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API Standards & Best Practices

🎯 API Design Principles

RESTful Design

  • Use HTTP methods correctly (GET, POST, PUT, DELETE)
  • Use plural nouns for resources
  • Use consistent URL patterns
  • Return appropriate HTTP status codes

Response Format

All API responses follow this structure:

{
  "data": {}, // or [] for collections
  "meta": {
    "total": 100,
    "page": 1,
    "limit": 50
  },
  "links": {
    "self": "/api/scriptures/volumes",
    "next": "/api/scriptures/volumes?page=2",
    "prev": null
  }
}

Error Handling

Standard error response format:

{
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid search query",
    "details": {
      "field": "query",
      "issue": "Query cannot be empty"
    }
  },
  "timestamp": "2025-01-05T12:00:00Z",
  "request_id": "req_123456"
}

📋 Endpoint Standards

Scripture Endpoints

  • GET /api/scriptures/volumes - List all volumes
  • GET /api/scriptures/volumes/{id}/books - List books in volume
  • GET /api/scriptures/books/{id}/chapters - List chapters in book
  • GET /api/scriptures/chapters/{id}/verses - List verses in chapter
  • GET /api/scriptures/search - Search scriptures
  • GET /api/scriptures/random - Get random scripture
  • GET /api/scriptures/reference/{book}/{chapter} - Get by reference

Query Parameters

  • limit: Number of results (default: 50, max: 100)
  • offset: Pagination offset (default: 0)
  • q: Search query
  • volume_id: Filter by volume
  • include_lds: Include LDS volumes in random (default: false)

Response Headers

  • Content-Type: application/json
  • X-Total-Count: Total number of results
  • X-Page: Current page number
  • X-Limit: Results per page
  • Cache-Control: Caching directives

🔒 Security Standards

Authentication

  • Currently: No authentication required (public API)
  • Future: JWT tokens for user-specific features

Rate Limiting

  • 100 requests per minute per IP
  • Rate limit headers included in responses
  • 429 status code for rate limit exceeded

CORS Configuration

  • Configured for specific origins
  • Preflight requests handled
  • Credentials not required

Input Validation

  • All inputs validated with Pydantic
  • SQL injection prevention
  • XSS protection through proper encoding

📊 Performance Standards

Response Times

  • Health check: < 1 second
  • Simple queries: < 500ms
  • Search queries: < 2 seconds
  • Complex operations: < 5 seconds

Caching Strategy

  • Static data (volumes, books): 1 hour
  • Chapter data: 30 minutes
  • Search results: 5 minutes
  • Health checks: No cache

Database Optimization

  • Indexed on frequently queried fields
  • Connection pooling
  • Query optimization
  • Prepared statements

🧪 Testing Standards

Unit Tests

  • All endpoints must have unit tests
  • Mock external dependencies
  • Test error conditions
  • Test edge cases

Integration Tests

  • Test database interactions
  • Test full request/response cycle
  • Test authentication (when implemented)
  • Test rate limiting

Performance Tests

  • Load testing for high-traffic scenarios
  • Stress testing for resource limits
  • Benchmark testing for optimization

📝 Documentation Standards

OpenAPI/Swagger

  • All endpoints documented
  • Request/response examples
  • Error codes documented
  • Authentication requirements

Code Comments

  • Docstrings for all functions
  • Type hints for all parameters
  • Complex logic explained
  • API versioning notes

🔄 Versioning Strategy

URL Versioning

  • Current: No version in URL
  • Future: /api/v1/scriptures/...
  • Backward compatibility maintained

Breaking Changes

  • Deprecation warnings in headers
  • Graceful degradation
  • Migration guides provided
  • Sunset dates communicated

🚨 Monitoring & Alerting

Metrics Tracked

  • Request count by endpoint
  • Response times (p50, p95, p99)
  • Error rates by type
  • Database query performance
  • Cache hit rates

Alerts

  • Response time > 2 seconds
  • Error rate > 5%
  • Database connection failures
  • High memory usage

📈 Future Enhancements

Planned Features

  • GraphQL endpoint
  • WebSocket support for real-time updates
  • Bulk operations
  • Advanced search filters
  • User preferences and bookmarks

Performance Improvements

  • Redis caching layer
  • CDN for static assets
  • Database read replicas
  • Microservice architecture