Implemented filter function for "All Episodes" list (#3321)

5 files changed, 136 insertions, 39 deletions

diff --git a/app/src/main/java/de/danoeh/antennapod/dialog/FilterDialog.java b/app/src/main/java/de/danoeh/antennapod/dialog/FilterDialog.java
new file mode 100644
index 000000000..607084c42
--- /dev/null
+++ b/app/src/main/java/de/danoeh/antennapod/dialog/FilterDialog.java
@@ -0,0 +1,62 @@
+package de.danoeh.antennapod.dialog;
+
+import android.content.Context;
+import android.support.v7.app.AlertDialog;
+import android.text.TextUtils;
+
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Set;
+
+import de.danoeh.antennapod.R;
+import de.danoeh.antennapod.core.feed.FeedItemFilter;
+
+public abstract class FilterDialog {
+
+    protected FeedItemFilter filter;
+    protected Context context;
+
+    public FilterDialog(Context context, FeedItemFilter feedItemFilter) {
+        this.context = context;
+        this.filter = feedItemFilter;
+    }
+
+    public void openDialog() {
+        final String[] items = context.getResources().getStringArray(R.array.episode_filter_options);
+        final String[] values = context.getResources().getStringArray(R.array.episode_filter_values);
+        final boolean[] checkedItems = new boolean[items.length];
+
+        final Set<String> filterValues = new HashSet<>(Arrays.asList(filter.getValues()));
+
+        // make sure we have no empty strings in the filter list
+        for (String filterValue : filterValues) {
+            if (TextUtils.isEmpty(filterValue)) {
+                filterValues.remove(filterValue);
+            }
+        }
+
+        for (int i = 0; i < values.length; i++) {
+            String value = values[i];
+            if (filterValues.contains(value)) {
+                checkedItems[i] = true;
+            }
+        }
+
+        AlertDialog.Builder builder = new AlertDialog.Builder(context);
+        builder.setTitle(R.string.filter);
+        builder.setMultiChoiceItems(items, checkedItems, (dialog, which, isChecked) -> {
+            if (isChecked) {
+                filterValues.add(values[which]);
+            } else {
+                filterValues.remove(values[which]);
+            }
+        });
+        builder.setPositiveButton(R.string.confirm_label, (dialog, which) -> {
+            updateFilter(filterValues);
+        });
+        builder.setNegativeButton(R.string.cancel_label, null);
+        builder.create().show();
+    }
+
+    protected abstract void updateFilter(Set<String> filterValues);
+}
diff --git a/app/src/main/java/de/danoeh/antennapod/fragment/AllEpisodesFragment.java b/app/src/main/java/de/danoeh/antennapod/fragment/AllEpisodesFragment.java
index 62d798cf6..41fc523d7 100644
--- a/app/src/main/java/de/danoeh/antennapod/fragment/AllEpisodesFragment.java
+++ b/app/src/main/java/de/danoeh/antennapod/fragment/AllEpisodesFragment.java
@@ -21,8 +21,10 @@ import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.ProgressBar;
+import android.widget.TextView;
 import android.widget.Toast;
 
+import com.joanzapata.iconify.Iconify;
 import com.yqritc.recyclerviewflexibledivider.HorizontalDividerItemDecoration;
 
 import org.greenrobot.eventbus.EventBus;
@@ -31,6 +33,7 @@ import org.greenrobot.eventbus.ThreadMode;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Set;
 
 import de.danoeh.antennapod.R;
 import de.danoeh.antennapod.activity.MainActivity;
@@ -42,6 +45,7 @@ import de.danoeh.antennapod.core.event.FeedItemEvent;
 import de.danoeh.antennapod.core.feed.EventDistributor;
 import de.danoeh.antennapod.core.feed.Feed;
 import de.danoeh.antennapod.core.feed.FeedItem;
+import de.danoeh.antennapod.core.feed.FeedItemFilter;
 import de.danoeh.antennapod.core.feed.FeedMedia;
 import de.danoeh.antennapod.core.preferences.UserPreferences;
 import de.danoeh.antennapod.core.service.download.DownloadRequest;
@@ -53,6 +57,7 @@ import de.danoeh.antennapod.core.storage.DBWriter;
 import de.danoeh.antennapod.core.storage.DownloadRequester;
 import de.danoeh.antennapod.core.util.FeedItemUtil;
 import de.danoeh.antennapod.core.util.LongList;
+import de.danoeh.antennapod.dialog.FilterDialog;
 import de.danoeh.antennapod.menuhandler.FeedItemMenuHandler;
 import de.danoeh.antennapod.menuhandler.MenuItemUtils;
 import de.danoeh.antennapod.view.EmptyViewHandler;
@@ -93,6 +98,9 @@ public class AllEpisodesFragment extends Fragment {
     Disposable disposable;
     private LinearLayoutManager layoutManager;
 
+    protected TextView txtvInformation;
+    private static FeedItemFilter feedItemFilter = new FeedItemFilter("");
+
     boolean showOnlyNewEpisodes() {
         return false;
     }
@@ -246,6 +254,9 @@ public class AllEpisodesFragment extends Fragment {
                     };
                     removeAllNewFlagsConfirmationDialog.createNewDialog().show();
                     return true;
+                case R.id.filter_items:
+                    showFilterDialog();
+                    return true;
                 default:
                     return false;
             }
@@ -292,6 +303,7 @@ public class AllEpisodesFragment extends Fragment {
     public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
         super.onCreateView(inflater, container, savedInstanceState);
         View root = inflater.inflate(R.layout.all_episodes_fragment, container, false);
+        txtvInformation = root.findViewById(R.id.txtvInformation);
 
         layoutManager = new LinearLayoutManager(getActivity());
         recyclerView = root.findViewById(android.R.id.list);
@@ -320,14 +332,21 @@ public class AllEpisodesFragment extends Fragment {
         return root;
     }
 
-    private void onFragmentLoaded(List<FeedItem> episodes) {
-        this.episodes = episodes;
+    protected void onFragmentLoaded(List<FeedItem> episodes) {
         listAdapter.notifyDataSetChanged();
 
         if (episodes.size() == 0) {
             createRecycleAdapter(recyclerView, emptyView);
         }
 
+        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);
+        }
+
         restoreScrollPosition();
         requireActivity().invalidateOptionsMenu();
     }
@@ -458,13 +477,14 @@ public class AllEpisodesFragment extends Fragment {
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(data -> {
                     progLoading.setVisibility(View.GONE);
-                    onFragmentLoaded(data);
+                    episodes = data;
+                    onFragmentLoaded(episodes);
                 }, error -> Log.e(TAG, Log.getStackTraceString(error)));
     }
 
     @NonNull
     List<FeedItem> loadData() {
-        return DBReader.getRecentlyPublishedEpisodes(RECENT_EPISODES_LIMIT);
+        return feedItemFilter.filter( DBReader.getRecentlyPublishedEpisodes(RECENT_EPISODES_LIMIT) );
     }
 
     void removeNewFlagWithUndo(FeedItem item) {
@@ -498,4 +518,16 @@ public class AllEpisodesFragment extends Fragment {
         snackbar.show();
         h.postDelayed(r, (int) Math.ceil(snackbar.getDuration() * 1.05f));
     }
+
+    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();
+    }
 }
diff --git a/app/src/main/java/de/danoeh/antennapod/fragment/FavoriteEpisodesFragment.java b/app/src/main/java/de/danoeh/antennapod/fragment/FavoriteEpisodesFragment.java
index bb029b731..7a22cb1eb 100644
--- a/app/src/main/java/de/danoeh/antennapod/fragment/FavoriteEpisodesFragment.java
+++ b/app/src/main/java/de/danoeh/antennapod/fragment/FavoriteEpisodesFragment.java
@@ -7,6 +7,7 @@ import android.support.v7.widget.RecyclerView;
 import android.support.v7.widget.helper.ItemTouchHelper;
 import android.util.Log;
 import android.view.LayoutInflater;
+import android.view.Menu;
 import android.view.View;
 import android.view.ViewGroup;
 
@@ -84,6 +85,19 @@ public class FavoriteEpisodesFragment extends AllEpisodesFragment {
         return root;
     }
 
+    @Override
+    public void onPrepareOptionsMenu(Menu menu) {
+        super.onPrepareOptionsMenu(menu);
+
+        menu.removeItem(R.id.filter_items);
+    }
+
+    @Override
+    protected void onFragmentLoaded(List<FeedItem> episodes) {
+        super.onFragmentLoaded(episodes);
+        txtvInformation.setVisibility(View.GONE);
+    }
+
     @NonNull
     @Override
     protected List<FeedItem> loadData() {
diff --git a/app/src/main/java/de/danoeh/antennapod/fragment/NewEpisodesFragment.java b/app/src/main/java/de/danoeh/antennapod/fragment/NewEpisodesFragment.java
index 1bf907aee..eaa385fa5 100644
--- a/app/src/main/java/de/danoeh/antennapod/fragment/NewEpisodesFragment.java
+++ b/app/src/main/java/de/danoeh/antennapod/fragment/NewEpisodesFragment.java
@@ -5,6 +5,7 @@ import android.support.annotation.NonNull;
 import android.support.v7.widget.RecyclerView;
 import android.support.v7.widget.helper.ItemTouchHelper;
 import android.view.LayoutInflater;
+import android.view.Menu;
 import android.view.View;
 import android.view.ViewGroup;
 
@@ -92,6 +93,19 @@ public class NewEpisodesFragment extends AllEpisodesFragment {
         return root;
     }
 
+    @Override
+    public void onPrepareOptionsMenu(Menu menu) {
+        super.onPrepareOptionsMenu(menu);
+
+        menu.removeItem(R.id.filter_items);
+    }
+
+    @Override
+    protected void onFragmentLoaded(List<FeedItem> episodes) {
+        super.onFragmentLoaded(episodes);
+        txtvInformation.setVisibility(View.GONE);
+    }
+
     @NonNull
     @Override
     protected List<FeedItem> loadData() {
diff --git a/app/src/main/java/de/danoeh/antennapod/menuhandler/FeedMenuHandler.java b/app/src/main/java/de/danoeh/antennapod/menuhandler/FeedMenuHandler.java
index 0928cfd62..3949119fc 100644
--- a/app/src/main/java/de/danoeh/antennapod/menuhandler/FeedMenuHandler.java
+++ b/app/src/main/java/de/danoeh/antennapod/menuhandler/FeedMenuHandler.java
@@ -20,11 +20,13 @@ import java.util.Set;
 import de.danoeh.antennapod.R;
 import de.danoeh.antennapod.core.dialog.ConfirmationDialog;
 import de.danoeh.antennapod.core.feed.Feed;
+import de.danoeh.antennapod.core.feed.FeedItemFilter;
 import de.danoeh.antennapod.core.storage.DBTasks;
 import de.danoeh.antennapod.core.storage.DBWriter;
 import de.danoeh.antennapod.core.storage.DownloadRequestException;
 import de.danoeh.antennapod.core.util.IntentUtils;
 import de.danoeh.antennapod.core.util.ShareUtils;
+import de.danoeh.antennapod.dialog.FilterDialog;
 
 /**
  * Handles interactions with the FeedItemMenu.
@@ -105,42 +107,15 @@ public class FeedMenuHandler {
         return true;
     }
 
-    private static void showFilterDialog(final Context context, final Feed feed) {
-        final String[] items = context.getResources().getStringArray(R.array.episode_filter_options);
-        final String[] values = context.getResources().getStringArray(R.array.episode_filter_values);
-        final boolean[] checkedItems = new boolean[items.length];
-
-        final Set<String> filter = new HashSet<>(Arrays.asList(feed.getItemFilter().getValues()));
-        Iterator<String> it = filter.iterator();
-        while(it.hasNext()) {
-            // make sure we have no empty strings in the filter list
-            if(TextUtils.isEmpty(it.next())) {
-                it.remove();
-            }
-        }
-        for(int i=0; i < values.length; i++) {
-            String value = values[i];
-            if(filter.contains(value)) {
-                checkedItems[i] = true;
+    private static void showFilterDialog(Context context, Feed selectedFeed) {
+        FilterDialog filterDialog = new FilterDialog(context, selectedFeed.getItemFilter()) {
+            @Override
+            protected void updateFilter(Set<String> filterValues) {
+                selectedFeed.setItemFilter(filterValues.toArray(new String[filterValues.size()]));
+                DBWriter.setFeedItemsFilter(selectedFeed.getId(), filterValues);
             }
-        }
-
-        AlertDialog.Builder builder = new AlertDialog.Builder(context);
-        builder.setTitle(R.string.filter);
-        builder.setMultiChoiceItems(items, checkedItems, (dialog, which, isChecked) -> {
-            if (isChecked) {
-                filter.add(values[which]);
-            } else {
-                filter.remove(values[which]);
-            }
-        });
-        builder.setPositiveButton(R.string.confirm_label, (dialog, which) -> {
-            feed.setItemFilter(filter.toArray(new String[filter.size()]));
-            DBWriter.setFeedItemsFilter(feed.getId(), filter);
-        });
-        builder.setNegativeButton(R.string.cancel_label, null);
-        builder.create().show();
+        };
 
+        filterDialog.openDialog();
     }
-
 }