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import { Injectable } from "@nestjs/common"; |
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import { InjectModel } from "@nestjs/sequelize"; |
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import { Product } from "./entities/product.entity"; |
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import { CreateProductDto } from "./dto/create-product.dto"; |
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import { UpdateProductDto } from "./dto/update-product.dto"; |
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import { Op } from "sequelize"; |
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import { HttpException, HttpStatus } from "@nestjs/common"; |
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@Injectable() |
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export class ProductsService { |
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constructor(@InjectModel(Product) private readonly productModel: typeof Product) {} |
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// create a new product |
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async create(createProductDto: CreateProductDto): Promise<Product> { |
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try { |
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const existingProduct = await this.productModel.findOne({ |
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where: { name: createProductDto.name }, |
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}); |
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if (existingProduct) { |
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throw new HttpException( |
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'Product with this name already exists.', |
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HttpStatus.BAD_REQUEST, |
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); |
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} |
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const product = await this.productModel.create(createProductDto); |
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return product; |
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} catch (error) { |
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console.error(error); |
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throw new HttpException( |
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'An error occurred while creating the product.', |
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HttpStatus.INTERNAL_SERVER_ERROR, |
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); |
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} |
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} |
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// find a product by id |
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async findOne(id: string): Promise<Product> { |
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try { |
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const product = await this.productModel.findByPk(id); |
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if (!product) { |
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throw new HttpException( |
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'Product not found with the given id.', |
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HttpStatus.NOT_FOUND, |
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); |
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} |
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return product; |
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} catch (error) { |
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console.error(error); |
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throw new HttpException( |
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error.response, |
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HttpStatus.INTERNAL_SERVER_ERROR, |
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); |
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} |
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} |
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// list of all product |
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async findAll( |
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search?: string, |
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priceMin?: number, |
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priceMax?: number, |
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): Promise<Product[]> { |
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try { |
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// ساخت شرطهای جستجو و فیلتر |
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const where: any = {}; |
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if (search) { |
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where.name = { [Op.like]: `%${search}%` }; // جستجوی نام محصول به صورت جزئی |
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} |
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if (priceMin !== undefined) { |
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where.price = { ...(where.price || {}), [Op.gte]: priceMin }; // فیلتر حداقل قیمت |
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} |
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if (priceMax !== undefined) { |
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where.price = { ...(where.price || {}), [Op.lte]: priceMax }; // فیلتر حداکثر قیمت |
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} |
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const products = await this.productModel.findAll({ where }); |
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if (!products || products.length === 0) { |
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throw new HttpException('No products found.', HttpStatus.NOT_FOUND); |
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} |
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return products; |
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} catch (error) { |
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console.error(error); |
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throw new HttpException( |
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'An error occurred while retrieving products.', |
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HttpStatus.INTERNAL_SERVER_ERROR, |
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); |
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}} |
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// update a product info |
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async update(id: string, updateProductDto: UpdateProductDto): Promise<Product> { |
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try { |
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const product = await this.productModel.findByPk(id); |
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if (!product) { |
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throw new HttpException("Product not found.", HttpStatus.NOT_FOUND); |
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} |
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const { name, description, price, imageUrl, tags, quantity, brand, color, category } = updateProductDto; |
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if (name) product.name = name; |
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if (description) product.description = description; |
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if (price) product.price = price; |
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if (imageUrl) product.imageUrl = imageUrl; |
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if (tags) product.tags = tags; |
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if (quantity) product.quantity = quantity; |
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if (brand) product.brand = brand; |
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if (color) product.color = color; |
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if (category) product.category = category; |
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await product.save(); |
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return product; |
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} catch (error) { |
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throw new HttpException("An error occurred while updating the product.", HttpStatus.INTERNAL_SERVER_ERROR); |
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} |
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} |
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// delete a product |
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async remove(id: string): Promise<{ message: string }> { |
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try { |
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const product = await this.productModel.findByPk(id); |
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if (!product) { |
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throw new HttpException("Product not found with the given id.", HttpStatus.NOT_FOUND); |
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} |
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await product.destroy(); |
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return { message: "Product deleted successfully." }; |
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} catch (error) { |
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throw new HttpException("An error occurred while deleting the product.", HttpStatus.INTERNAL_SERVER_ERROR); |
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} |
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} |
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}
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