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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;
import android.text.TextUtils;
import com.cyanogenmod.eleven.model.Song;
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.Media.EXTERNAL_CONTENT_URI} and return
* the songs on a user's device.
*
* @author Andrew Neal (andrewdneal@gmail.com)
*/
public class SongLoader extends SectionCreator.SimpleListLoader<Song> {
/**
* The result
*/
protected ArrayList<Song> mSongList = Lists.newArrayList();
/**
* The {@link Cursor} used to run the query.
*/
protected Cursor mCursor;
/**
* Additional selection filter
*/
protected String mSelection;
/**
* @param context The {@link Context} to use
*/
public SongLoader(final Context context) {
this(context, null);
}
/**
* @param context The {@link Context} to use
* @param selection Additional selection filter to apply to the loader
*/
public SongLoader(final Context context, final String selection) {
super(context);
mSelection = selection;
}
/**
* {@inheritDoc}
*/
@Override
public List<Song> loadInBackground() {
// Create the Cursor
mCursor = getCursor();
// Gather the data
if (mCursor != null && mCursor.moveToFirst()) {
do {
// Copy the song Id
final long id = mCursor.getLong(0);
// Copy the song name
final String songName = mCursor.getString(1);
// Copy the artist name
final String artist = mCursor.getString(2);
// Copy the album id
final long albumId = mCursor.getLong(3);
// Copy the album name
final String album = mCursor.getString(4);
// Copy the duration
final long duration = mCursor.getLong(5);
// Convert the duration into seconds
final int durationInSecs = (int) duration / 1000;
// Copy the Year
final int year = mCursor.getInt(6);
// Create a new song
final Song song = new Song(id, songName, artist, album, albumId,
durationInSecs, year);
if (mCursor instanceof SortedCursor) {
song.mBucketLabel = (String)((SortedCursor)mCursor).getExtraData();
}
mSongList.add(song);
} while (mCursor.moveToNext());
}
// Close the cursor
if (mCursor != null) {
mCursor.close();
mCursor = null;
}
return mSongList;
}
/**
* Gets the cursor for the loader - can be overriden
* @return cursor to load
*/
protected Cursor getCursor() {
return makeSongCursor(mContext, mSelection);
}
/**
* 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.SongSortOrder.SONG_A_Z) ||
sortOrder.equals(SortOrder.SongSortOrder.SONG_Z_A)) {
return LocalizedStore.SortParameter.Song;
} else if (sortOrder.equals(SortOrder.SongSortOrder.SONG_ALBUM)) {
return LocalizedStore.SortParameter.Album;
} else if (sortOrder.equals(SortOrder.SongSortOrder.SONG_ARTIST)) {
return LocalizedStore.SortParameter.Artist;
}
return null;
}
/**
* Creates the {@link Cursor} used to run the query.
*
* @param context The {@link Context} to use.
* @param selection Additional selection statement to use
* @return The {@link Cursor} used to run the song query.
*/
public static final Cursor makeSongCursor(final Context context, final String selection) {
return makeSongCursor(context, selection, true);
}
/**
* Creates the {@link Cursor} used to run the query.
*
* @param context The {@link Context} to use.
* @param selection Additional selection statement to use
* @param runSort For localized sorts this can enable/disable the logic for running the
* additional localization sort. Queries that apply their own sorts can pass
* in false for a boost in perf
* @return The {@link Cursor} used to run the song query.
*/
public static final Cursor makeSongCursor(final Context context, final String selection,
final boolean runSort) {
String selectionStatement = MusicUtils.MUSIC_ONLY_SELECTION;
if (!TextUtils.isEmpty(selection)) {
selectionStatement += " AND " + selection;
}
final String songSortOrder = PreferenceUtils.getInstance(context).getSongSortOrder();
Cursor cursor = context.getContentResolver().query(Audio.Media.EXTERNAL_CONTENT_URI,
new String[] {
/* 0 */
Audio.Media._ID,
/* 1 */
Audio.Media.TITLE,
/* 2 */
Audio.Media.ARTIST,
/* 3 */
Audio.Media.ALBUM_ID,
/* 4 */
Audio.Media.ALBUM,
/* 5 */
Audio.Media.DURATION,
/* 6 */
Audio.Media.YEAR,
}, selectionStatement, null, songSortOrder);
// if our sort is a localized-based sort, grab localized data from the store
final SortParameter sortParameter = getSortParameter(songSortOrder);
if (runSort && sortParameter != null && cursor != null) {
final boolean descending = MusicUtils.isSortOrderDesending(songSortOrder);
return LocalizedStore.getInstance(context).getLocalizedSort(cursor, Audio.Media._ID,
SortParameter.Song, sortParameter, descending, TextUtils.isEmpty(selection));
}
return cursor;
}
}
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