/**
* Copyright (C) 2010-2014 Morgner UG (haftungsbeschränkt)
*
* This file is part of Structr <http://structr.org>.
*
* Structr is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* Structr 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 General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with Structr. If not, see <http://www.gnu.org/licenses/>.
*/
package org.structr.websocket.command;
import name.fraser.neil.plaintext.diff_match_patch;
import name.fraser.neil.plaintext.diff_match_patch.Patch;
import org.structr.core.entity.AbstractNode;
import org.structr.web.entity.dom.Content;
import org.structr.websocket.message.MessageBuilder;
import org.structr.websocket.message.WebSocketMessage;
//~--- JDK imports ------------------------------------------------------------
import java.util.LinkedList;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.structr.websocket.StructrWebSocket;
//~--- classes ----------------------------------------------------------------
/**
*
* @author Axel Morgner
*/
public class PatchCommand extends AbstractCommand {
private static final Logger logger = Logger.getLogger(PatchCommand.class.getName());
static {
StructrWebSocket.addCommand(PatchCommand.class);
}
//~--- methods --------------------------------------------------------
@Override
public void processMessage(WebSocketMessage webSocketData) {
final AbstractNode node = getNode(webSocketData.getId());
Map<String, Object> properties = webSocketData.getNodeData();
String patch = (String) properties.get("patch");
if (node != null) {
diff_match_patch dmp = new diff_match_patch();
String oldText = node.getProperty(Content.content);
LinkedList<Patch> patches = (LinkedList<Patch>) dmp.patch_fromText(patch);
final Object[] results = dmp.patch_apply(patches, oldText);
try {
node.setProperty(Content.content, results[0].toString());
} catch (Throwable t) {
logger.log(Level.WARNING, "Could not apply patch {0}", patch);
getWebSocket().send(MessageBuilder.status().code(400).message("Could not apply patch. " + t.getMessage()).build(), true);
}
} else {
logger.log(Level.WARNING, "Node with uuid {0} not found.", webSocketData.getId());
getWebSocket().send(MessageBuilder.status().code(404).message("Node with uuid " + webSocketData.getId() + " not found.").build(), true);
}
}
//~--- get methods ----------------------------------------------------
@Override
public String getCommand() {
return "PATCH";
}
}