add : product stats

src/modules/product/Repository/comment.ts

@@ -1,6 +1,7 @@
 import { Types } from "mongoose";
 
 import { BaseRepository } from "../../../common/base/repository";
+import { Question_CommentStatus } from "../../../common/enums/question_comment.enum";
 import { ProductsCommentsQueries } from "../../../common/types/query.type";
 import { IComment } from "../models/Abstraction/IComment";
 import { CommentModel } from "../models/comment.model";
@@ -100,6 +101,31 @@ class CommentRepository extends BaseRepository<IComment> {
   async getCommentsForReport() {
     return await this.model.find({ status: "pending" }).countDocuments();
   }
+
+  async getProductStats(productId: number) {
+    const result = await this.model.aggregate([
+      {
+        $match: { product: productId, status: Question_CommentStatus.Accepted },
+      },
+      {
+        $group: {
+          _id: "$product",
+          commentsCount: { $sum: 1 },
+          averageRate: { $avg: "$rate" },
+        },
+      },
+      {
+        $project: {
+          _id: 0,
+          product: "$_id",
+          commentsCount: 1,
+          averageRate: { $round: ["$averageRate", 1] },
+        },
+      },
+    ]);
+
+    return result[0] || { product: productId, commentsCount: 0, averageRate: 0 };
+  }
 }
 
 function createCommentRepo(): CommentRepository {

src/modules/product/providers/product.service.ts

@@ -979,8 +979,9 @@ class ProductService {
       throw new BadRequestError(CommonMessage.NotEnoughVariant);
     }
     const product = ProductDTO.transformProduct(docs[0]);
+    const stats = await this.commentRepo.getProductStats(productId);
     const categoryPath = await this.categoryRepo.getCategoryPath(product.category._id.toString());
-    return { product, categoryPath };
+    return { product, categoryPath, stats };
   }
   //**************************************************************