add: create crud product

src/product/product.service.ts

@@ -0,0 +1,51 @@
+import { HttpException, HttpStatus, Injectable } from '@nestjs/common';
+import { EntityNotFoundError, Repository } from 'typeorm';
+import { Product } from './entities/product.entity';
+import { ProductCategories } from './entities/product-category.entity';
+import { ProductSubCategories } from './entities/product-sub-category.entity';
+import { InjectRepository } from '@nestjs/typeorm';
+import { CreateProductDto } from '../product/dto/create-product.dto';
+import { CreateCategoriesProductDto } from './dto/categories/create-categories-product.dto';
+import { CreateSubCategoriesProductDto } from './dto/sub-categories/create-sub-categories-product.dto';
+
+@Injectable()
+export class ProductService {
+  constructor(
+    @InjectRepository(Product)
+    private productRepository: Repository<Product>,
+  ) {}
+
+  async create(createProductDto: CreateProductDto) {
+    const result = await this.productRepository.insert(createProductDto);
+
+    return this.productRepository.findOneOrFail(result.identifiers[0].id);
+  }
+
+  findAll(page) {
+    return this.productRepository.findAndCount({
+      skip: page * 10,
+      take: 10,
+      order: {
+        version: 'DESC',
+      },
+    });
+  }
+
+  async findOne(id: string) {
+    try {
+      return await this.productRepository.findOneOrFail(id);
+    } catch (e) {
+      if (e instanceof EntityNotFoundError) {
+        throw new HttpException(
+          {
+            statusCode: HttpStatus.NOT_FOUND,
+            error: 'Data not found',
+          },
+          HttpStatus.NOT_FOUND,
+        );
+      } else {
+        throw e;
+      }
+    }
+  }
+}