/**
 * 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 org.apache.lucene.gdata.servlet.handler;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.lucene.gdata.data.ServerBaseFeed;
import org.apache.lucene.gdata.server.GDataResponse;
import org.apache.lucene.gdata.server.ServiceException;
import org.apache.lucene.gdata.server.ServiceFactory;
import org.apache.lucene.gdata.server.administration.AdminService;
import org.apache.lucene.gdata.server.registry.ComponentType;
import org.apache.lucene.gdata.server.registry.GDataServerRegistry;

/**
 * @author Simon Willnauer
 *
 */
public class DeleteFeedHandler extends AbstractFeedHandler{
    private static final Log LOG = LogFactory.getLog(DeleteFeedHandler.class);

    /**
     * @throws IOException 
     * @see org.apache.lucene.gdata.servlet.handler.GDataRequestHandler#processRequest(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
     */
    @Override
    public void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
            super.processRequest(request,response);
            if(this.authenticated){
                AdminService service = null;
            try {
                ServerBaseFeed feed = createDeleteFeed(request);
                
                GDataServerRegistry registry = GDataServerRegistry.getRegistry();
                ServiceFactory serviceFactory = registry.lookup(ServiceFactory.class,ComponentType.SERVICEFACTORY);
                if(serviceFactory == null){
                    setError(GDataResponse.SERVER_ERROR,"required component is not available");
                    throw new FeedHandlerException("Can't save feed - ServiceFactory is null");
                }
                service = serviceFactory.getAdminService();
                service.deleteFeed(feed);
            } catch (FeedHandlerException e) {
                LOG.error("Can not delete feed -- "+e.getMessage(),e);
            }catch (ServiceException e) {
                LOG.error("Can not delete feed -- "+e.getMessage(),e);
                setError(e.getErrorCode(),"can not create feed");
            }finally{
                if(service != null)
                    service.close();
            }
            }
            sendResponse(response);
           
        
        
    }

    private ServerBaseFeed createDeleteFeed(final HttpServletRequest request) throws FeedHandlerException {
        String feedId = request.getParameter("feedid");
        if(feedId == null){
            setError(GDataResponse.BAD_REQUEST,"No feed id specified");
            throw new FeedHandlerException("no feed Id specified");
        }
        ServerBaseFeed retVal = new ServerBaseFeed();
        retVal.setId(feedId);
        return retVal;
    }

}