Tugas Pertemuan 5 PBO

 Nama  : Moh. Rizky Rahmadian Makkani

NRP    : 5025231035

Kelas : PBO A

Tugas Pertemuan 5 : PBO

Main

public class Main {
    public static void main(String[] args) {
        MusicOrganizer org = new MusicOrganizer();

        org.listAllTracks();

        org.playTrack(1);
        org.playTrack(3);

        org.stopTrack();

        org.playTrack(2);

        org.stopTrack();
    }
}

Track Reader

package track;

import java.util.ArrayList;
import java.io.File;

public class TrackReader {

    public ArrayList readTracks(String folderName){
        ArrayList tracks = new ArrayList<>();

        File folder = new File(folderName);
        if (!folder.exists() || !folder.isDirectory()) {
            System.out.println("Invalid folder path!");
            return tracks;
        }

        File[] files = folder.listFiles((dir, name) -> name.endsWith(".mp3"));
        if (files == null || files.length == 0) {
            System.out.println("No mp3 files found in the folder.");
            return tracks;
        }

        for(File file : files){
            String fileNameFull = file.getName();
            String fileName = fileNameFull.substring(0, fileNameFull.lastIndexOf(".mp3"));

            String[] parts = fileName.split("-");
            if (parts.length == 2) {
                String title = parts[0].trim();
                String artist = parts[1].trim();

                tracks.add(new Track(fileName, artist, title));
            } else {
                System.out.println("File name format incorrect for: " + fileName);
            }
        }

        return tracks;
    }

}

ClassTrack

package track;

public class Track {
    private String filename;
    private String artist;
    private String title;

    public Track(String filename, String artist, String title){
        this.filename = filename;
        this.artist = artist;
        this.title = title;
    }

    public String getFilename(){
        return filename;
    }

    public String getArtist(){
        return artist;
    }

    public String getTitle(){
        return title;
    }

    public String getDisplayString(){
        return artist + " - " + title;
    }
}

MusicPlayer

package music;

public class MusicPlayer {
    private boolean isPlaying;

    public MusicPlayer(){
        isPlaying = false;
    }

    public void startPlaying(String filename){
        System.out.println("File: " + filename + " is now playing.");
        isPlaying = true;
    }

    public void stopPlaying(){
        if(isPlaying){
            System.out.println("Track stopped.");
            isPlaying = false;
        }else{
            System.out.println("No track is currently playing.");
        }
    }
}

Music Organizer

package music;

import track.*;
        import java.util.ArrayList;

public class MusicOrganizer {
    private ArrayList tracks;
    private MusicPlayer player;
    private TrackReader reader;

    public MusicOrganizer(){
        tracks = new ArrayList();
        player = new MusicPlayer();
        reader = new TrackReader();
        readLibrary("../music_files");
        System.out.println("Music library loaded. " + getNumberOfTracks() + " tracks.");
        System.out.println();
    }

    public void addTrack(Track track){
        tracks.add(track);
    }

    public int getNumberOfTracks(){
        return tracks.size();
    }

    public void searchTrack(int index){
        if(index >= 0 && index < tracks.size()){
            Track result = tracks.get(index);
            System.out.println(result.getDisplayString());
        }
    }

    public void listAllTracks(){

        if(tracks.size() > 0){
            System.out.println("Tracks List:");

            int index = 0;
            while(index < tracks.size()){
                Track track = tracks.get(index);
                index++;
                System.out.println(index + ". " + track.getDisplayString());
            }
        }else{
            System.out.println("Tracks List is empty.");
        }

        System.out.println("");
    }

    public void removeTrack(int index){
        if(index >= 0 && index < tracks.size()){
            tracks.remove(index);
        }
    }

    public void playTrack(int index){
        int real_index = index - 1;
        if(indexValid(real_index)){
            Track track = tracks.get(real_index);
            player.startPlaying(track.getFilename());
            System.out.println("Now playing: " + track.getDisplayString());
        }

        System.out.println("");
    }

    public void stopTrack(){
        player.stopPlaying();
        System.out.println("");
    }

    public void readLibrary(String folderName){
        tracks = reader.readTracks(folderName);
    }

    public boolean indexValid(int index){
        return index >= 0 && index < tracks.size();
    }
}