add : return order detail

src/modules/admin/controllers/order.controller.ts

@@ -43,6 +43,16 @@ export class AdminOrderController extends BaseController {
     return this.response({ pager, returnsOrders: data.returnsOrders });
   }
 
+  @ApiOperation("get detail of order that returned ==> login as admin")
+  @ApiResponse("successful", HttpStatus.Ok)
+  @ApiParam("returnOrderId", "id of return order", true)
+  @ApiAuth()
+  @httpGet("/returns/:returnOrderId", Guard.authAdmin(), ValidationMiddleware.validateQuery(PaginationDTO))
+  public async getReturnOrder(@requestParam("returnOrderId") returnOrderId: string) {
+    const returnOrder = await this.returnService.getReturnOrderDetail(returnOrderId);
+    return this.response({ returnOrder });
+  }
+
   @ApiOperation("approve a return order request with return order id")
   @ApiResponse("successful", HttpStatus.Ok)
   @ApiParam("returnOrderId", "id of return order", true)

src/modules/return/return.repository.ts

@@ -171,6 +171,124 @@ export class ReturnOrderRepo extends BaseRepository<IReturnOrder> {
     };
   }
 
+  async getReturnOrderDetail(returnOrderId: string) {
+    const [returnOrder] = await this.model.aggregate([
+      {
+        $match: {
+          _id: new Types.ObjectId(returnOrderId),
+        },
+      },
+      // 1) lookup order
+      {
+        $lookup: {
+          from: "orders",
+          localField: "order",
+          foreignField: "_id",
+          as: "order",
+        },
+      },
+      { $unwind: { path: "$order", preserveNullAndEmptyArrays: true } },
+
+      // 2) lookup return order items
+      {
+        $lookup: {
+          from: "returnorderitems",
+          localField: "_id",
+          foreignField: "returnOrderId",
+          as: "returnOrderItems",
+        },
+      },
+      { $unwind: { path: "$returnOrderItems", preserveNullAndEmptyArrays: true } },
+
+      // 3) lookup return reason
+      {
+        $lookup: {
+          from: "returnreasons",
+          localField: "returnOrderItems.reason",
+          foreignField: "_id",
+          as: "returnOrderItems.reason",
+        },
+      },
+      {
+        $unwind: {
+          path: "$returnOrderItems.reason",
+          preserveNullAndEmptyArrays: true,
+        },
+      },
+
+      // 4) lookup orderItem (the original order item)
+      {
+        $lookup: {
+          from: "orderitems",
+          localField: "returnOrderItems.orderItem",
+          foreignField: "_id",
+          as: "orderItem",
+        },
+      },
+      { $unwind: { path: "$orderItem", preserveNullAndEmptyArrays: true } },
+
+      // ✅ 5) populate shipmentItem from orderItem.shipmentItems
+      {
+        $addFields: {
+          "returnOrderItems.shipmentItem": {
+            $first: {
+              $filter: {
+                input: "$orderItem.shipmentItems",
+                as: "si",
+                cond: { $eq: ["$$si._id", "$returnOrderItems.shipmentItem"] },
+              },
+            },
+          },
+        },
+      },
+
+      // 6) attach orderItem itself
+      { $addFields: { "returnOrderItems.orderItem": "$orderItem" } },
+      // ✅ populate product inside shipmentItem
+      {
+        $lookup: {
+          from: "products", // name of your product collection
+          localField: "returnOrderItems.shipmentItem.product",
+          foreignField: "_id", // or "productId" if your product._id isn’t numeric
+          as: "returnOrderItems.shipmentItem.product",
+        },
+      },
+      {
+        $unwind: {
+          path: "$returnOrderItems.shipmentItem.product",
+          preserveNullAndEmptyArrays: true,
+        },
+      },
+      // 7) lookup shop
+      {
+        $lookup: {
+          from: "shops",
+          localField: "orderItem.shop",
+          foreignField: "_id",
+          as: "shop",
+        },
+      },
+      { $unwind: { path: "$shop", preserveNullAndEmptyArrays: true } },
+      { $addFields: { shopName: "$shop.shopName" } },
+
+      // 8) regroup all return items per return order
+      {
+        $group: {
+          _id: "$_id",
+          order: { $first: "$order" },
+          status: { $first: "$status" },
+          total_price: { $first: "$total_price" },
+          shopName: { $first: "$shopName" },
+          createdAt: { $first: "$createdAt" },
+          updatedAt: { $first: "$updatedAt" },
+          returnOrderItems: { $push: "$returnOrderItems" },
+        },
+      },
+    ]);
+
+    return returnOrder;
+  }
+
   async getAllReturnsForUser(userId: string) {
     const docs = await this.model.aggregate([
       {

src/modules/return/return.service.ts

@@ -37,6 +37,12 @@ class ReturnService {
       returnOrders,
     };
   }
+  //#######################################################
+
+  async getReturnOrderDetail(returnOrderId: string) {
+    const returnOrder = await this.returnOrderRepo.getReturnOrderDetail(returnOrderId);
+    return returnOrder;
+  }
 
   //#######################################################
   async getAllReturnOrders(queryDto: PaginationDTO) {