoints (`routes/games.py`)
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**Purpose**: Game lifecycle management (planned for Phase 2+, currently stub)
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**Endpoints**:
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1. **GET `/api/games/`** - List all games
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- Response: List of `GameListItem` (game_id, league_id, status, teams)
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- TODO: Implement with database query, pagination, filters
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2. **GET `/api/games/{game_id}`** - Get game details
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- Response: Full game state and metadata
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- TODO: Load from database, include plays, lineups, current state
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3. **POST `/api/games/`** - Create new game
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- Request: Game creation parameters (league, teams, settings)
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- Response: Created game details
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- TODO: Create game in DB, initialize state, return game_id
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**TODO Items**:
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- [ ] Game creation with validation
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- [ ] Game listing with filters (by league, status, user)
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- [ ] Game detail retrieval with related data
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- [ ] Game deletion/cancellation
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- [ ] Game history and statistics
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## FastAPI Patterns Used
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### 1. APIRouter Pattern
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Each route module creates its own `APIRouter` instance:
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## Routes
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### Health (`/health`)
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```python
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from fastapi import APIRouter
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router = APIRouter()
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@router.get("/endpoint")
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async def handler():
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...
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GET /health # Basic health check
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GET /health/ready # Ready check with DB connectivity
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```
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Routers are registered in `app/main.py`:
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### Auth (`/auth`)
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```python
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from app.api.routes import health, auth, games
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app.include_router(health.router, prefix="/api", tags=["health"])
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app.include_router(auth.router, prefix="/api/auth", tags=["auth"])
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app.include_router(games.router, prefix="/api/games", tags=["games"])
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GET /auth/discord # Initiate OAuth flow
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GET /auth/discord/callback # OAuth callback, returns JWT
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POST /auth/refresh # Refresh JWT token
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```
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**Conventions**:
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- Each module exports a `router` variable
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- Prefix and tags applied during registration in main.py
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- Tags group endpoints in Swagger UI docs
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### Games (`/games`)
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```python
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POST /games # Create new game
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GET /games # List user's games
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GET /games/{id} # Get game details
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GET /games/{id}/lineup # Get game lineup
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```
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### 2. Pydantic Request/Response Models
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## Dependencies
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Use Pydantic models for type safety and validation:
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### Authentication
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```python
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from app.api.dependencies import get_current_user
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@router.get("/games")
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async def list_games(user: User = Depends(get_current_user)):
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# user is authenticated
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```
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### Database Session
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```python
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from app.api.dependencies import get_db
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@router.post("/games")
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async def create_game(db: AsyncSession = Depends(get_db)):
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# Use db for operations
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```
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## FastAPI Patterns
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### Request Validation
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```python
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from pydantic import BaseModel
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class TokenRequest(BaseModel):
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"""Request model for token creation"""
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user_id: str
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username: str
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discord_id: str
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class CreateGameRequest(BaseModel):
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league_id: str
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home_team_id: int
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away_team_id: int
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class TokenResponse(BaseModel):
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"""Response model for token creation"""
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access_token: str
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token_type: str = "bearer"
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@router.post("/games")
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async def create_game(request: CreateGameRequest):
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# request is validated
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```
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@router.post("/token", response_model=TokenResponse)
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async def create_auth_token(request: TokenRequest):
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# FastAPI automatically validates request body against TokenRequest
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# and serializes return value according to TokenResponse
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### Response Model
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```python
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class GameResponse(BaseModel):
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id: UUID
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status: str
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home_score: int
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away_score: int
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@router.get("/games/{id}", response_model=GameResponse)
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async def get_game(id: UUID):
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...
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```
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**Benefits**:
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- Automatic request validation with clear error messages
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- Automatic response serialization
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- OpenAPI schema generation for docs
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- Type hints for IDE support
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### 3. Async Handlers
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All route handlers use `async def`:
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```python
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@router.get("/health/db")
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async def database_health():
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# Can use await for DB queries, external APIs, etc.
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async with engine.connect() as conn:
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await conn.execute(text("SELECT 1"))
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...
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```
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**Why Async**:
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- Non-blocking I/O operations (database, external APIs)
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- Better concurrency for high-traffic endpoints
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- Consistent with WebSocket handlers
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- Required for async database operations (asyncpg)
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### 4. Logging Pattern
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Module-level logger with descriptive name:
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```python
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import logging
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logger = logging.getLogger(f'{__name__}.health')
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@router.get("/endpoint")
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async def handler():
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logger.info("Endpoint called")
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logger.error(f"Error occurred: {error}", exc_info=True)
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```
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**Logging Levels**:
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- `DEBUG`: Detailed diagnostic information
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- `INFO`: Normal operation events (endpoint calls, state changes)
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- `WARNING`: Unusual but handled situations
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- `ERROR`: Error conditions that need attention
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- `CRITICAL`: Severe errors requiring immediate action
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### 5. Error Handling
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Use FastAPI's HTTPException for error responses:
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### Error Handling
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```python
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from fastapi import HTTPException
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@router.post("/endpoint")
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async def handler():
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try:
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# operation
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return result
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except ValidationError as e:
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logger.error(f"Validation failed: {e}")
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raise HTTPException(status_code=400, detail="Invalid request data")
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except Exception as e:
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logger.error(f"Unexpected error: {e}", exc_info=True)
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raise HTTPException(status_code=500, detail="Internal server error")
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```
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**Status Codes**:
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- 200: Success
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- 201: Created
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- 400: Bad request (validation error)
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- 401: Unauthorized (missing/invalid token)
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- 403: Forbidden (valid token, insufficient permissions)
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- 404: Not found
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- 500: Internal server error
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### 6. Settings Injection
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Use `get_settings()` for configuration:
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```python
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from app.config import get_settings
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settings = get_settings()
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@router.get("/endpoint")
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async def handler():
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api_url = settings.sba_api_url
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...
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```
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**Available Settings**:
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- `app_env`: "development", "staging", "production"
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- `debug`: Enable debug mode
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- `database_url`: PostgreSQL connection string
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- `secret_key`: JWT signing key
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- `discord_client_id`, `discord_client_secret`: OAuth credentials
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- `sba_api_url`, `pd_api_url`: League API endpoints
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- `cors_origins`: Allowed frontend origins
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## Integration Points
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### With Other Backend Components
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#### Database Layer (`app/database/`)
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```python
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from app.database.session import get_session
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from app.database.operations import DatabaseOperations
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@router.get("/games/{game_id}")
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async def get_game(game_id: str):
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db_ops = DatabaseOperations()
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game_data = await db_ops.load_game_state(game_id)
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return game_data
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```
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#### Models (`app/models/`)
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```python
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from app.models import GameState
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from app.models.db_models import Game
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@router.post("/games/")
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async def create_game(request: CreateGameRequest):
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# Use Pydantic models for validation
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# Use SQLAlchemy models for database operations
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...
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```
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#### Authentication (`app/utils/auth.py`)
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```python
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from app.utils.auth import create_token, verify_token
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@router.post("/auth/token")
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async def create_auth_token(request: TokenRequest):
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token = create_token(user_data)
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return TokenResponse(access_token=token)
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```
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#### State Manager (`app/core/state_manager.py`)
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```python
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from app.core.state_manager import state_manager
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@router.get("/games/{game_id}")
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async def get_game(game_id: str):
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# Check in-memory state first (fast)
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state = state_manager.get_state(game_id)
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if not state:
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# Fall back to database
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state = await state_manager.recover_game(game_id)
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return state
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```
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### With Frontend
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Frontend applications make HTTP requests to these endpoints:
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```typescript
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// Example frontend code (Vue/Nuxt)
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const api = axios.create({
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baseURL: 'http://localhost:8000/api',
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headers: {
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'Authorization': `Bearer ${token}`
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}
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});
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// Health check
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const health = await api.get('/health');
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// Create game
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const game = await api.post('/games/', {
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league_id: 'sba',
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home_team_id: 1,
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away_team_id: 2
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});
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// List games
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const games = await api.get('/games/');
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if not game:
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raise HTTPException(status_code=404, detail="Game not found")
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```
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## Common Tasks
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### Adding a New Endpoint
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1. **Choose appropriate route module** (or create new one)
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```bash
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# If creating new module
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touch app/api/routes/teams.py
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```
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2. **Define Pydantic models** for request/response
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```python
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from pydantic import BaseModel
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class CreateTeamRequest(BaseModel):
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name: str
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league_id: str
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owner_id: str
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class TeamResponse(BaseModel):
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id: int
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name: str
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league_id: str
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created_at: str
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```
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3. **Create route handler**
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```python
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import logging
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from fastapi import APIRouter, HTTPException
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from app.database.operations import DatabaseOperations
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logger = logging.getLogger(f'{__name__}.teams')
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router = APIRouter()
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@router.post("/", response_model=TeamResponse)
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async def create_team(request: CreateTeamRequest):
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"""Create a new team"""
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logger.info(f"Creating team: {request.name}")
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try:
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db_ops = DatabaseOperations()
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team = await db_ops.create_team(
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name=request.name,
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league_id=request.league_id,
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owner_id=request.owner_id
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)
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return TeamResponse(**team)
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except Exception as e:
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logger.error(f"Failed to create team: {e}", exc_info=True)
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raise HTTPException(status_code=500, detail="Failed to create team")
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```
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4. **Register router in main.py**
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```python
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from app.api.routes import teams
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app.include_router(teams.router, prefix="/api/teams", tags=["teams"])
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```
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5. **Test the endpoint**
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||||
```bash
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# Start server
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uv run python -m app.main
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||||
# Test with curl
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||||
curl -X POST http://localhost:8000/api/teams/ \
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-H "Content-Type: application/json" \
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-d '{"name": "Test Team", "league_id": "sba", "owner_id": "user123"}'
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||||
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||||
# Or use Swagger UI
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||||
# http://localhost:8000/docs
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```
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||||
|
||||
### Adding Authentication Dependency
|
||||
|
||||
When authentication is implemented, add a dependency for protected endpoints:
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||||
### Add New Endpoint
|
||||
1. Create route in `app/api/routes/`
|
||||
2. Define Pydantic request/response models
|
||||
3. Add dependencies (auth, db)
|
||||
4. Register router in `app/main.py`
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||||
|
||||
### Protected Route
|
||||
```python
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||||
from fastapi import Depends, HTTPException, Header
|
||||
from app.utils.auth import verify_token
|
||||
|
||||
async def get_current_user(authorization: str = Header(...)):
|
||||
"""Extract and verify user from JWT token"""
|
||||
try:
|
||||
scheme, token = authorization.split()
|
||||
if scheme.lower() != 'bearer':
|
||||
raise HTTPException(status_code=401, detail="Invalid auth scheme")
|
||||
|
||||
payload = verify_token(token)
|
||||
return payload
|
||||
except Exception as e:
|
||||
raise HTTPException(status_code=401, detail="Invalid token")
|
||||
|
||||
@router.post("/games/")
|
||||
async def create_game(
|
||||
request: CreateGameRequest,
|
||||
user = Depends(get_current_user) # Automatically extracts and validates token
|
||||
@router.get("/protected")
|
||||
async def protected_route(
|
||||
user: User = Depends(get_current_user)
|
||||
):
|
||||
# user contains decoded JWT payload
|
||||
owner_id = user['user_id']
|
||||
...
|
||||
return {"user_id": user.id}
|
||||
```
|
||||
|
||||
### Adding Database Operations
|
||||
|
||||
For endpoints that need database access:
|
||||
## Registration
|
||||
|
||||
Routes are registered in `app/main.py`:
|
||||
```python
|
||||
from app.database.operations import DatabaseOperations
|
||||
from app.database.session import get_session
|
||||
from app.api.routes import health, auth, games
|
||||
|
||||
@router.get("/games/{game_id}")
|
||||
async def get_game(game_id: str):
|
||||
db_ops = DatabaseOperations()
|
||||
|
||||
# Load game with all related data
|
||||
game_data = await db_ops.load_game_state(game_id)
|
||||
|
||||
if not game_data:
|
||||
raise HTTPException(status_code=404, detail="Game not found")
|
||||
|
||||
return game_data
|
||||
app.include_router(health.router, prefix="/health")
|
||||
app.include_router(auth.router, prefix="/auth")
|
||||
app.include_router(games.router, prefix="/games")
|
||||
```
|
||||
|
||||
### Adding Request Validation
|
||||
## API Docs
|
||||
|
||||
Pydantic provides powerful validation:
|
||||
|
||||
```python
|
||||
from pydantic import BaseModel, Field, validator
|
||||
|
||||
class CreateGameRequest(BaseModel):
|
||||
league_id: str = Field(..., regex="^(sba|pd)$")
|
||||
home_team_id: int = Field(..., gt=0)
|
||||
away_team_id: int = Field(..., gt=0)
|
||||
game_mode: str = Field(default="friendly", regex="^(ranked|friendly|practice)$")
|
||||
|
||||
@validator('away_team_id')
|
||||
def teams_must_differ(cls, v, values):
|
||||
if 'home_team_id' in values and v == values['home_team_id']:
|
||||
raise ValueError('Home and away teams must be different')
|
||||
return v
|
||||
```
|
||||
|
||||
### Adding Query Parameters
|
||||
|
||||
For list endpoints with filters:
|
||||
|
||||
```python
|
||||
from typing import Optional
|
||||
|
||||
@router.get("/games/")
|
||||
async def list_games(
|
||||
league_id: Optional[str] = None,
|
||||
status: Optional[str] = None,
|
||||
limit: int = 50,
|
||||
offset: int = 0
|
||||
):
|
||||
"""
|
||||
List games with optional filters
|
||||
|
||||
Query params:
|
||||
- league_id: Filter by league ('sba' or 'pd')
|
||||
- status: Filter by status ('pending', 'active', 'completed')
|
||||
- limit: Number of results (default 50, max 100)
|
||||
- offset: Pagination offset (default 0)
|
||||
"""
|
||||
db_ops = DatabaseOperations()
|
||||
games = await db_ops.list_games(
|
||||
league_id=league_id,
|
||||
status=status,
|
||||
limit=min(limit, 100),
|
||||
offset=offset
|
||||
)
|
||||
return games
|
||||
```
|
||||
|
||||
## Testing
|
||||
|
||||
### Manual Testing with Swagger UI
|
||||
|
||||
FastAPI automatically generates interactive API documentation:
|
||||
|
||||
1. Start the backend server:
|
||||
```bash
|
||||
uv run python -m app.main
|
||||
```
|
||||
|
||||
2. Open Swagger UI:
|
||||
```
|
||||
http://localhost:8000/docs
|
||||
```
|
||||
|
||||
3. Features:
|
||||
- View all endpoints grouped by tags
|
||||
- See request/response schemas
|
||||
- Try out endpoints with test data
|
||||
- View response bodies and status codes
|
||||
- Copy curl commands
|
||||
|
||||
### Manual Testing with curl
|
||||
|
||||
```bash
|
||||
# Health check
|
||||
curl http://localhost:8000/api/health
|
||||
|
||||
# Database health check
|
||||
curl http://localhost:8000/api/health/db
|
||||
|
||||
# Create token (stub)
|
||||
curl -X POST http://localhost:8000/api/auth/token \
|
||||
-H "Content-Type: application/json" \
|
||||
-d '{
|
||||
"user_id": "test123",
|
||||
"username": "testuser",
|
||||
"discord_id": "123456789"
|
||||
}'
|
||||
|
||||
# List games (stub)
|
||||
curl http://localhost:8000/api/games/
|
||||
```
|
||||
|
||||
### Unit Testing
|
||||
|
||||
Create test files in `tests/unit/api/`:
|
||||
|
||||
```python
|
||||
import pytest
|
||||
from httpx import AsyncClient
|
||||
from app.main import app
|
||||
|
||||
@pytest.mark.asyncio
|
||||
async def test_health_endpoint():
|
||||
async with AsyncClient(app=app, base_url="http://test") as client:
|
||||
response = await client.get("/api/health")
|
||||
assert response.status_code == 200
|
||||
data = response.json()
|
||||
assert data["status"] == "healthy"
|
||||
assert "timestamp" in data
|
||||
assert "version" in data
|
||||
|
||||
@pytest.mark.asyncio
|
||||
async def test_create_token():
|
||||
async with AsyncClient(app=app, base_url="http://test") as client:
|
||||
response = await client.post("/api/auth/token", json={
|
||||
"user_id": "test123",
|
||||
"username": "testuser",
|
||||
"discord_id": "123456789"
|
||||
})
|
||||
assert response.status_code == 200
|
||||
data = response.json()
|
||||
assert "access_token" in data
|
||||
assert data["token_type"] == "bearer"
|
||||
```
|
||||
|
||||
### Integration Testing
|
||||
|
||||
Test with real database:
|
||||
|
||||
```python
|
||||
import pytest
|
||||
from httpx import AsyncClient
|
||||
from app.main import app
|
||||
from app.database.session import init_db
|
||||
|
||||
@pytest.mark.integration
|
||||
@pytest.mark.asyncio
|
||||
async def test_database_health_endpoint():
|
||||
await init_db()
|
||||
|
||||
async with AsyncClient(app=app, base_url="http://test") as client:
|
||||
response = await client.get("/api/health/db")
|
||||
assert response.status_code == 200
|
||||
data = response.json()
|
||||
assert data["status"] == "healthy"
|
||||
assert data["database"] == "connected"
|
||||
```
|
||||
|
||||
## Troubleshooting
|
||||
|
||||
### Issue: 422 Unprocessable Entity
|
||||
|
||||
**Cause**: Request body doesn't match Pydantic model schema
|
||||
|
||||
**Solution**:
|
||||
1. Check Swagger UI for expected schema
|
||||
2. Verify all required fields are present
|
||||
3. Check field types match (string vs int, etc.)
|
||||
4. Check for custom validators
|
||||
|
||||
**Example Error**:
|
||||
```json
|
||||
{
|
||||
"detail": [
|
||||
{
|
||||
"loc": ["body", "user_id"],
|
||||
"msg": "field required",
|
||||
"type": "value_error.missing"
|
||||
}
|
||||
]
|
||||
}
|
||||
```
|
||||
|
||||
### Issue: 401 Unauthorized
|
||||
|
||||
**Cause**: Missing or invalid authentication token
|
||||
|
||||
**Solution**:
|
||||
1. Verify token is included in Authorization header
|
||||
2. Check token format: `Bearer <token>`
|
||||
3. Verify token hasn't expired
|
||||
4. Check secret_key matches between token creation and verification
|
||||
|
||||
### Issue: 500 Internal Server Error
|
||||
|
||||
**Cause**: Unhandled exception in route handler
|
||||
|
||||
**Solution**:
|
||||
1. Check backend logs for stack trace
|
||||
2. Add try/except blocks with specific error handling
|
||||
3. Use HTTPException for expected errors
|
||||
4. Log errors with `exc_info=True` for full stack trace
|
||||
|
||||
**Example**:
|
||||
```python
|
||||
try:
|
||||
result = await some_operation()
|
||||
except ValidationError as e:
|
||||
# Expected error - return 400
|
||||
logger.warning(f"Validation failed: {e}")
|
||||
raise HTTPException(status_code=400, detail=str(e))
|
||||
except Exception as e:
|
||||
# Unexpected error - return 500 and log
|
||||
logger.error(f"Unexpected error: {e}", exc_info=True)
|
||||
raise HTTPException(status_code=500, detail="Internal server error")
|
||||
```
|
||||
|
||||
### Issue: CORS Errors in Frontend
|
||||
|
||||
**Cause**: Frontend origin not in CORS allowed origins
|
||||
|
||||
**Solution**:
|
||||
1. Check frontend URL in browser console error
|
||||
2. Add origin to `.env`:
|
||||
```bash
|
||||
CORS_ORIGINS=["http://localhost:3000", "http://localhost:3001", "http://your-frontend.com"]
|
||||
```
|
||||
3. Restart backend server
|
||||
|
||||
### Issue: Route Not Found (404)
|
||||
|
||||
**Cause**: Route not registered or incorrect path
|
||||
|
||||
**Solution**:
|
||||
1. Verify router is imported and registered in `app/main.py`
|
||||
2. Check prefix matches: `/api/games/` vs `/api/game/`
|
||||
3. Verify route path in decorator matches request
|
||||
4. Check method matches (GET vs POST)
|
||||
|
||||
**Example Registration**:
|
||||
```python
|
||||
# In app/main.py
|
||||
from app.api.routes import games
|
||||
|
||||
app.include_router(
|
||||
games.router,
|
||||
prefix="/api/games", # All routes will be /api/games/*
|
||||
tags=["games"]
|
||||
)
|
||||
```
|
||||
|
||||
## Best Practices
|
||||
|
||||
### 1. Keep Route Handlers Thin
|
||||
|
||||
Route handlers should orchestrate, not implement logic:
|
||||
|
||||
```python
|
||||
# ❌ Bad - business logic in route handler
|
||||
@router.post("/games/")
|
||||
async def create_game(request: CreateGameRequest):
|
||||
# Validate teams exist
|
||||
# Check user permissions
|
||||
# Create game record
|
||||
# Initialize state
|
||||
# Send notifications
|
||||
# ... 100 lines of logic
|
||||
|
||||
# ✅ Good - orchestrate using service layer
|
||||
@router.post("/games/")
|
||||
async def create_game(request: CreateGameRequest, user = Depends(get_current_user)):
|
||||
game_service = GameService()
|
||||
game = await game_service.create_game(request, user['user_id'])
|
||||
return game
|
||||
```
|
||||
|
||||
### 2. Use Explicit Response Models
|
||||
|
||||
Always specify `response_model` for type safety and documentation:
|
||||
|
||||
```python
|
||||
# ❌ Bad - no response model
|
||||
@router.get("/games/{game_id}")
|
||||
async def get_game(game_id: str):
|
||||
return {"game_id": game_id, "status": "active"}
|
||||
|
||||
# ✅ Good - explicit response model
|
||||
@router.get("/games/{game_id}", response_model=GameResponse)
|
||||
async def get_game(game_id: str):
|
||||
return GameResponse(game_id=game_id, status="active")
|
||||
```
|
||||
|
||||
### 3. Document Endpoints
|
||||
|
||||
Use docstrings for endpoint documentation:
|
||||
|
||||
```python
|
||||
@router.get("/games/", response_model=List[GameListItem])
|
||||
async def list_games(
|
||||
league_id: Optional[str] = None,
|
||||
status: Optional[str] = None
|
||||
):
|
||||
"""
|
||||
List games with optional filters.
|
||||
|
||||
Query Parameters:
|
||||
- league_id: Filter by league ('sba' or 'pd')
|
||||
- status: Filter by status ('pending', 'active', 'completed')
|
||||
|
||||
Returns:
|
||||
- List of GameListItem objects
|
||||
|
||||
Raises:
|
||||
- 400: Invalid filter parameters
|
||||
- 500: Database error
|
||||
"""
|
||||
...
|
||||
```
|
||||
|
||||
### 4. Handle Errors Gracefully
|
||||
|
||||
Return meaningful error messages:
|
||||
|
||||
```python
|
||||
@router.get("/games/{game_id}")
|
||||
async def get_game(game_id: str):
|
||||
game = await db_ops.get_game(game_id)
|
||||
|
||||
if not game:
|
||||
raise HTTPException(
|
||||
status_code=404,
|
||||
detail=f"Game {game_id} not found"
|
||||
)
|
||||
|
||||
return game
|
||||
```
|
||||
|
||||
### 5. Use Dependency Injection
|
||||
|
||||
Share common logic via dependencies:
|
||||
|
||||
```python
|
||||
from fastapi import Depends
|
||||
|
||||
async def get_db_ops():
|
||||
"""Dependency for database operations"""
|
||||
return DatabaseOperations()
|
||||
|
||||
@router.get("/games/{game_id}")
|
||||
async def get_game(
|
||||
game_id: str,
|
||||
db_ops: DatabaseOperations = Depends(get_db_ops)
|
||||
):
|
||||
# db_ops injected automatically
|
||||
game = await db_ops.get_game(game_id)
|
||||
return game
|
||||
```
|
||||
|
||||
### 6. Version Your API
|
||||
|
||||
When making breaking changes, use API versioning:
|
||||
|
||||
```python
|
||||
# Option 1: URL path versioning
|
||||
app.include_router(games_v1.router, prefix="/api/v1/games")
|
||||
app.include_router(games_v2.router, prefix="/api/v2/games")
|
||||
|
||||
# Option 2: Header versioning (more complex)
|
||||
@router.get("/games/")
|
||||
async def list_games(api_version: str = Header(default="v1")):
|
||||
if api_version == "v2":
|
||||
return new_format_games()
|
||||
else:
|
||||
return legacy_format_games()
|
||||
```
|
||||
FastAPI auto-generates documentation:
|
||||
- Swagger UI: `http://localhost:8000/docs`
|
||||
- ReDoc: `http://localhost:8000/redoc`
|
||||
|
||||
## References
|
||||
|
||||
- **FastAPI Documentation**: https://fastapi.tiangolo.com/
|
||||
- **Pydantic Documentation**: https://docs.pydantic.dev/
|
||||
- **Main Application**: `app/main.py` (router registration)
|
||||
- **Settings**: `app/config.py` (application configuration)
|
||||
- **Database Layer**: `app/database/operations.py` (DB operations)
|
||||
- **WebSocket Layer**: `app/websocket/handlers.py` (real-time events)
|
||||
- **Authentication**: `app/utils/auth.py` (JWT utilities)
|
||||
|
||||
## Future Enhancements
|
||||
|
||||
### Phase 1 (Weeks 1-4)
|
||||
|
||||
- [ ] Complete Discord OAuth flow in `auth.py`
|
||||
- [ ] Add authentication middleware
|
||||
- [ ] Create user session endpoints
|
||||
- [ ] Add token refresh mechanism
|
||||
|
||||
### Phase 2+ (Weeks 5-13)
|
||||
|
||||
- [ ] Implement game CRUD in `games.py`
|
||||
- [ ] Add game listing with filters and pagination
|
||||
- [ ] Create team management endpoints
|
||||
- [ ] Add roster/lineup endpoints
|
||||
- [ ] Create statistics/analytics endpoints
|
||||
- [ ] Add game history endpoints
|
||||
- [ ] Implement WebSocket-REST synchronization
|
||||
|
||||
### Beyond MVP
|
||||
|
||||
- [ ] Add comprehensive API rate limiting
|
||||
- [ ] Implement API key authentication for external integrations
|
||||
- [ ] Create admin endpoints for moderation
|
||||
- [ ] Add bulk operations endpoints
|
||||
- [ ] Create export endpoints (CSV, JSON)
|
||||
- [ ] Add advanced search and filtering
|
||||
- **WebSocket**: Main game communication via `../websocket/CLAUDE.md`
|
||||
- **Auth Utilities**: See `../utils/auth.py`
|
||||
|
||||
---
|
||||
|
||||
**Note**: This directory is currently 33% complete (health endpoints only). Most endpoints are stubs awaiting Phase 2+ implementation. Focus on health endpoints for current operational needs.
|
||||
|
||||
**Current Phase**: Phase 2 - Week 8
|
||||
**Last Updated**: 2025-10-31
|
||||
**Updated**: 2025-01-19
|
||||
|
||||
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Reference in New Issue
Block a user