content: package de.danoeh.antennapod.ui.screen;
  
  import android.content.ActivityNotFoundException;
  import android.content.ClipData;
  import android.content.ClipboardManager;
  import android.content.Context;
  import android.content.Intent;
  import android.net.Uri;
  import android.os.Bundle;
  import android.text.InputType;
  import android.util.Log;
  import android.view.LayoutInflater;
  import android.view.View;
  import android.view.ViewGroup;
  import android.view.inputmethod.InputMethodManager;
  
  import androidx.activity.result.ActivityResultLauncher;
  import androidx.activity.result.contract.ActivityResultContracts;
  import androidx.activity.result.contract.ActivityResultContracts.GetContent;
  import androidx.annotation.NonNull;
  import androidx.annotation.Nullable;
  import com.google.android.material.dialog.MaterialAlertDialogBuilder;
  
  import androidx.core.widget.NestedScrollView;
  import androidx.documentfile.provider.DocumentFile;
  import androidx.fragment.app.Fragment;
  
  import de.danoeh.antennapod.R;
  import de.danoeh.antennapod.activity.MainActivity;
  import de.danoeh.antennapod.activity.OpmlImportActivity;
  import de.danoeh.antennapod.event.MessageEvent;
  import de.danoeh.antennapod.model.feed.Feed;
  import de.danoeh.antennapod.net.download.serviceinterface.FeedUpdateManager;
  import de.danoeh.antennapod.storage.database.FeedDatabaseWriter;
  import de.danoeh.antennapod.model.feed.SortOrder;
  import de.danoeh.antennapod.databinding.AddfeedBinding;
  import de.danoeh.antennapod.databinding.EditTextDialogBinding;
  import de.danoeh.antennapod.net.discovery.CombinedSearcher;
  import de.danoeh.antennapod.net.discovery.FyydPodcastSearcher;
  import de.danoeh.antennapod.net.discovery.ItunesPodcastSearcher;
  import de.danoeh.antennapod.net.discovery.PodcastIndexPodcastSearcher;
  import de.danoeh.antennapod.ui.appstartintent.OnlineFeedviewActivityStarter;
  import de.danoeh.antennapod.ui.discovery.OnlineSearchFragment;
  import de.danoeh.antennapod.ui.screen.feed.FeedItemlistFragment;
  import de.danoeh.antennapod.ui.view.LiftOnScrollListener;
  import io.reactivex.rxjava3.core.Observable;
  import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
  import io.reactivex.rxjava3.schedulers.Schedulers;
  import org.greenrobot.eventbus.EventBus;
  
  import java.util.Collections;
  
  /**
   * Provides actions for adding new podcast subscriptions.
   */
  public class AddFeedFragment extends Fragment {
  
      public static final String TAG = "AddFeedFragment";
      private static final String KEY_UP_ARROW = "up_arrow";
  
      private AddfeedBinding viewBinding;
      private MainActivity activity;
      private boolean displayUpArrow;
  
      private final ActivityResultLauncher<String> chooseOpmlImportPathLauncher =
              registerForActivityResult(new GetContent(), this::chooseOpmlImportPathResult);
      private final ActivityResultLauncher<Uri> addLocalFolderLauncher =
              registerForActivityResult(new AddLocalFolder(), this::addLocalFolderResult);
  
      @Override
      @Nullable
      public View onCreateView(@NonNull LayoutInflater inflater,
                               @Nullable ViewGroup container,
                               @Nullable Bundle savedInstanceState) {
          super.onCreateView(inflater, container, savedInstanceState);
          viewBinding = AddfeedBinding.inflate(inflater);
          activity = (MainActivity) getActivity();
  
          displayUpArrow = getParentFragmentManager().getBackStackEntryCount() != 0;
          if (savedInstanceState != null) {
              displayUpArrow = savedInstanceState.getBoolean(KEY_UP_ARROW);
          }
          ((MainActivity) getActivity()).setupToolbarToggle(viewBinding.toolbar, displayUpArrow);
  
          NestedScrollView scrollView = viewBinding.getRoot().findViewById(R.id.scrollView);
          scrollView.setOnScrollChangeListener(new LiftOnScrollListener(viewBinding.appbar));
  
          viewBinding.searchItunesButton.setOnClickListener(v
                  -> activity.loadChildFragment(OnlineSearchFragment.newInstance(ItunesPodcastSearcher.class)));
          viewBinding.searchFyydButton.setOnClickListener(v
                  -> activity.loadChildFragment(OnlineSearchFragment.newInstance(FyydPodcastSearcher.class)));
          viewBinding.searchPodcastIndexButton.setOnClickListener(v
                  -> activity.loadChildFragment(OnlineSearchFragment.newInstance(PodcastIndexPodcastSearcher.class)));
  
          viewBinding.combinedFeedSearchEditText.setOnEditorActionListener((v, actionId, event) -> {
              performSearch();
              return true;
          });
  
          viewBinding.addViaUrlButton.setOnClickListener(v
                  -> showAddViaUrlDialog());
  
          viewBinding.opmlImportButton.setOnClickListener(v -> {
              try {
                  chooseOpmlImportPathLauncher.launch("*/*");
              } catch (ActivityNotFoundException e) {
                  e.printStackTrace();
                  EventBus.getDefault().post(new MessageEvent(getString(R.string.unable_to_start_system_file_manager)));
              }
          });
  
          viewBinding.addLocalFolderButton.setOnClickListener(v -> {
              try {
                  addLocalFolderLauncher.launch(null);
              } catch (ActivityNotFoundException e) {
                  e.printStackTrace();
                  EventBus.getDefault().post(new MessageEvent(getString(R.string.unable_to_start_system_file_manager)));
              }
          });
          viewBinding.searchButton.setOnClickListener(view -> performSearch());
  
          return viewBinding.getRoot();
      }
  
      @Override
      public void onSaveInstanceState(@NonNull Bundle outState) {
          outState.putBoolean(KEY_UP_ARROW, displayUpArrow);
          super.onSaveInstanceState(outState);
      }
  
      private void showAddViaUrlDialog() {
          MaterialAlertDialogBuilder builder = new MaterialAlertDialogBuilder(getContext());
          builder.setTitle(R.string.add_podcast_by_url);
          final EditTextDialogBinding dialogBinding = EditTextDialogBinding.inflate(getLayoutInflater());
          dialogBinding.textInput.setHint(R.string.rss_address);
          dialogBinding.textInput.setInputType(InputType.TYPE_CLASS_TEXT
                  | InputType.TYPE_TEXT_FLAG_MULTI_LINE | InputType.TYPE_TEXT_VARIATION_URI);
  
          ClipboardManager clipboard = (ClipboardManager) getContext().getSystemService(Context.CLIPBOARD_SERVICE);
          final ClipData clipData = clipboard.getPrimaryClip();
          if (clipData != null && clipData.getItemCount() > 0 && clipData.getItemAt(0).getText() != null) {
              final String clipboardContent = clipData.getItemAt(0).getText().toString();
              if (clipboardContent.trim().startsWith("http")) {
                  dialogBinding.textInput.setText(clipboardContent.trim());
              }
          }
          builder.setView(dialogBinding.getRoot());
          builder.setPositiveButton(R.string.confirm_label,
                  (dialog, which) -> addUrl(dialogBinding.textInput.getText().toString()));
          builder.setNegativeButton(R.string.cancel_label, null);
          builder.show();
      }
  
      private void addUrl(String url) {
          startActivity(new OnlineFeedviewActivityStarter(getContext(), url).withManualUrl().getIntent());
      }
  
      private void performSearch() {
          viewBinding.combinedFeedSearchEditText.clearFocus();
          InputMethodManager in = (InputMethodManager) getActivity().getSystemService(Context.INPUT_METHOD_SERVICE);
          in.hideSoftInputFromWindow(viewBinding.combinedFeedSearchEditText.getWindowToken(), 0);
          String query = viewBinding.combinedFeedSearchEditText.getText().toString();
          if (query.matches("http[s]?://.*")) {
              addUrl(query);
              return;
          }
          activity.loadChildFragment(OnlineSearchFragment.newInstance(CombinedSearcher.class, query));
          viewBinding.combinedFeedSearchEditText.post(() -> viewBinding.combinedFeedSearchEditText.setText(""));
      }
  
      private void chooseOpmlImportPathResult(final Uri uri) {
          if (uri == null) {
              return;
          }
          final Intent intent = new Intent(getContext(), OpmlImportActivity.class);
          intent.setData(uri);
          startActivity(intent);
      }
  
      private void addLocalFolderResult(final Uri uri) {
          if (uri == null) {
              return;
          }
          Observable.fromCallable(() -> addLocalFolder(uri))
                  .subscribeOn(Schedulers.io())
                  .observeOn(AndroidSchedulers.mainThread())
                  .subscribe(
                          feed -> {
                              Fragment fragment = FeedItemlistFragment.newInstance(feed.getId());
                              ((MainActivity) getActivity()).loadChildFragment(fragment);
                          }, error -> {
                              Log.e(TAG, Log.getStackTraceString(error));
                              EventBus.getDefault().post(new MessageEvent(error.getLocalizedMessage()));
                          });
      }
  
      private Feed addLocalFolder(Uri uri) {
          getActivity().getContentResolver().takePersistableUriPermission(uri,
                  Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
          DocumentFile documentFile = DocumentFile.fromTreeUri(getContext(), uri);
          if (documentFile == null) {
              throw new IllegalArgumentException("Unable to retrieve document tree");
          }
          String title = documentFile.getName();
          if (title == null) {
              title = getString(R.string.local_folder);
          }
          Feed dirFeed = new Feed(Feed.PREFIX_LOCAL_FOLDER + uri.toString(), null, title);
          dirFeed.setItems(Collections.emptyList());
          dirFeed.setSortOrder(SortOrder.EPISODE_TITLE_A_Z);
          Feed fromDatabase = FeedDatabaseWriter.updateFeed(getContext(), dirFeed, false);
          FeedUpdateManager.getInstance().runOnce(requireContext(), fromDatabase);
          return fromDatabase;
      }
  
      private static class AddLocalFolder extends ActivityResultContracts.OpenDocumentTree {
          @NonNull
          @Override
          public Intent createIntent(@NonNull final Context context, @Nullable final Uri input) {
              return super.createIntent(context, input)
                      .addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION
                              | Intent.FLAG_GRANT_WRITE_URI_PERMISSION
                              | Intent.FLAG_GRANT_PERSISTABLE_URI_PERMISSION);
          }
      }
  }
  