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@zenofolio/hyper-decor

v1.0.76

Published

Project core with utilities and features

Readme

@zenofolio/hyper-decor

Librería de decoradores para HyperExpress.

Este paquete proporciona una capa de abstracción basada en decoradores para facilitar el desarrollo de APIs con HyperExpress, enfocándose en la composición de resolutores para el manejo de parámetros y validación.


Características

  • Arquitectura de Composición: La resolución de parámetros, validación de DTOs y transformaciones se calculan durante la inicialización para minimizar la lógica en el flujo de peticiones.
  • Manejo de Archivos (@File): Implementación basada en streams para la validación de tamaño y tipo de archivos durante la subida.
  • Decoradores Polimórficos: Soporte para diferentes tipos de argumentos en decoradores de parámetros.
  • Integración con OpenAPI: Soporte básico para la generación de esquemas OpenAPI 3.0.

Instalación

npm install @zenofolio/hyper-decor

Uso

Definición de Aplicación

import { HyperApp, createApplication } from "@zenofolio/hyper-decor";

@HyperApp({
  modules: [UserModule],
  prefix: "/api"
})
class Application {}

const app = await createApplication(Application);
await app.listen(3000);

Decoradores de Parámetros

Los decoradores @Body, @Query, @Param y @Headers permiten diferentes formas de uso.

@HyperController("/users")
class UserController {
  
  // 1. Validación con DTO
  @Post("/")
  async create(@Body(CreateUserDto) user: CreateUserDto) {
    return user;
  }

  // 2. Extracción por clave y transformación funcional
  @Get("/:id")
  async findOne(@Param("id", v => parseInt(v)) id: number) {
    return { id };
  }

  // 3. Extracción de propiedad anidada con DTO
  @Post("/settings")
  async updateSettings(@Body("settings", SettingsDto) data: SettingsDto) {
    return data;
  }

  // 4. Extractores básicos
  @Get("/")
  async list(@Query() allQuery: any, @Req req: any) {
    return allQuery;
  }
}

Subida de Archivos (@File)

El decorador @File permite manejar la subida de archivos validando el tamaño y tipo (MIME) mediante streams.

@Post("/upload")
async upload(
  @File("avatar", {
    maxFileSize: 5 * 1024 * 1024,
    allowedExtensions: ["png", "jpg"],
    allowedMimeTypes: ["image/png", "image/jpeg"]
  }) file: UploadedFile
) {
  return { filename: file.filename, size: file.size };
}

OpenAPI y DTOs

Es posible utilizar clases para definir los esquemas de datos que se reflejarán en la documentación OpenAPI generada.

class CreateUserDto {
  age: number;
  name: string;
}

@Post("/")
async create(@Body(CreateUserDto) data: CreateUserDto) { ... }

Licencia

MIT