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Liferay Wiki Engine JSPWiki
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/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 */

package com.liferay.wiki.engine.jspwiki;

import com.ecyrd.jspwiki.QueryItem;
import com.ecyrd.jspwiki.WikiEngine;
import com.ecyrd.jspwiki.WikiPage;
import com.ecyrd.jspwiki.attachment.Attachment;
import com.ecyrd.jspwiki.providers.ProviderException;
import com.ecyrd.jspwiki.providers.WikiAttachmentProvider;

import com.liferay.portal.kernel.io.unsync.UnsyncByteArrayInputStream;
import com.liferay.portal.kernel.repository.model.FileEntry;
import com.liferay.portal.kernel.util.GetterUtil;
import com.liferay.wiki.service.WikiPageLocalServiceUtil;

import java.io.InputStream;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Date;
import java.util.List;
import java.util.Properties;

/**
 * @author Jorge Ferrer
 */
public class LiferayAttachmentProvider implements WikiAttachmentProvider {

	@Override
	public void deleteAttachment(Attachment attachment) {
	}

	@Override
	public void deleteVersion(Attachment attachment) {
	}

	@Override
	public Collection findAttachments(QueryItem[] query) {
		return Collections.emptyList();
	}

	@Override
	public InputStream getAttachmentData(Attachment attachment) {
		return _EMPTY_STREAM;
	}

	@Override
	public Attachment getAttachmentInfo(WikiPage page, String name, int version)
		throws ProviderException {

		com.liferay.wiki.model.WikiPage wikiPage = null;

		try {
			wikiPage = WikiPageLocalServiceUtil.getPage(
				_nodeId, page.getName());

			for (FileEntry fileEntry : wikiPage.getAttachmentsFileEntries()) {
				String title = fileEntry.getTitle();

				if (title.equals(name)) {
					return new Attachment(_engine, page.getName(), name);
				}
			}

			return null;
		}
		catch (Exception e) {
			throw new ProviderException(e.toString());
		}
	}

	@Override
	public String getProviderInfo() {
		return LiferayAttachmentProvider.class.getName();
	}

	@Override
	public List getVersionHistory(Attachment attachment) {
		List history = new ArrayList<>();

		history.add(attachment);

		return history;
	}

	@Override
	public void initialize(WikiEngine engine, Properties props) {
		_engine = engine;
		_nodeId = GetterUtil.getLong(props.getProperty("nodeId"));
	}

	@Override
	public List listAllChanged(Date timestamp) {
		return Collections.emptyList();
	}

	@Override
	public Collection listAttachments(WikiPage page) {
		return Collections.emptyList();
	}

	@Override
	public void moveAttachmentsForPage(String oldParent, String newParent) {
	}

	@Override
	public void putAttachmentData(Attachment attachment, InputStream data) {
	}

	private static final InputStream _EMPTY_STREAM =
		new UnsyncByteArrayInputStream(new byte[0]);

	private WikiEngine _engine;
	private long _nodeId;

}