MCP Node.js TypeScript API

import { ProductRepository } from '../repositories/product.repository';
import { Product } from '../entities/product.entity';
import { CreateProductDto, UpdateProductDto } from '../dtos/product.dto';

export class ProductService {
  private productRepository: ProductRepository;

  constructor() {
    this.productRepository = new ProductRepository();
  }

  async createProduct(createProductDto: CreateProductDto): Promise<Product> {
    const product = await this.productRepository.create(createProductDto);
    return product;
  }

  async getAllProducts(): Promise<Product[]> {
    return await this.productRepository.findAll();
  }

  async getProductById(id: string): Promise<Product> {
    const product = await this.productRepository.findById(id);
    if (!product) {
      throw new Error('Product not found');
    }
    return product;
  }

  async updateProduct(id: string, updateProductDto: UpdateProductDto): Promise<Product> {
    const product = await this.productRepository.findById(id);
    if (!product) {
      throw new Error('Product not found');
    }

    const updatedProduct = await this.productRepository.update(id, updateProductDto);
    if (!updatedProduct) {
      throw new Error('Failed to update product');
    }

    return updatedProduct;
  }

  async deleteProduct(id: string): Promise<void> {
    const product = await this.productRepository.findById(id);
    if (!product) {
      throw new Error('Product not found');
    }

    const deleted = await this.productRepository.delete(id);
    if (!deleted) {
      throw new Error('Failed to delete product');
    }
  }
}