forked from mirrors/ntfy
95 lines
2.3 KiB
Go
95 lines
2.3 KiB
Go
package util
|
|
|
|
import (
|
|
"errors"
|
|
"github.com/olebedev/when"
|
|
"regexp"
|
|
"strconv"
|
|
"strings"
|
|
"time"
|
|
)
|
|
|
|
var (
|
|
errUnparsableTime = errors.New("unable to parse time")
|
|
durationStrRegex = regexp.MustCompile(`(?i)^(\d+)\s*(d|days?|h|hours?|m|mins?|minutes?|s|secs?|seconds?)$`)
|
|
)
|
|
|
|
func ParseFutureTime(s string, now time.Time) (time.Time, error) {
|
|
s = strings.TrimSpace(s)
|
|
t, err := parseUnixTime(s, now)
|
|
if err == nil {
|
|
return t, nil
|
|
}
|
|
t, err = parseFromDuration(s, now)
|
|
if err == nil {
|
|
return t, nil
|
|
}
|
|
t, err = parseNaturalTime(s, now)
|
|
if err == nil {
|
|
return t, nil
|
|
}
|
|
return time.Time{}, errUnparsableTime
|
|
}
|
|
|
|
func parseFromDuration(s string, now time.Time) (time.Time, error) {
|
|
d, err := parseDuration(s)
|
|
if err == nil {
|
|
return now.Add(d), nil
|
|
}
|
|
return time.Time{}, errUnparsableTime
|
|
}
|
|
|
|
func parseDuration(s string) (time.Duration, error) {
|
|
d, err := time.ParseDuration(s)
|
|
if err == nil {
|
|
return d, nil
|
|
}
|
|
matches := durationStrRegex.FindStringSubmatch(s)
|
|
if matches != nil {
|
|
number, err := strconv.Atoi(matches[1])
|
|
if err != nil {
|
|
return 0, errUnparsableTime
|
|
}
|
|
switch unit := matches[2][0:1]; unit {
|
|
case "d":
|
|
return time.Duration(number) * 24 * time.Hour, nil
|
|
case "h":
|
|
return time.Duration(number) * time.Hour, nil
|
|
case "m":
|
|
return time.Duration(number) * time.Minute, nil
|
|
case "s":
|
|
return time.Duration(number) * time.Second, nil
|
|
default:
|
|
return 0, errUnparsableTime
|
|
}
|
|
}
|
|
return 0, errUnparsableTime
|
|
}
|
|
|
|
func parseUnixTime(s string, now time.Time) (time.Time, error) {
|
|
t, err := strconv.Atoi(s)
|
|
if err != nil {
|
|
return time.Time{}, err
|
|
} else if int64(t) < now.Unix() {
|
|
return time.Time{}, errUnparsableTime
|
|
}
|
|
return time.Unix(int64(t), 0), nil
|
|
}
|
|
|
|
func parseNaturalTime(s string, now time.Time) (time.Time, error) {
|
|
r, err := when.EN.Parse(s, now) // returns "nil, nil" if no matches!
|
|
if err != nil || r == nil {
|
|
return time.Time{}, errUnparsableTime
|
|
} else if r.Time.After(now) {
|
|
return r.Time, nil
|
|
}
|
|
// Hack: If the time is parsable, but not in the future,
|
|
// simply append "tomorrow, " to it.
|
|
r, err = when.EN.Parse("tomorrow, "+s, now) // returns "nil, nil" if no matches!
|
|
if err != nil || r == nil {
|
|
return time.Time{}, errUnparsableTime
|
|
} else if r.Time.After(now) {
|
|
return r.Time, nil
|
|
}
|
|
return time.Time{}, errUnparsableTime
|
|
}
|