/*
    * 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.chemistry.opencmis.server.impl.atompub;
  
  import static org.apache.chemistry.opencmis.server.impl.atompub.AtomPubUtils.RESOURCE_ENTRY;
  import static org.apache.chemistry.opencmis.server.impl.atompub.AtomPubUtils.compileBaseUrl;
  import static org.apache.chemistry.opencmis.server.impl.atompub.AtomPubUtils.compileUrl;
  import static org.apache.chemistry.opencmis.server.impl.atompub.AtomPubUtils.writeObjectEntry;
  import static org.apache.chemistry.opencmis.server.shared.HttpUtils.getEnumParameter;
  import static org.apache.chemistry.opencmis.server.shared.HttpUtils.getStringParameter;
  
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  import org.apache.chemistry.opencmis.commons.data.ObjectData;
  import org.apache.chemistry.opencmis.commons.enums.VersioningState;
  import org.apache.chemistry.opencmis.commons.exceptions.CmisRuntimeException;
  import org.apache.chemistry.opencmis.commons.impl.Constants;
  import org.apache.chemistry.opencmis.commons.impl.UrlBuilder;
  import org.apache.chemistry.opencmis.commons.server.CallContext;
  import org.apache.chemistry.opencmis.commons.server.CmisService;
  import org.apache.chemistry.opencmis.commons.server.ObjectInfo;
  
  /**
   * MultiFiling Service operations.
   */
  public class MultiFilingService {
  
      private MultiFilingService() {
      }
  
      /**
       * Remove object from folder.
       */
      public static void removeObjectFromFolder(CallContext context, CmisService service, String repositoryId,
              HttpServletRequest request, HttpServletResponse response) throws Exception {
          // get parameters
          String removeFrom = getStringParameter(request, Constants.PARAM_REMOVE_FROM);
  
          AtomEntryParser parser = new AtomEntryParser(context.getTempDirectory(), context.getMemoryThreshold());
          parser.setIgnoreAtomContentSrc(true); // needed for some clients
          parser.parse(request.getInputStream());
  
          String objectId = parser.getId();
  
          if (objectId == null && removeFrom == null) {
              // create unfiled object
              createUnfiledObject(context, service, repositoryId, request, response, parser);
              return;
          }
  
          // execute
          service.removeObjectFromFolder(repositoryId, objectId, removeFrom, null);
  
          ObjectInfo objectInfo = service.getObjectInfo(repositoryId, objectId);
          if (objectInfo == null) {
              throw new CmisRuntimeException("Object Info is missing!");
          }
  
          ObjectData object = objectInfo.getObject();
          if (object == null) {
              throw new CmisRuntimeException("Object is null!");
          }
  
          if (object.getId() == null) {
              throw new CmisRuntimeException("Object Id is null!");
          }
  
          // set headers
          UrlBuilder baseUrl = compileBaseUrl(request, repositoryId);
  
          response.setStatus(HttpServletResponse.SC_CREATED);
          response.setContentType(Constants.MEDIATYPE_ENTRY);
          response.setHeader("Location", compileUrl(baseUrl, RESOURCE_ENTRY, object.getId()));
  
          // write XML
          AtomEntry entry = new AtomEntry();
          entry.startDocument(response.getOutputStream());
          writeObjectEntry(service, entry, object, null, repositoryId, null, null, baseUrl, true);
          entry.endDocument();
      }
  
      /**
      * Create unfiled object.
      * 
      * (Creation of unfiled objects via AtomPub is not defined in the CMIS 1.0
      * specification. This implementation follow the CMIS 1.1 draft.)
      */
     private static void createUnfiledObject(CallContext context, CmisService service, String repositoryId,
             HttpServletRequest request, HttpServletResponse response, AtomEntryParser parser) throws Exception {
         // get additional parameters
         VersioningState versioningState = getEnumParameter(request, Constants.PARAM_VERSIONIG_STATE,
                 VersioningState.class);
 
         // create
         String newObjectId = service.create(repositoryId, parser.getProperties(), null, parser.getContentStream(),
                 versioningState, parser.getPolicyIds(), null);
 
         ObjectInfo objectInfo = service.getObjectInfo(repositoryId, newObjectId);
         if (objectInfo == null) {
             throw new CmisRuntimeException("Object Info is missing!");
         }
 
         ObjectData object = objectInfo.getObject();
         if (object == null) {
             throw new CmisRuntimeException("Object is null!");
         }
 
         // set headers
         UrlBuilder baseUrl = compileBaseUrl(request, repositoryId);
 
         response.setStatus(HttpServletResponse.SC_CREATED);
         response.setContentType(Constants.MEDIATYPE_ENTRY);
         response.setHeader("Location", compileUrl(baseUrl, RESOURCE_ENTRY, newObjectId));
 
         // write XML
         AtomEntry entry = new AtomEntry();
         entry.startDocument(response.getOutputStream());
         writeObjectEntry(service, entry, object, null, repositoryId, null, null, baseUrl, true);
         entry.endDocument();
     }
 }