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/*
* Copyright (C) 2012 Andrew Neal Licensed under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law
* or agreed to in writing, software distributed under the License is
* distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the specific language
* governing permissions and limitations under the License.
*/
package com.cyngn.eleven.cache;
import android.content.Context;
import android.graphics.Bitmap;
import android.widget.ImageView;
import com.cyngn.eleven.Config;
import com.cyngn.eleven.MusicPlaybackService;
import com.cyngn.eleven.cache.PlaylistWorkerTask.PlaylistWorkerType;
import com.cyngn.eleven.utils.MusicUtils;
import com.cyngn.eleven.widgets.BlurScrimImage;
/**
* A subclass of {@link ImageWorker} that fetches images from a URL.
*/
public class ImageFetcher extends ImageWorker {
private static ImageFetcher sInstance = null;
/**
* Creates a new instance of {@link ImageFetcher}.
*
* @param context The {@link Context} to use.
*/
public ImageFetcher(final Context context) {
super(context);
}
/**
* Used to create a singleton of the image fetcher
*
* @param context The {@link Context} to use
* @return A new instance of this class.
*/
public static final ImageFetcher getInstance(final Context context) {
if (sInstance == null) {
sInstance = new ImageFetcher(context.getApplicationContext());
}
return sInstance;
}
/**
* Loads a playlist's most played song's artist image
* @param playlistId id of the playlist
* @param imageView imageview to load into
*/
public void loadPlaylistArtistImage(final long playlistId, final ImageView imageView) {
loadPlaylistImage(playlistId, PlaylistWorkerType.Artist, imageView);
}
/**
* Loads a playlist's most played songs into a combined image, or show 1 if not enough images
* @param playlistId id of the playlist
* @param imageView imageview to load into
*/
public void loadPlaylistCoverArtImage(final long playlistId, final ImageView imageView) {
loadPlaylistImage(playlistId, PlaylistWorkerType.CoverArt, imageView);
}
/**
* Used to fetch album images.
*/
public void loadAlbumImage(final String artistName, final String albumName, final long albumId,
final ImageView imageView) {
loadImage(generateAlbumCacheKey(albumName, artistName), artistName, albumName, albumId, imageView,
ImageType.ALBUM);
}
/**
* Used to fetch the current artwork.
*/
public void loadCurrentArtwork(final ImageView imageView) {
loadImage(generateAlbumCacheKey(MusicUtils.getAlbumName(), MusicUtils.getArtistName()),
MusicUtils.getArtistName(), MusicUtils.getAlbumName(), MusicUtils.getCurrentAlbumId(),
imageView, ImageType.ALBUM);
}
/**
* Used to fetch the current artwork blurred.
*/
public void loadCurrentBlurredArtwork(final BlurScrimImage image) {
loadBlurImage(generateAlbumCacheKey(MusicUtils.getAlbumName(), MusicUtils.getArtistName()),
MusicUtils.getArtistName(), MusicUtils.getAlbumName(), MusicUtils.getCurrentAlbumId(),
image, ImageType.ALBUM);
}
/**
* Used to fetch artist images.
*/
public void loadArtistImage(final String key, final ImageView imageView) {
loadImage(key, key, null, -1, imageView, ImageType.ARTIST);
}
/**
* Used to fetch the current artist image.
*/
public void loadCurrentArtistImage(final ImageView imageView) {
loadImage(MusicUtils.getArtistName(), MusicUtils.getArtistName(), null, -1, imageView,
ImageType.ARTIST);
}
/**
* @param pause True to temporarily pause the disk cache, false otherwise.
*/
public void setPauseDiskCache(final boolean pause) {
if (mImageCache != null) {
mImageCache.setPauseDiskCache(pause);
}
}
/**
* Clears the disk and memory caches
*/
public void clearCaches() {
if (mImageCache != null) {
mImageCache.clearCaches();
}
}
/**
* @param key The key used to find the image to remove
*/
public void removeFromCache(final String key) {
if (mImageCache != null) {
mImageCache.removeFromCache(key);
}
}
/**
* @param key The key used to find the image to return
*/
public Bitmap getCachedBitmap(final String key) {
if (mImageCache != null) {
return mImageCache.getCachedBitmap(key);
}
return getDefaultArtwork();
}
/**
* @param keyAlbum The key (album name) used to find the album art to return
* @param keyArtist The key (artist name) used to find the album art to return
*/
public Bitmap getCachedArtwork(final String keyAlbum, final String keyArtist) {
return getCachedArtwork(keyAlbum, keyArtist,
MusicUtils.getIdForAlbum(mContext, keyAlbum, keyArtist));
}
/**
* @param keyAlbum The key (album name) used to find the album art to return
* @param keyArtist The key (artist name) used to find the album art to return
* @param keyId The key (album id) used to find the album art to return
*/
public Bitmap getCachedArtwork(final String keyAlbum, final String keyArtist,
final long keyId) {
if (mImageCache != null) {
return mImageCache.getCachedArtwork(mContext,
generateAlbumCacheKey(keyAlbum, keyArtist),
keyId);
}
return getDefaultArtwork();
}
/**
* Finds cached or downloads album art. Used in {@link MusicPlaybackService}
* to set the current album art in the notification and lock screen
*
* @param albumName The name of the current album
* @param albumId The ID of the current album
* @param artistName The album artist in case we should have to download
* missing artwork
* @return The album art as an {@link Bitmap}
*/
public Bitmap getArtwork(final String albumName, final long albumId, final String artistName) {
// Check the disk cache
Bitmap artwork = null;
if (artwork == null && albumName != null && mImageCache != null) {
artwork = mImageCache.getBitmapFromDiskCache(
generateAlbumCacheKey(albumName, artistName));
}
if (artwork == null && albumId >= 0 && mImageCache != null) {
// Check for local artwork
artwork = mImageCache.getArtworkFromFile(mContext, albumId);
}
if (artwork != null) {
return artwork;
}
return getDefaultArtwork();
}
/**
* Generates key used by album art cache. It needs both album name and artist name
* to let to select correct image for the case when there are two albums with the
* same artist.
*
* @param albumName The album name the cache key needs to be generated.
* @param artistName The artist name the cache key needs to be generated.
* @return
*/
public static String generateAlbumCacheKey(final String albumName, final String artistName) {
if (albumName == null || artistName == null) {
return null;
}
return new StringBuilder(albumName)
.append("_")
.append(artistName)
.append("_")
.append(Config.ALBUM_ART_SUFFIX)
.toString();
}
}
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