Github webhook handler digest handler

GithubWebhookHandler.scala

import org.apache.commons.codec.digest.{HmacAlgorithms, HmacUtils}

class WebHookHandler(webhookSecret:String) {

   private val hmacDigest = new HmacUtils(HmacAlgorithms.HMAC_SHA_1, webhookSecret)
   private val xHubSignaturePattern = "sha1=(.+)".r

   private def validate(xHubSignature: String, body: String): Boolean = {
     xHubSignature match {
       case xHubSignaturePattern(sha1) => sha1 == hmacDigest.hmacHex(body)
       case _ => false
     }
   }
   
  private def handle(headers:Map[String,String], body:String):Unit = {
    val validated = headers.get("x-hub-signature").map(xHubSignature=>validate(xHubSignature, body)).getOrElse(false)
    if (validated){
      headers.get("X-GitHub-Event") match {
        case Some("pull_request") => ... //parse pullRequest structure
        case Some("push") => ... //parse push event structure
        case _ => Unit
      }
    }
  }
 }