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Diffstat (limited to 'subsonic-main/src/main/java/net/sourceforge/subsonic/domain/PlayQueue.java')
| -rw-r--r-- | subsonic-main/src/main/java/net/sourceforge/subsonic/domain/PlayQueue.java | 417 |
1 files changed, 417 insertions, 0 deletions
diff --git a/subsonic-main/src/main/java/net/sourceforge/subsonic/domain/PlayQueue.java b/subsonic-main/src/main/java/net/sourceforge/subsonic/domain/PlayQueue.java new file mode 100644 index 00000000..97748f72 --- /dev/null +++ b/subsonic-main/src/main/java/net/sourceforge/subsonic/domain/PlayQueue.java @@ -0,0 +1,417 @@ +/* + This file is part of Subsonic. + + Subsonic is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Subsonic is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with Subsonic. If not, see <http://www.gnu.org/licenses/>. + + Copyright 2009 (C) Sindre Mehus + */ +package net.sourceforge.subsonic.domain; + +import net.sourceforge.subsonic.util.FileUtil; +import org.apache.commons.lang.StringUtils; + +import java.io.IOException; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.Collections; +import java.util.Comparator; +import java.util.List; + +/** + * A playlist is a list of music files that are associated to a remote player. + * + * @author Sindre Mehus + */ +public class PlayQueue { + + private List<MediaFile> files = new ArrayList<MediaFile>(); + private boolean repeatEnabled; + private String name = "(unnamed)"; + private Status status = Status.PLAYING; + private RandomSearchCriteria randomSearchCriteria; + + /** + * The index of the current song, or -1 is the end of the playlist is reached. + * Note that both the index and the playlist size can be zero. + */ + private int index = 0; + + /** + * Used for undo functionality. + */ + private List<MediaFile> filesBackup = new ArrayList<MediaFile>(); + private int indexBackup = 0; + + /** + * Returns the user-defined name of the playlist. + * + * @return The name of the playlist, or <code>null</code> if no name has been assigned. + */ + public synchronized String getName() { + return name; + } + + /** + * Sets the user-defined name of the playlist. + * + * @param name The name of the playlist. + */ + public synchronized void setName(String name) { + this.name = name; + } + + /** + * Returns the current song in the playlist. + * + * @return The current song in the playlist, or <code>null</code> if no current song exists. + */ + public synchronized MediaFile getCurrentFile() { + if (index == -1 || index == 0 && size() == 0) { + setStatus(Status.STOPPED); + return null; + } else { + MediaFile file = files.get(index); + + // Remove file from playlist if it doesn't exist. + if (!file.exists()) { + files.remove(index); + index = Math.max(0, Math.min(index, size() - 1)); + return getCurrentFile(); + } + + return file; + } + } + + /** + * Returns all music files in the playlist. + * + * @return All music files in the playlist. + */ + public synchronized List<MediaFile> getFiles() { + return files; + } + + /** + * Returns the music file at the given index. + * + * @param index The index. + * @return The music file at the given index. + * @throws IndexOutOfBoundsException If the index is out of range. + */ + public synchronized MediaFile getFile(int index) { + return files.get(index); + } + + /** + * Skip to the next song in the playlist. + */ + public synchronized void next() { + index++; + + // Reached the end? + if (index >= size()) { + index = isRepeatEnabled() ? 0 : -1; + } + } + + /** + * Returns the number of songs in the playlists. + * + * @return The number of songs in the playlists. + */ + public synchronized int size() { + return files.size(); + } + + /** + * Returns whether the playlist is empty. + * + * @return Whether the playlist is empty. + */ + public synchronized boolean isEmpty() { + return files.isEmpty(); + } + + /** + * Returns the index of the current song. + * + * @return The index of the current song, or -1 if the end of the playlist is reached. + */ + public synchronized int getIndex() { + return index; + } + + /** + * Sets the index of the current song. + * + * @param index The index of the current song. + */ + public synchronized void setIndex(int index) { + makeBackup(); + this.index = Math.max(0, Math.min(index, size() - 1)); + setStatus(Status.PLAYING); + } + + /** + * Adds one or more music file to the playlist. + * + * @param append Whether existing songs in the playlist should be kept. + * @param mediaFiles The music files to add. + * @throws IOException If an I/O error occurs. + */ + public synchronized void addFiles(boolean append, Iterable<MediaFile> mediaFiles) throws IOException { + makeBackup(); + if (!append) { + index = 0; + files.clear(); + } + for (MediaFile mediaFile : mediaFiles) { + files.add(mediaFile); + } + setStatus(Status.PLAYING); + } + + /** + * Convenience method, equivalent to {@link #addFiles(boolean, Iterable)}. + */ + public synchronized void addFiles(boolean append, MediaFile... mediaFiles) throws IOException { + addFiles(append, Arrays.asList(mediaFiles)); + } + + /** + * Removes the music file at the given index. + * + * @param index The playlist index. + */ + public synchronized void removeFileAt(int index) { + makeBackup(); + index = Math.max(0, Math.min(index, size() - 1)); + if (this.index > index) { + this.index--; + } + files.remove(index); + + if (index != -1) { + this.index = Math.max(0, Math.min(this.index, size() - 1)); + } + } + + /** + * Clears the playlist. + */ + public synchronized void clear() { + makeBackup(); + files.clear(); + index = 0; + } + + /** + * Shuffles the playlist. + */ + public synchronized void shuffle() { + makeBackup(); + MediaFile currentFile = getCurrentFile(); + Collections.shuffle(files); + if (currentFile != null) { + index = files.indexOf(currentFile); + } + } + + /** + * Sorts the playlist according to the given sort order. + */ + public synchronized void sort(final SortOrder sortOrder) { + makeBackup(); + MediaFile currentFile = getCurrentFile(); + + Comparator<MediaFile> comparator = new Comparator<MediaFile>() { + public int compare(MediaFile a, MediaFile b) { + switch (sortOrder) { + case TRACK: + Integer trackA = a.getTrackNumber(); + Integer trackB = b.getTrackNumber(); + if (trackA == null) { + trackA = 0; + } + if (trackB == null) { + trackB = 0; + } + return trackA.compareTo(trackB); + + case ARTIST: + String artistA = StringUtils.trimToEmpty(a.getArtist()); + String artistB = StringUtils.trimToEmpty(b.getArtist()); + return artistA.compareTo(artistB); + + case ALBUM: + String albumA = StringUtils.trimToEmpty(a.getAlbumName()); + String albumB = StringUtils.trimToEmpty(b.getAlbumName()); + return albumA.compareTo(albumB); + default: + return 0; + } + } + }; + + Collections.sort(files, comparator); + if (currentFile != null) { + index = files.indexOf(currentFile); + } + } + + /** + * Moves the song at the given index one step up. + * + * @param index The playlist index. + */ + public synchronized void moveUp(int index) { + makeBackup(); + if (index <= 0 || index >= size()) { + return; + } + Collections.swap(files, index, index - 1); + + if (this.index == index) { + this.index--; + } else if (this.index == index - 1) { + this.index++; + } + } + + /** + * Moves the song at the given index one step down. + * + * @param index The playlist index. + */ + public synchronized void moveDown(int index) { + makeBackup(); + if (index < 0 || index >= size() - 1) { + return; + } + Collections.swap(files, index, index + 1); + + if (this.index == index) { + this.index++; + } else if (this.index == index + 1) { + this.index--; + } + } + + /** + * Returns whether the playlist is repeating. + * + * @return Whether the playlist is repeating. + */ + public synchronized boolean isRepeatEnabled() { + return repeatEnabled; + } + + /** + * Sets whether the playlist is repeating. + * + * @param repeatEnabled Whether the playlist is repeating. + */ + public synchronized void setRepeatEnabled(boolean repeatEnabled) { + this.repeatEnabled = repeatEnabled; + } + + /** + * Revert the last operation. + */ + public synchronized void undo() { + List<MediaFile> filesTmp = new ArrayList<MediaFile>(files); + int indexTmp = index; + + index = indexBackup; + files = filesBackup; + + indexBackup = indexTmp; + filesBackup = filesTmp; + } + + /** + * Returns the playlist status. + * + * @return The playlist status. + */ + public synchronized Status getStatus() { + return status; + } + + /** + * Sets the playlist status. + * + * @param status The playlist status. + */ + public synchronized void setStatus(Status status) { + this.status = status; + if (index == -1) { + index = Math.max(0, Math.min(index, size() - 1)); + } + } + + /** + * Returns the criteria used to generate this random playlist. + * + * @return The search criteria, or <code>null</code> if this is not a random playlist. + */ + public synchronized RandomSearchCriteria getRandomSearchCriteria() { + return randomSearchCriteria; + } + + /** + * Sets the criteria used to generate this random playlist. + * + * @param randomSearchCriteria The search criteria, or <code>null</code> if this is not a random playlist. + */ + public synchronized void setRandomSearchCriteria(RandomSearchCriteria randomSearchCriteria) { + this.randomSearchCriteria = randomSearchCriteria; + } + + /** + * Returns the total length in bytes. + * + * @return The total length in bytes. + */ + public synchronized long length() { + long length = 0; + for (MediaFile mediaFile : files) { + length += mediaFile.getFileSize(); + } + return length; + } + + private void makeBackup() { + filesBackup = new ArrayList<MediaFile>(files); + indexBackup = index; + } + + /** + * Playlist status. + */ + public enum Status { + PLAYING, + STOPPED + } + + /** + * Playlist sort order. + */ + public enum SortOrder { + TRACK, + ARTIST, + ALBUM + } +}
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