mixin-unique-conversation-id

mixin-unique-conversation-id.go

//https://go.dev/play/
package main

import (
	"crypto/md5"
	"io"
	"strings"

	"github.com/gofrs/uuid"
)

func UniqueConversationId(userId, recipientId string) string {
	minId, maxId := userId, recipientId
	if strings.Compare(userId, recipientId) > 0 {
		maxId, minId = userId, recipientId
	}
	h := md5.New()
	io.WriteString(h, minId)
	io.WriteString(h, maxId)
	sum := h.Sum(nil)
	sum[6] = (sum[6] & 0x0f) | 0x30
	sum[8] = (sum[8] & 0x3f) | 0x80
	return uuid.FromBytesOrNil(sum).String()
}

func main() {
	println(UniqueConversationId("", ""))
}