#615 Add filter "No tags"

3 files changed, 49 insertions, 6 deletions

diff --git a/app/src/main/java/it/niedermann/nextcloud/deck/ui/filter/FilterLabelsAdapter.java b/app/src/main/java/it/niedermann/nextcloud/deck/ui/filter/FilterLabelsAdapter.java
index 096f0db9c..17d3599e7 100644
--- a/app/src/main/java/it/niedermann/nextcloud/deck/ui/filter/FilterLabelsAdapter.java
+++ b/app/src/main/java/it/niedermann/nextcloud/deck/ui/filter/FilterLabelsAdapter.java
@@ -7,11 +7,13 @@ import android.view.ViewGroup;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
+import androidx.core.content.ContextCompat;
 import androidx.recyclerview.widget.RecyclerView;
 
 import java.util.ArrayList;
 import java.util.List;
 
+import it.niedermann.nextcloud.deck.R;
 import it.niedermann.nextcloud.deck.databinding.ItemFilterLabelBinding;
 import it.niedermann.nextcloud.deck.model.Label;
 import it.niedermann.nextcloud.deck.util.ColorUtil;
@@ -23,11 +25,16 @@ public class FilterLabelsAdapter extends RecyclerView.Adapter<FilterLabelsAdapte
     @NonNull
     private final List<Label> selectedLabels = new ArrayList<>();
     @Nullable
+    private static final Label NOT_ASSIGNED = null;
+    @Nullable
     private final SelectionListener<Label> selectionListener;
 
-    public FilterLabelsAdapter(@NonNull List<Label> labels, @NonNull List<Label> selectedLabels, @Nullable SelectionListener<Label> selectionListener) {
+    public FilterLabelsAdapter(@NonNull List<Label> labels, @NonNull List<Label> selectedLabels, boolean noAssignedLabel, @Nullable SelectionListener<Label> selectionListener) {
         super();
         this.labels.addAll(labels);
+        if (noAssignedLabel) {
+            this.selectedLabels.add(NOT_ASSIGNED);
+        }
         this.selectedLabels.addAll(selectedLabels);
         this.selectionListener = selectionListener;
         setHasStableIds(true);
@@ -47,7 +54,13 @@ public class FilterLabelsAdapter extends RecyclerView.Adapter<FilterLabelsAdapte
 
     @Override
     public void onBindViewHolder(@NonNull LabelViewHolder viewHolder, int position) {
+        final Label label = labels.get(position);
         viewHolder.bind(labels.get(position));
+        if (position == 0) {
+            viewHolder.bindNotAssigned(label);
+        } else {
+            viewHolder.bind(label);
+        }
     }
 
     @Override
@@ -74,7 +87,19 @@ public class FilterLabelsAdapter extends RecyclerView.Adapter<FilterLabelsAdapte
             final int color = ColorUtil.getForegroundColorForBackgroundColor(labelColor);
             binding.label.setTextColor(color);
             itemView.setSelected(selectedLabels.contains(label));
+            bindClickListener(label);
+        }
+
+        public void bindNotAssigned(Label label) {
+            binding.label.setText(itemView.getContext().getString(R.string.no_assigned_label));
+            binding.label.setTextColor(ColorStateList.valueOf(ContextCompat.getColor(itemView.getContext(), R.color.accent)));
+            binding.label.setChipIcon(ContextCompat.getDrawable(itemView.getContext(), R.drawable.ic_baseline_block_24));
+            binding.label.setChipBackgroundColor(ColorStateList.valueOf(ContextCompat.getColor(itemView.getContext(), android.R.color.transparent)));
+            binding.label.setRippleColor(null);
+            bindClickListener(label);
+        }
 
+        private void bindClickListener(@Nullable Label label) {
             itemView.setOnClickListener(view -> {
                 if (selectedLabels.contains(label)) {
                     selectedLabels.remove(label);
diff --git a/app/src/main/java/it/niedermann/nextcloud/deck/ui/filter/FilterLabelsFragment.java b/app/src/main/java/it/niedermann/nextcloud/deck/ui/filter/FilterLabelsFragment.java
index 357f93cf9..fadf33b88 100644
--- a/app/src/main/java/it/niedermann/nextcloud/deck/ui/filter/FilterLabelsFragment.java
+++ b/app/src/main/java/it/niedermann/nextcloud/deck/ui/filter/FilterLabelsFragment.java
@@ -33,19 +33,31 @@ public class FilterLabelsFragment extends Fragment implements SelectionListener<
 
         observeOnce(new SyncManager(requireContext()).findProposalsForLabelsToAssign(mainViewModel.getCurrentAccount().getId(), mainViewModel.getCurrentBoardLocalId()), requireActivity(), (labels) -> {
             binding.labels.setNestedScrollingEnabled(false);
-            binding.labels.setAdapter(new FilterLabelsAdapter(labels, requireNonNull(filterViewModel.getFilterInformationDraft().getValue()).getLabels(), this));
+            binding.labels.setAdapter(new FilterLabelsAdapter(
+                    labels,
+                    requireNonNull(filterViewModel.getFilterInformationDraft().getValue()).getLabels(),
+                    requireNonNull(filterViewModel.getFilterInformationDraft().getValue()).isNoAssignedLabel(),
+                    this));
         });
 
         return binding.getRoot();
     }
 
     @Override
-    public void onItemSelected(Label item) {
-        filterViewModel.addFilterInformationDraftLabel(item);
+    public void onItemSelected(@Nullable Label item) {
+        if (item == null) {
+            filterViewModel.setNotAssignedLabel(true);
+        } else {
+            filterViewModel.addFilterInformationDraftLabel(item);
+        }
     }
 
     @Override
-    public void onItemDeselected(Label item) {
-        filterViewModel.removeFilterInformationLabel(item);
+    public void onItemDeselected(@Nullable Label item) {
+        if (item == null) {
+            filterViewModel.setNotAssignedLabel(false);
+        } else {
+            filterViewModel.removeFilterInformationLabel(item);
+        }
     }
 }
diff --git a/app/src/main/java/it/niedermann/nextcloud/deck/ui/filter/FilterViewModel.java b/app/src/main/java/it/niedermann/nextcloud/deck/ui/filter/FilterViewModel.java
index 121df3387..50f287d62 100644
--- a/app/src/main/java/it/niedermann/nextcloud/deck/ui/filter/FilterViewModel.java
+++ b/app/src/main/java/it/niedermann/nextcloud/deck/ui/filter/FilterViewModel.java
@@ -72,6 +72,12 @@ public class FilterViewModel extends ViewModel {
         this.filterInformationDraft.postValue(newDraft);
     }
 
+    public void setNotAssignedLabel(boolean notAssignedLabel) {
+        FilterInformation newDraft = new FilterInformation(filterInformationDraft.getValue());
+        newDraft.setNoAssignedLabel(notAssignedLabel);
+        this.filterInformationDraft.postValue(newDraft);
+    }
+
     public void removeFilterInformationLabel(@NonNull Label label) {
         FilterInformation newDraft = new FilterInformation(filterInformationDraft.getValue());
         newDraft.removeLabel(label);