/*
* Sone - ImageImpl.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;
import static com.google.common.base.Optional.absent;
import static com.google.common.base.Optional.fromNullable;
import static com.google.common.base.Optional.of;
import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.base.Preconditions.checkState;
import java.util.UUID;
import com.google.common.base.Optional;
import com.google.common.hash.Hasher;
import com.google.common.hash.Hashing;
/**
* Container for image metadata.
*
* @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
*/
public class ImageImpl implements Image {
/** The ID of the image. */
private final String id;
/** The Sone the image belongs to. */
private Sone sone;
/** The album this image belongs to. */
private Album album;
/** The request key of the image. */
private String key;
/** The creation time of the image. */
private long creationTime;
/** The width of the image. */
private int width;
/** The height of the image. */
private int height;
/** The title of the image. */
private String title;
/** The description of the image. */
private String description;
/** Creates a new image with a random ID. */
public ImageImpl() {
this(UUID.randomUUID().toString());
this.creationTime = System.currentTimeMillis();
}
/**
* Creates a new image.
*
* @param id
* The ID of the image
*/
public ImageImpl(String id) {
this.id = checkNotNull(id, "id must not be null");
}
//
// ACCESSORS
//
@Override
public String getId() {
return id;
}
@Override
public Sone getSone() {
return sone;
}
@Override
public Album getAlbum() {
return album;
}
@Override
public Image setAlbum(Album album) {
checkNotNull(album, "album must not be null");
checkNotNull(album.getSone().equals(getSone()), "album must belong to the same Sone as this image");
this.album = album;
return this;
}
@Override
public String getKey() {
return key;
}
@Override
public boolean isInserted() {
return key != null;
}
@Override
public long getCreationTime() {
return creationTime;
}
@Override
public int getWidth() {
return width;
}
@Override
public int getHeight() {
return height;
}
@Override
public String getTitle() {
return title;
}
@Override
public String getDescription() {
return description;
}
public Modifier modify() throws IllegalStateException {
// TODO: reenable check for local images
return new Modifier() {
private Optional<Sone> sone = absent();
private Optional<Long> creationTime = absent();
private Optional<String> key = absent();
private Optional<String> title = absent();
private Optional<String> description = absent();
private Optional<Integer> width = absent();
private Optional<Integer> height = absent();
@Override
public Modifier setSone(Sone sone) {
this.sone = fromNullable(sone);
return this;
}
@Override
public Modifier setCreationTime(long creationTime) {
this.creationTime = of(creationTime);
return this;
}
@Override
public Modifier setKey(String key) {
this.key = fromNullable(key);
return this;
}
@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 setWidth(int width) {
this.width = of(width);
return this;
}
@Override
public Modifier setHeight(int height) {
this.height = of(height);
return this;
}
@Override
public Image update() throws IllegalStateException {
checkState(!sone.isPresent() || (ImageImpl.this.sone == null) || sone.get().equals(ImageImpl.this.sone), "can not change Sone once set");
checkState(!creationTime.isPresent() || ((ImageImpl.this.creationTime == 0) || (ImageImpl.this.creationTime == creationTime.get())), "can not change creation time once set");
checkState(!key.isPresent() || (ImageImpl.this.key == null) || key.get().equals(ImageImpl.this.key), "can not change key once set");
checkState(!width.isPresent() || (ImageImpl.this.width == 0) || width.get().equals(ImageImpl.this.width), "can not change width once set");
checkState(!height.isPresent() || (ImageImpl.this.height == 0) || height.get().equals(ImageImpl.this.height), "can not change height once set");
if (sone.isPresent()) {
ImageImpl.this.sone = sone.get();
}
if (creationTime.isPresent()) {
ImageImpl.this.creationTime = creationTime.get();
}
if (key.isPresent()) {
ImageImpl.this.key = key.get();
}
if (title.isPresent()) {
ImageImpl.this.title = title.get();
}
if (description.isPresent()) {
ImageImpl.this.description = description.get();
}
if (width.isPresent()) {
ImageImpl.this.width = width.get();
}
if (height.isPresent()) {
ImageImpl.this.height = height.get();
}
return ImageImpl.this;
}
};
}
//
// FINGERPRINTABLE METHODS
//
@Override
public String getFingerprint() {
Hasher hash = Hashing.sha256().newHasher();
hash.putString("Image(");
hash.putString("ID(").putString(id).putString(")");
hash.putString("Title(").putString(title).putString(")");
hash.putString("Description(").putString(description).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 ImageImpl)) {
return false;
}
return ((ImageImpl) object).id.equals(id);
}
}