+/*
+ * 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
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package net.pterodactylus.sone.data.impl;
+
+import static com.google.common.base.Optional.absent;
+import static com.google.common.base.Optional.fromNullable;
+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 java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+
+import net.pterodactylus.sone.data.Album;
+import net.pterodactylus.sone.data.Image;
+import net.pterodactylus.sone.data.Sone;
+
+import com.google.common.base.Function;
+import com.google.common.base.Optional;
+import com.google.common.base.Predicates;
+import com.google.common.collect.Collections2;
+import com.google.common.hash.Hasher;
+import com.google.common.hash.Hashing;
+
+/**
+ * Container for images that can also contain nested {@link AlbumImpl}s.
+ *
+ * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+ */
+public class AlbumImpl implements Album {
+
+ /** The ID of this album. */
+ private final String id;
+
+ /** The Sone this album belongs to. */
+ private final 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 Map<String, Image> images = new HashMap<String, Image>();
+
+ /** 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. */
+ public AlbumImpl(Sone sone) {
+ this(sone, UUID.randomUUID().toString());
+ }
+
+ /**
+ * Creates a new album with the given ID.
+ *
+ * @param id
+ * The ID of the album
+ */
+ public AlbumImpl(Sone sone, String id) {
+ this.sone = checkNotNull(sone, "Sone must not be null");
+ this.id = checkNotNull(id, "id must not be null");
+ }
+
+ //
+ // ACCESSORS
+ //
+
+ @Override
+ public String getId() {
+ return id;
+ }
+
+ @Override
+ public Sone getSone() {
+ return sone;
+ }
+
+ @Override
+ public List<Album> getAlbums() {
+ return new ArrayList<Album>(albums);
+ }
+
+ @Override
+ 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);
+ }
+ }
+
+ @Override
+ public void removeAlbum(Album album) {
+ checkNotNull(album, "album must not be null");
+ checkArgument(album.getSone().equals(sone), "album must belong this album’s Sone");
+ checkArgument(equals(album.getParent()), "album must belong to this album");
+ albums.remove(album);
+ album.removeParent();
+ }
+
+ @Override
+ public Album moveAlbumUp(Album album) {
+ checkNotNull(album, "album must not be null");
+ checkArgument(album.getSone().equals(sone), "album must belong to the same Sone as this album");
+ checkArgument(equals(album.getParent()), "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);
+ }
+
+ @Override
+ public Album moveAlbumDown(Album album) {
+ checkNotNull(album, "album must not be null");
+ checkArgument(album.getSone().equals(sone), "album must belong to the same Sone as this album");
+ checkArgument(equals(album.getParent()), "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);
+ }
+
+ @Override
+ public List<Image> getImages() {
+ 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()));
+ }
+
+ @Override
+ 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);
+ }
+ }
+
+ @Override
+ 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();
+ }
+ }
+ }
+
+ @Override
+ 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));
+ }
+
+ @Override
+ 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));
+ }
+
+ @Override
+ public Image getAlbumImage() {
+ if (albumImage == null) {
+ return null;
+ }
+ return Optional.fromNullable(images.get(albumImage)).or(images.values().iterator().next());
+ }
+
+ @Override
+ public boolean isEmpty() {
+ return albums.isEmpty() && images.isEmpty();
+ }
+
+ @Override
+ public boolean isRoot() {
+ return parent == null;
+ }
+
+ @Override
+ public Album getParent() {
+ return parent;
+ }
+
+ @Override
+ public Album setParent(Album parent) {
+ this.parent = checkNotNull(parent, "parent must not be null");
+ return this;
+ }
+
+ @Override
+ public Album removeParent() {
+ this.parent = null;
+ return this;
+ }
+
+ @Override
+ public String getTitle() {
+ return title;
+ }
+
+ @Override
+ public String getDescription() {
+ return description;
+ }
+
+ @Override
+ public Modifier modify() throws IllegalStateException {
+ // TODO: reenable check for local Sones
+ return new Modifier() {
+ private Optional<String> title = absent();
+
+ private Optional<String> description = absent();
+
+ private Optional<String> albumImage = absent();
+
+ @Override
+ public Modifier setTitle(String title) {
+ this.title = fromNullable(title);
+ return this;
+ }
+
+ @Override
+ public Modifier setDescription(String description) {
+ this.description = fromNullable(description);
+ return this;
+ }
+
+ @Override
+ public Modifier setAlbumImage(String imageId) {
+ this.albumImage = fromNullable(imageId);
+ return this;
+ }
+
+ @Override
+ public Album update() throws IllegalStateException {
+ if (title.isPresent() && title.get().trim().isEmpty()) {
+ throw new AlbumTitleMustNotBeEmpty();
+ }
+ if (title.isPresent()) {
+ AlbumImpl.this.title = title.get();
+ }
+ if (description.isPresent()) {
+ AlbumImpl.this.description = description.get();
+ }
+ if (albumImage.isPresent()) {
+ AlbumImpl.this.albumImage = albumImage.get();
+ }
+ return AlbumImpl.this;
+ }
+ };
+ }
+
+ public static class AlbumTitleMustNotBeEmpty extends IllegalStateException { }
+
+ //
+ // FINGERPRINTABLE METHODS
+ //
+
+ @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
+ //
+
+ @Override
+ public int hashCode() {
+ return id.hashCode();
+ }
+
+ @Override
+ public boolean equals(Object object) {
+ if (!(object instanceof AlbumImpl)) {
+ return false;
+ }
+ AlbumImpl album = (AlbumImpl) object;
+ return id.equals(album.id);
+ }
+
+}
projects / Sone.git / commitdiff