package com.air.action;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

import com.air.constants.AppConstants;
import com.air.form.AbstractBaseForm;
import com.air.model.LoginUser;
import com.air.util.SessionManager;
import com.air.util.VacDateUtil;
import com.air.util.ValHelper;

public abstract class AbstractBaseAction extends Action
{
	private static Log log = LogFactory.getLog(AbstractBaseAction.class);
	/**
	 * @see org.apache.struts.action.Action#execute(org.apache.struts.action.ActionMapping, org.apache.struts.action.ActionForm, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
	 */
	public final ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception
	{
		try
		{
			log.debug("execute() invoked");
			log.debug("request url: [" + getRequestURL(request) + "]");
			if( SessionManager.getInstance().isTimeOut(request) )
			{
				return mapping.findForward("login");
			}
			LoginUser loginuser = getLoginuser(request);
			if( loginuser == null )
			{
				return mapping.findForward("login");
			}
			setCurrentyear(  form );
			return executeAction(mapping, form, request, response);
		}
		catch (Exception ex )
		{
			log.debug("execute() -- caught exception : ", ex );
			request.setAttribute(AppConstants.ATTR_EXCEPTION, ex);
			return mapping.findForward("systemerror");
		}
		finally
		{
			log.debug("execute() completed");
		}
	}
	/**
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return
	 * @throws Exception
	 */
	protected abstract ActionForward executeAction(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception;
	/**
	 * @param request
	 * @return
	 */
	protected String getRequestURL(HttpServletRequest request)
	{
		String servletpath = request.getServletPath();
		String querystring = request.getQueryString();
		if( ValHelper.getInstance().isNotNullAndEmpty(querystring) )
		{
			return servletpath + "?" + querystring;
		}
		else		
		{
			return servletpath;
		}
	}
	protected LoginUser getLoginuser(HttpServletRequest request)
	{
		return SessionManager.getInstance().getSessionUser(request);
	}

	protected void setCurrentyear( ActionForm form )
	{
		if( form instanceof AbstractBaseForm)
		{
			AbstractBaseForm baseform = (AbstractBaseForm)form;
			int curyear = VacDateUtil.getInstance().getCurrentYear();
			baseform.setCuryear(curyear);
		}
	}
}