1 files changed, 143 insertions, 0 deletions
diff --git a/app/src/main/java/de/danoeh/antennapod/fragment/DiscoveryFragment.java b/app/src/main/java/de/danoeh/antennapod/fragment/DiscoveryFragment.java
new file mode 100644
index 000000000..89d3c7af9
--- /dev/null
+++ b/app/src/main/java/de/danoeh/antennapod/fragment/DiscoveryFragment.java
@@ -0,0 +1,143 @@
+package de.danoeh.antennapod.fragment;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Button;
+import android.widget.GridView;
+import android.widget.ProgressBar;
+import android.widget.TextView;
+import androidx.annotation.NonNull;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.fragment.app.Fragment;
+import de.danoeh.antennapod.R;
+import de.danoeh.antennapod.activity.OnlineFeedViewActivity;
+import de.danoeh.antennapod.adapter.itunes.ItunesAdapter;
+import de.danoeh.antennapod.discovery.ItunesTopListLoader;
+import de.danoeh.antennapod.discovery.PodcastSearchResult;
+import io.reactivex.disposables.Disposable;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Searches iTunes store for top podcasts and displays results in a list.
+ */
+public class DiscoveryFragment extends Fragment {
+
+    private static final String TAG = "ItunesSearchFragment";
+
+    /**
+     * Adapter responsible with the search results.
+     */
+    private ItunesAdapter adapter;
+    private GridView gridView;
+    private ProgressBar progressBar;
+    private TextView txtvError;
+    private Button butRetry;
+    private TextView txtvEmpty;
+
+    /**
+     * List of podcasts retreived from the search.
+     */
+    private List<PodcastSearchResult> searchResults;
+    private List<PodcastSearchResult> topList;
+    private Disposable disposable;
+
+    /**
+     * Replace adapter data with provided search results from SearchTask.
+     * @param result List of Podcast objects containing search results
+     */
+    private void updateData(List<PodcastSearchResult> result) {
+        this.searchResults = result;
+        adapter.clear();
+        if (result != null && result.size() > 0) {
+            gridView.setVisibility(View.VISIBLE);
+            txtvEmpty.setVisibility(View.GONE);
+            for (PodcastSearchResult p : result) {
+                adapter.add(p);
+            }
+            adapter.notifyDataSetInvalidated();
+        } else {
+            gridView.setVisibility(View.GONE);
+            txtvEmpty.setVisibility(View.VISIBLE);
+        }
+    }
+
+    public DiscoveryFragment() {
+        // Required empty public constructor
+    }
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setHasOptionsMenu(true);
+    }
+
+    @Override
+    public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container,
+                             Bundle savedInstanceState) {
+        // Inflate the layout for this fragment
+        View root = inflater.inflate(R.layout.fragment_itunes_search, container, false);
+        ((AppCompatActivity) getActivity()).setSupportActionBar(root.findViewById(R.id.toolbar));
+        gridView = root.findViewById(R.id.gridView);
+        adapter = new ItunesAdapter(getActivity(), new ArrayList<>());
+        gridView.setAdapter(adapter);
+
+        //Show information about the podcast when the list item is clicked
+        gridView.setOnItemClickListener((parent, view1, position, id) -> {
+            PodcastSearchResult podcast = searchResults.get(position);
+            if (podcast.feedUrl == null) {
+                return;
+            }
+            Intent intent = new Intent(getActivity(), OnlineFeedViewActivity.class);
+            intent.putExtra(OnlineFeedViewActivity.ARG_FEEDURL, podcast.feedUrl);
+            startActivity(intent);
+        });
+        progressBar = root.findViewById(R.id.progressBar);
+        txtvError = root.findViewById(R.id.txtvError);
+        butRetry = root.findViewById(R.id.butRetry);
+        txtvEmpty = root.findViewById(android.R.id.empty);
+
+        loadToplist();
+
+        return root;
+    }
+
+    @Override
+    public void onDestroy() {
+        super.onDestroy();
+        if (disposable != null) {
+            disposable.dispose();
+        }
+        adapter = null;
+    }
+
+    private void loadToplist() {
+        if (disposable != null) {
+            disposable.dispose();
+        }
+        gridView.setVisibility(View.GONE);
+        txtvError.setVisibility(View.GONE);
+        butRetry.setVisibility(View.GONE);
+        txtvEmpty.setVisibility(View.GONE);
+        progressBar.setVisibility(View.VISIBLE);
+
+        ItunesTopListLoader loader = new ItunesTopListLoader(getContext());
+        disposable = loader.loadToplist(25).subscribe(podcasts -> {
+            progressBar.setVisibility(View.GONE);
+            topList = podcasts;
+            updateData(topList);
+        }, error -> {
+                Log.e(TAG, Log.getStackTraceString(error));
+                progressBar.setVisibility(View.GONE);
+                txtvError.setText(error.toString());
+                txtvError.setVisibility(View.VISIBLE);
+                butRetry.setOnClickListener(v -> loadToplist());
+                butRetry.setVisibility(View.VISIBLE);
+            });
+    }
+}