/*
    * 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.commons.vfs2.provider.webdav4;
  
  import java.util.Objects;
  
  import org.apache.commons.vfs2.FileContent;
  import org.apache.commons.vfs2.FileContentInfo;
  import org.apache.commons.vfs2.FileContentInfoFactory;
  import org.apache.commons.vfs2.FileSystemException;
  import org.apache.commons.vfs2.impl.DefaultFileContentInfo;
  import org.apache.commons.vfs2.provider.GenericURLFileName;
  import org.apache.commons.vfs2.util.FileObjectUtils;
  import org.apache.jackrabbit.webdav.property.DavProperty;
  import org.apache.jackrabbit.webdav.property.DavPropertyName;
  import org.apache.jackrabbit.webdav.property.DavPropertyNameSet;
  import org.apache.jackrabbit.webdav.property.DavPropertySet;
  
  /**
   * Determines the content information for files accessed via WebDAV.
   *
   * @since 2.5.0
   */
  public class Webdav4FileContentInfoFactory implements FileContentInfoFactory {
  
      /**
       * Constructs a new instance.
       */
      public Webdav4FileContentInfoFactory() {
          // empty
      }
  
      @Override
      public FileContentInfo create(final FileContent fileContent) throws FileSystemException {
          final Webdav4FileObject file = (Webdav4FileObject) FileObjectUtils.getAbstractFileObject(fileContent.getFile());
  
          String contentType = null;
          String contentEncoding = null;
  
          final DavPropertyNameSet nameSet = new DavPropertyNameSet();
          nameSet.add(DavPropertyName.GETCONTENTTYPE);
          final DavPropertySet propertySet = file.getProperties((GenericURLFileName) file.getName(), nameSet, true);
  
          DavProperty<?> property = propertySet.get(DavPropertyName.GETCONTENTTYPE);
          if (property != null) {
              contentType = Objects.toString(property.getValue(), null);
          }
          property = propertySet.get(Webdav4FileObject.RESPONSE_CHARSET);
          if (property != null) {
              contentEncoding = Objects.toString(property.getValue(), null);
          }
  
          return new DefaultFileContentInfo(contentType, contentEncoding);
      }
  }