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time.go
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time.go
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package xutil
import (
"fmt"
"strings"
"time"
)
func TimeTrunc(s string, t time.Time) time.Time {
y, m, d := t.Date()
H, M, S := t.Clock()
switch strings.ToLower(s) {
case "month":
return time.Date(y, m, 1, 0, 0, 0, 0, time.UTC)
case "day":
return time.Date(y, m, d, 0, 0, 0, 0, time.UTC)
case "hour":
return time.Date(y, m, d, H, 0, 0, 0, time.UTC)
case "minute":
return time.Date(y, m, d, H, M, 0, 0, time.UTC)
case "second":
return time.Date(y, m, d, H, M, S, 0, time.UTC)
case "week":
return time.Date(y, m, d-int(t.Weekday()), 0, 0, 0, 0, time.UTC)
}
return t
}
func TimeRule(s string, t time.Time, sum int) (ret []time.Time) {
t = TimeTrunc(s, t)
c := t
sign := 1
if sum > 0 {
sign = 1
} else {
sign = -1
}
for i := 0; i < sum*sign; i++ {
ret = append(ret, c)
switch strings.ToLower(s) {
case "month":
c = c.AddDate(0, 1*sign, 0)
case "day":
c = c.AddDate(0, 0, 1*sign)
case "week":
c = c.AddDate(0, 0, 7*sign)
case "hour":
c = c.Add(time.Hour * time.Duration(sign))
case "minute":
c = c.Add(time.Minute * time.Duration(sign))
case "second":
c = c.Add(time.Second * time.Duration(sign))
}
}
return
}
// DayLastRange 上周/上月/昨天
func DayLastRange(f string) (ret []string) {
y, m, d := time.Now().Date()
t := time.Date(y, m, d, 0, 0, 0, 0, time.UTC)
var btime, etime, curr time.Time
switch strings.ToLower(f) {
case "week":
etime = t.AddDate(0, 0, -int(t.Weekday()))
btime = etime.AddDate(0, 0, -7)
case "month":
etime = time.Date(y, m, 1, 0, 0, 0, 0, time.UTC)
btime = time.Date(y, m-1, 1, 0, 0, 0, 0, time.UTC)
case "day":
etime = time.Date(y, m, d, 0, 0, 0, 0, time.UTC)
btime = time.Date(y, m, d-1, 0, 0, 0, 0, time.UTC)
}
curr = btime
for curr.Before(etime) {
ret = append(ret, curr.Format("20060102"))
curr = curr.AddDate(0, 0, 1)
}
return
}
func TimeParse(s string) (t time.Time, err error) {
slen := len(s)
if strings.Contains(s, "-") {
if !strings.Contains(s, "T") {
switch slen {
case 10:
t, err = time.Parse("2006-01-02", s)
case 13:
t, err = time.Parse("2006-01-02 15", s)
case 16:
t, err = time.Parse("2006-01-02 15:04", s)
default:
t, err = time.Parse("2006-01-02 15:04:05", s)
}
} else {
switch slen {
case 13:
t, err = time.Parse("2006-01-02T15", s)
case 16:
t, err = time.Parse("2006-01-02T15:04", s)
default:
t, err = time.Parse("2006-01-02T15:04:05", s)
}
}
} else {
switch slen {
case 8:
t, err = time.Parse("20060102", s)
case 10:
t, err = time.Parse("2006010215", s)
case 12:
t, err = time.Parse("200601021504", s)
case 13:
t, err = time.Parse("20060102.1504", s)
case 15:
t, err = time.Parse("20060102.150405", s)
default:
t, err = time.Parse("20060102150405", s)
}
}
return
}
func TimeFormat(f string, t ...time.Time) (ret []string) {
for _, v := range t {
ret = append(ret, v.Format(f))
}
return
}
func TimeSplit(b, e time.Time, d time.Duration) (r []time.Time) {
for c := b; c.Before(e); c = c.Add(d) {
r = append(r, c)
}
return
}
func TimeExtend(t time.Time, s int, d time.Duration) (r []time.Time) {
t = t.UTC().Truncate(d)
b, e := t, t.Add(time.Duration(s)*d)
if s < 0 {
b, e = t.Add(time.Duration(s)*d), t
}
return TimeSplit(b, e, d)
}
func test() {
x := TimeSplit(time.Now(), time.Now().AddDate(0, 0, 10), 24*time.Hour)
y := TimeFormat("20060102", x...)
fmt.Println(y)
x = TimeExtend(time.Now(), 10, 24*time.Hour)
y = TimeFormat("20060102", x...)
fmt.Println(y)
}