Android/app/src/main/java/com/moiseum/wolnelektury/view/news/NewsListFragment.java

   1 package com.moiseum.wolnelektury.view.news;
   2
   3 import android.os.Bundle;
   4 import android.support.v7.widget.LinearLayoutManager;
   5 import android.view.View;
   6 import android.widget.Button;
   7 import android.widget.ProgressBar;
   8 import android.widget.Toast;
   9
  10 import com.moiseum.wolnelektury.R;
  11 import com.moiseum.wolnelektury.base.mvp.PresenterFragment;
  12 import com.moiseum.wolnelektury.components.ProgressRecyclerView;
  13 import com.moiseum.wolnelektury.components.recycler.EndlessRecyclerOnScrollListener;
  14 import com.moiseum.wolnelektury.connection.models.NewsModel;
  15 import com.moiseum.wolnelektury.view.news.single.NewsActivity;
  16
  17 import java.util.List;
  18
  19 import butterknife.BindView;
  20 import butterknife.OnClick;
  21
  22 public class NewsListFragment extends PresenterFragment<NewsListPresenter> implements NewsListView {
  23
  24     public static NewsListFragment newInstance() {
  25         return new NewsListFragment();
  26     }
  27
  28     @BindView(R.id.rvNews)
  29     ProgressRecyclerView<NewsModel> rvNews;
  30         @BindView(R.id.pbLoadMore)
  31         ProgressBar pbLoadMore;
  32         @BindView(R.id.btnReloadMore)
  33         Button btnReloadMore;
  34
  35     private NewsListAdapter adapter;
  36         private EndlessRecyclerOnScrollListener rvBooksScrollListener = new EndlessRecyclerOnScrollListener() {
  37                 @Override
  38                 public void onLoadMore() {
  39                         if (adapter.getItemCount() > 0) {
  40                                 getPresenter().loadMoreNews();
  41                         }
  42                 }
  43         };
  44
  45     @Override
  46     protected NewsListPresenter createPresenter() {
  47         return new NewsListPresenter(this);
  48     }
  49
  50     @Override
  51     public int getLayoutResourceId() {
  52         return R.layout.fragment_news;
  53     }
  54
  55     @Override
  56     public void prepareView(View view, Bundle savedInstanceState) {
  57             LinearLayoutManager layoutManager = new LinearLayoutManager(getContext());
  58             rvNews.setLayoutManager(layoutManager);
  59             rvNews.addOnScrollListener(rvBooksScrollListener);
  60
  61             adapter = new NewsListAdapter(getContext());
  62             adapter.setOnItemClickListener((item, view1, position) -> getPresenter().onNewsClicked(item));
  63             rvNews.setAdapter(adapter);
  64     }
  65
  66         @Override
  67         public void setData(List<NewsModel> data) {
  68                 if (adapter.getItemCount() == 0) {
  69                         rvNews.setItems(data);
  70                 } else {
  71                         rvNews.addItems(data);
  72                 }
  73         }
  74
  75         @Override
  76         public void setProgressVisible(boolean visible) {
  77                 if (adapter.getItemCount() == 0) {
  78                         rvNews.setProgressVisible(visible);
  79                 } else {
  80                         pbLoadMore.setVisibility(visible ? View.VISIBLE : View.GONE);
  81                 }
  82         }
  83
  84         @Override
  85         public void showError(Exception e) {
  86                 Toast.makeText(getContext(), R.string.loading_results_failed, Toast.LENGTH_SHORT).show();
  87                 if (adapter.getItemCount() != 0) {
  88                         btnReloadMore.setVisibility(View.VISIBLE);
  89                 } else {
  90                         rvNews.showRetryButton(() -> getPresenter().loadMoreNews());
  91                 }
  92         }
  93
  94         @Override
  95         public void launchNews(NewsModel news) {
  96                 startActivity(new NewsActivity.NewsIntent(news, getContext()));
  97         }
  98
  99         @OnClick(R.id.btnReloadMore)
 100         public void onReloadMoreClicked() {
 101                 btnReloadMore.setVisibility(View.GONE);
 102                 pbLoadMore.setVisibility(View.VISIBLE);
 103                 getPresenter().loadMoreNews();
 104         }
 105 }