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utils.go
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/
utils.go
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package pacemaker
import (
"crypto"
"encoding/hex"
"strconv"
"strings"
"time"
"golang.org/x/exp/constraints"
)
func AtLeast(n int64) func(int64) int64 {
return func(m int64) int64 {
if m < n {
return n
}
return m
}
}
func Sha1Hash(s string) string {
data := make([]byte, 0, 40)
hasher := crypto.SHA1.New()
n, err := hasher.Write([]byte(s))
if err != nil {
panic(err)
}
if n != len(s) {
panic("insufficient bytes read")
}
return hex.EncodeToString(hasher.Sum(data))
}
func errIsRedisNoScript(err error) bool {
return strings.HasPrefix(err.Error(), "NOSCRIPT")
}
func min[T constraints.Integer](a, b T) T {
if a > b {
return b
}
return a
}
// TimeGTE returns true if `target` is greater than or equals `from`
func TimeGTE(from time.Time, target time.Time) bool {
// return target.After(from) || target.Equal(from)
return !target.Before(from)
}
func TimeFromNsStr(payload string) (t time.Time, err error) {
var n int64
n, err = strconv.ParseInt(payload, 10, 64)
if err != nil {
return
}
t = time.Unix(0, n)
return
}
func LatestTsFromKeys(keys []string, sep string) (ts time.Time, err error) {
for _, k := range keys {
parts := strings.Split(k, sep)
if len(parts) < 1 {
err = ErrNoLastKey
return
}
raw := parts[len(parts)-1]
var currentTs time.Time
currentTs, err = TimeFromNsStr(raw)
if err != nil {
return
}
if currentTs.After(ts) {
ts = currentTs
}
}
return
}