85 lines
1.6 KiB
Go
85 lines
1.6 KiB
Go
package activitypub
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import (
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"bytes"
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"fmt"
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"time"
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)
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const day = time.Hour * 24
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const week = day * 7
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const month = week * 4
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const year = month * 12
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func Days(d time.Duration) float64 {
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dd := d / day
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h := d % day
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return float64(dd) + float64(h)/(24*60*60*1e9)
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}
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func Weeks(d time.Duration) float64 {
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w := d / week
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dd := d % week
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return float64(w) + float64(dd)/(7*24*60*60*1e9)
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}
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func Months(d time.Duration) float64 {
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m := d / month
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w := d % month
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return float64(m) + float64(w)/(4*7*24*60*60*1e9)
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}
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func Years(d time.Duration) float64 {
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y := d / year
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m := d % year
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return float64(y) + float64(m)/(12*4*7*24*60*60*1e9)
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}
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func marshalXSD(d time.Duration) ([]byte, error) {
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if d == 0 {
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return []byte{'P','T','0','S'}, nil
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}
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neg := d < 0
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if neg {
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d = -d
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}
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y := Years(d)
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d -= time.Duration(y) * year
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m := Months(d)
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d -= time.Duration(m) * month
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dd := Days(d)
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d -= time.Duration(dd) * day
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H := d.Hours()
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d -= time.Duration(H) * time.Hour
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M := d.Minutes()
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d -= time.Duration(M) * time.Minute
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s := d.Seconds()
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d -= time.Duration(s) * time.Second
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b := bytes.Buffer{}
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if neg {
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b.Write([]byte{'-'})
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}
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b.Write([]byte{'P'})
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if y > 0 {
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b.WriteString(fmt.Sprintf("%dY", int64(y)))
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}
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if m > 0 {
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b.WriteString(fmt.Sprintf("%dM", int64(m)))
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}
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if dd > 0 {
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b.WriteString(fmt.Sprintf("%dD", int64(dd)))
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}
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if H + M + s > 0 {
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b.Write([]byte{'T'})
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if H > 0 {
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b.WriteString(fmt.Sprintf("%dH", int64(H)))
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}
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if M > 0 {
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b.WriteString(fmt.Sprintf("%dM", int64(M)))
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}
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if s > 0 {
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b.WriteString(fmt.Sprintf("%dS", int64(s)))
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}
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}
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return b.Bytes(), nil
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}
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