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package it.niedermann.nextcloud.deck.ui.view.labellayout;
import android.content.Context;
import android.util.AttributeSet;
import androidx.annotation.NonNull;
import androidx.annotation.Px;
import com.google.android.flexbox.FlexboxLayout;
import java.util.LinkedList;
import java.util.List;
import it.niedermann.nextcloud.deck.DeckLog;
import it.niedermann.nextcloud.deck.R;
import it.niedermann.nextcloud.deck.model.Label;
import it.niedermann.nextcloud.deck.ui.view.labelchip.LabelChip;
public abstract class LabelLayout extends FlexboxLayout {
@Px
final protected int gutter;
@NonNull
final private List<LabelChip> chipList = new LinkedList<>();
public LabelLayout(Context context, AttributeSet attrs) {
super(context, attrs);
this.gutter = context.getResources().getDimensionPixelSize(R.dimen.spacer_1hx);
}
/**
* Instead of clearing and adding all labels, one can use this method to avoid flickering
*/
public void updateLabels(@NonNull List<Label> labels) {
removeObsoleteLabels(labels);
addNewLabels(labels);
}
@Override
public void removeAllViews() {
super.removeAllViews();
this.chipList.clear();
}
@Override
public void removeViewAt(int index) {
// TODO this should also remove the item from chipList
DeckLog.logError(new UnsupportedOperationException("Not implemented yet"));
super.removeViewAt(index);
}
/**
* Remove all labels from the view which are not in the labels list
*/
private void removeObsoleteLabels(List<Label> labels) {
chipList:
for (int i = 0; i < chipList.size(); i++) {
final var currentChip = chipList.get(i);
final var existingLabel = currentChip.getLabel();
for (final var label : labels) {
if (existingLabel.equals(label)) {
continue chipList;
}
}
super.removeViewAt(i);
chipList.remove(currentChip);
i--;
}
}
/**
* Add all labels to the view which are not yet in the view but in the labels list
*/
private void addNewLabels(List<Label> labels) {
int oldLabelSize = chipList.size();
labelList:
for (final var label : labels) {
for (int i = 0; i < oldLabelSize; i++) {
final var currentChip = chipList.get(i);
final var existingLabel = currentChip.getLabel();
if (existingLabel.equals(label)) {
continue labelList;
}
}
final var chip = createLabelChip(label);
addView(chip);
chipList.add(chip);
}
}
protected abstract LabelChip createLabelChip(@NonNull Label label);
}
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