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package gronx
import (
"errors"
"fmt"
"strconv"
"strings"
"time"
)
func inStep(val int, s string, bounds []int) (bool, error) {
parts := strings.Split(s, "/")
step, err := strconv.Atoi(parts[1])
if err != nil {
return false, err
}
if step <= 0 {
return false, errors.New("step can't be 0")
}
if strings.Index(s, "*/") == 0 {
return (val-bounds[0])%step == 0, nil
}
if strings.Index(s, "0/") == 0 {
return val%step == 0, nil
}
sub, end := strings.Split(parts[0], "-"), val
start, err := strconv.Atoi(sub[0])
if err != nil {
return false, err
}
if len(sub) > 1 {
end, err = strconv.Atoi(sub[1])
if err != nil {
return false, err
}
}
if (len(sub) > 1 && end < start) || start < bounds[0] || end > bounds[1] {
return false, fmt.Errorf("step '%s' out of bounds(%d, %d)", parts[0], bounds[0], bounds[1])
}
return inStepRange(val, start, end, step), nil
}
func inRange(val int, s string, bounds []int) (bool, error) {
parts := strings.Split(s, "-")
start, err := strconv.Atoi(parts[0])
if err != nil {
return false, err
}
end, err := strconv.Atoi(parts[1])
if err != nil {
return false, err
}
if end < start || start < bounds[0] || end > bounds[1] {
return false, fmt.Errorf("range '%s' out of bounds(%d, %d)", s, bounds[0], bounds[1])
}
return start <= val && val <= end, nil
}
func inStepRange(val, start, end, step int) bool {
for i := start; i <= end && i <= val; i += step {
if i == val {
return true
}
}
return false
}
func isValidMonthDay(val string, last int, ref time.Time) (valid bool, err error) {
day, loc := ref.Day(), ref.Location()
if val == "L" {
return day == last, nil
}
pos := strings.Index(val, "W")
if pos < 1 {
return false, errors.New("invalid offset value: " + val)
}
nval, err := strconv.Atoi(val[0:pos])
if err != nil {
return false, err
}
for _, i := range []int{0, -1, 1, -2, 2} {
incr := i + nval
if incr > 0 && incr <= last {
iref := time.Date(ref.Year(), ref.Month(), incr, ref.Hour(), ref.Minute(), ref.Second(), 0, loc)
week := int(iref.Weekday())
if week > 0 && week < 6 && iref.Month() == ref.Month() {
valid = day == iref.Day()
break
}
}
}
return valid, nil
}
func isValidWeekDay(val string, last int, ref time.Time) (bool, error) {
loc := ref.Location()
if pos := strings.Index(val, "L"); pos > 0 {
nval, err := strconv.Atoi(val[0:pos])
if err != nil {
return false, err
}
for i := 0; i < 7; i++ {
day := last - i
dref := time.Date(ref.Year(), ref.Month(), day, ref.Hour(), ref.Minute(), ref.Second(), 0, loc)
if int(dref.Weekday()) == nval%7 {
return ref.Day() == day, nil
}
}
}
pos := strings.Index(val, "#")
parts := strings.Split(strings.ReplaceAll(val, "7#", "0#"), "#")
if pos < 1 || len(parts) < 2 {
return false, errors.New("invalid offset value: " + val)
}
day, err := strconv.Atoi(parts[0])
if err != nil {
return false, err
}
nth, err := strconv.Atoi(parts[1])
if err != nil {
return false, err
}
if day < 0 || day > 7 || nth < 1 || nth > 5 || int(ref.Weekday()) != day {
return false, nil
}
return (ref.Day()-1)/7 == nth-1, nil
}
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