add sorting server side po and expense

internal/modules/expenses/services/expense.service.go

@@ -289,7 +289,40 @@ func (s expenseService) GetAll(c *fiber.Ctx, params *validation.Query) ([]expens
 				like,
 			)
 		}
-		return db.Order("expenses.created_at DESC").Order("expenses.updated_at DESC")
+		sortBy := strings.TrimSpace(params.SortBy)
+		sortOrder := strings.ToUpper(strings.TrimSpace(params.SortOrder))
+		if sortOrder == "" {
+			sortOrder = "DESC"
+		}
+
+		switch sortBy {
+		case "reference_number":
+			return db.Order("expenses.reference_number " + sortOrder)
+		case "transaction_date":
+			return db.Order("expenses.transaction_date " + sortOrder)
+		case "realization_date":
+			return db.Order("expenses.realization_date " + sortOrder)
+		case "location":
+			return db.Order("(SELECT COALESCE(name,'') FROM locations WHERE id = expenses.location_id) " + sortOrder)
+		case "created_user":
+			return db.Order("(SELECT COALESCE(name,'') FROM users WHERE id = expenses.created_by) " + sortOrder)
+		case "supplier":
+			return db.Order("(SELECT COALESCE(name,'') FROM suppliers WHERE id = expenses.supplier_id) " + sortOrder)
+		case "grand_total":
+			return db.Order(`(SELECT COALESCE(
+				(SELECT SUM(er.qty * er.price) FROM expense_realizations er
+				 JOIN expense_nonstocks en ON en.id = er.expense_nonstock_id
+				 WHERE en.expense_id = expenses.id),
+				(SELECT SUM(en2.qty * en2.price) FROM expense_nonstocks en2
+				 WHERE en2.expense_id = expenses.id),
+			0)) ` + sortOrder)
+		case "is_paid":
+			return db.Order("expenses.is_paid " + sortOrder)
+		case "created_at":
+			return db.Order("expenses.created_at " + sortOrder)
+		default:
+			return db.Order("expenses.created_at DESC").Order("expenses.updated_at DESC")
+		}
 	})
 
 	if scopeErr != nil {