ultrasonic-app-subsonic-android/src/com/thejoshwa/ultrasonic/androidapp/activity/SelectAlbumActivity.java

/*
 This file is part of Subsonic.

 Subsonic 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.

 Subsonic 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 Subsonic.  If not, see <http://www.gnu.org/licenses/>.

 Copyright 2009 (C) Sindre Mehus
 */
package com.thejoshwa.ultrasonic.androidapp.activity;

import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.ContextMenu;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;

import com.handmark.pulltorefresh.library.PullToRefreshBase;
import com.handmark.pulltorefresh.library.PullToRefreshBase.OnRefreshListener;
import com.handmark.pulltorefresh.library.PullToRefreshListView;
import com.thejoshwa.ultrasonic.androidapp.R;
import com.thejoshwa.ultrasonic.androidapp.domain.MusicDirectory;
import com.thejoshwa.ultrasonic.androidapp.service.DownloadFile;
import com.thejoshwa.ultrasonic.androidapp.service.MusicService;
import com.thejoshwa.ultrasonic.androidapp.service.MusicServiceFactory;
import com.thejoshwa.ultrasonic.androidapp.util.AlbumHeader;
import com.thejoshwa.ultrasonic.androidapp.util.Constants;
import com.thejoshwa.ultrasonic.androidapp.util.EntryByDiscAndTrackComparator;
import com.thejoshwa.ultrasonic.androidapp.util.Pair;
import com.thejoshwa.ultrasonic.androidapp.util.TabActivityBackgroundTask;
import com.thejoshwa.ultrasonic.androidapp.util.Util;
import com.thejoshwa.ultrasonic.androidapp.view.EntryAdapter;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Random;

public class SelectAlbumActivity extends SubsonicTabActivity {

    private PullToRefreshListView refreshAlbumListView;
    private ListView albumListView;
    private View header;
    private View albumButtons;
    private View emptyView;
    private ImageView selectButton;
    private ImageView playNowButton;
    private ImageView playNextButton;    
    private ImageView playLastButton;
    private ImageView pinButton;
    private ImageView unpinButton;
    private ImageView downloadButton;
    private ImageView deleteButton;
    private ImageView moreButton;
    private boolean playAllButtonVisible;
    private MenuItem playAllButton;
    private boolean showHeader = true;
    private Random random = new Random();

    /**
     * Called when the activity is first created.
     */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.select_album);
        
        albumButtons = findViewById(R.id.menu_album);
        
        refreshAlbumListView = (PullToRefreshListView) findViewById(R.id.select_album_entries);
        albumListView = refreshAlbumListView.getRefreshableView();
        
        refreshAlbumListView.setOnRefreshListener(new OnRefreshListener<ListView>() {
            @Override
            public void onRefresh(PullToRefreshBase<ListView> refreshView) {
                new GetDataTask().execute();
            }
        });

        header = LayoutInflater.from(this).inflate(R.layout.select_album_header, albumListView, false);

        albumListView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
        albumListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                if (position >= 0) {
                    MusicDirectory.Entry entry = (MusicDirectory.Entry) parent.getItemAtPosition(position);
                    if (entry != null && entry.isDirectory()) {
                        Intent intent = new Intent(SelectAlbumActivity.this, SelectAlbumActivity.class);
                        intent.putExtra(Constants.INTENT_EXTRA_NAME_ID, entry.getId());
                        intent.putExtra(Constants.INTENT_EXTRA_NAME_IS_ALBUM, entry.isDirectory());
                        intent.putExtra(Constants.INTENT_EXTRA_NAME_NAME, entry.getTitle());
                        Util.startActivityWithoutTransition(SelectAlbumActivity.this, intent);
                    } else if (entry != null && entry.isVideo()) {
                        playVideo(entry);
                    } else {
                        enableButtons();
                    }
                }
            }
        });

        selectButton = (ImageView) findViewById(R.id.select_album_select);
        playNowButton = (ImageView) findViewById(R.id.select_album_play_now);
        playNextButton = (ImageView) findViewById(R.id.select_album_play_next);
        playLastButton = (ImageView) findViewById(R.id.select_album_play_last);
        pinButton = (ImageView) findViewById(R.id.select_album_pin);
        unpinButton = (ImageView) findViewById(R.id.select_album_unpin);
        downloadButton = (ImageView) findViewById(R.id.select_album_download);
        deleteButton = (ImageView) findViewById(R.id.select_album_delete);
        moreButton = (ImageView) findViewById(R.id.select_album_more);
		emptyView = findViewById(R.id.select_album_empty);

        selectButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                selectAllOrNone();
            }
        });
        playNowButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                playNow(false, false);
            }
        });
        playNextButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                download(true, false, false, true, false, getSelectedSongs(albumListView));
                selectAll(false, false);
            }
        });
        playLastButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                playNow(false, true);
            }
        });
        pinButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
            	downloadBackground(true);
                selectAll(false, false);
            }
        });
        unpinButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                unpin();
                selectAll(false, false);
            }
        });
        downloadButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
            	downloadBackground(false);
                selectAll(false, false);
            }
        });
        deleteButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                delete();
                selectAll(false, false);
            }
        });

        registerForContextMenu(albumListView);

        enableButtons();

        String id = getIntent().getStringExtra(Constants.INTENT_EXTRA_NAME_ID);
        boolean isAlbum = getIntent().getBooleanExtra(Constants.INTENT_EXTRA_NAME_IS_ALBUM, false);
		boolean isArtist = getIntent().getBooleanExtra(Constants.INTENT_EXTRA_NAME_ARTIST, false);
        String name = getIntent().getStringExtra(Constants.INTENT_EXTRA_NAME_NAME);
        String playlistId = getIntent().getStringExtra(Constants.INTENT_EXTRA_NAME_PLAYLIST_ID);
        String playlistName = getIntent().getStringExtra(Constants.INTENT_EXTRA_NAME_PLAYLIST_NAME);
        String albumListType = getIntent().getStringExtra(Constants.INTENT_EXTRA_NAME_ALBUM_LIST_TYPE);
        String genreName = getIntent().getStringExtra(Constants.INTENT_EXTRA_NAME_GENRE_NAME);
        int albumListTitle = getIntent().getIntExtra(Constants.INTENT_EXTRA_NAME_ALBUM_LIST_TITLE, 0);
        int getStarredTracks = getIntent().getIntExtra(Constants.INTENT_EXTRA_NAME_STARRED, 0);
        int getVideos = getIntent().getIntExtra(Constants.INTENT_EXTRA_NAME_VIDEOS, 0);
        int getRandomTracks = getIntent().getIntExtra(Constants.INTENT_EXTRA_NAME_RANDOM, 0);
        int albumListSize = getIntent().getIntExtra(Constants.INTENT_EXTRA_NAME_ALBUM_LIST_SIZE, 0);
        int albumListOffset = getIntent().getIntExtra(Constants.INTENT_EXTRA_NAME_ALBUM_LIST_OFFSET, 0);

        View browseMenuItem = findViewById(R.id.menu_browse);
        menuDrawer.setActiveView(browseMenuItem);
        
        if (playlistId != null) {
            getPlaylist(playlistId, playlistName);
        } else if (albumListType != null) {
            getAlbumList(albumListType, albumListTitle, albumListSize, albumListOffset);
        } else if (genreName != null) {
        	getSongsForGenre(genreName, albumListSize, albumListOffset);
        } else if (getStarredTracks != 0) {
        	getStarred();
        } else if (getVideos != 0) {
        	getVideos();
        } else if (getRandomTracks != 0) {
        	getRandom(albumListSize);        	
        } else {
        	if (!Util.isOffline(SelectAlbumActivity.this) && Util.getShouldUseId3Tags(SelectAlbumActivity.this)) {
        		if (isAlbum) {
        			getAlbum(id, name);
        		} else {
        			getArtist(id, name);        			
        		}
        	} else {
        		getMusicDirectory(id, name);	
        	}
        }
    }
    
    @Override
    public boolean onPrepareOptionsMenu(Menu menu) {
        super.onPrepareOptionsMenu(menu);
        playAllButton = menu.findItem(R.id.select_album_play_all);

        if (playAllButton != null) {
            playAllButton.setVisible(playAllButtonVisible);
        }

        return true;
    }
    
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
    	MenuInflater inflater = getMenuInflater();
    	inflater.inflate(R.menu.select_album, menu);
    	super.onCreateOptionsMenu(menu);
    	
    	return true;
    }
    
    private void playNow(final boolean shuffle, final boolean append) {
        List<MusicDirectory.Entry> selectedSongs = getSelectedSongs(albumListView);

        if (selectedSongs.size() > 0) {
			download(append, false, !append, false, shuffle, selectedSongs);
			selectAll(false, false);
		}
		else {
			playAll(shuffle, append);
		}
	}
    
   private void playAll() {
	   playAll(false, false);
   }

    private void playAll(final boolean shuffle, final boolean append) {
        boolean hasSubFolders = false;

        for (int i = 0; i < albumListView.getCount(); i++) {
            MusicDirectory.Entry entry = (MusicDirectory.Entry) albumListView.getItemAtPosition(i);
            if (entry != null && entry.isDirectory()) {
                hasSubFolders = true;
                break;
            }
        }

		boolean isArtist = getIntent().getBooleanExtra(Constants.INTENT_EXTRA_NAME_ARTIST, false);
        String id = getIntent().getStringExtra(Constants.INTENT_EXTRA_NAME_ID);

        if (hasSubFolders && id != null) {
            downloadRecursively(id, false, append, !append, shuffle, false, false, false, isArtist);
        } else {
            selectAll(true, false);
            download(append, false, !append, false, shuffle, getSelectedSongs(albumListView));
            selectAll(false, false);
        }
    }
    
    private List<MusicDirectory.Entry> getSelectedSongs(ListView albumListView) {
		List<MusicDirectory.Entry> songs = new ArrayList<MusicDirectory.Entry>(10);
    	
    	if (albumListView != null) {
    		int count = albumListView.getCount();
    		for (int i = 0; i < count; i++) {
    			if (albumListView.isItemChecked(i)) {
    				songs.add((MusicDirectory.Entry) albumListView.getItemAtPosition(i));
    			}
    		}
    	}
    	
        return songs;
    }

    private void refresh() {
        finish();
        Intent intent = getIntent();
        intent.putExtra(Constants.INTENT_EXTRA_NAME_REFRESH, true);
        Util.startActivityWithoutTransition(this, intent);
    }

    @Override
    public void onCreateContextMenu(ContextMenu menu, View view, ContextMenu.ContextMenuInfo menuInfo) {
        super.onCreateContextMenu(menu, view, menuInfo);
        AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo) menuInfo;

        MusicDirectory.Entry entry = (MusicDirectory.Entry) albumListView.getItemAtPosition(info.position);

        if (entry != null && entry.isDirectory()) {
            MenuInflater inflater = getMenuInflater();
            inflater.inflate(R.menu.select_album_context, menu);
        }
    }

    @Override
    public boolean onContextItemSelected(MenuItem menuItem) {
        AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo) menuItem.getMenuInfo();

        if (info == null) {
            return true;
        }

        MusicDirectory.Entry entry = (MusicDirectory.Entry) albumListView.getItemAtPosition(info.position);

        if (entry == null) {
            return true;
        }

        switch (menuItem.getItemId()) {
            case R.id.album_menu_play_now:
                downloadRecursively(entry.getId(), false, false, true, false, false, false, false, false);
                break;
            case R.id.album_menu_play_next:
                downloadRecursively(entry.getId(), false, false, false, false, false, true, false, false);
                break;                
            case R.id.album_menu_play_last:
                downloadRecursively(entry.getId(), false, true, false, false, false, false, false, false);
                break;
            case R.id.album_menu_pin:
                downloadRecursively(entry.getId(), true, true, false, false, false, false, false, false);
                break;
            case R.id.album_menu_unpin:
                downloadRecursively(entry.getId(), false, false, false, false, false, false, true, false);
                break;
            case R.id.album_menu_download:
                downloadRecursively(entry.getId(), false, false, false, false, true, false, false, false);
                break;                  
            case R.id.select_album_play_all:
            	playAll();
            	break;
            default:
                return super.onContextItemSelected(menuItem);
        }
        return true;
    }
    
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
			case android.R.id.home:
				menuDrawer.toggleMenu();
				return true; 
        	case R.id.main_shuffle:
        		Intent intent1 = new Intent(this, DownloadActivity.class);
        		intent1.putExtra(Constants.INTENT_EXTRA_NAME_SHUFFLE, true);
        		Util.startActivityWithoutTransition(this, intent1);
        		return true;
            case R.id.select_album_play_all:
            	playAll();
            	return true;          	
        }

        return false;
    }

    private void getMusicDirectory(final String id, final String name) {
        setActionBarSubtitle(name);

        new LoadTask() {
            @Override
            protected MusicDirectory load(MusicService service) throws Exception {
                boolean refresh = getIntent().getBooleanExtra(Constants.INTENT_EXTRA_NAME_REFRESH, false);
                return service.getMusicDirectory(id, name, refresh, SelectAlbumActivity.this, this);
            }
        }.execute();
    }
    
    private void getArtist(final String id, final String name) {
        setActionBarSubtitle(name);

        new LoadTask() {
            @Override
            protected MusicDirectory load(MusicService service) throws Exception {
                boolean refresh = getIntent().getBooleanExtra(Constants.INTENT_EXTRA_NAME_REFRESH, false);
                return service.getArtist(id, name, refresh, SelectAlbumActivity.this, this);
            }
        }.execute();
    }
    
    private void getAlbum(final String id, final String name) {
        setActionBarSubtitle(name);

        new LoadTask() {
            @Override
            protected MusicDirectory load(MusicService service) throws Exception {
                boolean refresh = getIntent().getBooleanExtra(Constants.INTENT_EXTRA_NAME_REFRESH, false);
                return service.getAlbum(id, name, refresh, SelectAlbumActivity.this, this);
            }
        }.execute();
    }
    
    private void getSongsForGenre(final String genre, final int count, final int offset) {
        setActionBarSubtitle(genre);

        new LoadTask() {
            @Override
            protected MusicDirectory load(MusicService service) throws Exception {
                return service.getSongsByGenre(genre, count, offset, SelectAlbumActivity.this, this);
            }
            
            @Override
            protected void done(Pair<MusicDirectory, Boolean> result) {
                    // Hide more button when results are less than album list size
                    if (result.getFirst().getChildren().size() < getIntent().getIntExtra(Constants.INTENT_EXTRA_NAME_ALBUM_LIST_SIZE, 0)) {
                    	moreButton.setVisibility(View.GONE);
                    } else {
                    	moreButton.setVisibility(View.VISIBLE);
                    }

                    moreButton.setOnClickListener(new View.OnClickListener() {
                        @Override
                        public void onClick(View view) {
                            Intent intent = new Intent(SelectAlbumActivity.this, SelectAlbumActivity.class);
                            String genre = getIntent().getStringExtra(Constants.INTENT_EXTRA_NAME_GENRE_NAME);
                            int size = getIntent().getIntExtra(Constants.INTENT_EXTRA_NAME_ALBUM_LIST_SIZE, 0);
                            int offset = getIntent().getIntExtra(Constants.INTENT_EXTRA_NAME_ALBUM_LIST_OFFSET, 0) + size;

                            intent.putExtra(Constants.INTENT_EXTRA_NAME_GENRE_NAME, genre);
                            intent.putExtra(Constants.INTENT_EXTRA_NAME_ALBUM_LIST_SIZE, size);
                            intent.putExtra(Constants.INTENT_EXTRA_NAME_ALBUM_LIST_OFFSET, offset);
                            Util.startActivityWithoutTransition(SelectAlbumActivity.this, intent);
                        }
                    });
                	
                super.done(result);
            }
        }.execute();
    }
    
    private void getStarred() {
        setActionBarSubtitle(R.string.main_songs_starred);

        new LoadTask() {
            @Override
            protected MusicDirectory load(MusicService service) throws Exception {
            	if (Util.getShouldUseId3Tags(SelectAlbumActivity.this)) {
            		return Util.getSongsFromSearchResult(service.getStarred2(SelectAlbumActivity.this, this));
            	} else {
            		return Util.getSongsFromSearchResult(service.getStarred(SelectAlbumActivity.this, this));
            	}
            }
        }.execute();
    }
    
    private void getVideos() {
    	showHeader = false;

        setActionBarSubtitle(R.string.main_videos);

        new LoadTask() {
            @Override
            protected MusicDirectory load(MusicService service) throws Exception {
            	boolean refresh = getIntent().getBooleanExtra(Constants.INTENT_EXTRA_NAME_REFRESH, false);
            	return service.getVideos(refresh, SelectAlbumActivity.this,  this);
            }
        }.execute();
    }
    
    private void getRandom(final int size) {
        setActionBarSubtitle(R.string.main_songs_random);

        new LoadTask() {
            @Override
            protected MusicDirectory load(MusicService service) throws Exception {
                return service.getRandomSongs(size, SelectAlbumActivity.this, this);
            }
        }.execute();
    }

    private void getPlaylist(final String playlistId, final String playlistName) {
        setActionBarSubtitle(playlistName);

        new LoadTask() {
            @Override
            protected MusicDirectory load(MusicService service) throws Exception {
                return service.getPlaylist(playlistId, playlistName, SelectAlbumActivity.this, this);
            }
        }.execute();
    }

    private void getAlbumList(final String albumListType, final int albumListTitle, final int size, final int offset) {
    	showHeader = false;

        setActionBarSubtitle(albumListTitle);

        new LoadTask() {
            @Override
            protected MusicDirectory load(MusicService service) throws Exception {
            	if (Util.getShouldUseId3Tags(SelectAlbumActivity.this)) {
            		return service.getAlbumList2(albumListType, size, offset, SelectAlbumActivity.this, this);
            	} else {
            		return service.getAlbumList(albumListType, size, offset, SelectAlbumActivity.this, this);
            	}
            }

            @Override
            protected void done(Pair<MusicDirectory, Boolean> result) {
                if (!result.getFirst().getChildren().isEmpty()) {
                    pinButton.setVisibility(View.GONE);
                    unpinButton.setVisibility(View.GONE);
                    downloadButton.setVisibility(View.GONE);
                    deleteButton.setVisibility(View.GONE);
                    
                    // Hide more button when results are less than album list size
                    if (result.getFirst().getChildren().size() < getIntent().getIntExtra(Constants.INTENT_EXTRA_NAME_ALBUM_LIST_SIZE, 0)) {
                    	moreButton.setVisibility(View.GONE);
                    } else {
                    	moreButton.setVisibility(View.VISIBLE);
                    	
                        moreButton.setOnClickListener(new View.OnClickListener() {
                            @Override
                            public void onClick(View view) {
                                Intent intent = new Intent(SelectAlbumActivity.this, SelectAlbumActivity.class);
                                int albumListTitle = getIntent().getIntExtra(Constants.INTENT_EXTRA_NAME_ALBUM_LIST_TITLE, 0);
                                String type = getIntent().getStringExtra(Constants.INTENT_EXTRA_NAME_ALBUM_LIST_TYPE);
                                int size = getIntent().getIntExtra(Constants.INTENT_EXTRA_NAME_ALBUM_LIST_SIZE, 0);
                                int offset = getIntent().getIntExtra(Constants.INTENT_EXTRA_NAME_ALBUM_LIST_OFFSET, 0) + size;

                                intent.putExtra(Constants.INTENT_EXTRA_NAME_ALBUM_LIST_TITLE, albumListTitle);
                                intent.putExtra(Constants.INTENT_EXTRA_NAME_ALBUM_LIST_TYPE, type);
                                intent.putExtra(Constants.INTENT_EXTRA_NAME_ALBUM_LIST_SIZE, size);
                                intent.putExtra(Constants.INTENT_EXTRA_NAME_ALBUM_LIST_OFFSET, offset);
                                Util.startActivityWithoutTransition(SelectAlbumActivity.this, intent);
                            }
                        });
                    }
                } else {
                   	moreButton.setVisibility(View.GONE);
                }
                	
                super.done(result);
            }
        }.execute();
    }

    private void selectAllOrNone() {
        boolean someUnselected = false;
        int count = albumListView.getCount();

        for (int i = 0; i < count; i++) {
            if (!albumListView.isItemChecked(i) && albumListView.getItemAtPosition(i) instanceof MusicDirectory.Entry) {
                someUnselected = true;
                break;
            }
        }

        selectAll(someUnselected, true);
    }

    private void selectAll(boolean selected, boolean toast) {
        int count = albumListView.getCount();
        int selectedCount = 0;

        for (int i = 0; i < count; i++) {
            MusicDirectory.Entry entry = (MusicDirectory.Entry) albumListView.getItemAtPosition(i);
            if (entry != null && !entry.isDirectory() && !entry.isVideo()) {
                albumListView.setItemChecked(i, selected);
                selectedCount++;
            }
        }

        // Display toast: N tracks selected / N tracks unselected
        if (toast) {
            int toastResId = selected ? R.string.select_album_n_selected : R.string.select_album_n_unselected;
            Util.toast(this, getString(toastResId, selectedCount));
        }

        enableButtons();
    }

    private void enableButtons() {
        if (getDownloadService() == null) {
            return;
        }

        List<MusicDirectory.Entry> selection = getSelectedSongs(albumListView);
        boolean enabled = !selection.isEmpty();
        boolean unpinEnabled = false;
        boolean deleteEnabled = false;

        int pinnedCount = 0;
        
        for (MusicDirectory.Entry song : selection) {
            DownloadFile downloadFile = getDownloadService().forSong(song);
            if (downloadFile.isWorkDone()) {
                deleteEnabled = true;
            }
            
            if (downloadFile.isSaved()) {
            	pinnedCount++;
                unpinEnabled = true;
            }
        }
        
        playNowButton.setVisibility(enabled ? View.VISIBLE : View.GONE);
        playNextButton.setVisibility(enabled ? View.VISIBLE : View.GONE);
        playLastButton.setVisibility(enabled ? View.VISIBLE : View.GONE);
        pinButton.setVisibility((enabled && !Util.isOffline(this) && selection.size() > pinnedCount) ? View.VISIBLE : View.GONE);
        unpinButton.setVisibility(enabled && unpinEnabled ? View.VISIBLE : View.GONE);
        downloadButton.setVisibility(enabled && !deleteEnabled && !Util.isOffline(this) ? View.VISIBLE : View.GONE);
        deleteButton.setVisibility(enabled && deleteEnabled ? View.VISIBLE : View.GONE);
    }

    private void downloadBackground(final boolean save) {
		List<MusicDirectory.Entry> songs = getSelectedSongs(albumListView);
		
		if (songs.isEmpty()) {
			selectAll(true, false);
			songs = getSelectedSongs(albumListView);
		}
		
		downloadBackground(save, songs);
	}
    
	private void downloadBackground(final boolean save, final List<MusicDirectory.Entry> songs) {
		if (getDownloadService() == null) {
			return;
		}

		Runnable onValid = new Runnable() {
			@Override
			public void run() {
				warnIfNetworkOrStorageUnavailable();
				getDownloadService().downloadBackground(songs, save);

				if (save) {
					Util.toast(SelectAlbumActivity.this, getResources().getQuantityString(R.plurals.select_album_n_songs_pinned, songs.size(), songs.size()));
				} else {
					Util.toast(SelectAlbumActivity.this, getResources().getQuantityString(R.plurals.select_album_n_songs_downloaded, songs.size(), songs.size()));
				}
			}
		};

		checkLicenseAndTrialPeriod(onValid);
	}
    
	private void delete() {
		List<MusicDirectory.Entry> songs = getSelectedSongs(albumListView);

		if (songs.isEmpty()) {
			selectAll(true, false);
			songs = getSelectedSongs(albumListView);
		}

        if (getDownloadService() != null) {
            getDownloadService().delete(songs);
        }
    }

    private void unpin() {
        if (getDownloadService() != null) {
        	List<MusicDirectory.Entry> songs = getSelectedSongs(albumListView);
            Util.toast(SelectAlbumActivity.this, getResources().getQuantityString(R.plurals.select_album_n_songs_unpinned, songs.size(), songs.size()));
            getDownloadService().unpin(songs);
        }
    }

    private abstract class LoadTask extends TabActivityBackgroundTask<Pair<MusicDirectory, Boolean>> {

        public LoadTask() {
            super(SelectAlbumActivity.this, true);
        }

        protected abstract MusicDirectory load(MusicService service) throws Exception;

        @Override
        protected Pair<MusicDirectory, Boolean> doInBackground() throws Throwable {
            MusicService musicService = MusicServiceFactory.getMusicService(SelectAlbumActivity.this);
            MusicDirectory dir = load(musicService);
            boolean valid = musicService.isLicenseValid(SelectAlbumActivity.this, this);
            return new Pair<MusicDirectory, Boolean>(dir, valid);
        }

        @Override
        protected void done(Pair<MusicDirectory, Boolean> result) {
        	MusicDirectory musicDirectory = result.getFirst();
            List<MusicDirectory.Entry> entries = musicDirectory.getChildren();
            
            if (Util.getShouldSortByDisc(SelectAlbumActivity.this)){
            	Collections.sort(entries, new EntryByDiscAndTrackComparator());
            }
            
            String directoryName = musicDirectory.getName();

            boolean allVideos = true;
            int songCount = 0;
            
            for (MusicDirectory.Entry entry : entries) {
            	if (!entry.isVideo()) {
            		allVideos = false;
            	}
            	
                if (!entry.isDirectory()) {
                    songCount++;
                }
            }

            final int listSize = getIntent().getIntExtra(Constants.INTENT_EXTRA_NAME_ALBUM_LIST_SIZE, 0);
            
            if (songCount > 0) {
				if(showHeader) {
					View header = createHeader(entries, directoryName, songCount);
					
					if (header != null) {
						albumListView.addHeaderView(header, null, false);
					}
				}

                pinButton.setVisibility(View.VISIBLE);
                unpinButton.setVisibility(View.VISIBLE);
                downloadButton.setVisibility(View.VISIBLE);
                deleteButton.setVisibility(View.VISIBLE);
                selectButton.setVisibility(allVideos ? View.GONE : View.VISIBLE);
                playNowButton.setVisibility(View.VISIBLE);
                playNextButton.setVisibility(View.VISIBLE);
                playLastButton.setVisibility(View.VISIBLE);
                       
                if (listSize == 0 || songCount < listSize) {
                	moreButton.setVisibility(View.GONE);
                } else {
                	moreButton.setVisibility(View.VISIBLE);
                	
                	if (getIntent().getIntExtra(Constants.INTENT_EXTRA_NAME_RANDOM, 0) > 0) {
                		moreButton.setOnClickListener(new View.OnClickListener() {
                        	@Override
                        	public void onClick(View view) {
                            	Intent intent = new Intent(SelectAlbumActivity.this, SelectAlbumActivity.class);
                            	int offset = getIntent().getIntExtra(Constants.INTENT_EXTRA_NAME_ALBUM_LIST_OFFSET, 0) + listSize;

                            	intent.putExtra(Constants.INTENT_EXTRA_NAME_RANDOM, 1);
                            	intent.putExtra(Constants.INTENT_EXTRA_NAME_ALBUM_LIST_SIZE, listSize);
                            	intent.putExtra(Constants.INTENT_EXTRA_NAME_ALBUM_LIST_OFFSET, offset);
                            	Util.startActivityWithoutTransition(SelectAlbumActivity.this, intent);
                        	}
                    	});
                	}
                }
            } else {
                pinButton.setVisibility(View.GONE);
                unpinButton.setVisibility(View.GONE);
                downloadButton.setVisibility(View.GONE);
                deleteButton.setVisibility(View.GONE);
                selectButton.setVisibility(View.GONE);
                playNowButton.setVisibility(View.GONE);
                playNextButton.setVisibility(View.GONE);
                playLastButton.setVisibility(View.GONE);
                
                if (listSize == 0 || result.getFirst().getChildren().size() < listSize) {
                	albumButtons.setVisibility(View.GONE);
                } else {
                	moreButton.setVisibility(View.VISIBLE);
                }
            }
            
            enableButtons();

            boolean isAlbumList = getIntent().hasExtra(Constants.INTENT_EXTRA_NAME_ALBUM_LIST_TYPE);
            playAllButtonVisible = !(isAlbumList || entries.isEmpty()) && !allVideos;

            emptyView.setVisibility(entries.isEmpty() ? View.VISIBLE : View.GONE);
            
            if (playAllButton != null) {
            	playAllButton.setVisible(playAllButtonVisible);
            }
            
            albumListView.setAdapter(new EntryAdapter(SelectAlbumActivity.this, getImageLoader(), entries, true));
            licenseValid = result.getSecond();

            boolean playAll = getIntent().getBooleanExtra(Constants.INTENT_EXTRA_NAME_AUTOPLAY, false);
            if (playAll && songCount > 0) {
                playAll(getIntent().getBooleanExtra(Constants.INTENT_EXTRA_NAME_SHUFFLE, false), false);
            }
        }
        
        protected View createHeader(List<MusicDirectory.Entry> entries, String name, int songCount) {
            ImageView coverArtView = (ImageView) header.findViewById(R.id.select_album_art);
            int artworkSelection = random.nextInt(entries.size());
            getImageLoader().loadImage(coverArtView, entries.get(artworkSelection), true, Util.getAlbumImageSize(SelectAlbumActivity.this), false, true);

            TextView titleView = (TextView) header.findViewById(R.id.select_album_title);
            titleView.setText(name != null ? name : getActionBarSubtitle());

            AlbumHeader albumHeader = AlbumHeader.processEntries(SelectAlbumActivity.this, entries);

            // Don't show a header if all entries are videos
            if (albumHeader.getIsAllVideo()) {
            	return null;
            }
            
            TextView artistView = (TextView) header.findViewById(R.id.select_album_artist);
            String artist;
            
            if (albumHeader.getArtists().size() == 1) {
            	artist = albumHeader.getArtists().iterator().next();
            } else if (albumHeader.getGrandParents().size() == 1) {
            	artist = albumHeader.getGrandParents().iterator().next();
            } else {
            	artist = getResources().getString(R.string.common_various_artists);
            }
            
            artistView.setText(artist);
            
            TextView genreView = (TextView) header.findViewById(R.id.select_album_genre);
            String genre;
            
            if (albumHeader.getGenres().size() == 1) {
            	genre = albumHeader.getGenres().iterator().next();
            } else {
            	genre = getResources().getString(R.string.common_multiple_genres);
            }
            
            genreView.setText(genre);

            TextView songCountView = (TextView) header.findViewById(R.id.select_album_song_count);
            String songs = getResources().getQuantityString(R.plurals.select_album_n_songs, songCount, songCount);
            songCountView.setText(songs);
            
            String duration = Util.formatTotalDuration(albumHeader.getTotalDuration());
            
            TextView durationView = (TextView) header.findViewById(R.id.select_album_duration);
            durationView.setText(duration);

            return header;
        }
    }
        
    private class GetDataTask extends AsyncTask<Void, Void, String[]> {
        @Override
        protected void onPostExecute(String[] result) {
            refreshAlbumListView.onRefreshComplete();
            super.onPostExecute(result);
        }

		@Override
		protected String[] doInBackground(Void... params) {
			refresh();
			return null;
		}
    }
}