gistfile1.scala

object AuthenticatedSession extends Loggable {
  def logIn(credentialsOption: Option[Credentials]): Twitter = {
    val (tw, credentials) = credentialsOption match {
      case Some(cr) =>
        (createTwitter(Some(cr)), cr)
      case None =>
        val twitter = createTwitter(None)
        val requestToken = twitter.getOAuthRequestToken
        DesktopUtil.browse(requestToken.getAuthorizationURL)
        (twitter, Dialog.showInput(null, "Enter the PIN from the Twitter authorization page in your browser",
          "Enter PIN", Dialog.Message.Question, null, List[String](), "") match {
          case Some(pin: String) =>
            val token = twitter.getOAuthAccessToken(requestToken, pin)
            CredentialsRepository.save(Credentials(Constants.ServiceName, token.getScreenName,
                token.getToken, token.getTokenSecret))
          case _ => throw new RuntimeException("No PIN received")
        })
    }

    try {
        val twitterUser = tw.verifyCredentials
        info("Verified credentials of " + twitterUser.getScreenName)
    } catch {
      case te: TwitterException =>
        CredentialsRepository.delete(credentials)
        throw new RuntimeException("Failed to verify credentials: " + te.getMessage)
    }

    tw
  }