feat: added product module and it comps

apps/backend/src/core/core.module.ts

@@ -4,6 +4,7 @@ import { ConfigModule, ConfigService } from "@nestjs/config";
 import { GraphQLModule } from "@nestjs/graphql";
 
 import { CategoryModule } from "src/modules/categories/category.module";
+import { ProductModule } from "src/modules/products/product.module";
 import { IS_DEV_ENV } from "src/shared/utils/is-dev.util";
 import { getGraphQLConfig } from "./config/graphql.config";
 import { PrismaModule } from "./prisma/prisma.module";
@@ -22,6 +23,7 @@ import { PrismaModule } from "./prisma/prisma.module";
 		}),
 		PrismaModule,
 		CategoryModule,
+		ProductModule,
 	],
 	controllers: [],
 	providers: [],

apps/backend/src/core/graphql/schema.gql

@@ -15,7 +15,20 @@ A date-time string at UTC, such as 2019-12-03T09:54:33Z, compliant with the date
 """
 scalar DateTime
 
+type ProductDTO {
+  categoryId: String!
+  createdAt: DateTime!
+  description: String
+  id: ID!
+  name: String!
+  price: Float!
+  slug: String!
+  updatedAt: DateTime!
+}
+
 type Query {
   categories: [Category!]!
   category(id: String!): Category
+  product(id: String!): ProductDTO
+  products: [ProductDTO!]!
 }

apps/backend/src/modules/products/dto/product.dto.ts

@@ -0,0 +1,28 @@
+import { Field, Float, ID, ObjectType } from "@nestjs/graphql";
+
+@ObjectType()
+export class ProductDTO {
+	@Field(() => ID)
+	id: string;
+
+	@Field()
+	name: string;
+
+	@Field()
+	slug: string;
+
+	@Field({ nullable: true })
+	description?: string;
+
+	@Field(() => Float)
+	price: number;
+
+	@Field()
+	categoryId: string;
+
+	@Field(() => Date)
+	createdAt: Date;
+
+	@Field(() => Date)
+	updatedAt: Date;
+}

apps/backend/src/modules/products/product.module.ts

@@ -0,0 +1,8 @@
+import { Module } from "@nestjs/common";
+import { ProductResolver } from "./product.resolver";
+import { ProductService } from "./product.service";
+
+@Module({
+	providers: [ProductResolver, ProductService],
+})
+export class ProductModule {}

apps/backend/src/modules/products/product.resolver.ts

@@ -0,0 +1,18 @@
+import { Args, Query, Resolver } from "@nestjs/graphql";
+import { ProductDTO } from "./dto/product.dto";
+import { ProductService } from "./product.service";
+
+@Resolver(() => ProductDTO)
+export class ProductResolver {
+	constructor(private readonly productService: ProductService) {}
+
+	@Query(() => [ProductDTO])
+	async products() {
+		return this.productService.findAll();
+	}
+
+	@Query(() => ProductDTO, { nullable: true })
+	async product(@Args("id") id: string) {
+		return this.productService.findOne(id);
+	}
+}

apps/backend/src/modules/products/product.service.ts

@@ -0,0 +1,16 @@
+import { Injectable } from "@nestjs/common";
+import { PrismaService } from "src/core/prisma/prisma.service";
+import { ProductDTO } from "./dto/product.dto";
+
+@Injectable()
+export class ProductService {
+	constructor(private readonly prisma: PrismaService) {}
+
+	async findAll(): Promise<ProductDTO[]> {
+		return this.prisma.product.findMany();
+	}
+
+	async findOne(id: string): Promise<ProductDTO | null> {
+		return this.prisma.product.findUnique({ where: { id } });
+	}
+}