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|
package common
import (
"regexp"
"strconv"
"time"
"github.com/olebedev/when/rules"
)
/*
- DD/MM/YYYY
- 11/3/2015
- 11/3/2015
- 11/3
also with "\", gift for windows' users
https://play.golang.org/p/29LkTfe1Xr
*/
var MONTHS_DAYS = []int{
0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31,
}
func getDays(year, month int) int {
// naive leap year check
if (year-2000)%4 == 0 && month == 2 {
return 29
}
return MONTHS_DAYS[month]
}
func SlashDMY(s rules.Strategy) rules.Rule {
return &rules.F{
RegExp: regexp.MustCompile("(?i)(?:\\W|^)" +
"(0{0,1}[1-9]|1[0-9]|2[0-9]|3[01])" +
"[\\/\\\\]" +
"(0{0,1}[1-9]|1[0-2])" +
"(?:[\\/\\\\]" +
"((?:1|2)[0-9]{3})\\s*)?" +
"(?:\\W|$)"),
Applier: func(m *rules.Match, c *rules.Context, o *rules.Options, ref time.Time) (bool, error) {
if (c.Day != nil || c.Month != nil || c.Year != nil) && s != rules.Override {
return false, nil
}
day, _ := strconv.Atoi(m.Captures[0])
month, _ := strconv.Atoi(m.Captures[1])
year := -1
if m.Captures[2] != "" {
year, _ = strconv.Atoi(m.Captures[2])
}
if day == 0 {
return false, nil
}
WithYear:
if year != -1 {
if getDays(year, month) >= day {
c.Year = &year
c.Month = &month
c.Day = &day
} else {
return false, nil
}
return true, nil
}
if int(ref.Month()) > month {
year = ref.Year() + 1
goto WithYear
}
if int(ref.Month()) == month {
if getDays(ref.Year(), month) >= day {
if day > ref.Day() {
year = ref.Year()
} else if day < ref.Day() {
year = ref.Year() + 1
} else {
return false, nil
}
goto WithYear
} else {
return false, nil
}
}
return true, nil
},
}
}
|
