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package org.tinygroup.menucommand.handler;

import org.tinygroup.commons.tools.StringUtil;
import org.tinygroup.context.Context;
import org.tinygroup.menucommand.MenuCommandConstants;
import org.tinygroup.menucommand.config.MenuCommand;
import org.tinygroup.menucommand.config.MenuConfig;
import org.tinygroup.menucommand.config.SystemCommand;

/**
 * 默认的命令展示handler
 * @author yancheng11334
 *
 */
public class ShowCommandHandler extends SystemCommandHandler{

	protected void execute(String command, SystemCommand systemCommand,
			MenuConfig config, Context context) {
		//存在用户菜单路径
		if(config!=null && !StringUtil.isEmpty(config.getPath())){
		   context.put(MenuCommandConstants.RENDER_PAGE_PATH_NAME, config.getPath());
		}
		dealEnterEvent(command,config,context);
		context.put(MenuCommandConstants.GOTO_MENU_ID_NAME, config.getId());
		context.put(MenuCommandConstants.MENU_CONFIG_PAGE_NAME, config);
	}
	
	/**
	 * 只有满足菜单位置发生变动和用户配置Enter事件处理器才执行
	 * @param config
	 * @param context
	 */
	protected void dealEnterEvent(String command,MenuConfig config, Context context){
		String oldMenuId = context.get(MenuCommandConstants.BEFORE_MENU_ID_NAME);
		//菜单发生变动
		if(!config.getId().equals(oldMenuId)){
			MenuCommand menuCommand = config.matchEvent(MenuCommandConstants.ENTER_EVENT_TYPE);
			if(menuCommand!=null){
				MenuCommandHandler handler = menuCommand.createCommandObject();
				if(handler!=null){
					//执行操作
					handler.execute(command, menuCommand, context);
					//存在子操作的菜单路径
					if(!StringUtil.isEmpty(menuCommand.getPath())){
					   context.put(MenuCommandConstants.RENDER_PAGE_PATH_NAME, menuCommand.getPath());
					}
				}
				
			}
			
		}
	}

}