/*
- * Sone - Album.java - Copyright © 2011 David Roden
+ * Sone - Album.java - Copyright © 2011–2013 David Roden
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
package net.pterodactylus.sone.data;
+import static com.google.common.base.Preconditions.checkArgument;
+import static com.google.common.base.Preconditions.checkNotNull;
+import static com.google.common.base.Preconditions.checkState;
+import static java.util.Arrays.asList;
+
import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.HashMap;
import java.util.List;
+import java.util.Map;
import java.util.UUID;
+import com.google.common.base.Function;
+import com.google.common.base.Optional;
+import com.google.common.base.Predicate;
+import com.google.common.base.Predicates;
+import com.google.common.collect.Collections2;
+import com.google.common.collect.FluentIterable;
+import com.google.common.collect.ImmutableList;
+import com.google.common.hash.Hasher;
+import com.google.common.hash.Hashing;
+
/**
* Container for images that can also contain nested {@link Album}s.
*
* @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
*/
-public class Album {
+public class Album implements Fingerprintable {
+
+ /** Compares two {@link Album}s by {@link #getTitle()}. */
+ public static final Comparator<Album> TITLE_COMPARATOR = new Comparator<Album>() {
+
+ @Override
+ public int compare(Album leftAlbum, Album rightAlbum) {
+ return leftAlbum.getTitle().compareToIgnoreCase(rightAlbum.getTitle());
+ }
+ };
+
+ /** Function that flattens the given album and all albums beneath it. */
+ public static final Function<Album, List<Album>> FLATTENER = new Function<Album, List<Album>>() {
+
+ @Override
+ public List<Album> apply(Album album) {
+ List<Album> albums = new ArrayList<Album>();
+ albums.add(album);
+ for (Album subAlbum : album.getAlbums()) {
+ albums.addAll(FluentIterable.from(ImmutableList.of(subAlbum)).transformAndConcat(FLATTENER).toList());
+ }
+ return albums;
+ }
+ };
+
+ /** Function that transforms an album into the images it contains. */
+ public static final Function<Album, List<Image>> IMAGES = new Function<Album, List<Image>>() {
+
+ @Override
+ public List<Image> apply(Album album) {
+ return album.getImages();
+ }
+ };
+
+ /**
+ * Filter that removes all albums that do not have any images in any album
+ * below it.
+ */
+ public static final Predicate<Album> NOT_EMPTY = new Predicate<Album>() {
+
+ @Override
+ public boolean apply(Album album) {
+ return FluentIterable.from(asList(album)).transformAndConcat(FLATTENER).anyMatch(new Predicate<Album>() {
+
+ @Override
+ public boolean apply(Album album) {
+ return !album.getImages().isEmpty();
+ }
+ });
+ }
+ };
/** The ID of this album. */
private final String id;
/** The Sone this album belongs to. */
- private final Sone sone;
+ private Sone sone;
/** Nested albums. */
private final List<Album> albums = new ArrayList<Album>();
+ /** The image IDs in order. */
+ private final List<String> imageIds = new ArrayList<String>();
+
/** The images in this album. */
- private final List<Image> images = new ArrayList<Image>();
+ private final Map<String, Image> images = new HashMap<String, Image>();
- /** The name of this album. */
- private String name;
+ /** The parent album. */
+ private Album parent;
+
+ /** The title of this album. */
+ private String title;
/** The description of this album. */
private String description;
+ /** The ID of the album picture. */
+ private String albumImage;
+
/**
* Creates a new album with a random ID.
- *
- * @param sone
- * The Sone this album belongs to
*/
- public Album(Sone sone) {
- this(UUID.randomUUID().toString(), sone);
+ public Album() {
+ this(UUID.randomUUID().toString());
}
/**
*
* @param id
* The ID of the album
- * @param sone
- * The Sone this album belongs to
*/
- public Album(String id, Sone sone) {
- this.id = id;
- this.sone = sone;
+ public Album(String id) {
+ this.id = checkNotNull(id, "id must not be null");
}
//
}
/**
+ * Sets the owner of the album. The owner can only be set as long as the
+ * current owner is {@code null}.
+ *
+ * @param sone
+ * The album owner
+ * @return This album
+ */
+ public Album setSone(Sone sone) {
+ checkNotNull(sone, "sone must not be null");
+ checkState((this.sone == null) || (this.sone.equals(sone)), "album owner must not already be set to some other Sone");
+ this.sone = sone;
+ return this;
+ }
+
+ /**
* Returns the nested albums.
*
* @return The nested albums
*/
- public List<Album> getNestedAlbums() {
+ public List<Album> getAlbums() {
return new ArrayList<Album>(albums);
}
/**
+ * Adds an album to this album.
+ *
+ * @param album
+ * The album to add
+ */
+ public void addAlbum(Album album) {
+ checkNotNull(album, "album must not be null");
+ checkArgument(album.getSone().equals(sone), "album must belong to the same Sone as this album");
+ album.setParent(this);
+ if (!albums.contains(album)) {
+ albums.add(album);
+ }
+ }
+
+ /**
+ * Removes an album from this album.
+ *
+ * @param album
+ * The album to remove
+ */
+ public void removeAlbum(Album album) {
+ checkNotNull(album, "album must not be null");
+ checkArgument(album.sone.equals(sone), "album must belong this album’s Sone");
+ checkArgument(equals(album.parent), "album must belong to this album");
+ albums.remove(album);
+ album.removeParent();
+ }
+
+ /**
+ * Moves the given album up in this album’s albums. If the album is already
+ * the first album, nothing happens.
+ *
+ * @param album
+ * The album to move up
+ * @return The album that the given album swapped the place with, or
+ * <code>null</code> if the album did not change its place
+ */
+ public Album moveAlbumUp(Album album) {
+ checkNotNull(album, "album must not be null");
+ checkArgument(album.sone.equals(sone), "album must belong to the same Sone as this album");
+ checkArgument(equals(album.parent), "album must belong to this album");
+ int oldIndex = albums.indexOf(album);
+ if (oldIndex <= 0) {
+ return null;
+ }
+ albums.remove(oldIndex);
+ albums.add(oldIndex - 1, album);
+ return albums.get(oldIndex);
+ }
+
+ /**
+ * Moves the given album down in this album’s albums. If the album is
+ * already the last album, nothing happens.
+ *
+ * @param album
+ * The album to move down
+ * @return The album that the given album swapped the place with, or
+ * <code>null</code> if the album did not change its place
+ */
+ public Album moveAlbumDown(Album album) {
+ checkNotNull(album, "album must not be null");
+ checkArgument(album.sone.equals(sone), "album must belong to the same Sone as this album");
+ checkArgument(equals(album.parent), "album must belong to this album");
+ int oldIndex = albums.indexOf(album);
+ if ((oldIndex < 0) || (oldIndex >= (albums.size() - 1))) {
+ return null;
+ }
+ albums.remove(oldIndex);
+ albums.add(oldIndex + 1, album);
+ return albums.get(oldIndex);
+ }
+
+ /**
* Returns the images in this album.
*
* @return The images in this album
*/
public List<Image> getImages() {
- return new ArrayList<Image>(images);
+ return new ArrayList<Image>(Collections2.filter(Collections2.transform(imageIds, new Function<String, Image>() {
+
+ @Override
+ @SuppressWarnings("synthetic-access")
+ public Image apply(String imageId) {
+ return images.get(imageId);
+ }
+ }), Predicates.notNull()));
+ }
+
+ /**
+ * Adds the given image to this album.
+ *
+ * @param image
+ * The image to add
+ */
+ public void addImage(Image image) {
+ checkNotNull(image, "image must not be null");
+ checkNotNull(image.getSone(), "image must have an owner");
+ checkArgument(image.getSone().equals(sone), "image must belong to the same Sone as this album");
+ if (image.getAlbum() != null) {
+ image.getAlbum().removeImage(image);
+ }
+ image.setAlbum(this);
+ if (imageIds.isEmpty() && (albumImage == null)) {
+ albumImage = image.getId();
+ }
+ if (!imageIds.contains(image.getId())) {
+ imageIds.add(image.getId());
+ images.put(image.getId(), image);
+ }
+ }
+
+ /**
+ * Removes the given image from this album.
+ *
+ * @param image
+ * The image to remove
+ */
+ public void removeImage(Image image) {
+ checkNotNull(image, "image must not be null");
+ checkNotNull(image.getSone(), "image must have an owner");
+ checkArgument(image.getSone().equals(sone), "image must belong to the same Sone as this album");
+ imageIds.remove(image.getId());
+ images.remove(image.getId());
+ if (image.getId().equals(albumImage)) {
+ if (images.isEmpty()) {
+ albumImage = null;
+ } else {
+ albumImage = images.values().iterator().next().getId();
+ }
+ }
}
/**
- * Returns the name of this album.
+ * Moves the given image up in this album’s images. If the image is already
+ * the first image, nothing happens.
*
- * @return The name of this album
+ * @param image
+ * The image to move up
+ * @return The image that the given image swapped the place with, or
+ * <code>null</code> if the image did not change its place
*/
- public String getName() {
- return name;
+ public Image moveImageUp(Image image) {
+ checkNotNull(image, "image must not be null");
+ checkNotNull(image.getSone(), "image must have an owner");
+ checkArgument(image.getSone().equals(sone), "image must belong to the same Sone as this album");
+ checkArgument(image.getAlbum().equals(this), "image must belong to this album");
+ int oldIndex = imageIds.indexOf(image.getId());
+ if (oldIndex <= 0) {
+ return null;
+ }
+ imageIds.remove(image.getId());
+ imageIds.add(oldIndex - 1, image.getId());
+ return images.get(imageIds.get(oldIndex));
+ }
+
+ /**
+ * Moves the given image down in this album’s images. If the image is
+ * already the last image, nothing happens.
+ *
+ * @param image
+ * The image to move down
+ * @return The image that the given image swapped the place with, or
+ * <code>null</code> if the image did not change its place
+ */
+ public Image moveImageDown(Image image) {
+ checkNotNull(image, "image must not be null");
+ checkNotNull(image.getSone(), "image must have an owner");
+ checkArgument(image.getSone().equals(sone), "image must belong to the same Sone as this album");
+ checkArgument(image.getAlbum().equals(this), "image must belong to this album");
+ int oldIndex = imageIds.indexOf(image.getId());
+ if ((oldIndex == -1) || (oldIndex >= (imageIds.size() - 1))) {
+ return null;
+ }
+ imageIds.remove(image.getId());
+ imageIds.add(oldIndex + 1, image.getId());
+ return images.get(imageIds.get(oldIndex));
+ }
+
+ /**
+ * Returns the album image of this album, or {@code null} if no album image
+ * has been set.
+ *
+ * @return The image to show when this album is listed
+ */
+ public Image getAlbumImage() {
+ if (albumImage == null) {
+ return null;
+ }
+ return Optional.fromNullable(images.get(albumImage)).or(images.values().iterator().next());
+ }
+
+ /**
+ * Sets the ID of the album image.
+ *
+ * @param id
+ * The ID of the album image
+ * @return This album
+ */
+ public Album setAlbumImage(String id) {
+ this.albumImage = id;
+ return this;
+ }
+
+ /**
+ * Returns whether this album contains any other albums or images.
+ *
+ * @return {@code true} if this album is empty, {@code false} otherwise
+ */
+ public boolean isEmpty() {
+ return albums.isEmpty() && images.isEmpty();
+ }
+
+ /**
+ * Returns the parent album of this album.
+ *
+ * @return The parent album of this album, or {@code null} if this album
+ * does not have a parent
+ */
+ public Album getParent() {
+ return parent;
}
/**
- * Sets the name of this album.
+ * Sets the parent album of this album.
*
- * @param name
- * The name of this album
+ * @param parent
+ * The new parent album of this album
* @return This album
*/
- public Album setName(String name) {
- this.name = name;
+ protected Album setParent(Album parent) {
+ this.parent = checkNotNull(parent, "parent must not be null");
+ return this;
+ }
+
+ /**
+ * Removes the parent album of this album.
+ *
+ * @return This album
+ */
+ protected Album removeParent() {
+ this.parent = null;
+ return this;
+ }
+
+ /**
+ * Returns the title of this album.
+ *
+ * @return The title of this album
+ */
+ public String getTitle() {
+ return title;
+ }
+
+ /**
+ * Sets the title of this album.
+ *
+ * @param title
+ * The title of this album
+ * @return This album
+ */
+ public Album setTitle(String title) {
+ this.title = checkNotNull(title, "title must not be null");
return this;
}
* @return This album
*/
public Album setDescription(String description) {
- this.description = description;
+ this.description = checkNotNull(description, "description must not be null");
return this;
}
//
+ // FINGERPRINTABLE METHODS
+ //
+
+ /**
+ * {@inheritDoc}
+ */
+ @Override
+ public String getFingerprint() {
+ Hasher hash = Hashing.sha256().newHasher();
+ hash.putString("Album(");
+ hash.putString("ID(").putString(id).putString(")");
+ hash.putString("Title(").putString(title).putString(")");
+ hash.putString("Description(").putString(description).putString(")");
+ if (albumImage != null) {
+ hash.putString("AlbumImage(").putString(albumImage).putString(")");
+ }
+
+ /* add nested albums. */
+ hash.putString("Albums(");
+ for (Album album : albums) {
+ hash.putString(album.getFingerprint());
+ }
+ hash.putString(")");
+
+ /* add images. */
+ hash.putString("Images(");
+ for (Image image : getImages()) {
+ if (image.isInserted()) {
+ hash.putString(image.getFingerprint());
+ }
+ }
+ hash.putString(")");
+
+ hash.putString(")");
+ return hash.hash().toString();
+ }
+
+ //
// OBJECT METHODS
//
* {@inheritDoc}
*/
@Override
+ public int hashCode() {
+ return id.hashCode();
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ @Override
public boolean equals(Object object) {
if (!(object instanceof Album)) {
return false;
}
Album album = (Album) object;
- return sone.equals(album.sone) && id.equals(album.id);
+ return id.equals(album.id);
}
}
projects / Sone.git / blobdiff