From d035e954f03d510fcd83e284bfea3b6e3e8b1dd5 Mon Sep 17 00:00:00 2001
From: Kosta <68782786+KostaD02@users.noreply.github.com>
Date: Tue, 15 Aug 2023 17:47:15 +0400
Subject: [PATCH] refactor(shop): pagination part

---
 src/modules/shop/dtos/index.ts                |  2 +-
 ...oduct.dto.ts => pagination-product.dto.ts} |  2 +-
 .../shop/product/products.controler.ts        |  4 +--
 src/modules/shop/product/products.service.ts  | 28 ++++++++-----------
 4 files changed, 16 insertions(+), 20 deletions(-)
 rename src/modules/shop/dtos/{all-product.dto.ts => pagination-product.dto.ts} (94%)

diff --git a/src/modules/shop/dtos/index.ts b/src/modules/shop/dtos/index.ts
index ca28bb3..7b8d8bd 100644
--- a/src/modules/shop/dtos/index.ts
+++ b/src/modules/shop/dtos/index.ts
@@ -2,4 +2,4 @@ export * from './create-product.dto';
 export * from './product.dto';
 export * from './update-product.dto';
 export * from './search-product-query.dto';
-export * from './all-product.dto';
+export * from './pagination-product.dto';
diff --git a/src/modules/shop/dtos/all-product.dto.ts b/src/modules/shop/dtos/pagination-product.dto.ts
similarity index 94%
rename from src/modules/shop/dtos/all-product.dto.ts
rename to src/modules/shop/dtos/pagination-product.dto.ts
index 78cb0af..2de41ed 100644
--- a/src/modules/shop/dtos/all-product.dto.ts
+++ b/src/modules/shop/dtos/pagination-product.dto.ts
@@ -2,7 +2,7 @@ import { IsOptional, IsNumber, Min, Max } from 'class-validator';
 import { API_CONFIG } from 'src/consts';
 import { GlobalExceptionKeys } from 'src/enums';
 
-export class AllProductsQueryDto {
+export class PaginationProductQueryDto {
   @IsOptional()
   @IsNumber({}, { message: GlobalExceptionKeys.PageIndexNotNumber })
   @Min(API_CONFIG.MINIMUM_PAGE_INDEX, {
diff --git a/src/modules/shop/product/products.controler.ts b/src/modules/shop/product/products.controler.ts
index cedb66b..8bcc4d2 100644
--- a/src/modules/shop/product/products.controler.ts
+++ b/src/modules/shop/product/products.controler.ts
@@ -10,7 +10,7 @@ import {
 } from '@nestjs/common';
 import { ProductsService } from './products.service';
 import {
-  AllProductsQueryDto,
+  PaginationProductQueryDto,
   CreateProductDto,
   SearchProductsQueryDto,
   UpdateProductDto,
@@ -39,7 +39,7 @@ export class ProductsController {
   }
 
   @Get('all')
-  getAllProduct(@Query() query: AllProductsQueryDto) {
+  getAllProduct(@Query() query: PaginationProductQueryDto) {
     return this.productsService.getAllProductsDetailed(query);
   }
 
diff --git a/src/modules/shop/product/products.service.ts b/src/modules/shop/product/products.service.ts
index 9461866..bddde07 100644
--- a/src/modules/shop/product/products.service.ts
+++ b/src/modules/shop/product/products.service.ts
@@ -6,7 +6,7 @@ import {
   CreateProductDto,
   SearchProductsQueryDto,
   UpdateProductDto,
-  AllProductsQueryDto,
+  PaginationProductQueryDto,
 } from '../dtos';
 import { Product, ProductDocument } from 'src/schemas';
 import { ExceptionService } from 'src/shared';
@@ -68,10 +68,16 @@ export class ProductsService {
     return this.productModel.find({});
   }
 
-  async getAllProductsDetailed(query: AllProductsQueryDto) {
+  getPaginationData(query: { page_index: number; page_size: number }) {
     const currentPage = query.page_index || API_CONFIG.MINIMUM_PAGE_INDEX;
     const responsePerPage = query.page_size || API_CONFIG.RESPONSE_PER_PAGE;
     const skip = responsePerPage * (Math.floor(currentPage) - 1);
+    return { currentPage, responsePerPage, skip };
+  }
+
+  async getAllProductsDetailed(query: PaginationProductQueryDto) {
+    const { currentPage, responsePerPage, skip } =
+      this.getPaginationData(query);
     const products = await this.productModel
       .find({})
       .sort({ 'price.current': 1 })
@@ -88,9 +94,8 @@ export class ProductsService {
   }
 
   async searchProduct(query: SearchProductsQueryDto) {
-    const currentPage = query.page_index || API_CONFIG.MINIMUM_PAGE_INDEX;
-    const responsePerPage = query.page_size || API_CONFIG.RESPONSE_PER_PAGE;
-    const skip = responsePerPage * (Math.floor(currentPage) - 1);
+    const { currentPage, responsePerPage, skip } =
+      this.getPaginationData(query);
     const queryObject: {
       'price.current'?: object;
       'category.id'?: string;
@@ -154,6 +159,8 @@ export class ProductsService {
       total: productsCount,
       limit: responsePerPage,
       page: currentPage,
+      sortedBy: Object.keys(sortObject)[0],
+      sortedDirection: query.sort_direction ?? 'asc',
       skip,
       products,
     };
@@ -203,15 +210,4 @@ export class ProductsService {
   deleteAllProduct() {
     return this.productModel.deleteMany({});
   }
-
-  private checkQueryNumberParam(param: number, key: string) {
-    if (isNaN(param) || param <= 0) {
-      this.exceptionService.throwError(
-        ExceptionStatusKeys.BadRequest,
-        param <= 0
-          ? `${key} should be greater than 0`
-          : `${key} should be number`,
-      );
-    }
-  }
 }