Java tutorial
/* This file is part of Intake24. Copyright 2015, 2016 Newcastle University. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. This file is based on Intake24 v1.0. Crown copyright, 2012, 2013, 2014 Licensed under the Open Government Licence 3.0: http://www.nationalarchives.gov.uk/doc/open-government-licence/ */ package net.scran24.user.client; import java.util.Date; import java.util.logging.Logger; import org.workcraft.gwt.shared.client.Callback; import org.workcraft.gwt.shared.client.Callback1; import org.workcraft.gwt.shared.client.Option; import com.google.gwt.core.client.EntryPoint; import com.google.gwt.core.client.GWT; import com.google.gwt.dom.client.Document; import com.google.gwt.dom.client.Element; import com.google.gwt.i18n.client.LocaleInfo; import com.google.gwt.safehtml.shared.SafeHtmlUtils; import com.google.gwt.user.client.Window.Location; import com.google.gwt.user.client.rpc.AsyncCallback; import com.google.gwt.user.client.ui.Anchor; import com.google.gwt.user.client.ui.HTMLPanel; import com.google.gwt.user.client.ui.RootPanel; import net.scran24.common.client.CommonMessages; import net.scran24.common.client.CurrentUser; import net.scran24.common.client.LoginForm; import net.scran24.common.client.LoginServiceAsync; import net.scran24.common.client.NavigationBar; import net.scran24.common.client.survey.TutorialVideo; import net.scran24.datastore.shared.SurveySchemes; import net.scran24.datastore.shared.UserInfo; import net.scran24.user.client.survey.SurveyMessages; import net.scran24.user.client.survey.prompts.FoodLookupPrompt; import net.scran24.user.client.surveyscheme.SurveyScheme; import net.scran24.user.client.surveyscheme.SurveySchemeMap; /** * Entry point for respondent interface. */ public class Scran24 implements EntryPoint { final private Logger log = Logger.getLogger("Init"); private final SurveyMessages surveyMessages = SurveyMessages.Util.getInstance(); private final CommonMessages commonMessages = CommonMessages.Util.getInstance(); private LoginServiceAsync loginService = LoginServiceAsync.Util.getInstance(); private Element mainContent; private native void initComplete() /*-{ if (typeof $wnd.intake24_initComplete == 'function') $wnd.intake24_initComplete(); }-*/; public void initPage(final UserInfo userInfo) { final RootPanel links = RootPanel.get("navigation-bar"); Anchor watchTutorial = new Anchor(surveyMessages.navBar_tutorialVideo(), TutorialVideo.url, "_blank"); Anchor logOut = new Anchor(surveyMessages.navBar_logOut(), "../../common/logout" + Location.getQueryString()); // These divs are no longer used for content, but this code is left here // to handle legacy survey files Element se = Document.get().getElementById("suspended"); if (se != null) se.removeFromParent(); Element ae = Document.get().getElementById("active"); if (ae != null) ae.removeFromParent(); Element fe = Document.get().getElementById("finished"); if (fe != null) fe.removeFromParent(); Element ee = Document.get().getElementById("serverError"); if (ee != null) ee.removeFromParent(); Element fpe = Document.get().getElementById("finalPage"); if (fpe != null) fpe.removeFromParent(); mainContent = Document.get().getElementById("main-content"); mainContent.setInnerHTML(""); HTMLPanel mainContentPanel = HTMLPanel.wrap(mainContent); switch (userInfo.surveyParameters.state) { case NOT_INITIALISED: mainContentPanel .add(new HTMLPanel(SafeHtmlUtils.fromSafeConstant(surveyMessages.survey_notInitialised()))); links.add(new NavigationBar(watchTutorial, logOut)); break; case SUSPENDED: mainContentPanel.add(new HTMLPanel(SafeHtmlUtils.fromSafeConstant(surveyMessages .survey_suspended(SafeHtmlUtils.htmlEscape(userInfo.surveyParameters.suspensionReason))))); links.add(new NavigationBar(watchTutorial, logOut)); break; case ACTIVE: Date now = new Date(); if (now.getTime() > userInfo.surveyParameters.endDate) { mainContentPanel .add(new HTMLPanel(SafeHtmlUtils.fromSafeConstant(surveyMessages.survey_finished()))); } else { SurveyInterfaceManager surveyInterfaceManager = new SurveyInterfaceManager(mainContentPanel); SurveyScheme scheme = SurveySchemeMap.initScheme( SurveySchemes.schemeForId(userInfo.surveyParameters.schemeName), LocaleInfo.getCurrentLocale().getLocaleName(), surveyInterfaceManager); links.add(new NavigationBar(scheme.navBarLinks(), watchTutorial, logOut)); scheme.showNextPage(); } break; } RootPanel.get("loading").getElement().removeFromParent(); initComplete(); } public void onModuleLoad() { GWT.setUncaughtExceptionHandler(new Intake24UncaughtExceptionHandler()); // These divs are no longer used for content, but this code is left here // to handle legacy survey files final Element serverError = Document.get().getElementById("serverError"); if (serverError != null) serverError.removeFromParent(); log.info("Fetching user information"); // This page should not be accessed unless the user is authenticated // as a respondent (see net.scran24.common.server.auth.ScranAuthFilter) loginService.getUserInfo(new AsyncCallback<Option<UserInfo>>() { @Override public void onSuccess(Option<UserInfo> result) { result.accept(new Option.SideEffectVisitor<UserInfo>() { @Override public void visitSome(final UserInfo userInfo) { CurrentUser.setUserInfo(userInfo); // Singleton portion size method for weight type-in // Inserted dynamically by client runtime but depends on // server-side configuration parameters (base image url) // so still has to be loaded once FoodLookupPrompt.preloadWeightPortionSizeMethod(new Callback() { @Override public void call() { initPage(userInfo); } }, new Callback() { @Override public void call() { HTMLPanel mainContentPanel = HTMLPanel.wrap(mainContent); mainContentPanel .add(new HTMLPanel(SafeHtmlUtils.fromString(commonMessages.serverError()))); } }); } @Override public void visitNone() { // this should never happen as any unauthenticated user // should be // redirected to the log in page, but still may happen // in some weird // case where the authentication token is lost between // the // authentication and opening this page LoginForm.showPopup(new Callback1<UserInfo>() { @Override public void call(final UserInfo userInfo) { initPage(userInfo); } }); } }); } @Override public void onFailure(Throwable caught) { HTMLPanel mainContentPanel = HTMLPanel.wrap(mainContent); mainContentPanel.add(new HTMLPanel(SafeHtmlUtils.fromString(commonMessages.serverError()))); } }); } }