package org.simantics.modeling;

import org.simantics.db.Resource;
import org.simantics.db.WriteGraph;
import org.simantics.db.common.CommentMetadata;
import org.simantics.db.common.utils.NameUtils;
import org.simantics.db.exception.DatabaseException;
import org.simantics.db.layer0.adapter.impl.EntityNameModifier;
import org.simantics.db.layer0.adapter.impl.EntityStringModifierFactory;
import org.simantics.layer0.Layer0;

public class Rename {
	
    public static String renameNode (WriteGraph graph, Resource node, String newName) throws DatabaseException {
    	
    	Layer0 L0 = Layer0.getInstance(graph);
    	Resource previousName = graph.getPossibleObject(node, L0.HasName);
    	String nodeName = NameUtils.getSafeName(graph, node);
    	EntityStringModifierFactory factory = new EntityStringModifierFactory(node);
    	EntityNameModifier modifier = (EntityNameModifier) factory.createModifier(graph, L0.HasName, previousName);
    	
    	String error = modifier.isValid(newName);
    	if (error != null) {
    		return error;
    	}
    	
    	modifier.modify(graph, newName);
    	
    	CommentMetadata cm = graph.getMetadata(CommentMetadata.class);
    	graph.addMetadata(cm.add("Renamed node " + nodeName + ", resource  " + node +  ", to " + newName));
    	
		return "Succesfully renamed "+ nodeName + " to " + newName;
    }
    
}