/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 de.unioninvestment.eai.portal.support.vaadin;

import javax.portlet.PortletRequest;

import com.liferay.portal.kernel.util.WebKeys;
import com.liferay.portal.theme.ThemeDisplay;
import com.vaadin.server.VaadinPortletService;
import com.vaadin.server.VaadinRequest;
import com.vaadin.ui.UI;

/**
 * Unterklasse von PortletApplication für Liferay, die Auskunft über die
 * Portlet-ID und die Community-ID gibt.
 * 
 * @author carsten.mjartan
 */
public abstract class LiferayUI extends UI {

	private static final long serialVersionUID = 1L;

	public static LiferayUI getCurrent() {
		return (LiferayUI) UI.getCurrent();
	}

	private String portletId;
	private long communityId = -1;

	@Override
	public final void init(VaadinRequest request) {
		readContextInformationFromCurrentRequest();
		doInit(request);
	}

	private void readContextInformationFromCurrentRequest() {
		PortletRequest currentRequest = VaadinPortletService
				.getCurrentPortletRequest();
		if (currentRequest != null) {
			portletId = (String) currentRequest
					.getAttribute(WebKeys.PORTLET_ID);

			ThemeDisplay themeDisplay = (ThemeDisplay) currentRequest
					.getAttribute(WebKeys.THEME_DISPLAY);
			communityId = themeDisplay.getScopeGroupId();
		}
	}

	/**
	 * @return the Liferay portlet id
	 */
	public String getPortletId() {
		return portletId;
	}

	/**
	 * @return die Liferay Community ID
	 */
	public long getCommunityId() {
		return communityId;
	}

	/**
	 * Von Unterklasse zu implementieren
	 */
	public abstract void doInit(VaadinRequest request);
}