Add downstream to interval parsing (#1088)

backend/gtime/gtime.go

@@ -6,6 +6,8 @@ import (
 	"strconv"
 	"strings"
 	"time"
+
+	"github.com/grafana/grafana-plugin-sdk-go/experimental/errorsource"
 )
 
 var dateUnitPattern = regexp.MustCompile(`^(\d+)([dwMy])$`)
@@ -37,7 +39,7 @@ func ParseInterval(inp string) (time.Duration, error) {
 		return now.AddDate(num, 0, 0).Sub(now), nil
 	}
 
-	return 0, fmt.Errorf("invalid interval %q", inp)
+	return 0, errorsource.DownstreamError(fmt.Errorf("invalid interval %q", inp), false)
 }
 
 // ParseDuration parses a duration with support for all units that Grafana uses.
@@ -69,7 +71,7 @@ func ParseDuration(inp string) (time.Duration, error) {
 		return dur * year, nil
 	}
 
-	return 0, fmt.Errorf("invalid duration %q", inp)
+	return 0, errorsource.DownstreamError(fmt.Errorf("invalid duration %q", inp), false)
 }
 
 func parse(inp string) (time.Duration, string, error) {