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package utime
import (
"github.com/jinzhu/now"
"time"
)
const (
Day = 86400
Layout = "2006-01-02 15:04:05"
LayoutDay = "2006-01-02"
LayoutDay2 = "20060102"
LayoutMonth = "2006-01"
LayoutMinute = "2006-01-02 15:04"
)
// 获取时间所在周的第一天（周一) 00:00:00，和最后一天（周日）23:59:59
func WeekStartEnd(date time.Time) (start, end time.Time) {
w := 0
week := date.Weekday()
if week == time.Sunday {
w = 7
} else {
w = int(week)
}
startTmp := date.AddDate(0, 0, -w+1)
endTmp := date.AddDate(0, 0, 7-w)
start = time.Date(startTmp.Year(), startTmp.Month(), startTmp.Day(), 0, 0, 0, 0, startTmp.Location())
end = time.Date(endTmp.Year(), endTmp.Month(), endTmp.Day(), 23, 59, 59, 999, endTmp.Location())
return
}
// 当天开始结束
func DayStartEnd(date time.Time) (start, end time.Time) {
start = time.Date(date.Year(), date.Month(), date.Day(), 0, 0, 0, 0, date.Location())
end = time.Date(date.Year(), date.Month(), date.Day(), 23, 59, 59, 999, date.Location())
return
}
// 获取时间所在月的第一天（1号) 00:00:00，和最后一天23:59:59
func MonthStartEnd(date time.Time) (start, end time.Time) {
start = time.Date(date.Year(), date.Month(), 1, 0, 0, 0, 0, date.Location())
lastDay := now.New(start).EndOfMonth().Day()
end = time.Date(date.Year(), date.Month(), lastDay, 23, 59, 59, 999999999, date.Location())
return
}
// 增加年/月
// 因为golang原生的Time.AddDate增加月份的时候有bug
func AddDate(t time.Time, years int, months int) time.Time {
year, month, day := t.Date()
hour, min, sec := t.Clock()
// firstDayOfMonthAfterAddDate: years 年，months 月后的 那个月份的1号
firstDayOfMonthAfterAddDate := time.Date(year+years, month+time.Month(months), 1,
hour, min, sec, t.Nanosecond(), t.Location())
// firstDayOfMonthAfterAddDate 月份的最后一天
lastDay := now.New(firstDayOfMonthAfterAddDate).EndOfMonth().Day()
// 如果 t 的天 > lastDay，则设置为lastDay
// 如：t 为 2020-03-31 12:00:00 +0800，增加1个月，为4月31号
// 但是4月没有31号，则设置为4月最后一天lastDay（30号）
if day > lastDay {
day = lastDay
}
return time.Date(year+years, month+time.Month(months), day,
hour, min, sec, t.Nanosecond(), t.Location())
}