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Panel1 API Standards

Overview

Panel1 uses tRPC for type-safe API development with end-to-end type safety between the backend and frontend.

API Design Principles

1. Type Safety

  • All API endpoints must be fully typed
  • Use Zod for runtime validation
  • Leverage TypeScript for compile-time checks
  • Share types between frontend and backend

2. Error Handling

  • Use standardized error types
  • Include proper error codes
  • Provide meaningful error messages
  • Handle edge cases gracefully

3. Authentication

  • JWT-based authentication
  • Include authorization headers
  • Validate tokens on each request
  • Handle token expiration

4. Performance

  • Optimize database queries
  • Use proper caching strategies
  • Implement pagination
  • Handle rate limiting

Router Structure

1. Router Organization

// Example router structure
export const catalogRouter = router({
  list: publicProcedure
    .input(z.object({...}))
    .query(async ({ctx, input}) => {...}),
  
  create: protectedProcedure
    .input(z.object({...}))
    .mutation(async ({ctx, input}) => {...}),
});

2. Procedure Types

  • publicProcedure: No authentication required
  • protectedProcedure: Requires authentication
  • adminProcedure: Requires admin privileges
  • Custom procedures for specific roles

3. Input Validation

  • Use Zod schemas for all inputs
  • Validate required fields
  • Type check all parameters
  • Handle invalid inputs gracefully

API Endpoints

1. Naming Conventions

  • Use descriptive names
  • Follow REST-like patterns
  • Be consistent across routers
  • Use proper HTTP methods

2. Response Format

// Standard success response
{
  success: true,
  data: T,
  metadata?: {
    count?: number,
    page?: number,
    // ... other metadata
  }
}

// Standard error response
{
  success: false,
  error: {
    code: string,
    message: string,
    details?: unknown
  }
}

3. Pagination

  • Use cursor-based pagination
  • Include total counts
  • Support limit/offset
  • Handle empty results

Security Standards

1. Authentication

  • Secure token handling
  • Proper session management
  • Token refresh mechanism
  • Logout handling

2. Authorization

  • Role-based access control
  • Permission checking
  • Tenant isolation
  • Resource ownership

3. Data Protection

  • Input sanitization
  • SQL injection prevention
  • XSS protection
  • CSRF protection

Error Handling

1. Error Types

export enum ErrorCode {
  UNAUTHORIZED = 'UNAUTHORIZED',
  FORBIDDEN = 'FORBIDDEN',
  NOT_FOUND = 'NOT_FOUND',
  VALIDATION_ERROR = 'VALIDATION_ERROR',
  INTERNAL_ERROR = 'INTERNAL_ERROR',
  // ... other error codes
}

2. Error Responses

  • Include stack traces in development
  • Sanitize error messages in production
  • Log errors appropriately
  • Include request IDs

Testing Standards

1. Unit Tests

  • Test each procedure independently
  • Mock external dependencies
  • Test error cases
  • Verify type safety

2. Integration Tests

  • Test complete workflows
  • Verify database operations
  • Test authentication flow
  • Check error handling

Documentation

1. Code Documentation

  • Document all procedures
  • Include example usage
  • Document error cases
  • Keep documentation updated

2. API Documentation

  • Generate API documentation
  • Include example requests/responses
  • Document error codes
  • Maintain changelog

Performance Guidelines

1. Query Optimization

  • Use proper indexes
  • Optimize JOIN operations
  • Implement caching
  • Monitor query performance

2. Rate Limiting

  • Implement per-user limits
  • Handle burst traffic
  • Set appropriate timeouts
  • Monitor API usage

Versioning

1. Version Control

  • Semantic versioning
  • Breaking changes handling
  • Deprecation notices
  • Migration guides

2. Backwards Compatibility

  • Maintain compatibility
  • Document changes
  • Provide migration paths
  • Support multiple versions

Monitoring

1. Logging

  • Request/response logging
  • Error logging
  • Performance metrics
  • Audit trails

2. Metrics

  • Response times
  • Error rates
  • Usage statistics
  • Resource utilization

Development Workflow

1. Code Review

  • Review type safety
  • Check error handling
  • Verify security measures
  • Test coverage

2. Deployment

  • Staging environment
  • Production deployment
  • Rollback procedures
  • Monitoring setup