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-rw-r--r--src/musichub/business/MusicHub.java329
1 files changed, 0 insertions, 329 deletions
diff --git a/src/musichub/business/MusicHub.java b/src/musichub/business/MusicHub.java
deleted file mode 100644
index 38e2214..0000000
--- a/src/musichub/business/MusicHub.java
+++ /dev/null
@@ -1,329 +0,0 @@
-package musichub.business;
-
-import musichub.util.XMLHandler;
-import org.w3c.dom.Document;
-import org.w3c.dom.Element;
-import org.w3c.dom.Node;
-import org.w3c.dom.NodeList;
-
-import java.util.*;
-
-class SortByDate implements Comparator<Album> {
- public int compare(Album a1, Album a2) {
- return a1.getDate().compareTo(a2.getDate());
- }
-}
-
-class SortByGenre implements Comparator<Song> {
- public int compare(Song s1, Song s2) {
- return s1.getGenre().compareTo(s2.getGenre());
- }
-}
-
-class SortByAuthor implements Comparator<AudioElement> {
- public int compare(AudioElement e1, AudioElement e2) {
- return e1.getArtist().compareTo(e2.getArtist());
- }
-}
-
-public class MusicHub {
- public static final String DIR = System.getProperty("user.dir");
- public static final String ALBUMS_FILE_PATH = DIR + "/files/albums.xml";
- public static final String PLAYLISTS_FILE_PATH = DIR + "/files/playlists.xml";
- public static final String ELEMENTS_FILE_PATH = DIR + "/files/elements.xml";
- private final List<Album> albums;
- private final List<PlayList> playlists;
- private final List<AudioElement> elements;
- private final XMLHandler xmlHandler = new XMLHandler();
-
- public MusicHub() {
- albums = new LinkedList<>();
- playlists = new LinkedList<>();
- elements = new LinkedList<>();
- this.loadElements();
- this.loadAlbums();
- this.loadPlaylists();
- }
-
- public void addElement(AudioElement element) {
- elements.add(element);
- }
-
- public void addAlbum(Album album) {
- albums.add(album);
- }
-
- public void addPlaylist(PlayList playlist) {
- playlists.add(playlist);
- }
-
- public void deletePlayList(String playListTitle) throws NoPlayListFoundException {
-
- PlayList thePlayList = null;
- boolean result = false;
- for (PlayList pl : playlists) {
- if (pl.getTitle().equalsIgnoreCase(playListTitle)) {
- thePlayList = pl;
- break;
- }
- }
-
- if (thePlayList != null)
- result = playlists.remove(thePlayList);
- if (!result) throw new NoPlayListFoundException("Playlist " + playListTitle + " not found!");
- }
-
- public Iterator<Album> albums() {
- return albums.listIterator();
- }
-
- public Iterator<PlayList> playlists() {
- return playlists.listIterator();
- }
-
- public Iterator<AudioElement> elements() {
- return elements.listIterator();
- }
-
- public String getAlbumsTitlesSortedByDate() {
- StringBuilder titleList = new StringBuilder();
- albums.sort(new SortByDate());
- for (Album al : albums)
- titleList.append(al.getTitle()).append("\n");
- return titleList.toString();
- }
-
- public String getAudiobooksTitlesSortedByAuthor() {
- StringBuilder titleList = new StringBuilder();
- List<AudioElement> audioBookList = new ArrayList<>();
- for (AudioElement ae : elements)
- if (ae instanceof AudioBook)
- audioBookList.add(ae);
- audioBookList.sort(new SortByAuthor());
- for (AudioElement ab : audioBookList)
- titleList.append(ab.getArtist()).append("\n");
- return titleList.toString();
- }
-
- public List<AudioElement> getAlbumSongs(String albumTitle) throws NoAlbumFoundException {
- Album theAlbum = null;
- ArrayList<AudioElement> songsInAlbum = new ArrayList<>();
- for (Album al : albums) {
- if (al.getTitle().equalsIgnoreCase(albumTitle)) {
- theAlbum = al;
- break;
- }
- }
- if (theAlbum == null) throw new NoAlbumFoundException("No album with this title in the MusicHub!");
-
- List<UUID> songIDs = theAlbum.getSongs();
- for (UUID id : songIDs)
- for (AudioElement el : elements) {
- if (el instanceof Song) {
- if (el.getUUID().equals(id)) songsInAlbum.add(el);
- }
- }
- return songsInAlbum;
-
- }
-
- public List<Song> getAlbumSongsSortedByGenre(String albumTitle) throws NoAlbumFoundException {
- Album theAlbum = null;
- ArrayList<Song> songsInAlbum = new ArrayList<>();
- for (Album al : albums) {
- if (al.getTitle().equalsIgnoreCase(albumTitle)) {
- theAlbum = al;
- break;
- }
- }
- if (theAlbum == null) throw new NoAlbumFoundException("No album with this title in the MusicHub!");
-
- List<UUID> songIDs = theAlbum.getSongs();
- for (UUID id : songIDs)
- for (AudioElement el : elements) {
- if (el instanceof Song) {
- if (el.getUUID().equals(id)) songsInAlbum.add((Song) el);
- }
- }
- songsInAlbum.sort(new SortByGenre());
- return songsInAlbum;
-
- }
-
- public void addElementToAlbum(String elementTitle, String albumTitle) throws NoAlbumFoundException, NoElementFoundException {
- Album theAlbum = null;
- int i;
- boolean found = false;
- for (i = 0; i < albums.size(); i++) {
- if (albums.get(i).getTitle().equalsIgnoreCase(albumTitle)) {
- theAlbum = albums.get(i);
- found = true;
- break;
- }
- }
-
- if (found) {
- AudioElement theElement = null;
- for (AudioElement ae : elements) {
- if (ae.getTitle().equalsIgnoreCase(elementTitle)) {
- theElement = ae;
- break;
- }
- }
- if (theElement != null) {
- theAlbum.addSong(theElement.getUUID());
- //replace the album in the list
- albums.set(i, theAlbum);
- } else throw new NoElementFoundException("Element " + elementTitle + " not found!");
- } else throw new NoAlbumFoundException("Album " + albumTitle + " not found!");
-
- }
-
- public void addElementToPlayList(String elementTitle, String playListTitle) throws NoPlayListFoundException, NoElementFoundException {
- PlayList thePlaylist = null;
- int i;
- boolean found = false;
-
- for (i = 0; i < playlists.size(); i++) {
- if (playlists.get(i).getTitle().equalsIgnoreCase(playListTitle)) {
- thePlaylist = playlists.get(i);
- found = true;
- break;
- }
- }
-
- if (found) {
- AudioElement theElement = null;
- for (AudioElement ae : elements) {
- if (ae.getTitle().equalsIgnoreCase(elementTitle)) {
- theElement = ae;
- break;
- }
- }
- if (theElement != null) {
- thePlaylist.addElement(theElement.getUUID());
- //replace the album in the list
- playlists.set(i, thePlaylist);
- } else throw new NoElementFoundException("Element " + elementTitle + " not found!");
-
- } else throw new NoPlayListFoundException("Playlist " + playListTitle + " not found!");
-
- }
-
- private void loadAlbums() {
- NodeList albumNodes = xmlHandler.parseXMLFile(ALBUMS_FILE_PATH);
- if (albumNodes == null) return;
-
- for (int i = 0; i < albumNodes.getLength(); i++) {
- if (albumNodes.item(i).getNodeType() == Node.ELEMENT_NODE) {
- Element albumElement = (Element) albumNodes.item(i);
- if (albumElement.getNodeName().equals("album")) {
- try {
- this.addAlbum(new Album(albumElement));
- } catch (Exception ex) {
- System.out.println("Something is wrong with the XML album element");
- }
- }
- }
- }
- }
-
- private void loadPlaylists() {
- NodeList playlistNodes = xmlHandler.parseXMLFile(PLAYLISTS_FILE_PATH);
- if (playlistNodes == null) return;
-
- for (int i = 0; i < playlistNodes.getLength(); i++) {
- if (playlistNodes.item(i).getNodeType() == Node.ELEMENT_NODE) {
- Element playlistElement = (Element) playlistNodes.item(i);
- if (playlistElement.getNodeName().equals("playlist")) {
- try {
- this.addPlaylist(new PlayList(playlistElement));
- } catch (Exception ex) {
- System.out.println("Something is wrong with the XML playlist element");
- }
- }
- }
- }
- }
-
- private void loadElements() {
- NodeList audioelementsNodes = xmlHandler.parseXMLFile(ELEMENTS_FILE_PATH);
- if (audioelementsNodes == null) return;
-
- for (int i = 0; i < audioelementsNodes.getLength(); i++) {
- if (audioelementsNodes.item(i).getNodeType() == Node.ELEMENT_NODE) {
- Element audioElement = (Element) audioelementsNodes.item(i);
- if (audioElement.getNodeName().equals("song")) {
- try {
- AudioElement newSong = new Song(audioElement);
- this.addElement(newSong);
- } catch (Exception ex) {
- System.out.println("Something is wrong with the XML song element");
- }
- }
- if (audioElement.getNodeName().equals("audiobook")) {
- try {
- AudioElement newAudioBook = new AudioBook(audioElement);
- this.addElement(newAudioBook);
- } catch (Exception ex) {
- System.out.println("Something is wrong with the XML audiobook element");
- }
- }
- }
- }
- }
-
-
- public void saveAlbums() {
- Document document = xmlHandler.createXMLDocument();
- if (document == null) return;
-
- // root element
- Element root = document.createElement("albums");
- document.appendChild(root);
-
- //save all albums
- for (Iterator<Album> albumsIter = this.albums(); albumsIter.hasNext(); ) {
- Album currentAlbum = albumsIter.next();
- currentAlbum.createXMLElement(document, root);
- }
- xmlHandler.createXMLFile(document, ALBUMS_FILE_PATH);
- }
-
- public void savePlayLists() {
- Document document = xmlHandler.createXMLDocument();
- if (document == null) return;
-
- // root element
- Element root = document.createElement("playlists");
- document.appendChild(root);
-
- //save all playlists
- for (Iterator<PlayList> playlistsIter = this.playlists(); playlistsIter.hasNext(); ) {
- PlayList currentPlayList = playlistsIter.next();
- currentPlayList.createXMLElement(document, root);
- }
- xmlHandler.createXMLFile(document, PLAYLISTS_FILE_PATH);
- }
-
- public void saveElements() {
- Document document = xmlHandler.createXMLDocument();
- if (document == null) return;
-
- // root element
- Element root = document.createElement("elements");
- document.appendChild(root);
-
- //save all AudioElements
- for (AudioElement currentElement : elements) {
-
- if (currentElement instanceof Song) {
- currentElement.createXMLElement(document, root);
- }
- if (currentElement instanceof AudioBook) {
- currentElement.createXMLElement(document, root);
- }
- }
- xmlHandler.createXMLFile(document, ELEMENTS_FILE_PATH);
- }
-} \ No newline at end of file
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-03 21:32:24 +0000