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time.go
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time.go
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/*
* Revision History:
* Initial: 2018/08/02 Li Zebang
*/
package config
import (
"fmt"
"strconv"
"strings"
"time"
)
const (
hour = int64(time.Hour)
day = 24 * hour
mouth = 30 * day
year = 365 * day
)
// StringToTime converts string to time.
func StringToTime(t, sep string) (time.Duration, error) {
ts := strings.Split(t, sep)
var duration int64
for index := range ts {
if yi := strings.Index(ts[index], "y"); yi != -1 {
yn, err := strconv.Atoi(ts[index][:yi])
if err != nil {
return 0, err
}
duration += int64(yn) * year
}
if mi := strings.Index(ts[index], "m"); mi != -1 {
mn, err := strconv.Atoi(ts[index][:mi])
if err != nil {
return 0, err
}
duration += int64(mn) * mouth
}
if di := strings.Index(ts[index], "d"); di != -1 {
mn, err := strconv.Atoi(ts[index][:di])
if err != nil {
return 0, err
}
duration += int64(mn) * day
}
if hi := strings.Index(ts[index], "h"); hi != -1 {
hn, err := strconv.Atoi(ts[index][:hi])
if err != nil {
return 0, err
}
duration += int64(hn) * hour
}
}
return time.Duration(duration), nil
}
// TimeToString converts time to string.
func TimeToString(t time.Duration, sep string) (string, error) {
ns := int64(t)
if ns < 0 {
return "", fmt.Errorf("%v is invalid time duration", t)
}
y := ns / year
ns = ns % year
m := ns / mouth
ns = ns % mouth
d := ns / day
ns = ns % day
h := ns / hour
var str string
if y != 0 {
str = fmt.Sprintf("%dy", y)
} else if m != 0 {
str = fmt.Sprintf("%s%s%dm", str, sep, m)
} else if d != 0 {
str = fmt.Sprintf("%s%s%dd", str, sep, d)
} else if h != 0 {
str = fmt.Sprintf("%s%s%dh", str, sep, h)
}
if str == "" {
return "", fmt.Errorf("%v is too short to be parsed", t)
}
return str, nil
}