at.jku.ce.adaptivetesting.vaadin.ui.core.VaadinUI.java Source code

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Here is the source code for at.jku.ce.adaptivetesting.vaadin.ui.core.VaadinUI.java

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package at.jku.ce.adaptivetesting.vaadin.ui.core;

/*This file is part of the project "Reisisoft Adaptive Testing",
 * which is licenced under LGPL v3+. You may find a copy in the source,
 * or obtain one at http://www.gnu.org/licenses/lgpl-3.0-standalone.html */
import java.io.File;
import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;

import at.jku.ce.adaptivetesting.ProductData;
import at.jku.ce.adaptivetesting.core.LogHelper;
import at.jku.ce.adaptivetesting.html.HtmlLabel;
import at.jku.ce.adaptivetesting.html.HtmlUtils;
import at.jku.ce.adaptivetesting.vaadin.ui.*;
import at.jku.ce.adaptivetesting.vaadin.ui.topic.accounting.AccountingQuestionManager;

import com.vaadin.annotations.PreserveOnRefresh;
import com.vaadin.annotations.Theme;
import com.vaadin.annotations.Title;
import com.vaadin.annotations.VaadinServletConfiguration;
import com.vaadin.navigator.Navigator;
import com.vaadin.navigator.ViewChangeListener.ViewChangeEvent;
import com.vaadin.server.Page;
import com.vaadin.server.VaadinRequest;
import com.vaadin.server.VaadinServlet;
import com.vaadin.ui.Alignment;
import com.vaadin.ui.Button;
import com.vaadin.ui.UI;
import sun.rmi.runtime.Log;

@SuppressWarnings("serial")
@Theme("vaadin")
@PreserveOnRefresh
@Title("Loading page...")
public class VaadinUI extends UI {
    private Navigator navigator;

    public VaadinUI() {
        // Set up the Navigator
        navigator = new Navigator(this, this);

        // Create Welcome Screen
        MainUI mainScreen = new MainUI();
        mainScreen.setMargin(true);
        Button start = new Button("Start", e -> {
            navigator.navigateTo(Views.TEST.toString());
        });
        start.setWidth("40%");
        start.setHeight("40%");
        //mainScreen.addComponent(new HtmlLabel(HtmlUtils.center("h1", "Willkommen zur " + productData)));
        mainScreen.addComponent(new HtmlLabel(HtmlUtils.center("h2", "Bitte klicke den <b>" + start.getCaption()
                + "</b> Button um mit dem Rechnungswesentest zu beginnen!")));
        mainScreen.addComponent(start);
        mainScreen.setComponentAlignment(start, Alignment.MIDDLE_CENTER);

        navigator.addView(Views.DEFAULT.toString(), mainScreen);
        // Question view
        // Change this to the questionManager you like
        final QuestionManager manager = new AccountingQuestionManager("Rechnungswesentest");
        navigator.addView(Views.TEST.toString(), manager);
        navigator.addView(Views.Log.toString(), new LogView(new File(Servlet.getLogFileName())));
        navigator.addView(Views.Admin.toString(), new AdminView(manager));
        navigator.addView(Views.Results.toString(), new ResultView(manager));
        navigator.setErrorView(mainScreen);
        LogHelper.logInfo("Startup completed");
    }

    @WebServlet(value = "/*", asyncSupported = true)
    @VaadinServletConfiguration(productionMode = false, ui = VaadinUI.class)
    public static class Servlet extends VaadinServlet {
        @Override
        protected void servletInitialized() throws ServletException {
            super.servletInitialized();
            // Get the question folder as defined in WEB-INF/web.xml
            questionFolderName = getServletConfig().getServletContext().getInitParameter(questionFolderKey);
            File fQf = new File(questionFolderName);
            boolean isWorking = fQf.exists() && fQf.isDirectory() || fQf.mkdirs();
            if (!isWorking) {
                questionFolderName = null;
            }
            // Get the result folder as defined in WEB-INF/web.xml
            resultFolderName = getServletConfig().getServletContext().getInitParameter(resultFolderKey);
            File fRf = new File(resultFolderName);
            isWorking = fRf.exists() && fRf.isDirectory() || fRf.mkdirs();
            if (!isWorking) {
                resultFolderName = null;
            }
            // Get the log location as defined in WEB-INF/web.xml
            logLocation = getServletConfig().getServletContext().getInitParameter(logLocKey);
            File fLog = new File(logLocation);
            try {
                isWorking = fLog.exists() && fLog.isFile() || fLog.createNewFile();
            } catch (IOException e) {
                isWorking = false;
            }
            if (!isWorking) {
                logLocation = null;
            }
        }

        private static String questionFolderName = null, logLocation = null, resultFolderName = null;
        private final static String questionFolderKey = "at.jku.ce.adaptivetesting.questionfolder";
        private final static String resultFolderKey = "at.jku.ce.adaptivetesting.resultfolder";
        private final static String logLocKey = "at.jku.ce.adaptivetesting.logfilepath";

        /**
         * Gets the question folder name
         *
         * @return NULL if not set, or the String is not a valid folder / a
         *         folder at this location could not be created.
         */
        public static String getQuestionFolderName() {
            return questionFolderName;
        }

        public static String getResultFolderName() {
            return resultFolderName;
        }

        /**
         * Gets the Log location
         *
         * @return NULL if not set, or the String is not a valid file / a file
         *         at this location could not be created.
         */
        public static String getLogFileName() {
            return logLocation;
        }
    }

    private static ProductData productData = new ProductData();

    public static ProductData getProductData() {
        return productData;
    }

    public static void setCurrentPageTitle(ViewChangeEvent e) {
        Page.getCurrent().setTitle((e.getViewName().length() == 0 ? Views.DEFAULT.toString() : e.getViewName())
                + " - " + VaadinUI.getProductData().getProduct() + " v" + VaadinUI.getProductData().getVersion());

    }

    @Override
    protected void init(VaadinRequest request) {
        getPage().addUriFragmentChangedListener(new Page.UriFragmentChangedListener() {
            public void uriFragmentChanged(Page.UriFragmentChangedEvent source) {
                LogHelper.logInfo(source.getUriFragment());
                if (source.getUriFragment() == null)
                    return;
                if (source.getUriFragment().equals("admin")) {
                    navigator.navigateTo(Views.Admin.toString());
                }
                if (source.getUriFragment().equals("log")) {
                    navigator.navigateTo(Views.Log.toString());
                }
                if (source.getUriFragment().equals("results")) {
                    navigator.navigateTo(Views.Results.toString());
                }
            }
        });

    }

}