nuntius/utils/utils.go at main · Dominic-Wassef/nuntius

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package utils

import (

"crypto/hmac"

"crypto/sha256"

"encoding/hex"

"fmt"

"math"

"math/rand"

"regexp"

"strings"

)

var channelValidationRegex = regexp.MustCompile("^[A-Za-z0-9_\\-=@,.;]+$")

// HashMAC Calculates the MAC signing with the given key and returns the hexadecimal encoded Result

func HashMAC(message, key []byte) string {

mac := hmac.New(sha256.New, key)

mac.Write(message)

expected := mac.Sum(nil)

return hex.EncodeToString(expected)

}

// GenerateSessionID Generate a new random Hash

func GenerateSessionID() string {

return fmt.Sprintf("%d.%d", rand.Intn(math.MaxInt32), rand.Intn(math.MaxInt32))

}

// IsChannelNameValid Verify if the channel name is valid

func IsChannelNameValid(channelName string) bool {

return channelValidationRegex.MatchString(channelName)

}

// IsPrivateChannel Verify if the channel name represents a private channel

func IsPrivateChannel(channelName string) bool {

return strings.HasPrefix(channelName, "private-")

}

// IsPresenceChannel Verify if the channel name represents a presence channel

func IsPresenceChannel(channelName string) bool {

return strings.HasPrefix(channelName, "presence-")

}

// IsClientEvent Verify if the event name represents a client event type

func IsClientEvent(event string) bool {

return strings.HasPrefix(event, "client-")

}