Klagarge/MSE-AdvProg-MicroProject
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Actualiser src/main/scala/TopSongs/TopSongs.scala

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jpcik 2025-03-11 09:45:15 +00:00
parent 046c984634
commit 9446c9d3c1
1 changed files with 22 additions and 29 deletions
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45
src/main/scala/TopSongs/TopSongs.scala
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@ -3,6 +3,8 @@ import scala.io.Source
import java.io.File import java.io.File
import com.github.tototoshi.csv._ import com.github.tototoshi.csv._
//jpc: seems all ok but can you add more interesting things to make the class structure more interesting?
//jpc perhaps adding enum for the Genre or type of band or person, or the sub-genre: hard rock, etc. If you don't have enough data you can add some data yourself just for fun
trait Person: trait Person:
val name: String val name: String
@ -10,28 +12,21 @@ case class Artist(name: String) extends Person
case class Writer(name: String) extends Person case class Writer(name: String) extends Person
case class Producer(name: String) extends Person case class Producer(name: String) extends Person
class Album(title: String, label: String) class Album(title: String, label: String)
class Streak(val s: String) { class Streak(val s: String) :
val streak: Option[Int] = { val streak: Option[Int] =
val regex = "\\d+".r val regex = "\\d+".r
if(s.equalsIgnoreCase("Did not chart")) { if(s.equalsIgnoreCase("Did not chart")) then Some(0)
Some(0) else regex.findFirstIn(s) match
} else {
regex.findFirstIn(s) match {
case Some(value) => Some(Integer.parseInt(value)) case Some(value) => Some(Integer.parseInt(value))
case None => None case None => None
}
} class Position(val p: String) :
} val position: Option[Int] =
}
class Position(val p: String) {
val position: Option[Int] = {
val regex = "\\d+".r val regex = "\\d+".r
regex.findFirstIn(p) match { regex.findFirstIn(p) match
case Some(value) => Some(Integer.parseInt(value)) case Some(value) => Some(Integer.parseInt(value))
case None => None case None => None
}
}
}
class Song( class Song(
val title: String, val title: String,
@ -44,21 +39,19 @@ class Song(
val position: Position val position: Position
) )
object TopSongs :
object TopSongs { var songs: List[Song] = List() //jpc: consider not using mutable variables
var songs: List[Song] = List() def addSong(song: Song): Unit =
def addSong(song: Song): Unit = {
songs = song :: songs songs = song :: songs
}
def printSongs(): Unit = { def printSongs(): Unit =
songs.foreach(song => println( songs.foreach(song => println(
s"${song.title} by ${song.artist.map(_.name).mkString(", ")} " + s"${song.title} by ${song.artist.map(_.name).mkString(", ")} " +
s"produced by ${song.producer.map(_.name).mkString(", ")} " + s"produced by ${song.producer.map(_.name).mkString(", ")} " +
s"spent ${song.streak.streak.getOrElse("no")} weeks " + s"spent ${song.streak.streak.getOrElse("no")} weeks " +
s"on the charts on Pos. ${song.position.position.getOrElse("NA")}" s"on the charts on Pos. ${song.position.position.getOrElse("NA")}"
)) ))
}
}
@main def main(): Unit = @main def main(): Unit =
// create a new TopSongs object // create a new TopSongs object
@ -66,7 +59,7 @@ object TopSongs {
val reader = CSVReader.open(new File("src/main/resources/songs.csv")) val reader = CSVReader.open(new File("src/main/resources/songs.csv"))
val allRows = reader.allWithHeaders() val allRows = reader.allWithHeaders()
for (row <- allRows) { for (row <- allRows) do
val s = Song( val s = Song(
title = row("title"), title = row("title"),
description = Some(row("description")), description = Some(row("description")),
@ -80,7 +73,7 @@ object TopSongs {
// add the song to the TopSongs object // add the song to the TopSongs object
topSongs.addSong(s) topSongs.addSong(s)
}
reader.close() reader.close()
// print the songs // print the songs