001/*
002 * (C) Copyright 2006-2013 Nuxeo SAS (http://nuxeo.com/) and contributors.
003 *
004 * All rights reserved. This program and the accompanying materials
005 * are made available under the terms of the GNU Lesser General Public License
006 * (LGPL) version 2.1 which accompanies this distribution, and is available at
007 * http://www.gnu.org/licenses/lgpl.html
008 *
009 * This library is distributed in the hope that it will be useful,
010 * but WITHOUT ANY WARRANTY; without even the implied warranty of
011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012 * Lesser General Public License for more details.
013 *
014 * Contributors:
015 *     Nuxeo - initial API and implementation
016 */
017
018package org.nuxeo.ecm.platform.ui.web.auth;
019
020import org.nuxeo.ecm.core.api.NuxeoException;
021import org.nuxeo.ecm.platform.ui.web.auth.service.LoginProviderLinkComputer;
022import org.nuxeo.ecm.platform.ui.web.auth.service.LoginScreenConfig;
023import org.nuxeo.ecm.platform.ui.web.auth.service.PluggableAuthenticationService;
024import org.nuxeo.runtime.api.Framework;
025
026/**
027 * Simple helper class for easy access form the login.jsp page
028 *
029 * @author <a href="mailto:tdelprat@nuxeo.com">Tiry</a>
030 * @since 5.7
031 */
032public class LoginScreenHelper {
033
034    public static LoginScreenConfig getConfig() {
035        PluggableAuthenticationService authService = (PluggableAuthenticationService) Framework.getRuntime().getComponent(
036                PluggableAuthenticationService.NAME);
037        return authService.getLoginScreenConfig();
038    }
039
040    public static void registerLoginProvider(String name, String iconUrl, String link, String label,
041            String description, LoginProviderLinkComputer computer) {
042
043        LoginScreenConfig config = getConfig();
044        if (config != null) {
045            config.registerLoginProvider(name, iconUrl, link, label, description, computer);
046        } else {
047            throw new NuxeoException("There is no available LoginScreen config");
048        }
049    }
050
051    public static String getValueWithDefault(String value, String defaultValue) {
052        if (value == null || value.isEmpty()) {
053            return defaultValue;
054        }
055        return value;
056    }
057
058}