API Versioning Implementation + API Documentation Implementation#456
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Implements full API versioning support with the following features: ## Version Support - Version prefix (URL path-based: /api/v1, /api/v2) - Version headers (API-Version header) - Accept header with version parameter - Default version fallback to v2 ## Version Management - Supported versions: v1 (deprecated), v2 (active) - v1 sunset date: 2026-12-31 - Automatic deprecation warnings ## Backward Compatibility - Transform data between API versions - Field filtering by version - Custom transformer registration - Version-aware response handling ## Deprecation Management - @DeprecatedEndpoint decorator for deprecated endpoints - Automatic deprecation headers (Deprecation, Sunset, Warning) - X-API-Deprecation-Date header - Days-until-sunset calculations ## Components Created - api-version.constants.ts: Version definitions and utilities - api-version.decorator.ts: @apiversion and @DeprecatedEndpoint decorators - version-header.interceptor.ts: Global version handling - version.middleware.ts: Version validation - version.guard.ts: Route guard for version checking - deprecation-warning.interceptor.ts: Deprecation warnings - version-routing.service.ts: Version-aware routing - backward-compatibility.service.ts: Data transformations - get-version.decorator.ts: Version injection - versioned-dto.ts: DTO base classes - versioning.module.ts: Global module ## Integration - Registered in app.module.ts - Interceptors enabled in main.ts - Example usage in app.controller.ts ## Build Status - Zero compilation errors - Full TypeScript strict mode compliance - All tests passing
Implements full API documentation system with the following features: ## Swagger/OpenAPI Integration - Swagger UI available at /api/docs - Interactive API exploration and testing - Beautiful, customized Swagger UI theme - Support for multiple authentication methods - Server configuration for dev and production ## OpenAPI Specification - Full OpenAPI 3.0 specification - Machine-readable API definition - Client SDK generation compatible - OpenAPI JSON available at /api/openapi.json ## Documentation Features - Comprehensive endpoint documentation - Request/response schemas - Authentication requirements - Error responses and status codes - Rate limiting information - Deprecation notices ## API Information Endpoints - GET /api/info - API metadata and version info - GET /api/changelog - Complete changelog - GET /api/health - API health status - GET /api/endpoints - Endpoint discovery - GET /api/examples - Code examples - GET /api/rate-limits - Rate limiting info ## Code Examples - Authentication examples (register, login) - Versioning examples (header, path, accept) - Request/response samples - Common use cases ## Changelog - v2.0.0 (Active) - 2026-04-01 - API versioning system - Enhanced features and improvements - Better error handling - Security enhancements - v1.0.0 (Deprecated) - 2026-01-01 - Initial release - Sunset: 2026-12-31 ## API Documentation Decorators - @ApiPublicEndpoint - For public endpoints - @ApiProtectedEndpoint - For authenticated endpoints - @ApiAdminEndpoint - For admin-only endpoints - @ApiPaginatedEndpoint - For list endpoints - @ApiWithPathParam - For path parameters - @ApiDeprecatedEndpoint - For deprecated endpoints - @ApiVersionedEndpoint - For versioned endpoints - @ApiRateLimited - For rate-limited endpoints - @ApiSearchEndpoint - For search endpoints ## Components Created - swagger.config.ts: Swagger configuration - api-docs.controller.ts: Documentation endpoints - api-documentation.module.ts: Documentation module - api-decorators.ts: Custom decorators - changelog.ts: API changelog definition - api-decorators-example.ts: Usage examples ## Integration - Swagger UI enabled in main.ts - ApiDocumentationModule imported in app.module.ts - Interactive docs at /api/docs - OpenAPI spec at /api/docs-json ## Build Status - Zero compilation errors - All dependencies installed - Production-ready documentation
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LaGodxy
approved these changes
Apr 23, 2026
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Summary
Implemented comprehensive API versioning system with support for version prefixes, headers, backward compatibility, and deprecation management.
Key Features
✅ Version Prefix Support - URL path-based versioning (
/api/v1,/api/v2)✅ Version Headers - API-Version header detection
✅ Backward Compatibility - Data transformation between versions
✅ Deprecation Management - Automatic sunset warnings and headers
✅ Version Metadata - Status tracking (active, deprecated, sunset)
Files Added (12)
api-version.constants.ts- Version definitionsapi-version.decorator.ts- Decorators (@apiversion, @DeprecatedEndpoint)version-header.interceptor.ts- Global version handlingversion.middleware.ts- Validationversion.guard.ts- Route protectiondeprecation-warning.interceptor.ts- Deprecation noticesversion-routing.service.ts- Version-aware routingbackward-compatibility.service.ts- Data transformationsget-version.decorator.ts- Version injectionversioned-dto.ts- Response wrappersversioning.module.ts- Module exportexamples.controller.ts- Usage examplesFiles Modified (3)
src/main.ts- Interceptors registeredsrc/app.module.ts- VersioningModule importedsrc/app.controller.ts- Example decoratorsAcceptance Criteria ✅
Testing