content: package com.alium.orin.adapter.artist;
  
  import android.graphics.drawable.Drawable;
  import android.support.annotation.LayoutRes;
  import android.support.annotation.NonNull;
  import android.support.annotation.Nullable;
  import android.support.v4.util.Pair;
  import android.support.v7.app.AppCompatActivity;
  import android.view.LayoutInflater;
  import android.view.MenuItem;
  import android.view.View;
  import android.view.ViewGroup;
  
  import com.alium.orin.adapter.base.AbsMultiSelectAdapter;
  import com.alium.orin.glide.palette.BitmapPaletteWrapper;
  import com.alium.orin.helper.menu.SongsMenuHelper;
  import com.alium.orin.interfaces.CabHolder;
  import com.alium.orin.model.Song;
  import com.alium.orin.util.ArtistSignatureUtil;
  import com.alium.orin.util.MusicUtil;
  import com.alium.orin.util.NavigationUtil;
  import com.bumptech.glide.Glide;
  import com.bumptech.glide.Priority;
  import com.bumptech.glide.load.engine.DiskCacheStrategy;
  import com.bumptech.glide.request.target.Target;
  import com.kabouzeid.appthemehelper.util.ColorUtil;
  import com.kabouzeid.appthemehelper.util.MaterialValueHelper;
  import com.alium.orin.R;
  import com.alium.orin.adapter.base.MediaEntryViewHolder;
  import com.alium.orin.glide.PhonographColoredTarget;
  import com.alium.orin.glide.artistimage.ArtistImage;
  import com.alium.orin.glide.palette.BitmapPaletteTranscoder;
  import com.alium.orin.model.Artist;
  import com.simplecityapps.recyclerview_fastscroll.views.FastScrollRecyclerView;
  
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * @author Karim Abou Zeid (kabouzeid)
   */
  public class ArtistAdapter extends AbsMultiSelectAdapter<ArtistAdapter.ViewHolder, Artist> implements FastScrollRecyclerView.SectionedAdapter {
  
      protected final AppCompatActivity activity;
      protected ArrayList<Artist> dataSet;
  
      protected int itemLayoutRes;
  
      protected boolean usePalette = false;
  
      public ArtistAdapter(@NonNull AppCompatActivity activity, ArrayList<Artist> dataSet, @LayoutRes int itemLayoutRes, boolean usePalette, @Nullable CabHolder cabHolder) {
          super(activity, cabHolder, R.menu.menu_media_selection);
          this.activity = activity;
          this.dataSet = dataSet;
          this.itemLayoutRes = itemLayoutRes;
          this.usePalette = usePalette;
          setHasStableIds(true);
      }
  
      public void swapDataSet(ArrayList<Artist> dataSet) {
          this.dataSet = dataSet;
          notifyDataSetChanged();
      }
  
      public ArrayList<Artist> getDataSet() {
          return dataSet;
      }
  
      public void usePalette(boolean usePalette) {
          this.usePalette = usePalette;
          notifyDataSetChanged();
      }
  
      @Override
      public long getItemId(int position) {
          return dataSet.get(position).getId();
      }
  
      @Override
      public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
          View view = LayoutInflater.from(activity).inflate(itemLayoutRes, parent, false);
          return createViewHolder(view);
      }
  
      protected ViewHolder createViewHolder(View view) {
          return new ViewHolder(view);
      }
  
      @Override
      public void onBindViewHolder(@NonNull final ViewHolder holder, int position) {
          final Artist artist = dataSet.get(position);
  
          boolean isChecked = isChecked(artist);
          holder.itemView.setActivated(isChecked);
  
          if (holder.getAdapterPosition() == getItemCount() - 1) {
              if (holder.shortSeparator != null) {
                  holder.shortSeparator.setVisibility(View.GONE);
              }
          } else {
              if (holder.shortSeparator != null) {
                  holder.shortSeparator.setVisibility(View.VISIBLE);
              }
          }
  
          if (holder.title != null) {
              holder.title.setText(artist.getName());
          }
          if (holder.text != null) {
              holder.text.setText(MusicUtil.getArtistInfoString(activity, artist));
          }
          holder.itemView.setActivated(isChecked(artist));
  
          loadArtistImage(artist, holder);
      }
  
      private void setColors(int color, ViewHolder holder) {
          if (holder.paletteColorContainer != null) {
              holder.paletteColorContainer.setBackgroundColor(color);
              if (holder.title != null) {
                  holder.title.setTextColor(MaterialValueHelper.getPrimaryTextColor(activity, ColorUtil.isColorLight(color)));
              }
              if (holder.text != null) {
                  holder.text.setTextColor(MaterialValueHelper.getSecondaryTextColor(activity, ColorUtil.isColorLight(color)));
              }
          }
      }
  
      protected void loadArtistImage(Artist artist, final ViewHolder holder) {
          if (holder.image == null) return;
          Glide.with(activity)
                  .load(new ArtistImage(artist.getName(), false))
                  .asBitmap()
                  .transcode(new BitmapPaletteTranscoder(activity), BitmapPaletteWrapper.class)
                  .diskCacheStrategy(DiskCacheStrategy.SOURCE)
                  .placeholder(R.drawable.default_artist_image)
                  .animate(android.R.anim.fade_in)
                  .priority(Priority.LOW)
                  .signature(ArtistSignatureUtil.getInstance(activity).getArtistSignature(artist.getName()))
                  .override(Target.SIZE_ORIGINAL, Target.SIZE_ORIGINAL)
                  .into(new PhonographColoredTarget(holder.image) {
                      @Override
                      public void onLoadCleared(Drawable placeholder) {
                          super.onLoadCleared(placeholder);
                          setColors(getDefaultFooterColor(), holder);
                      }
  
                      @Override
                      public void onColorReady(int color) {
                          if (usePalette)
                              setColors(color, holder);
                          else
                              setColors(getDefaultFooterColor(), holder);
                      }
                  });
      }
  
      @Override
      public int getItemCount() {
          return dataSet.size();
      }
  
      @Override
      protected Artist getIdentifier(int position) {
          return dataSet.get(position);
      }
  
      @Override
      protected String getName(Artist artist) {
          return artist.getName();
      }
  
      @Override
      protected void onMultipleItemAction(@NonNull MenuItem menuItem, @NonNull ArrayList<Artist> selection) {
          SongsMenuHelper.handleMenuClick(activity, getSongList(selection), menuItem.getItemId());
      }
  
      @NonNull
      private ArrayList<Song> getSongList(@NonNull List<Artist> artists) {
          final ArrayList<Song> songs = new ArrayList<>();
          for (Artist artist : artists) {
              songs.addAll(artist.getSongs()); // maybe async in future?
          }
          return songs;
      }
  
      @NonNull
      @Override
      public String getSectionName(int position) {
          return MusicUtil.getSectionName(dataSet.get(position).getName());
      }
  
      public class ViewHolder extends MediaEntryViewHolder {
  
          public ViewHolder(@NonNull View itemView) {
              super(itemView);
              setImageTransitionName(activity.getString(R.string.transition_artist_image));
              if (menu != null) {
                  menu.setVisibility(View.GONE);
              }
          }
  
          @Override
          public void onClick(View v) {
              if (isInQuickSelectMode()) {
                  toggleChecked(getAdapterPosition());
              } else {
                  Pair[] artistPairs = new Pair[]{
                          Pair.create(image,
                                  activity.getResources().getString(R.string.transition_artist_image)
                          )};
                  NavigationUtil.goToArtist(activity, dataSet.get(getAdapterPosition()).getId(), artistPairs);
              }
          }
  
          @Override
          public boolean onLongClick(View view) {
              toggleChecked(getAdapterPosition());
              return true;
          }
      }
  }
  