TranslationsAdapter.java

package com.quran.labs.androidquran.ui.adapter;

import android.content.Context;
import android.support.annotation.Nullable;
import android.support.v7.widget.RecyclerView;
import android.text.TextUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import com.quran.labs.androidquran.R;
import com.quran.labs.androidquran.dao.translation.TranslationItem;
import com.quran.labs.androidquran.dao.translation.TranslationRowData;

import java.util.ArrayList;
import java.util.List;

import butterknife.BindView;
import butterknife.ButterKnife;
import io.reactivex.Observable;
import io.reactivex.subjects.UnicastSubject;

public class TranslationsAdapter extends RecyclerView.Adapter<TranslationsAdapter.TranslationViewHolder> {

  private final UnicastSubject<TranslationRowData> onClickDownloadSubject = UnicastSubject.create();
  private final UnicastSubject<TranslationRowData> onClickRemoveSubject = UnicastSubject.create();

  private List<TranslationRowData> translations = new ArrayList<>();
  private Context context;

  public TranslationsAdapter(Context context) {
    this.context = context;
  }

  @Override
  public TranslationViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View view = LayoutInflater.from(parent.getContext()).inflate(viewType, parent, false);
    return new TranslationViewHolder(view, viewType);
  }

  @Override
  public void onBindViewHolder(TranslationViewHolder holder, int position) {
    TranslationRowData rowItem = translations.get(position);
    switch (holder.getItemViewType()) {
      case R.layout.translation_row:
        TranslationItem item = (TranslationItem) rowItem;
        holder.getTranslationTitle().setText(item.name());
        if (TextUtils.isEmpty(item.translation.translatorNameLocalized)) {
          holder.getTranslationInfo().setText(item.translation.translator);
        } else {
          holder.getTranslationInfo().setText(item.translation.translatorNameLocalized);
        }

        ImageView leftImage = holder.getLeftImage();
        ImageView rightImage = holder.getRightImage();

        if (item.exists()) {
          if (item.needsUpgrade()) {
            leftImage.setImageResource(R.drawable.ic_download);
            leftImage.setVisibility(View.VISIBLE);
            holder.getTranslationInfo().setText(R.string.update_available);
          } else {
            leftImage.setVisibility(View.GONE);
          }
          rightImage.setImageResource(R.drawable.ic_cancel);
          rightImage.setVisibility(View.VISIBLE);
          rightImage.setContentDescription(context.getString(R.string.remove_button));
        } else {
          leftImage.setVisibility(View.GONE);
          rightImage.setImageResource(R.drawable.ic_download);
          rightImage.setVisibility(View.VISIBLE);
          rightImage.setOnClickListener(null);
          rightImage.setClickable(false);
          rightImage.setContentDescription(null);
        }
        break;
      case R.layout.translation_sep:
        holder.getSeparatorText().setText(rowItem.name());
        break;
    }
  }

  @Override
  public int getItemCount() {
    return translations.size();
  }

  @Override
  public int getItemViewType(int position) {
    return translations.get(position).isSeparator() ?
        R.layout.translation_sep : R.layout.translation_row;
  }

  public Observable<TranslationRowData> getOnClickDownloadSubject() {
    return onClickDownloadSubject.hide();
  }

  public Observable<TranslationRowData> getOnClickRemoveSubject() {
    return onClickRemoveSubject.hide();
  }

  public void setTranslations(List<TranslationRowData> data) {
    this.translations = data;
  }

  public List<TranslationRowData> getTranslations() {
    return translations;
  }

  class TranslationViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {

    @Nullable
    @BindView(R.id.translation_title)
    TextView translationTitle;

    @Nullable
    @BindView(R.id.translation_info)
    TextView translationInfo;

    @Nullable
    @BindView(R.id.left_image)
    ImageView leftImage;

    @Nullable
    @BindView(R.id.right_image)
    ImageView rightImage;

    @Nullable
    @BindView(R.id.separator_txt)
    TextView separatorText;

    TranslationViewHolder(View itemView, int viewType) {
      super(itemView);
      ButterKnife.bind(this, itemView);
      if (viewType == R.layout.translation_row) {
        itemView.setOnClickListener(this);
      }
    }

    TextView getSeparatorText() {
      return separatorText;
    }

    TextView getTranslationTitle() {
      return translationTitle;
    }

    TextView getTranslationInfo() {
      return translationInfo;
    }

    ImageView getLeftImage() {
      return leftImage;
    }

    ImageView getRightImage() {
      return rightImage;
    }

    @Override
    public void onClick(View v) {
      TranslationItem item = (TranslationItem) translations.get(getAdapterPosition());
      if (item.exists()) {
        onClickRemoveSubject.onNext(item);
      } else {
        onClickDownloadSubject.onNext(item);
      }
    }
  }
}