Refactor TradingHours struct and add validation for start and end times

date_utils/date_utils.go

@@ -296,6 +296,9 @@ func (t *TradingHours) Validate() bool {
 		}
 
 		startHourMinSlice := strings.Split(day.StartTime, ":")
+		if len(startHourMinSlice) != 2 {
+			return false
+		}
 		startHour, startMin := startHourMinSlice[0], startHourMinSlice[1]
 		startHourInt, err := strconv.Atoi(startHour)
 		if err != nil || startHourInt < 0 || startHourInt > 23 {
@@ -307,6 +310,9 @@ func (t *TradingHours) Validate() bool {
 		}
 
 		endHourMinSlice := strings.Split(day.EndTime, ":")
+		if len(endHourMinSlice) != 2 {
+			return false
+		}
 		endHour, endMin := endHourMinSlice[0], endHourMinSlice[1]
 		endHourInt, err := strconv.Atoi(endHour)
 		if err != nil || endHourInt < 0 || endHourInt > 23 {