anonircd/utilities.go

65 lines
1.0 KiB
Go

package main
import (
"encoding/base64"
"math/rand"
"sort"
"strings"
"crypto/md5"
"fmt"
"golang.org/x/crypto/sha3"
)
type Pair struct {
Key string
Value int
}
type PairList []Pair
func (p PairList) Len() int {
return len(p)
}
func (p PairList) Less(i, j int) bool {
return p[i].Value < p[j].Value
}
func (p PairList) Swap(i, j int) {
p[i], p[j] = p[j], p[i]
}
func sortMapByValues(m map[string]int) PairList {
pl := make(PairList, len(m))
i := 0
for k, v := range m {
pl[i] = Pair{k, v}
i++
}
sort.Sort(sort.Reverse(pl))
return pl
}
func randomIdentifier() string {
b := make([]byte, 10)
for i := range b {
b[i] = letters[rand.Intn(len(letters))]
}
return string(b)
}
func validChannelPrefix(channel string) bool {
return channel[0] == '&' || channel[0] == '#'
}
func generateHash(s string) string {
sha512 := sha3.New512()
_, err := sha512.Write([]byte(strings.Join([]string{s, fmt.Sprintf("%x", md5.Sum([]byte(s))), s}, "-")))
if err != nil {
return ""
}
return base64.URLEncoding.EncodeToString(sha512.Sum(nil))
}