Summary

This PR implements the Create Gist API endpoint (POST /api/gists) with comprehensive error handling improvements. This addresses Issue #105 and establishes a pattern for consistent API error handling across the application.

Changes

🚀 New Features

• Create Gist API (POST /api/gists)
  • Multipart/form-data support for uploading encrypted blobs
  • PBKDF2-SHA256 password hashing for edit protection
  • Integration with storage operations for R2 persistence
  • Comprehensive input validation using Zod
  • Support for expiry dates and one-time view options

🛠️ Error Handling Improvements

• Centralized Error Handling (lib/api-errors.ts)

  • Consistent error response format across all APIs
  • Type-safe error creation and conversion utilities
  • Helper functions for common error scenarios
  • Automatic error logging for unexpected failures

• API Error Response Format

  {
    error: ErrorCode,      // Standardized error code
    message: string,       // Human-readable message
    details?: Record<string, unknown>  // Optional context
  }

🧪 Testing

• Full test coverage for Create Gist API (12 tests)
• Type-safe testing with proper TypeScript type guards
• No more any type casting in tests
• Comprehensive error scenario testing

📚 Documentation

• Created docs/API_ERROR_HANDLING.md with:
  • Best practices for API error handling
  • Common error patterns and examples
  • Migration guide for existing routes
  • Testing strategies

Test Results

All tests passing:

• ✅ Create Gist API: 12/12 tests
• ✅ API Error Utilities: 11/11 tests
• ✅ Type checking: No errors
• ✅ Linting: Clean

Example Usage

// Create a gist
const formData = new FormData();
formData.append('metadata', new Blob([JSON.stringify({
  expires_at: "2024-12-31T23:59:59Z",
  one_time_view: false
})], { type: 'application/json' }));
formData.append('blob', encryptedData);
formData.append('password', 'optional-edit-password');

const response = await fetch('/api/gists', {
  method: 'POST',
  body: formData
});

Breaking Changes

None. This is a new API endpoint.

Related Issues

• Closes feat: implement POST /api/gists endpoint #105 (Create Gist API endpoint)
• Part of Phase 5: API Development

Next Steps

• Implement Read Gist APIs (Issue feat: implement GET endpoints for gists #106)
• Add Update/Delete endpoints (Issue feat: implement PUT and DELETE endpoints for gists #107)
• Apply same error handling pattern to other API routes

🤖 Generated with Claude Code

Co-Authored-By: Claude claude@ghostpaste.dev