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package de.danoeh.antennapod.fragment;
import android.os.Bundle;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import com.joanzapata.iconify.Iconify;
import de.danoeh.antennapod.R;
import de.danoeh.antennapod.core.feed.FeedItem;
import de.danoeh.antennapod.core.feed.FeedItemFilter;
import de.danoeh.antennapod.core.storage.DBReader;
import de.danoeh.antennapod.dialog.FilterDialog;
import io.reactivex.Observable;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.schedulers.Schedulers;
import java.util.List;
import java.util.Set;
/**
* Like 'EpisodesFragment' except that it only shows new episodes and
* supports swiping to mark as read.
*/
public class AllEpisodesFragment extends EpisodesListFragment {
public static final String TAG = "AllEpisodesFragment";
private static final String PREF_NAME = "PrefAllEpisodesFragment";
private static final int EPISODES_PER_PAGE = 150;
private static final int VISIBLE_EPISODES_SCROLL_THRESHOLD = 5;
private static int page = 1;
private static FeedItemFilter feedItemFilter = new FeedItemFilter("");
@Override
protected boolean showOnlyNewEpisodes() {
return false;
}
@Override
protected String getPrefName() {
return PREF_NAME;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (!super.onOptionsItemSelected(item)) {
switch (item.getItemId()) {
case R.id.filter_items:
showFilterDialog();
return true;
default:
return false;
}
} else {
return true;
}
}
@NonNull
@Override
public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View root = super.onCreateView(inflater, container, savedInstanceState);
recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
/* Total number of episodes after last load */
private int previousTotalEpisodes = 0;
/* True if loading more episodes is still in progress */
private boolean isLoadingMore = true;
@Override
public void onScrolled(RecyclerView recyclerView, int deltaX, int deltaY) {
super.onScrolled(recyclerView, deltaX, deltaY);
int visibleEpisodeCount = recyclerView.getChildCount();
int totalEpisodeCount = recyclerView.getLayoutManager().getItemCount();
int firstVisibleEpisode = ((LinearLayoutManager) recyclerView.getLayoutManager()).findFirstVisibleItemPosition();
/* Determine if loading more episodes has finished */
if (isLoadingMore) {
if (totalEpisodeCount > previousTotalEpisodes) {
isLoadingMore = false;
previousTotalEpisodes = totalEpisodeCount;
}
}
/* Determine if the user scrolled to the bottom and loading more episodes is not already in progress */
if (!isLoadingMore && (totalEpisodeCount - visibleEpisodeCount)
<= (firstVisibleEpisode + VISIBLE_EPISODES_SCROLL_THRESHOLD)) {
/* The end of the list has been reached. Load more data. */
page++;
loadMoreItems();
isLoadingMore = true;
}
}
});
return root;
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
super.onCreateOptionsMenu(menu, inflater);
menu.findItem(R.id.filter_items).setVisible(true);
menu.findItem(R.id.mark_all_read_item).setVisible(!episodes.isEmpty());
}
@Override
protected void onFragmentLoaded(List<FeedItem> episodes) {
super.onFragmentLoaded(episodes);
if (feedItemFilter.getValues().length > 0) {
txtvInformation.setText("{fa-info-circle} " + this.getString(R.string.filtered_label));
Iconify.addIcons(txtvInformation);
txtvInformation.setVisibility(View.VISIBLE);
} else {
txtvInformation.setVisibility(View.GONE);
}
}
private void loadMoreItems() {
if (disposable != null) {
disposable.dispose();
}
disposable = Observable.fromCallable(this::loadMoreData)
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(data -> {
progLoading.setVisibility(View.GONE);
episodes.addAll(data);
onFragmentLoaded(episodes);
}, error -> Log.e(TAG, Log.getStackTraceString(error)));
}
private void showFilterDialog() {
FilterDialog filterDialog = new FilterDialog(getContext(), feedItemFilter) {
@Override
protected void updateFilter(Set<String> filterValues) {
feedItemFilter = new FeedItemFilter(filterValues.toArray(new String[filterValues.size()]));
loadItems();
}
};
filterDialog.openDialog();
}
@NonNull
@Override
protected List<FeedItem> loadData() {
return feedItemFilter.filter( DBReader.getRecentlyPublishedEpisodes(0, page * EPISODES_PER_PAGE));
}
List<FeedItem> loadMoreData() {
return feedItemFilter.filter( DBReader.getRecentlyPublishedEpisodes((page - 1) * EPISODES_PER_PAGE, EPISODES_PER_PAGE));
}
}
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