NovatelSMS.scala

package org.psywerx

import java.net.{URLEncoder, MalformedURLException}
import java.util.Base64

object NovatelSMS {
  val responseMap = Map(
    "ok" -> "Ok",
    "auth" -> "Unsuccessful authentication",
    "to_number" -> "Invalid destination number",
    "no_msg" -> "Missing SMS text",
    "assert" -> "Assertion failed",
    "url" -> "Malformed URL",
    "" -> "General error"
  ) withDefaultValue "Unknown error"
}

class NovatelSMS(username: String, password: String) {
  def sendSMS(msg: String, number: String): String = {
    try {
      //TODO: base64 encode everything, as is recommended by API
      assert(msg.length <= 500)
      assert(number matches "(00)?[386][0-9]+")
      assert(!username.contains("&"))
      assert(!password.contains("&"))

      val msg64 = URLEncoder.encode(Base64.getEncoder().encodeToString(msg.getBytes))

      val url = s"""http://smsgw0.novatel.si/sms.php?msg_enc_type=base64&msg=${msg64}&username=${username}&password=${password}&to=${number}"""
      println("Sending SMS as: " + url)

      val response = io.Source.fromURL(url).mkString
      println("SMS response: " + response)
      val responseSplit = response.split(' ')

      responseSplit(0) match {
        case "ok" =>
          NovatelSMS.responseMap("ok")
        case "error" if (responseSplit.size == 2) =>
          NovatelSMS.responseMap(responseSplit(1))
        case _ =>
          NovatelSMS.responseMap("error")
      }
    } catch {
      case e: AssertionError =>
        println(e)
        NovatelSMS.responseMap("assert")
      case e: MalformedURLException =>
        println(e)
        NovatelSMS.responseMap("url")
      case e: Exception =>
        println(e)
        NovatelSMS.responseMap("error")
    }
  }
}