org.adho.dhconvalidator.ui.UserSwitchPanel.java Source code

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Here is the source code for org.adho.dhconvalidator.ui.UserSwitchPanel.java

Source

/*
 * Copyright (c) 2015 http://www.adho.org/
 * License: see LICENSE file
 */
package org.adho.dhconvalidator.ui;

import com.vaadin.data.Property.ValueChangeEvent;
import com.vaadin.data.Property.ValueChangeListener;
import com.vaadin.server.VaadinSession;
import com.vaadin.ui.Button;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.Button.ClickListener;
import com.vaadin.ui.ComboBox;
import com.vaadin.ui.HorizontalLayout;
import com.vaadin.ui.Notification;
import com.vaadin.ui.Notification.Type;
import com.vaadin.ui.themes.BaseTheme;
import java.util.List;
import org.adho.dhconvalidator.Messages;
import org.adho.dhconvalidator.user.User;
import org.adho.dhconvalidator.user.UserList;

/**
 * A panel that provides the UI for switching to another user.
 *
 * @author marco.petris@web.de
 */
public class UserSwitchPanel extends HorizontalLayout {

    private ComboBox userSwitchBox;
    private Button btReload;

    public UserSwitchPanel() {
        initComponents();
        initActions();
    }

    /** Setup behaviour. */
    private void initActions() {
        btReload.addClickListener(new ClickListener() {

            @Override
            public void buttonClick(ClickEvent event) {
                // reload the user list and refill box
                UserList.INSTANCE.reload();
                User selected = (User) userSwitchBox.getValue();
                userSwitchBox.removeAllItems();
                List<User> users = UserList.INSTANCE.getUsers();
                setUsers(users);
                if (selected != null && users.contains(selected)) {
                    userSwitchBox.setValue(selected);
                }
            }
        });

        userSwitchBox.addValueChangeListener(new ValueChangeListener() {

            @Override
            public void valueChange(ValueChangeEvent event) {

                // switch to selected user

                User oldUser = (User) VaadinSession.getCurrent().getAttribute(SessionStorageKey.USER.name());
                if (oldUser.isAdmin()) {
                    User selectedUser = (User) event.getProperty().getValue();
                    if ((selectedUser != null) && (!oldUser.equals(selectedUser))) {
                        VaadinSession.getCurrent().setAttribute(SessionStorageKey.USER.name(),
                                new User(selectedUser.getUserId(), selectedUser.getFirstName(),
                                        selectedUser.getLastName(), selectedUser.getEmail(), true));
                        Notification.show(Messages.getString("UserSwitchPanel.notificationTitle"),
                                Messages.getString("UserSwitchPanel.notificationContent",
                                        selectedUser.getLastName(), selectedUser.getFirstName(),
                                        selectedUser.getEmail()),
                                Type.HUMANIZED_MESSAGE);
                    }
                } else {
                    throw new IllegalStateException(Messages.getString("UserSwitchPanel.illegalState"));
                }
            }
        });
    }

    /**
     * Fill box with given users.
     *
     * @param users
     */
    private void setUsers(List<User> users) {
        userSwitchBox.addItems(users);
        for (User user : users) {
            userSwitchBox.setItemCaption(user, user.getLastName() + ", " + user.getFirstName() + ", "
                    + user.getEmail() + " (#" + user.getUserId() + ")");
        }
    }

    /** Setup UI. */
    private void initComponents() {
        List<User> users = UserList.INSTANCE.getUsers();
        userSwitchBox = new ComboBox(Messages.getString("UserSwitchPanel.boxCaption"));
        setUsers(users);
        User current = (User) VaadinSession.getCurrent().getAttribute(SessionStorageKey.USER.name());
        userSwitchBox.setValue(current);

        userSwitchBox.setDescription(Messages.getString("UserSwitchPanel.boxDescription"));
        userSwitchBox.setNewItemsAllowed(false);
        userSwitchBox.setNullSelectionAllowed(false);

        addComponent(userSwitchBox);
        btReload = new Button(Messages.getString("UserSwitchPanel.reloadCaption"));
        btReload.setStyleName(BaseTheme.BUTTON_LINK);
        btReload.addStyleName("plain-link");

        addComponent(btReload);
    }
}