/**********************************************
    * Copyright (C) 2011 Lukas Laag
    * This file is part of svgreal.
    * 
    * svgreal is free software: you can redistribute it and/or modify
    * it under the terms of the GNU General Public License as published by
    * the Free Software Foundation, either version 3 of the License, or
    * (at your option) any later version.
    * 
   * svgreal is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   * 
   * You should have received a copy of the GNU General Public License
   * along with svgreal.  If not, see http://www.gnu.org/licenses/
   **********************************************/
  package org.vectomatic.svg.edit.client.command;
  
  import java.util.HashMap;
  import java.util.Map;
  
  import org.vectomatic.dom.svg.utils.SVGConstants;
  import org.vectomatic.svg.edit.client.model.svg.SVGElementModel;
  
  import com.extjs.gxt.ui.client.data.BeanModel;
  import com.extjs.gxt.ui.client.data.BeanModelLookup;
  import com.extjs.gxt.ui.client.store.Record;
  import com.extjs.gxt.ui.client.util.Format;
  
  /**
   * Generic class to record the edition of a property of an
   * svg element.
   * @author laaglu
   */
  public class GenericEditCommand extends CommandBase {
  	protected SVGElementModel model;
  	protected Map<String, Object> oldValues;
  	protected Map<String, Object> newValues;
  	protected String description;
  	
  	public GenericEditCommand(CommandFactoryBase factory, SVGElementModel model, Map<String, Object> oldValues, String description) {
  		super(factory);
  		this.model = model;
  		this.oldValues = oldValues;
  		this.description = description;
  		newValues = new HashMap<String, Object>();
  		for (String attrName : oldValues.keySet()) {
  			newValues.put(attrName, model.get(attrName));
  		}
  	}
  	
  	@Override
  	public String getDescription() {
  		String changes = newValues.toString();
  		return Format.substitute(description, model.get(SVGConstants.SVG_TITLE_TAG), changes.substring(1, changes.length() - 1));
  	}
  	
  	@Override
  	public void commit() {
  		changeAttributes(newValues);
  	}
  
  	@Override
  	public void rollback() {
  		changeAttributes(oldValues);
  	}
  	
  	private void changeAttributes(Map<String, Object> values) {
  		Record record = model.getRecord();
  		record.beginEdit();
  		for (Map.Entry<String, Object> entry : values.entrySet()) {
  			record.set(entry.getKey(), entry.getValue());
  		}
  		record.endEdit();
  		record.commit(false);
  	}
  	
  	@Override
  	public String toString() {
  		return getDescription();
  	}
  	
  	@Override
  	public BeanModel asModel() {
  		return BeanModelLookup.get().getFactory(GenericEditCommand.class).createModel(this);
  	}
  
  }