Main.java

package musichub.main;

import musichub.business.*;
import musichub.util.LogHandler;

import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.UnsupportedAudioFileException;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;
import java.util.Scanner;

import static musichub.util.PathValidation.isPathValid;

public class Main {
    public static void main(String[] args) throws UnsupportedAudioFileException, IOException, LineUnavailableException {

        MusicHub theHub = new MusicHub();

        System.out.println("Type h for available commands");


        Scanner scan = new Scanner(System.in);
        String choice = scan.nextLine();

        String albumTitle;

        if (choice.length() == 0) System.exit(0);

        while (!choice.equals("")) { //if the user puts nothing, quit the loop/system
            switch (choice.charAt(0)) {
                case 'q': //added the option directly in the switch instead of the loop
                    System.exit(0);
                case 'h':
                    printAvailableCommands();
                    choice = scan.nextLine();
                    break;
                case 't':
                    //album titles, ordered by date
                    System.out.println(theHub.getAlbumsTitlesSortedByDate());
                    printAvailableCommands();
                    choice = scan.nextLine();
                    break;
                case 'g':
                    //songs of an album, sorted by genre
                    System.out.println("Songs of an album sorted by genre will be displayed; enter the album name, available albums are:");
                    System.out.println(theHub.getAlbumsTitlesSortedByDate());

                    albumTitle = scan.nextLine();
                    try {
                    	List<Song> songs = theHub.getAlbumSongsSortedByGenre(albumTitle);
                        System.out.println(songs);
                    } catch (NoAlbumFoundException ex) {
                        System.out.println("No album found with the requested title " + ex.getMessage());
                    }
                    printAvailableCommands();
                    choice = scan.nextLine();
                    break;
                case 'd':
                    //songs of an album
                    System.out.println("Songs of an album will be displayed; enter the album name, available albums are:");
                    System.out.println(theHub.getAlbumsTitlesSortedByDate());

                    albumTitle = scan.nextLine();
                    try {
                    	List<AudioElement> songs = theHub.getAlbumSongs(albumTitle);
                        System.out.println(theHub.getAlbumSongs(albumTitle));
                        String song = scan.nextLine();
                        theHub.getAudioElement(songs, song);
                    } catch (NoAlbumFoundException ex) {
                        System.out.println("No album found with the requested title " + ex.getMessage());
                    }
                    printAvailableCommands();
                    choice = scan.nextLine();
                    break;
                case 'u':
                    //audiobooks ordered by author
                    System.out.println(theHub.getAudiobooksTitlesSortedByAuthor());
                    printAvailableCommands();
                    choice = scan.nextLine();
                    break;
                case 'c':
                    // add a new song
                    System.out.println("Enter a new song: ");
                    System.out.println("Song title: ");
                    String title = scan.nextLine();
                    System.out.println("Song genre (jazz, classic, hiphop, rock, pop, rap):");
                    String genre = scan.nextLine();
                    System.out.println("Song artist: ");
                    String artist = scan.nextLine();
                    System.out.println("Song length in seconds: ");
                    int length = Integer.parseInt(scan.nextLine());

                    System.out.println("Song content: ");
                    String content = scan.nextLine();
                    if (!isPathValid(content)) {
                        String logMsg = "The music file was not found with the path you've provided.";
                        LogHandler.write(logMsg, "WARNING"); //write a line in the log file
                        System.out.println(logMsg + "\nType h for available commands");
                        choice = scan.nextLine();
                        break;
                    }

                    Song s = new Song(title, artist, length, content, genre);
                    theHub.addElement(s);
                    System.out.println("New element list: ");
                    Iterator<AudioElement> it = theHub.elements();
                    while (it.hasNext()) System.out.println(it.next().getTitle());
                    System.out.println("Song created!");
                    printAvailableCommands();
                    choice = scan.nextLine();
                    break;
                case 'a':
                    // add a new album
                    System.out.println("Enter a new album: ");
                    System.out.println("Album title: ");
                    String aTitle = scan.nextLine();
                    System.out.println("Album artist: ");
                    String aArtist = scan.nextLine();
                    System.out.println("Album length in seconds: ");
                    int aLength = Integer.parseInt(scan.nextLine());
                    System.out.println("Album date as YYYY-DD-MM: ");
                    String aDate = scan.nextLine();
                    Album a = new Album(aTitle, aArtist, aLength, aDate);
                    theHub.addAlbum(a);
                    System.out.println("New list of albums: ");
                    Iterator<Album> ita = theHub.albums();
                    while (ita.hasNext()) System.out.println(ita.next().getTitle());
                    System.out.println("Album created!");
                    printAvailableCommands();
                    choice = scan.nextLine();
                    break;
                case '+':
                    //add a song to an album:
                    System.out.println("Add an existing song to an existing album");
                    System.out.println("Type the name of the song you wish to add. Available songs: ");
                    Iterator<AudioElement> itae = theHub.elements();
                    while (itae.hasNext()) {
                        AudioElement ae = itae.next();
                        if (ae instanceof Song) System.out.println(ae.getTitle());
                    }
                    String songTitle = scan.nextLine();

                    System.out.println("Type the name of the album you wish to enrich. Available albums: ");
                    Iterator<Album> ait = theHub.albums();
                    while (ait.hasNext()) {
                        Album al = ait.next();
                        System.out.println(al.getTitle());
                    }
                    String titleAlbum = scan.nextLine();
                    try {
                        theHub.addElementToAlbum(songTitle, titleAlbum);
                    } catch (NoAlbumFoundException | NoElementFoundException ex) {
                        System.out.println(ex.getMessage());
                    }
                    System.out.println("Song added to the album!");
                    printAvailableCommands();
                    choice = scan.nextLine();
                    break;
                case 'l':
                    // add a new audiobook
                    System.out.println("Enter a new audiobook: ");
                    System.out.println("AudioBook title: ");
                    String bTitle = scan.nextLine();
                    System.out.println("AudioBook category (youth, novel, theater, documentary, speech)");
                    String bCategory = scan.nextLine();
                    System.out.println("AudioBook artist: ");
                    String bArtist = scan.nextLine();
                    System.out.println("AudioBook length in seconds: ");
                    int bLength = Integer.parseInt(scan.nextLine());
                    System.out.println("AudioBook content: ");
                    String bContent = scan.nextLine();
                    System.out.println("AudioBook language (french, english, italian, spanish, german)");
                    String bLanguage = scan.nextLine();
                    AudioBook b = new AudioBook(bTitle, bArtist, bLength, bContent, bLanguage, bCategory);
                    theHub.addElement(b);
                    System.out.println("Audiobook created! New element list: ");
                    Iterator<AudioElement> itl = theHub.elements();
                    while (itl.hasNext()) System.out.println(itl.next().getTitle());
                    printAvailableCommands();
                    choice = scan.nextLine();
                    break;
                case 'p':
                    //create a new playlist from existing elements
                    System.out.println("Add an existing song or audiobook to a new playlist");
                    System.out.println("Existing playlists:");
                    Iterator<PlayList> itpl = theHub.playlists();
                    while (itpl.hasNext()) {
                        PlayList pl = itpl.next();
                        System.out.println(pl.getTitle());
                    }
                    System.out.println("Type the name of the playlist you wish to create:");
                    String playListTitle = scan.nextLine();
                    PlayList pl = new PlayList(playListTitle);
                    theHub.addPlaylist(pl);
                    System.out.println("Available elements: ");

                    Iterator<AudioElement> itael = theHub.elements();
                    while (itael.hasNext()) {
                        AudioElement ae = itael.next();
                        System.out.println(ae.getTitle());
                    }
                    while (choice.charAt(0) != 'n') {
                        System.out.println("Type the name of the audio element you wish to add or 'n' to exit:");
                        String elementTitle = scan.nextLine();
                        try {
                            theHub.addElementToPlayList(elementTitle, playListTitle);
                        } catch (NoPlayListFoundException | NoElementFoundException ex) {
                            System.out.println(ex.getMessage());
                        }

                        System.out.println("Type y to add a new one, n to end");
                        choice = scan.nextLine();
                    }
                    System.out.println("Playlist created!");
                    printAvailableCommands();
                    choice = scan.nextLine();
                    break;
                case '-':
                    //delete a playlist
                    System.out.println("Delete an existing playlist. Available playlists:");
                    Iterator<PlayList> itp = theHub.playlists();
                    while (itp.hasNext()) {
                        PlayList p = itp.next();
                        System.out.println(p.getTitle());
                    }
                    String plTitle = scan.nextLine();
                    try {
                        theHub.deletePlayList(plTitle);
                    } catch (NoPlayListFoundException ex) {
                        System.out.println(ex.getMessage());
                    }
                    System.out.println("Playlist deleted!");
                    printAvailableCommands();
                    choice = scan.nextLine();
                    break;
                case 's':
                    //save elements, albums, playlists
                    theHub.saveElements();
                    theHub.saveAlbums();
                    theHub.savePlayLists();
                    System.out.println("Elements, albums and playlists saved!");
                    printAvailableCommands();
                    choice = scan.nextLine();
                    break;
                case 'o':
                    //consult the app logs
                    LogHandler.read();
                    System.out.println("Type h for available commands");
                    choice = scan.nextLine();
                    break;
                default:

                    break;
            }
        }
        scan.close();
    }

    private static void printAvailableCommands() {
        System.out.println("t: display the album titles, ordered by date");
        System.out.println("g: display songs of an album, ordered by genre");
        System.out.println("d: display songs of an album");
        System.out.println("u: display audiobooks ordered by author");
        System.out.println("c: add a new song");
        System.out.println("a: add a new album");
        System.out.println("+: add a song to an album");
        System.out.println("l: add a new audiobook");
        System.out.println("p: create a new playlist from existing songs and audio books");
        System.out.println("-: delete an existing playlist");
        System.out.println("s: save elements, albums, playlists");
        System.out.println("o: consult the app logs");
        System.out.println("q: quit program");
    }
}