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lib/promutils: add ParseTimeAt() function

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This commit is contained in:
Aliaksandr Valialkin 2023-05-13 20:12:06 -07:00
parent 2613110f75
commit 1c47acda11
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GPG Key ID: A72BEC6CD3D0DED1
2 changed files with 49 additions and 41 deletions
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15
lib/promutils/time.go
View File

@ -13,8 +13,18 @@ import (
//
// It returns unix timestamp in seconds.
func ParseTime(s string) (float64, error) {
currentTimestamp := float64(time.Now().UnixNano()) / 1e9
return ParseTimeAt(s, currentTimestamp)
}
// ParseTimeAt parses time s in different formats, assuming the given currentTimestamp.
//
// See https://docs.victoriametrics.com/Single-server-VictoriaMetrics.html#timestamp-formats
//
// It returns unix timestamp in seconds.
func ParseTimeAt(s string, currentTimestamp float64) (float64, error) {
if s == "now" {
return float64(time.Now().UnixNano()) / 1e9, nil
return currentTimestamp, nil
}
sOrig := s
tzOffset := float64(0)
@ -49,8 +59,7 @@ func ParseTime(s string) (float64, error) {
if d > 0 {
d = -d
}
t := time.Now().Add(d)
return float64(t.UnixNano()) / 1e9, nil
return currentTimestamp + float64(d)/1e9, nil
}
if len(s) == 4 {
// Parse YYYY

75
lib/promutils/time_test.go
View File

@ -1,19 +1,18 @@
package promutils
import (
"math"
"testing"
"time"
)
func TestParseTimeSuccess(t *testing.T) {
f := func(s string, resultExpected float64) {
func TestParseTimeAtSuccess(t *testing.T) {
f := func(s string, currentTime, resultExpected float64) {
t.Helper()
result, err := ParseTime(s)
result, err := ParseTimeAt(s, currentTime)
if err != nil {
t.Fatalf("unexpected error: %s", err)
}
if math.Abs(result-resultExpected) > 10 {
if result != resultExpected {
t.Fatalf("unexpected result; got %v; want %v", result, resultExpected)
}
}
@ -21,55 +20,55 @@ func TestParseTimeSuccess(t *testing.T) {
now := float64(time.Now().UnixNano()) / 1e9
// duration relative to the current time
f("now", now)
f("1h5s", now-3605)
f("now", now, now)
f("1h5s", now, now-3605)
// negative duration relative to the current time
f("-5m", now-5*60)
f("-123", now-123)
f("-123.456", now-123.456)
f("now-1h5m", now-(3600+5*60))
f("-5m", now, now-5*60)
f("-123", now, now-123)
f("-123.456", now, now-123.456)
f("now-1h5m", now, now-(3600+5*60))
// Year
f("2023", 1.6725312e+09)
f("2023Z", 1.6725312e+09)
f("2023+02:00", 1.672524e+09)
f("2023-02:00", 1.6725384e+09)
f("2023", now, 1.6725312e+09)
f("2023Z", now, 1.6725312e+09)
f("2023+02:00", now, 1.672524e+09)
f("2023-02:00", now, 1.6725384e+09)
// Year and month
f("2023-05", 1.6828992e+09)
f("2023-05Z", 1.6828992e+09)
f("2023-05+02:00", 1.682892e+09)
f("2023-05-02:00", 1.6829064e+09)
f("2023-05", now, 1.6828992e+09)
f("2023-05Z", now, 1.6828992e+09)
f("2023-05+02:00", now, 1.682892e+09)
f("2023-05-02:00", now, 1.6829064e+09)
// Year, month and day
f("2023-05-20", 1.6845408e+09)
f("2023-05-20Z", 1.6845408e+09)
f("2023-05-20+02:30", 1.6845318e+09)
f("2023-05-20-02:30", 1.6845498e+09)
f("2023-05-20", now, 1.6845408e+09)
f("2023-05-20Z", now, 1.6845408e+09)
f("2023-05-20+02:30", now, 1.6845318e+09)
f("2023-05-20-02:30", now, 1.6845498e+09)
// Year, month, day and hour
f("2023-05-20T04", 1.6845552e+09)
f("2023-05-20T04Z", 1.6845552e+09)
f("2023-05-20T04+02:30", 1.6845462e+09)
f("2023-05-20T04-02:30", 1.6845642e+09)
f("2023-05-20T04", now, 1.6845552e+09)
f("2023-05-20T04Z", now, 1.6845552e+09)
f("2023-05-20T04+02:30", now, 1.6845462e+09)
f("2023-05-20T04-02:30", now, 1.6845642e+09)
// Year, month, day, hour and minute
f("2023-05-20T04:57", 1.68455862e+09)
f("2023-05-20T04:57Z", 1.68455862e+09)
f("2023-05-20T04:57+02:30", 1.68454962e+09)
f("2023-05-20T04:57-02:30", 1.68456762e+09)
f("2023-05-20T04:57", now, 1.68455862e+09)
f("2023-05-20T04:57Z", now, 1.68455862e+09)
f("2023-05-20T04:57+02:30", now, 1.68454962e+09)
f("2023-05-20T04:57-02:30", now, 1.68456762e+09)
// Year, month, day, hour, minute and second
f("2023-05-20T04:57:43", 1.684558663e+09)
f("2023-05-20T04:57:43Z", 1.684558663e+09)
f("2023-05-20T04:57:43+02:30", 1.684549663e+09)
f("2023-05-20T04:57:43-02:30", 1.684567663e+09)
f("2023-05-20T04:57:43", now, 1.684558663e+09)
f("2023-05-20T04:57:43Z", now, 1.684558663e+09)
f("2023-05-20T04:57:43+02:30", now, 1.684549663e+09)
f("2023-05-20T04:57:43-02:30", now, 1.684567663e+09)
// milliseconds
f("2023-05-20T04:57:43.123Z", 1.6845586631230001e+09)
f("2023-05-20T04:57:43.123456789+02:30", 1.6845496631234567e+09)
f("2023-05-20T04:57:43.123456789-02:30", 1.6845676631234567e+09)
f("2023-05-20T04:57:43.123Z", now, 1.6845586631230001e+09)
f("2023-05-20T04:57:43.123456789+02:30", now, 1.6845496631234567e+09)
f("2023-05-20T04:57:43.123456789-02:30", now, 1.6845676631234567e+09)
}
func TestParseTimeFailure(t *testing.T) {