package cn.com.shoppingonline;

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

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 org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;
import org.apache.struts.action.DynaActionForm;

public final class LoginAction extends Action{  
	public ActionForward execute(
		ActionMapping mapping,
		ActionForm form,
		HttpServletRequest request,  
		HttpServletResponse response) throws Exception {
	
   		DynaActionForm loginForm = (DynaActionForm) form;         
 		String name = (String)loginForm.get("user_name");
		String psw =  (String)loginForm.get("user_pass");
		
		Member member=new DbOperate().getMember(name);
		ActionMessages errors = new ActionMessages();
      
		if (member==null){            //用戶名錯誤
			errors.add(ActionMessages.GLOBAL_MESSAGE,
				new ActionMessage("errors.loginFail"));
			if (!errors.isEmpty()) {
				saveErrors(request, errors);
			} 
  			return  mapping.findForward("toWrong");  
		}
		else{
			String dbPassword = member.getPassword();
			if (dbPassword == null || !dbPassword.equals(psw)) {  //口令錯誤
				errors.add(ActionMessages.GLOBAL_MESSAGE,
						new ActionMessage("errors.loginFail"));
				if (!errors.isEmpty()) {
					saveErrors(request, errors);
				} 
				return  mapping.findForward("toWrong");  
			}
			else{
		        HttpSession session = request.getSession();
				session.setAttribute(Constants.LOGIN_USER_KEY,member);
	   			return (mapping.findForward("toSuccess"));//登陸成功
			}
		}
	}
}