PrettyPrinter for @Leisure Availability data

package com.wausoft.availability.parser

import com.google.gson.Gson
import scala.io.Source
import java.io.PrintWriter
import com.wausoft.availability.model._

object Program {
  def main(args: Array[String]): Unit = {
    // define paths
    val inPath = "C:\\Users\\Slench\\Desktop\\swissHouseData.json"
    val outPath = "C:\\Users\\Slench\\Desktop\\swissTuples.txt"

    println("Getting data") // read data from file and make a string out of it
    val data = Source.fromFile(inPath)("UTF-8").mkString

    println("Parsing data") // parse read data to a Response object
    val parsed = new Gson().fromJson(data, classOf[Response])

    // filter and flatten from List[List[T]] to List[T]
    val availabilityPeriods = parsed.result.map(_.availabilityPeriod).flatten

    // make tuples containing only the important data
    val relevantData = availabilityPeriods.map(i => (i.arrivalDate, i.departureDate, i.onRequest))

    // group by first element in tuple and then sort accordingly
    val groupedData = relevantData.groupBy(_._1).toList.sortBy(_._1)

    val writer = new PrintWriter(outPath)

    println("Writing data")
    for(e <- groupedData) {
      val common  = e._1
      val content = e._2.map(i => (i._2, i._3)).mkString(", ")
      writer.print(s"$common -> {$content}\n")
    }
    println("Finished writing")
    writer.close
  }
}