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slacktime.go
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slacktime.go
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package structures
// in this file: slack timestamp parsing functions
import (
"fmt"
"strconv"
"strings"
"time"
"errors"
)
// ParseThreadID parses the thread id (ie. p1577694990000400) and returns
// time.Time.
func ParseThreadID(threadID string) (time.Time, error) {
if len(threadID) == 0 || threadID[0] != 'p' {
return time.Time{}, errors.New("not a thread ID")
}
if _, err := strconv.ParseInt(threadID[1:], 10, 64); err != nil {
return time.Time{}, errors.New("invalid thread ID")
}
return ParseSlackTS(threadID[1:11] + "." + threadID[11:])
}
// ParseSlackTS parses the slack timestamp.
func ParseSlackTS(timestamp string) (time.Time, error) {
const (
base = 10
bit = 64
)
sHi, sLo, found := strings.Cut(timestamp, ".")
var hi, lo int64
hi, err := strconv.ParseInt(sHi, base, bit)
if err != nil {
return time.Time{}, err
}
if found {
lo, err = strconv.ParseInt(sLo, base, bit)
if err != nil {
return time.Time{}, err
}
}
return time.Unix(hi, lo).UTC(), nil
}
func FormatSlackTS(ts time.Time) string {
if ts.IsZero() || ts.Before(time.Date(1970, 1, 1, 0, 0, 0, 0, time.UTC)) {
return ""
}
hi := ts.Unix()
lo := ts.UnixNano() % 1_000_000
return fmt.Sprintf("%d.%06d", hi, lo)
}