v0.0.29
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152
timeext/parser.go
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152
timeext/parser.go
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package timeext
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import (
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"errors"
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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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var durationShortStringMap = map[string]time.Duration{
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"ns": time.Nanosecond,
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"nanosecond": time.Nanosecond,
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"nanoseconds": time.Nanosecond,
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"us": time.Microsecond,
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"microsecond": time.Microsecond,
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"microseconds": time.Microsecond,
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"ms": time.Millisecond,
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"millisecond": time.Millisecond,
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"milliseconds": time.Millisecond,
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"s": time.Second,
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"sec": time.Second,
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"second": time.Second,
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"seconds": time.Second,
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"m": time.Minute,
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"min": time.Minute,
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"minute": time.Minute,
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"minutes": time.Minute,
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"h": time.Hour,
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"hour": time.Hour,
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"hours": time.Hour,
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"d": 24 * time.Hour,
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"day": 24 * time.Hour,
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"days": 24 * time.Hour,
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"w": 7 * 24 * time.Hour,
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"wk": 7 * 24 * time.Hour,
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"week": 7 * 24 * time.Hour,
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"weeks": 7 * 24 * time.Hour,
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}
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// ParseDurationShortString parses a duration in string format to a time.Duration
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// Examples for allowed formats:
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// - '10m'
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// - '10min'
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// - '1minute'
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// - '10minutes'
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// - '10.5minutes'
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// - '50s'
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// - '50sec'
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// - '1second'
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// - '50seconds'
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// - '100ms'
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// - '100millisseconds'
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// - '1h'
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// - '1hour'
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// - '2hours'
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// - '1d'
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// - '1day'
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// - '10days'
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// - '1d10m'
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// - '1d10m200sec'
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// - '1d:10m'
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// - '1d 10m'
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// - '1d,10m'
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func ParseDurationShortString(s string) (time.Duration, error) {
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s = strings.ToLower(s)
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segments := make([]string, 0)
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collector := ""
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prevWasNum := true
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for _, chr := range s {
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if chr >= '0' && chr <= '9' || chr == '.' {
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if prevWasNum {
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collector += string(chr)
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} else {
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segments = append(segments, collector)
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prevWasNum = true
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collector = string(chr)
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}
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} else if chr == ' ' || chr == ':' || chr == ',' {
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continue
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} else if chr >= 'a' && chr <= 'z' {
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prevWasNum = false
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collector += string(chr)
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} else {
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return 0, errors.New("unexpected character: " + string(chr))
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}
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}
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if !prevWasNum {
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segments = append(segments, collector)
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}
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result := time.Duration(0)
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for _, seg := range segments {
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segDur, err := parseDurationShortStringSegment(seg)
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if err != nil {
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return 0, err
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}
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result += segDur
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}
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return result, nil
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}
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func parseDurationShortStringSegment(segment string) (time.Duration, error) {
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num := ""
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unit := ""
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part0 := true
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for _, chr := range segment {
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if part0 {
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if chr >= 'a' && chr <= 'z' {
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part0 = false
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unit += string(chr)
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} else if chr >= '0' && chr <= '9' || chr == '.' {
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num += string(chr)
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} else {
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return 0, errors.New(fmt.Sprintf("Unexpected character '%s' in segment [%s]", string(chr), segment))
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}
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} else {
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if chr >= 'a' && chr <= 'z' {
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unit += string(chr)
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} else if chr >= '0' && chr <= '9' || chr == '.' {
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return 0, errors.New(fmt.Sprintf("Unexpected number '%s' in segment [%s]", string(chr), segment))
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} else {
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return 0, errors.New(fmt.Sprintf("Unexpected character '%s' in segment [%s]", string(chr), segment))
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}
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}
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}
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fpnum, err := strconv.ParseFloat(num, 64)
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if err != nil {
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return 0, errors.New(fmt.Sprintf("Failed to parse floating-point number '%s' in segment [%s]", num, segment))
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}
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if mult, ok := durationShortStringMap[unit]; ok {
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return time.Duration(int64(fpnum * float64(mult))), nil
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} else {
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return 0, errors.New(fmt.Sprintf("Unknown unit '%s' in segment [%s]", unit, segment))
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}
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}
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70
timeext/parser_test.go
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70
timeext/parser_test.go
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@ -0,0 +1,70 @@
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package timeext
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import (
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"testing"
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"time"
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)
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func TestParseDurationShortString(t *testing.T) {
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assertPDSSEqual(t, FromSeconds(1), "1s")
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assertPDSSEqual(t, FromSeconds(1), "1sec")
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assertPDSSEqual(t, FromSeconds(1), "1second")
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assertPDSSEqual(t, FromSeconds(1), "1seconds")
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assertPDSSEqual(t, FromSeconds(100), "100second")
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assertPDSSEqual(t, FromSeconds(100), "100seconds")
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assertPDSSEqual(t, FromSeconds(1883639.77), "1883639.77second")
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assertPDSSEqual(t, FromSeconds(1883639.77), "1883639.77seconds")
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assertPDSSEqual(t, FromSeconds(50), "50s")
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assertPDSSEqual(t, FromSeconds(50), "50sec")
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assertPDSSEqual(t, FromSeconds(1), "1second")
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assertPDSSEqual(t, FromSeconds(50), "50seconds")
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assertPDSSEqual(t, FromMinutes(10), "10m")
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assertPDSSEqual(t, FromMinutes(10), "10min")
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assertPDSSEqual(t, FromMinutes(1), "1minute")
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assertPDSSEqual(t, FromMinutes(10), "10minutes")
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assertPDSSEqual(t, FromMinutes(10.5), "10.5minutes")
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assertPDSSEqual(t, FromMilliseconds(100), "100ms")
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assertPDSSEqual(t, FromMilliseconds(100), "100milliseconds")
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assertPDSSEqual(t, FromMilliseconds(100), "100millisecond")
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assertPDSSEqual(t, FromNanoseconds(99235), "99235ns")
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assertPDSSEqual(t, FromNanoseconds(99235), "99235nanoseconds")
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assertPDSSEqual(t, FromNanoseconds(99235), "99235nanosecond")
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assertPDSSEqual(t, FromMicroseconds(99235), "99235us")
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assertPDSSEqual(t, FromMicroseconds(99235), "99235microseconds")
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assertPDSSEqual(t, FromMicroseconds(99235), "99235microsecond")
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assertPDSSEqual(t, FromHours(1), "1h")
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assertPDSSEqual(t, FromHours(1), "1hour")
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assertPDSSEqual(t, FromHours(2), "2hours")
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assertPDSSEqual(t, FromDays(1), "1d")
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assertPDSSEqual(t, FromDays(1), "1day")
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assertPDSSEqual(t, FromDays(10), "10days")
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assertPDSSEqual(t, FromDays(1), "1days")
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assertPDSSEqual(t, FromDays(10), "10day")
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assertPDSSEqual(t, FromDays(1)+FromMinutes(10), "1d10m")
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assertPDSSEqual(t, FromDays(1)+FromMinutes(10)+FromSeconds(200), "1d10m200sec")
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assertPDSSEqual(t, FromDays(1)+FromMinutes(10), "1d:10m")
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assertPDSSEqual(t, FromDays(1)+FromMinutes(10), "1d 10m")
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assertPDSSEqual(t, FromDays(1)+FromMinutes(10), "1d,10m")
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assertPDSSEqual(t, FromDays(1)+FromMinutes(10), "1d, 10m")
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assertPDSSEqual(t, FromDays(1)+FromSeconds(1000), "1d 1000seconds")
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assertPDSSEqual(t, FromDays(1), "86400s")
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}
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func assertPDSSEqual(t *testing.T, expected time.Duration, fmt string) {
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actual, err := ParseDurationShortString(fmt)
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if err != nil {
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t.Errorf("ParseDurationShortString('%s') failed with %v", fmt, err)
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}
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if actual != expected {
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t.Errorf("values differ: Actual: '%v', Expected: '%v'", actual.String(), expected.String())
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}
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}
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