package by.autoServiceStation.controller;

import by.autoServiceStation.navigation.Command;

import by.autoServiceStation.navigation.CommandFactory;

import static by.autoServiceStation.resources.constants.Constants.PARAM_COMMAND;

import javax.servlet.RequestDispatcher;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import java.io.IOException;

public class Controller extends HttpServlet {

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

performAction(request, response);

}

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

performAction(request, response);

}

private void performAction(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

String currentCommand = request.getParameter(PARAM_COMMAND);

Command command = CommandFactory.getCommand(currentCommand.toUpperCase());

String nextPage = command.execute(request, response);

if (!response.isCommitted()) {

RequestDispatcher requestDispatcher = request.getRequestDispatcher(nextPage);

requestDispatcher.forward(request, response);

}

}

}