/*
    * 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.browser;
  
  import org.apache.chemistry.opencmis.commons.data.ObjectList;
  import org.apache.chemistry.opencmis.commons.enums.IncludeRelationships;
  import org.apache.chemistry.opencmis.commons.exceptions.CmisRuntimeException;
  import org.apache.chemistry.opencmis.commons.impl.Constants;
  import static org.apache.chemistry.opencmis.commons.impl.Constants.PARAM_ACL;
  import static org.apache.chemistry.opencmis.commons.impl.Constants.PARAM_CHANGE_LOG_TOKEN;
  import static org.apache.chemistry.opencmis.commons.impl.Constants.PARAM_FILTER;
  import static org.apache.chemistry.opencmis.commons.impl.Constants.PARAM_POLICY_IDS;
  import static org.apache.chemistry.opencmis.commons.impl.Constants.PARAM_PROPERTIES;
  import org.apache.chemistry.opencmis.commons.impl.JSONConstants;
  import org.apache.chemistry.opencmis.commons.impl.JSONConverter;
  import org.apache.chemistry.opencmis.commons.impl.TypeCache;
  import org.apache.chemistry.opencmis.commons.impl.json.JSONObject;
  import org.apache.chemistry.opencmis.commons.impl.server.TypeCacheImpl;
  import org.apache.chemistry.opencmis.commons.server.CallContext;
  import org.apache.chemistry.opencmis.commons.server.CmisService;
  import org.apache.chemistry.opencmis.commons.spi.Holder;
  import static org.apache.chemistry.opencmis.server.shared.HttpUtils.getBigIntegerParameter;
  import static org.apache.chemistry.opencmis.server.shared.HttpUtils.getBooleanParameter;
  import static org.apache.chemistry.opencmis.server.shared.HttpUtils.getEnumParameter;
  import static org.apache.chemistry.opencmis.server.shared.HttpUtils.getStringParameter;
  
  import java.math.BigInteger;
  
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  
  /**
   * Discovery Service operations.
   */
  public class DiscoveryService
  {
      private DiscoveryService(  )
      {
      }
  
      /**
       * query.
       */
      public static void query( CallContext context, CmisService service, String repositoryId,
          HttpServletRequest request, HttpServletResponse response )
          throws Exception
      {
          // get parameters
          String statement = getStringParameter( request, Constants.PARAM_Q );
          Boolean searchAllVersions = getBooleanParameter( request, Constants.PARAM_SEARCH_ALL_VERSIONS );
          Boolean includeAllowableActions = getBooleanParameter( request, Constants.PARAM_ALLOWABLE_ACTIONS );
          IncludeRelationships includeRelationships = getEnumParameter( request, Constants.PARAM_RELATIONSHIPS,
                  IncludeRelationships.class );
          String renditionFilter = getStringParameter( request, Constants.PARAM_RENDITION_FILTER );
          BigInteger maxItems = getBigIntegerParameter( request, Constants.PARAM_MAX_ITEMS );
          BigInteger skipCount = getBigIntegerParameter( request, Constants.PARAM_SKIP_COUNT );
  
          // execute
          ObjectList results = service.query( repositoryId, statement, searchAllVersions, includeAllowableActions,
                  includeRelationships, renditionFilter, maxItems, skipCount, null );
  
          if ( results == null )
          {
              throw new CmisRuntimeException( "Results are null!" );
          }
  
          TypeCache typeCache = new TypeCacheImpl( repositoryId, service );
          JSONObject jsonResults = JSONConverter.convert( results, typeCache, true );
  
          response.setStatus( HttpServletResponse.SC_OK );
          BrowserBindingUtils.writeJSON( jsonResults, request, response );
      }
  
      /**
       * getContentChanges.
       */
      public static void getContentChanges( CallContext context, CmisService service, String repositoryId,
          HttpServletRequest request, HttpServletResponse response )
          throws Exception
      {
          // get parameters
          String changeLogToken = getStringParameter( request, PARAM_CHANGE_LOG_TOKEN );
         Boolean includeProperties = getBooleanParameter( request, PARAM_PROPERTIES );
         String filter = getStringParameter( request, PARAM_FILTER );
         Boolean includePolicyIds = getBooleanParameter( request, PARAM_POLICY_IDS );
         Boolean includeAcl = getBooleanParameter( request, PARAM_ACL );
         BigInteger maxItems = getBigIntegerParameter( request, Constants.PARAM_MAX_ITEMS );
 
         Holder<String> changeLogTokenHolder = new Holder<String>( changeLogToken );
         ObjectList changes = service.getContentChanges( repositoryId, changeLogTokenHolder, includeProperties, filter,
                 includePolicyIds, includeAcl, maxItems, null );
 
         TypeCache typeCache = new TypeCacheImpl( repositoryId, service );
         JSONObject jsonChanges = JSONConverter.convert( changes, typeCache, false );
         jsonChanges.put( JSONConstants.JSON_OBJECTLIST_CHANGE_LOG_TOKEN, changeLogTokenHolder.getValue(  ) );
 
         response.setStatus( HttpServletResponse.SC_OK );
         BrowserBindingUtils.writeJSON( jsonChanges, request, response );
     }
 }