com.gigglinggnus.controllers.ModifyAppointmentController.java Source code

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Here is the source code for com.gigglinggnus.controllers.ModifyAppointmentController.java

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/*
 * Copyright 2015 Garret Leotta, Jonathan Lynch, Joseph Mandarino,
 *                Michael Yeung
 * 
 * This file is part of GG Testing Center Scheduler.
 * GG Testing Center Scheduler 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.
 * 
 * GG Testing Center Scheduler 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 GG Testing Center Scheduler. If not, see http://www.gnu.org/licenses/.
 */
package com.gigglinggnus.controllers;

import com.gigglinggnus.testingcenter.Course;
import java.io.File;
import java.io.IOException;

import java.util.List;
import java.util.ArrayList;
import java.util.Collections;

import java.util.stream.Collectors;

import java.time.Duration;
import java.time.Instant;
import java.time.Clock;
import java.time.ZoneId;
import java.time.LocalDateTime;

import javax.persistence.Persistence;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.TypedQuery;
import javax.persistence.NoResultException;

import javax.servlet.ServletException;
import javax.servlet.RequestDispatcher;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.json.JSONObject;
import org.json.JSONArray;

import com.gigglinggnus.testingcenter.Appointment;
import com.gigglinggnus.testingcenter.Term;
import com.gigglinggnus.testingcenter.User;
import com.gigglinggnus.testingcenter.Exam;
import com.gigglinggnus.testingcenter.Seating;

public class ModifyAppointmentController extends HttpServlet {

    public ModifyAppointmentController() {
        super();
    }

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        EntityManager em = (EntityManager) request.getSession().getAttribute("em");

        Clock clk = (Clock) (request.getSession().getAttribute("clock"));
        String userId = request.getParameter("u");
        String examId = request.getParameter("e");
        User student = em.find(User.class, userId);
        Exam exam = em.find(Exam.class, examId);
        Appointment appt = student.getAppointmentByExam(exam);

        request.setAttribute("appt", appt);

        RequestDispatcher rd = request.getRequestDispatcher("/admin/modify-apmt.jsp");
        rd.forward(request, response);
    }

    /**
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        EntityManager em = (EntityManager) request.getSession().getAttribute("em");
        Clock clk = (Clock) (request.getSession().getAttribute("clock"));

        boolean modified = false;
        String userId = request.getParameter("userid");
        User user = em.find(User.class, userId);
        String examId = request.getParameter("examid");
        Exam exam = em.find(Exam.class, examId);
        Appointment appt = user.getAppointmentByExam(exam);
        String startTime = request.getParameter("startTime");
        String seatZone = request.getParameter("seatingZone");
        String seatNum = request.getParameter("seatNum");
        String cancel = request.getParameter("cancel");
        try {
            em.getTransaction().begin();
            if (startTime != "") {
                appt.changeStartTime(Instant.parse(startTime), clk);
                em.persist(appt);
                modified = true;
            }
            if (seatZone != "") {
                appt.setSeatingZone(Seating.parse(seatZone));
                em.persist(appt);
                modified = true;
            }
            if (seatNum != "") {
                appt.setSeatNum(Integer.parseInt(seatNum));
                em.persist(appt);
                modified = true;
            }
            em.getTransaction().commit();
        } catch (Exception e) {
            em.getTransaction().rollback();
            request.setAttribute("msg", e);
            RequestDispatcher rd = request.getRequestDispatcher("/home.jsp");
            rd.forward(request, response);
        }
        if (cancel != null) {

            request.setAttribute("msg", "Appointment cancelled");
            RequestDispatcher rd = request.getRequestDispatcher("/home.jsp");
            rd.forward(request, response);
        }
        if (modified == true) {
            request.setAttribute("msg", "Appointment modified");
            RequestDispatcher rd = request.getRequestDispatcher("/home.jsp");
            rd.forward(request, response);
        } else {
            request.setAttribute("msg", "Appointment unchanged");
            RequestDispatcher rd = request.getRequestDispatcher("/home.jsp");
            rd.forward(request, response);
        }
    }
}