com.gigglinggnus.controllers.DisplayUtilizationController.java Source code

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Here is the source code for com.gigglinggnus.controllers.DisplayUtilizationController.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.LocalDate;

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;

public class DisplayUtilizationController extends HttpServlet {

    public DisplayUtilizationController() {
        super();
    }

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

        RequestDispatcher rd = request.getRequestDispatcher("/admin/display-utilization.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 {
        String msg = request.getParameter("msg");
        EntityManager em = (EntityManager) request.getSession().getAttribute("em");
        Clock clk = (Clock) (request.getSession().getAttribute("clock"));
        Term term = Term.getTermforInstant(em, Instant.now(clk));
        LocalDate start = LocalDate.parse(request.getParameter("start"));
        LocalDate end = LocalDate.parse(request.getParameter("end"));

        JSONArray json = new JSONArray();
        for (LocalDate i = start; i.isBefore(end); i = i.plusDays(1)) {
            double utilization = term.utilizationForDay(start, clk);
            JSONObject elem = new JSONObject();
            elem.put("day", i);
            elem.put("utilization", utilization);
            json.put(elem);
        }
        response.getWriter().write(json.toString());
    }

}