ShowcaseEntryPoint.java

/*
 * Copyright 2017 Red Hat, Inc. and/or its affiliates.
 *
 * 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.
 */
package org.kie.workbench.common.stunner.standalone.client;

import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.inject.Inject;

import com.google.gwt.animation.client.Animation;
import com.google.gwt.core.client.GWT;
import com.google.gwt.dom.client.Element;
import com.google.gwt.dom.client.Style;
import com.google.gwt.logging.client.LogConfiguration;
import com.google.gwt.user.client.ui.RootPanel;
import org.jboss.errai.common.client.api.Caller;
import org.jboss.errai.common.client.api.RemoteCallback;
import org.jboss.errai.ioc.client.api.AfterInitialization;
import org.jboss.errai.ioc.client.api.EntryPoint;
import org.jboss.errai.security.shared.api.Role;
import org.jboss.errai.security.shared.api.identity.User;
import org.jboss.errai.security.shared.service.AuthenticationService;
import org.kie.workbench.common.stunner.client.widgets.menu.dev.MenuDevCommandsBuilder;
import org.kie.workbench.common.stunner.standalone.client.perspectives.AuthoringPerspective;
import org.kie.workbench.common.stunner.standalone.client.perspectives.CanvasPerspective;
import org.kie.workbench.common.stunner.standalone.client.perspectives.HomePerspective;
import org.uberfire.client.mvp.ActivityManager;
import org.uberfire.client.mvp.PlaceManager;
import org.uberfire.client.views.pfly.menu.UserMenu;
import org.uberfire.client.workbench.widgets.common.ErrorPopupPresenter;
import org.uberfire.client.workbench.widgets.menu.UtilityMenuBar;
import org.uberfire.client.workbench.widgets.menu.WorkbenchMenuBarPresenter;
import org.uberfire.ext.security.management.client.ClientUserSystemManager;
import org.uberfire.mvp.Command;
import org.uberfire.workbench.model.menu.MenuFactory;
import org.uberfire.workbench.model.menu.Menus;

import static org.uberfire.workbench.model.menu.MenuFactory.newTopLevelMenu;

/**
 * GWT's entry-point for Stunner showcase.
 */
@EntryPoint
public class ShowcaseEntryPoint {

    private static Logger LOGGER = Logger.getLogger(ShowcaseEntryPoint.class.getName());

    @Inject
    private PlaceManager placeManager;

    @Inject
    private WorkbenchMenuBarPresenter menubar;

    @Inject
    private UserMenu userMenu;

    @Inject
    private UtilityMenuBar utilityMenuBar;

    @Inject
    public User identity;

    @Inject
    private ActivityManager activityManager;

    @Inject
    private Caller<AuthenticationService> authService;

    @Inject
    private ClientUserSystemManager userSystemManager;

    @Inject
    private ErrorPopupPresenter errorPopupPresenter;

    @Inject
    private MenuDevCommandsBuilder menuDevCommandsBuilder;

    @AfterInitialization
    public void startApp() {
        userSystemManager.waitForInitialization(new Command() {
            @Override
            public void execute() {
                setupGlobalErrorHandler();
                setupMenus();
                hideLoadingPopup();
                menuDevCommandsBuilder.enable();
            }
        });
    }

    private void setupGlobalErrorHandler() {
        GWT.setUncaughtExceptionHandler(throwable -> {
            final String message = "Uncaught error on client side: " + throwable.getMessage();
            errorPopupPresenter.showMessage(message);
            log(Level.SEVERE,
                throwable.getMessage());
        });
    }

    private void setupMenus() {
        for (Menus roleMenus : getRoles()) {
            userMenu.addMenus(roleMenus);
        }
        refreshMenus();
    }

    private void refreshMenus() {
        menubar.clear();
        menubar.addMenus(createMenuBar());
        final Menus utilityMenus =
                MenuFactory.newTopLevelCustomMenu(userMenu)
                        .endMenu()
                        .build();
        utilityMenuBar.addMenus(utilityMenus);
    }

    private Menus createMenuBar() {
        return newTopLevelMenu("Home")
                .perspective(HomePerspective.PERSPECTIVE_ID)
                .endMenu()
                .newTopLevelMenu("Authoring")
                .perspective(AuthoringPerspective.PERSPECTIVE_ID)
                .endMenu()
                .newTopLevelMenu("Canvas only")
                .perspective(CanvasPerspective.PERSPECTIVE_ID)
                .endMenu()
                .build();
    }

    private List<Menus> getRoles() {
        final List<Menus> result = new ArrayList<Menus>(identity.getRoles().size());
        result.add(MenuFactory.newSimpleItem("Logout").respondsWith(new LogoutCommand()).endMenu().build());
        for (Role role : identity.getRoles()) {
            if (!role.getName().equals("IS_REMEMBER_ME")) {
                result.add(MenuFactory.newSimpleItem("Role: " + role.getName()).endMenu().build());
            }
        }
        return result;
    }

    // Fade out the "Loading application" pop-up
    private void hideLoadingPopup() {
        final Element e = RootPanel.get("loading").getElement();
        new Animation() {

            @Override
            protected void onUpdate(double progress) {
                e.getStyle().setOpacity(1.0 - progress);
            }

            @Override
            protected void onComplete() {
                e.getStyle().setVisibility(Style.Visibility.HIDDEN);
            }
        }.run(500);
    }

    private class LogoutCommand implements Command {

        @Override
        public void execute() {
            authService.call(new RemoteCallback<Void>() {
                @Override
                public void callback(Void response) {
                    final String location = GWT.getModuleBaseURL().replaceFirst("/" + GWT.getModuleName() + "/",
                                                                                "/logout.jsp");
                    redirect(location);
                }
            }).logout();
        }
    }

    public static native void redirect(String url)/*-{
        $wnd.location = url;
    }-*/;

    private void log(final Level level,
                     final String message) {
        if (LogConfiguration.loggingIsEnabled()) {
            LOGGER.log(level,
                       message);
        }
    }
}