/**
    * This file Copyright (c) 2017-2018 Magnolia International
    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
    *
    *
    * This file is dual-licensed under both the Magnolia
    * Network Agreement and the GNU General Public License.
    * You may elect to use one or the other of these licenses.
    *
   * This file is distributed in the hope that it will be
   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
   * implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
   * Redistribution, except as permitted by whichever of the GPL
   * or MNA you select, is prohibited.
   *
   * 1. For the GPL license (GPL), you can redistribute and/or
   * modify this file under the terms of the GNU General
   * Public License, Version 3, as published by the Free Software
   * Foundation.  You should have received a copy of the GNU
   * General Public License, Version 3 along with this program;
   * if not, write to the Free Software Foundation, Inc., 51
   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * 2. For the Magnolia Network Agreement (MNA), this file
   * and the accompanying materials are made available under the
   * terms of the MNA which accompanies this distribution, and
   * is available at http://www.magnolia-cms.com/mna.html
   *
   * Any modifications to this file must keep this entire header
   * intact.
   *
   */
  package info.magnolia.importexport.exporter;
  
  import static javax.jcr.PropertyType.nameFromValue;
  import static org.apache.commons.lang3.StringUtils.lowerCase;
  import static org.apache.jackrabbit.value.ValueHelper.serialize;
  
  import info.magnolia.jcr.util.NodeTypes;
  
  import javax.jcr.Node;
  import javax.jcr.PropertyType;
  import javax.jcr.RepositoryException;
  import javax.jcr.Session;
  import javax.jcr.Value;
  
  import org.apache.jackrabbit.JcrConstants;
  import org.apache.jackrabbit.commons.xml.DocumentViewExporter;
  import org.xml.sax.ContentHandler;
  import org.xml.sax.SAXException;
  
  /**
   * {@link org.apache.jackrabbit.commons.xml.Exporter} for YAML format.
   */
  public class YamlExporter extends DocumentViewExporter {
  
      public YamlExporter(Session session, ContentHandler handler, boolean recurse, boolean binary) {
          super(session, handler, recurse, binary);
      }
  
      @Override
      protected void exportNode(String uri, String local, Node node) throws RepositoryException, SAXException {
          if (node.getDepth() == 0) { //don't include root node
              super.exportNodes(node);
          } else {
              super.exportNode(uri, local, node);
          }
      }
  
      @Override
      protected void exportProperty(String uri, String local, Value value) throws RepositoryException {
          //mgnl:contentNode is the default nodeType, no need to export it, this saves a lot of lines e.g. in the configuration workspace export
          if (JcrConstants.JCR_PRIMARYTYPE.equals(getXMLName(uri, local)) && NodeTypes.ContentNode.NAME.equals(value.getString())) {
              return;
          }
          String typeTag = getPropertyTypeTag(value);
          String attValue = serialize(value, false);
          super.addAttribute(uri, local, typeTag + attValue);
      }
  
      @Override
      protected void exportProperty(String uri, String local, int type, Value[] values) {
          try {
              if (values.length == 0) {
                  super.addAttribute(uri, local, "[]!");
              } else {
                  String typeTag = getPropertyTypeTag(values[0]);
                  for (int i = 0; i < values.length; i++) {
                      super.addAttribute(uri, local, "[" + i + "]" + typeTag + serialize(values[i], false));
                  }
              }
          } catch (RepositoryException e) {
              throw new RuntimeException(e);
          }
      }
  
      private String getPropertyTypeTag(Value value) {
          switch (value.getType()) {
             case PropertyType.BINARY:
                 throw new UnsupportedOperationException("command.error.binary.export.not.supported");
             case PropertyType.PATH:
             case PropertyType.REFERENCE:
             case PropertyType.WEAKREFERENCE:
             case PropertyType.URI:
                 return lowerCase(nameFromValue(value.getType())) + "!";
             default:
                 return "!";
             }
     }
 
 }
 ;