mirror of https://github.com/grafana/grafana.git
91 lines
1.8 KiB
Go
91 lines
1.8 KiB
Go
package tsdb
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import (
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"fmt"
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"strconv"
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"strings"
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"time"
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)
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func NewTimeRange(from, to string) *TimeRange {
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return &TimeRange{
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From: from,
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To: to,
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Now: time.Now(),
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}
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}
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type TimeRange struct {
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From string
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To string
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Now time.Time
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}
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func (tr *TimeRange) GetFromAsMsEpoch() int64 {
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return tr.MustGetFrom().UnixNano() / int64(time.Millisecond)
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}
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func (tr *TimeRange) GetToAsMsEpoch() int64 {
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return tr.MustGetTo().UnixNano() / int64(time.Millisecond)
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}
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func (tr *TimeRange) MustGetFrom() time.Time {
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if res, err := tr.ParseFrom(); err != nil {
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return time.Unix(0, 0)
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} else {
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return res
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}
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}
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func (tr *TimeRange) MustGetTo() time.Time {
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if res, err := tr.ParseTo(); err != nil {
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return time.Unix(0, 0)
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} else {
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return res
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}
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}
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func tryParseUnixMsEpoch(val string) (time.Time, bool) {
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if val, err := strconv.ParseInt(val, 10, 64); err == nil {
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seconds := val / 1000
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nano := (val - seconds*1000) * 1000000
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return time.Unix(seconds, nano), true
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}
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return time.Time{}, false
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}
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func (tr *TimeRange) ParseFrom() (time.Time, error) {
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if res, ok := tryParseUnixMsEpoch(tr.From); ok {
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return res, nil
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}
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fromRaw := strings.Replace(tr.From, "now-", "", 1)
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diff, err := time.ParseDuration("-" + fromRaw)
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if err != nil {
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return time.Time{}, err
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}
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return tr.Now.Add(diff), nil
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}
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func (tr *TimeRange) ParseTo() (time.Time, error) {
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if tr.To == "now" {
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return tr.Now, nil
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} else if strings.HasPrefix(tr.To, "now-") {
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withoutNow := strings.Replace(tr.To, "now-", "", 1)
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diff, err := time.ParseDuration("-" + withoutNow)
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if err != nil {
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return time.Time{}, nil
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}
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return tr.Now.Add(diff), nil
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}
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if res, ok := tryParseUnixMsEpoch(tr.To); ok {
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return res, nil
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}
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return time.Time{}, fmt.Errorf("cannot parse to value %s", tr.To)
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}
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