Acs , Desc handling for custom char calculation

utils/calculation.go

@@ -434,6 +434,7 @@ type ChartCalculationRequest struct {
 	AdditionalForGroupByAndSum string `json:"additional_for_groupby_and_sum"`
 	GetTop                     string `json:"get_top"`
 	SortBy                     string `json:"sort_by"`
+	SortAction                 string `json:"sort_action"`
 	Conversion                 string `json:"conversion"`
 }
 
@@ -475,7 +476,12 @@ func CalculateGroupedSum(observations []Observation, request ChartCalculationReq
 				val1, _ := strconv.ParseFloat(val1Str, 64)
 				val2, _ := strconv.ParseFloat(val2Str, 64)
 
-				return val1 > val2 // Descending order
+				sortActionKey := request.SortAction
+				if sortActionKey == "DESC" {
+					return val1 > val2 // Descending order
+				}
+				return val1 < val2 // Ascending order
+
 			})
 		} else {
 			// Default sorting by ObsValue.Value
@@ -553,7 +559,11 @@ func CalculateGroupedSum(observations []Observation, request ChartCalculationReq
 			val1, _ := strconv.ParseFloat(val1Str, 64)
 			val2, _ := strconv.ParseFloat(val2Str, 64)
 
-			return val1 > val2 // Descending order
+			sortActionKey := request.SortAction
+			if sortActionKey == "DESC" {
+				return val1 > val2 // Descending order
+			}
+			return val1 < val2 // Ascending order
 		})
 	} else {
 		// Default sorting by ObsValue.Value