akka-stream-with-springboot-api/src/main/scala/fr/natan/akkastreamfileprocessingapi/service/UtilitiesClass.scala

package fr.natan.akkastreamfileprocessingapi.service

import akka.stream.scaladsl.{Sink, Source}
import fr.natan.akkastreamfileprocessingapi.datasource.Datasource.{nameBasics, titleBasics, titlePrincipalsBasics}
import fr.natan.akkastreamfileprocessingapi.models.Models.Person
import fr.natan.akkastreamfileprocessingapi.models.ModelsBuilder.buildPersonModel
import fr.natan.akkastreamfileprocessingapi.service.AkkaStreamComponents.{actorSystem, buildSource}

import scala.concurrent.Future

object UtilitiesClass {

  def getTvSerieIdByPrimaryTitle(primaryTitle: String): Future[Option[String]] = {
    val source: Source[Map[String, String], _] = buildSource(inputFile = titleBasics)
    val tvSerieIdFuture: Future[Option[String]] = source
      .filter((rowMap: Map[String, String]) => {
        rowMap.getOrElse(key = "primaryTitle", default = "") == primaryTitle
      })
      .map((rowMap: Map[String, String]) => rowMap.get("tconst"))
      .runWith(Sink.head)

    tvSerieIdFuture
  }

  def getListOfPersonsIDByTvSerieID(tvSerieIdFuture: Future[Option[String]]): Future[IndexedSeq[Option[String]]] = {
    val source: Source[Map[String, String], _] = buildSource(inputFile = titlePrincipalsBasics)
    val personsIDsFuture: Future[IndexedSeq[Option[String]]] = source
      .filter((rowMaps: Map[String, String]) => {
        rowMaps.getOrElse(key = "tconst", default = "") == tvSerieIdFuture.value.get.get.get
      })
      .map((rowMap: Map[String, String]) => {
        rowMap.get(key = "nconst")
      })
      .runWith(Sink.collection)

    personsIDsFuture
  }

  def getListOfPersonsForTvSerie(listPersonsIDsFuture: Future[IndexedSeq[Option[String]]]): Future[IndexedSeq[Person]] = {

    val source: Source[Map[String, String], _] = buildSource(inputFile = nameBasics)
    val personsFuture: Future[IndexedSeq[Person]] = source
      .filter((rowMaps: Map[String, String]) => {
        listPersonsIDsFuture.value.get.get.contains(rowMaps.get(key = "nconst"))
      })
      .map((rowMap: Map[String, String]) => {
        buildPersonModel(rowMap)
      })
      .runWith(Sink.collection)

    personsFuture
  }

  def getTvSerieIDFuture(tvSerieId: String): Future[Option[String]] = {
    val source: Source[Map[String, String], _] = buildSource(inputFile = titlePrincipalsBasics)

    val tvSerieIdFuture: Future[Option[String]] = source.
      filter((rowMap: Map[String, String]) => rowMap.getOrElse(key = "tconst", default = "") == tvSerieId)
      .map((rowMap: Map[String, String]) => rowMap.get(key = "tconst"))
      .runWith(Sink.head)

    tvSerieIdFuture
  }

}