63 lines
2.1 KiB
Scala
63 lines
2.1 KiB
Scala
package Assignment8
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import net.liftweb.json
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import net.liftweb.json.DefaultFormats
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import java.net.URI
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import scala.concurrent.duration.Duration
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import scala.concurrent.{Await, Future}
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import scala.sys.process._
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import scala.util.{Failure, Success}
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object Ex2 extends App {
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implicit val ec: scala.concurrent.ExecutionContext = scala.concurrent.ExecutionContext.global
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implicit val formats: DefaultFormats.type = DefaultFormats
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case class Coin(id: String, icon: String, name: String, symbol: String, rank: Int, price: Double, priceBtc: Double, volume: Double, marketCap: Double, availableSupply: Double, totalSupply: Double, fullyDilutedValuation: Double, priceChange1h: Double, priceChange1d: Double, priceChange1w: Double, redditUrl: String, websiteUrl: String, twitterUrl: String, explorers: List[String])
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case class Currency(name: String, rate: Double, symbol: String, imageUrl: String)
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val BITCOIN_TO_USD: String = "https://openapiv1.coinstats.app/coins/bitcoin"
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val USD_TO_CHF: String = "https://openapiv1.coinstats.app/fiats"
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private val API_KEY: String = sys.env.getOrElse("OPENAPI_KEY", "")
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def getUrl(url: String): Future[String] = {
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Future {
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val uri: URI = new URI(url)
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val cmd: String = "curl -s -H 'X-API-KEY: " + API_KEY + "' " + uri.toString
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cmd.!!
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}
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}
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def extractBitcoinToUSDRate(jsonStr: String): Double = {
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val data: Coin = json.parse(jsonStr).extract[Coin]
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return data.price
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}
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def extractUSDToCHFRate(jsonStr: String): Double = {
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val data: List[Currency] = json.parse(jsonStr).extract[List[Currency]]
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return data.find(currency => currency.name == "CHF")
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.map(currency => currency.rate)
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.get
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}
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def getBitcoinToUSD: Future[Double] = {
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getUrl(BITCOIN_TO_USD) map extractBitcoinToUSDRate
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}
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def getUSDToCHF: Future[Double] = {
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getUrl(USD_TO_CHF) map extractUSDToCHFRate
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}
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val f: Future[Double] = for {
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btc2usd <- getBitcoinToUSD
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usd2chf <- getUSDToCHF
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} yield btc2usd * usd2chf
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f onComplete {
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case Success(value) => println(s"1 BTC == $value CHF")
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case Failure(e) => println(s"An error occurred: $e")
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}
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Await.ready(f, Duration.Inf)
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}
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