ShuffleAllSection.java

package com.marverenic.music.adapter;

import android.app.Activity;
import android.support.v4.app.Fragment;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import com.marverenic.adapter.EnhancedViewHolder;
import com.marverenic.adapter.HeterogeneousAdapter;
import com.marverenic.music.JockeyApplication;
import com.marverenic.music.R;
import com.marverenic.music.activity.BaseLibraryActivity;
import com.marverenic.music.data.store.PreferenceStore;
import com.marverenic.music.model.Song;
import com.marverenic.music.player.PlayerController;
import com.simplecityapps.recyclerview_fastscroll.views.FastScrollRecyclerView.MeasurableAdapter;

import java.util.List;

import javax.inject.Inject;

public class ShuffleAllSection extends HeterogeneousAdapter.SingletonSection<List<Song>>
        implements MeasurableAdapter {

    @Inject PlayerController mPlayerController;
    @Inject PreferenceStore mPrefStore;

    private Activity mActivity;

    public ShuffleAllSection(Fragment fragment, List<Song> data) {
        this(fragment.getActivity(), data);
    }

    public ShuffleAllSection(Activity activity, List<Song> data) {
        super(data);
        mActivity = activity;

        JockeyApplication.getComponent(activity).inject(this);
    }

    @Override
    public EnhancedViewHolder<List<Song>> createViewHolder(HeterogeneousAdapter adapter,
                                                           ViewGroup parent) {
        View view = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.instance_shuffle_all, parent, false);

        return new ViewHolder(view);
    }

    @Override
    public boolean showSection(HeterogeneousAdapter adapter) {
        return !get(0).isEmpty();
    }

    @Override
    public int getViewTypeHeight(RecyclerView recyclerView, int viewType) {
        return recyclerView.getResources().getDimensionPixelSize(R.dimen.list_height_small)
                + recyclerView.getResources().getDimensionPixelSize(R.dimen.divider_height);
    }

    private class ViewHolder extends EnhancedViewHolder<List<Song>> {

        /**
         * @param itemView The view that this ViewHolder will manage
         */
        public ViewHolder(View itemView) {
            super(itemView);
        }

        @Override
        public void onUpdate(List<Song> songs, int position) {
            itemView.setOnClickListener(v -> {
                int firstSong = (int) (Math.random() * songs.size());
                mPrefStore.setShuffle(true);
                mPlayerController.updatePlayerPreferences(mPrefStore);
                mPlayerController.setQueue(songs, firstSong);
                mPlayerController.play();

                if (mPrefStore.openNowPlayingOnNewQueue()
                        && mActivity instanceof BaseLibraryActivity) {
                    ((BaseLibraryActivity) mActivity).expandBottomSheet();
                }
            });
        }
    }
}