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/*
* Copyright (C) 2012 Andrew Neal
* Copyright (C) 2014 The CyanogenMod Project
* 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.cyanogenmod.eleven.loaders;
import android.content.Context;
import android.database.Cursor;
import android.provider.MediaStore;
import android.provider.MediaStore.Audio.Artists;
import com.cyanogenmod.eleven.model.Artist;
import com.cyanogenmod.eleven.provider.LocalizedStore;
import com.cyanogenmod.eleven.provider.LocalizedStore.SortParameter;
import com.cyanogenmod.eleven.sectionadapter.SectionCreator;
import com.cyanogenmod.eleven.utils.Lists;
import com.cyanogenmod.eleven.utils.MusicUtils;
import com.cyanogenmod.eleven.utils.PreferenceUtils;
import com.cyanogenmod.eleven.utils.SortOrder;
import java.util.ArrayList;
import java.util.List;
/**
* Used to query {@link MediaStore.Audio.Artists.EXTERNAL_CONTENT_URI} and
* return the artists on a user's device.
*
* @author Andrew Neal (andrewdneal@gmail.com)
*/
public class ArtistLoader extends SectionCreator.SimpleListLoader<Artist> {
/**
* The result
*/
private ArrayList<Artist> mArtistsList = Lists.newArrayList();
/**
* Constructor of <code>ArtistLoader</code>
*
* @param context The {@link Context} to use
*/
public ArtistLoader(final Context context) {
super(context);
}
/**
* {@inheritDoc}
*/
@Override
public List<Artist> loadInBackground() {
// Create the Cursor
Cursor cursor = makeArtistCursor(getContext());
// Gather the data
if (cursor != null && cursor.moveToFirst()) {
do {
// Copy the artist id
final long id = cursor.getLong(0);
// Copy the artist name
final String artistName = cursor.getString(1);
// Copy the number of albums
final int albumCount = cursor.getInt(2);
// Copy the number of songs
final int songCount = cursor.getInt(3);
// as per designer's request, don't show unknown artist
if (MediaStore.UNKNOWN_STRING.equals(artistName)) {
continue;
}
// Create a new artist
final Artist artist = new Artist(id, artistName, songCount, albumCount);
if (cursor instanceof SortedCursor) {
artist.mBucketLabel = (String)((SortedCursor) cursor).getExtraData();
}
mArtistsList.add(artist);
} while (cursor.moveToNext());
}
// Close the cursor
if (cursor != null) {
cursor.close();
cursor = null;
}
return mArtistsList;
}
/**
* For string-based sorts, return the localized store sort parameter, otherwise return null
* @param sortOrder the song ordering preference selected by the user
*/
private static LocalizedStore.SortParameter getSortParameter(String sortOrder) {
if (sortOrder.equals(SortOrder.ArtistSortOrder.ARTIST_A_Z) ||
sortOrder.equals(SortOrder.ArtistSortOrder.ARTIST_Z_A)) {
return LocalizedStore.SortParameter.Artist;
}
return null;
}
/**
* Creates the {@link Cursor} used to run the query.
*
* @param context The {@link Context} to use.
* @return The {@link Cursor} used to run the artist query.
*/
public static final Cursor makeArtistCursor(final Context context) {
// requested artist ordering
final String artistSortOrder = PreferenceUtils.getInstance(context).getArtistSortOrder();
Cursor cursor = context.getContentResolver().query(Artists.EXTERNAL_CONTENT_URI,
new String[] {
/* 0 */
Artists._ID,
/* 1 */
Artists.ARTIST,
/* 2 */
Artists.NUMBER_OF_ALBUMS,
/* 3 */
Artists.NUMBER_OF_TRACKS
}, null, null, artistSortOrder);
// if our sort is a localized-based sort, grab localized data from the store
final SortParameter sortParameter = getSortParameter(artistSortOrder);
if (sortParameter != null && cursor != null) {
final boolean descending = MusicUtils.isSortOrderDesending(artistSortOrder);
return LocalizedStore.getInstance(context).getLocalizedSort(cursor, Artists._ID,
SortParameter.Artist, sortParameter, descending, true);
}
return cursor;
}
}
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