Handle "N/A" as valid value of the XOFFBATT field. Fixes #2.

status.go

@@ -242,19 +242,19 @@ func (s *Status) parseKVTime(k string, v string) (bool, error) {
 	var err error
 	switch k {
 	case keyDate:
-		s.Date, err = time.Parse(timeFormatLong, v)
+		s.Date, err = parseOptionalTime(timeFormatLong, v)
 	case keyStartTime:
-		s.StartTime, err = time.Parse(timeFormatLong, v)
+		s.StartTime, err = parseOptionalTime(timeFormatLong, v)
 	case keyXOnBat:
-		s.XOnBattery, err = time.Parse(timeFormatLong, v)
+		s.XOnBattery, err = parseOptionalTime(timeFormatLong, v)
 	case keyXOffBat:
-		s.XOffBattery, err = time.Parse(timeFormatLong, v)
+		s.XOffBattery, err = parseOptionalTime(timeFormatLong, v)
 	case keyLastStest:
-		s.LastSelftest, err = time.Parse(timeFormatLong, v)
+		s.LastSelftest, err = parseOptionalTime(timeFormatLong, v)
 	case keyBattDate:
-		s.BatteryDate, err = time.Parse(timeFormatShort, v)
+		s.BatteryDate, err = parseOptionalTime(timeFormatShort, v)
 	case keyEndAPC:
-		s.EndAPC, err = time.Parse(timeFormatLong, v)
+		s.EndAPC, err = parseOptionalTime(timeFormatLong, v)
 	default:
 		return false, nil
 	}
@@ -312,3 +312,15 @@ func parseDuration(d string) (time.Duration, error) {
 
 	return time.ParseDuration(fmt.Sprintf("%s%s", num, unit))
 }
+
+// parseOptionalTime parses a time string.
+// In addition to the specified layout, it also accepts the  special value "N/A"
+// (which apcupsd reports for some values and conditions); this value is mapped
+// to time.Time{}. The caller can check for this with time.IsZero().
+func parseOptionalTime(layout, value string) (time.Time, error) {
+	if value == "N/A" {
+		return time.Time{}, nil
+	}
+
+	return time.Parse(layout, value)
+}

status_test.go

@@ -49,6 +49,13 @@ func TestStatus_parseKV(t *testing.T) {
 				BatteryDate: time.Date(2016, time.September, 6, 0, 0, 0, 0, time.UTC),
 			},
 		},
+		{
+			desc: "N/A time.Time",
+			kv: "XOFFBATT : N/A",
+			s: &Status{
+				XOnBattery: time.Time{},
+			},
+		},
 		{
 			desc: "OK time.Duration",
 			kv:   "TIMELEFT: 10.5 Minutes",