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grafana/pkg/tsdb/frame_util.go

38 lines
1.0 KiB

package tsdb
import (
"time"
"github.com/grafana/grafana-plugin-sdk-go/dataframe"
)
// SeriesToFrame converts a TimeSeries to a sdk Frame
func SeriesToFrame(series *TimeSeries) (*dataframe.Frame, error) {
timeVec := make([]*time.Time, len(series.Points))
floatVec := make([]*float64, len(series.Points))
for idx, point := range series.Points {
timeVec[idx], floatVec[idx] = convertTSDBTimePoint(point)
}
frame := dataframe.New(series.Name,
dataframe.NewField("time", nil, timeVec),
dataframe.NewField("value", dataframe.Labels(series.Tags), floatVec),
)
return frame, nil
}
// convertTSDBTimePoint coverts a tsdb.TimePoint into two values appropriate
// for Series values.
func convertTSDBTimePoint(point TimePoint) (t *time.Time, f *float64) {
timeIdx, valueIdx := 1, 0
if point[timeIdx].Valid { // Assuming valid is null?
tI := int64(point[timeIdx].Float64)
uT := time.Unix(tI/int64(1e+3), (tI%int64(1e+3))*int64(1e+6)) // time.Time from millisecond unix ts
t = &uT
}
if point[valueIdx].Valid {
f = &point[valueIdx].Float64
}
return
}