WIP implementing filtering by category

app/src/main/java/it/danieleverducci/nextcloudmaps/activity/main/GeofavoritesFragmentViewModel.java

@@ -5,6 +5,7 @@ import android.content.Context;
 import androidx.lifecycle.LiveData;
 import androidx.lifecycle.ViewModel;
 
+import java.util.HashSet;
 import java.util.List;
 
 import it.danieleverducci.nextcloudmaps.model.Geofavorite;
@@ -26,6 +27,10 @@ public class GeofavoritesFragmentViewModel extends ViewModel {
         mRepo.updateGeofavorites();
     }
 
+    public LiveData<HashSet<String>> getCategories(){
+        return mRepo.getCategories();
+    }
+
     public void deleteGeofavorite(Geofavorite geofav) {
         mRepo.deleteGeofavorite(geofav);
     }

app/src/main/java/it/danieleverducci/nextcloudmaps/fragments/GeofavoritesFragment.java

@@ -10,6 +10,7 @@ import android.os.Handler;
 import android.text.TextUtils;
 import android.util.Log;
 import android.view.View;
+import android.widget.ImageButton;
 import android.widget.Toast;
 
 import androidx.annotation.NonNull;
@@ -32,6 +33,8 @@ import com.squareup.picasso.Picasso;
 
 import java.io.File;
 import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.Iterator;
 import java.util.List;
 
 import it.danieleverducci.nextcloudmaps.R;
@@ -53,7 +56,9 @@ public abstract class GeofavoritesFragment extends Fragment {
     private View toolbar;
     private View homeToolbar;
     private SearchView searchView;
+    private ImageButton filterButton;
     private List<Geofavorite> geofavorites = new ArrayList<>();
+    private HashSet<String> categories = new HashSet<>();
 
     @Override
     public void onCreate(@Nullable Bundle savedInstanceState) {
@@ -87,6 +92,8 @@ public abstract class GeofavoritesFragment extends Fragment {
         // Setup toolbar/searchbar
         toolbar = view.findViewById(R.id.toolbar);
         homeToolbar = view.findViewById(R.id.home_toolbar);
+        filterButton = view.findViewById(R.id.search_filter);
+        filterButton.setOnClickListener(v -> showCategoryFilterDialog());
 
         searchView = view.findViewById(R.id.search_view);
         searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
@@ -111,6 +118,12 @@ public abstract class GeofavoritesFragment extends Fragment {
                 onDatasetChange(geofavorites);
             }
         });
+        mGeofavoritesFragmentViewModel.getCategories().observe(getViewLifecycleOwner(), new Observer<HashSet<String>>() {
+            @Override
+            public void onChanged(HashSet<String> categories) {
+                GeofavoritesFragment.this.categories = categories;
+            }
+        });
 
         searchView.setOnCloseListener(() -> {
             if (toolbar.getVisibility() == VISIBLE && TextUtils.isEmpty(searchView.getQuery())) {
@@ -205,6 +218,26 @@ public abstract class GeofavoritesFragment extends Fragment {
         ad.show();
     }
 
+    private void showCategoryFilterDialog() {
+        if (categories.isEmpty()) {
+            Toast.makeText(requireContext(), R.string.filtering_unavailable, Toast.LENGTH_SHORT).show();
+            return;
+        }
+
+        AlertDialog.Builder builder = new AlertDialog.Builder(requireContext());
+        builder.setTitle(R.string.filtering_dialog_title);
+        String[] categoryNames = categories.toArray(new String[categories.size()]);
+        builder.setItems(categoryNames, new DialogInterface.OnClickListener() {
+            @Override
+            public void onClick(DialogInterface dialog, int which) {
+                String category = categoryNames[which];
+                Log.d(TAG, "Selected category " + category);
+            }
+        });
+        AlertDialog dialog = builder.create();
+        dialog.show();
+    }
+
     private void updateToolbars(boolean disableSearch) {
         homeToolbar.setVisibility(disableSearch ? VISIBLE : GONE);
         toolbar.setVisibility(disableSearch ? GONE : VISIBLE);

app/src/main/res/drawable/ic_filter.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#FFFFFF"
+    android:viewportHeight="24" android:viewportWidth="24"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@android:color/white" android:pathData="M4.25,5.61C6.27,8.2 10,13 10,13v6c0,0.55 0.45,1 1,1h2c0.55,0 1,-0.45 1,-1v-6c0,0 3.72,-4.8 5.74,-7.39C20.25,4.95 19.78,4 18.95,4H5.04C4.21,4 3.74,4.95 4.25,5.61z"/>
+</vector>

app/src/main/res/drawable/ic_filter_off.xml

@@ -0,0 +1,6 @@
+<vector android:height="24dp" android:tint="#FFFFFF"
+    android:viewportHeight="24" android:viewportWidth="24"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@android:color/white" android:pathData="M19.79,5.61C20.3,4.95 19.83,4 19,4H6.83l7.97,7.97L19.79,5.61z"/>
+    <path android:fillColor="@android:color/white" android:pathData="M2.81,2.81L1.39,4.22L10,13v6c0,0.55 0.45,1 1,1h2c0.55,0 1,-0.45 1,-1v-2.17l5.78,5.78l1.41,-1.41L2.81,2.81z"/>
+</vector>

app/src/main/res/layout/app_toolbar.xml

@@ -71,6 +71,15 @@
                 android:textSize="16sp"
                 android:text="@string/search_in_all"/>
 
+            <!-- Filter button -->
+            <ImageButton
+                android:id="@+id/search_filter"
+                android:layout_width="?android:attr/actionBarSize"
+                android:layout_height="?android:attr/actionBarSize"
+                android:src="@drawable/ic_filter_off"
+                app:tint="@color/inactive"
+                android:background="@color/transparent"/>
+
             <!-- User badge -->
             <FrameLayout
                 android:id="@+id/user_badge_container"

app/src/main/res/values-it/strings.xml

@@ -43,6 +43,8 @@
     <string name="dialog_logout_message">Vuoi cambiare account?</string>
     <string name="list_geofavorite_deleted">Geosegnalibro eliminato</string>
     <string name="list_geofavorite_connection_error">Impossibile ottenere la lista dei geosegnalibri</string>
+    <string name="filtering_unavailable">Il filtro per categoria non è disponibile al momento</string>
+    <string name="filtering_dialog_title">Filtra per categoria</string>
 
     <!-- Sort dialog -->
     <string name="sort_by">Ordina per</string>

app/src/main/res/values/strings.xml

@@ -42,6 +42,8 @@
     <string name="dialog_logout_message">Do you want to switch account?</string>
     <string name="list_geofavorite_deleted">Geofavorite deleted</string>
     <string name="list_geofavorite_connection_error">Unable to obtain geofavorites list</string>
+    <string name="filtering_unavailable">Category filtering is unavailable at the moment</string>
+    <string name="filtering_dialog_title">Filter by category</string>
 
     <!-- Sort dialog -->
     <string name="sort_by">Sort by</string>