new api for offline sales

controllers/productController.go

@@ -309,6 +309,40 @@ func (ctl *ProductController) GetLocationProducts(c *fiber.Ctx) error {
 	})
 }
 
+// GetSaleTemplate serves the data the web app turns into the offline-sales
+// spreadsheet. Both tenantid and locationid are required rather than defaulted:
+// a template generated against the wrong outlet would carry productids the
+// import then rejects, which is a confusing failure a missing parameter should
+// not be able to cause.
+func (ctl *ProductController) GetSaleTemplate(c *fiber.Ctx) error {
+	tenantID, _ := strconv.Atoi(c.Query("tenantid"))
+	locationID, _ := strconv.Atoi(c.Query("locationid"))
+
+	if tenantID <= 0 || locationID <= 0 {
+		return c.JSON(fiber.Map{
+			"status":  false,
+			"code":    http.StatusBadRequest,
+			"message": "tenantid and locationid are required",
+		})
+	}
+
+	result, err := ctl.productService.GetSaleTemplate(tenantID, locationID)
+	if err != nil {
+		return c.JSON(fiber.Map{
+			"status":  false,
+			"code":    http.StatusInternalServerError,
+			"message": err.Error(),
+		})
+	}
+
+	return c.JSON(fiber.Map{
+		"status":  true,
+		"code":    http.StatusOK,
+		"message": "Success",
+		"details": result,
+	})
+}
+
 func (ctl *ProductController) GetLocationProductSummary(c *fiber.Ctx) error {
 	tenantID, _ := strconv.Atoi(c.Query("tenantid"))
 	locationID, _ := strconv.Atoi(c.Query("locationid"))