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WebhookBot.scala
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WebhookBot.scala
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import java.net.URLEncoder
import akka.http.scaladsl.Http
import akka.http.scaladsl.model.{ HttpRequest, Uri }
import akka.http.scaladsl.unmarshalling.Unmarshal
import com.bot4s.telegram.api.Webhook
import com.bot4s.telegram.methods._
import com.bot4s.telegram.models.Message
import scala.concurrent.Future
/**
* Webhook-backed JS calculator.
* To test Webhooks locally, use an SSH tunnel or ngrok.
*/
class WebhookBot(token: String) extends AkkaExampleBot(token) with Webhook {
val port = 8080
val webhookUrl = "https://88c444ab.ngrok.io"
val baseUrl = "http://api.mathjs.org/v1/?expr="
override def receiveMessage(msg: Message): Future[Unit] =
msg.text.fold(Future.successful(())) { text =>
val url = baseUrl + URLEncoder.encode(text, "UTF-8")
for {
res <- Http().singleRequest(HttpRequest(uri = Uri(url)))
if res.status.isSuccess()
result <- Unmarshal(res).to[String]
_ <- request(SendMessage(msg.source, result))
} yield ()
}
}