/*
    * Copyright 2008 FatWire Corporation. All Rights Reserved.
    *
    * Licensed 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 tools.gsf.facade.assetapi;
  
  import COM.FutureTense.Interfaces.ICS;
  import COM.FutureTense.Util.ftErrors;
  import com.fatwire.assetapi.common.AssetAccessException;
  import com.fatwire.assetapi.data.AssetData;
  import com.fatwire.assetapi.data.AssetDataManager;
  import com.fatwire.assetapi.data.AssetId;
  import com.fatwire.system.Session;
  import com.fatwire.system.SessionFactory;
  import tools.gsf.runtime.CSRuntimeException;
  
  import java.util.Arrays;
  import java.util.Collections;
  
  /**
   * Convenient shortcuts for working with AssetData objects
   *
   * @author Tony Field
   * @author Dolf Dijkstra
   * @since Nov 17, 2009
   */
  public final class AssetDataUtils {
      private AssetDataUtils() {
      }
  
      /**
       * Read all attributes for the given asset id.
       *
       * @param ics ICS context
       * @param id  must be valid or else an exception is thrown
       * @return asset data, never null.
       */
      public static AssetData getAssetData(ICS ics, AssetId id) {
          AssetDataManager mgr = (AssetDataManager) getSession(ics).getManager(AssetDataManager.class.getName());
          try {
              for (AssetData data : mgr.read(Collections.singletonList(id))) {
                  return data; // first one wins
              }
          } catch (AssetAccessException e) {
              throw new CSRuntimeException("Failed to read attribute data: " + e, ftErrors.exceptionerr, e);
          }
          throw new CSRuntimeException("Asset not found: " + id, ftErrors.badparams);
      }
  
      /**
       * Return the AssetData for the specified asset
       *
       * @param ics        content server context
       * @param id         asset id
       * @param attributes list of attribute names
       * @return asset data
       */
      public static AssetData getAssetData(ICS ics, AssetId id, String... attributes) {
          AssetDataManager mgr = (AssetDataManager) getSession(ics).getManager(AssetDataManager.class.getName());
          try {
              return mgr.readAttributes(id, Arrays.asList(attributes));
          } catch (AssetAccessException e) {
              throw new CSRuntimeException("Failed to read attribute data: " + e, ftErrors.exceptionerr, e);
          }
      }
  
      /**
       * This is a convenience method to read AssetData for the current c/cid
       * asset on the ics scope.
       *
       * @param ics        Content Server context object
       * @param attributes list of attribute names
       * @return asset data
       */
      public static AssetData getCurrentAssetData(ICS ics, String... attributes) {
          AssetDataManager mgr = (AssetDataManager) getSession(ics).getManager(AssetDataManager.class.getName());
          try {
              AssetId id = AssetIdUtils.currentId(ics);
              return mgr.readAttributes(id, Arrays.asList(attributes));
          } catch (AssetAccessException e) {
              throw new CSRuntimeException("Failed to read attribute data: " + e, ftErrors.exceptionerr, e);
          }
  
      }
  
      /**
       * This is a convenience method to read AssetData for the current c/cid
      * asset on the ics scope.
      *
      * @param ics Content Server context object
      * @return asset data
      */
     public static AssetData getCurrentAssetData(ICS ics) {
         AssetDataManager mgr = (AssetDataManager) getSession(ics).getManager(AssetDataManager.class.getName());
         AssetId id = AssetIdUtils.currentId(ics);
         try {
             for (AssetData data : mgr.read(Collections.singletonList(id))) {
                 return data; // first one wins
             }
         } catch (AssetAccessException e) {
             throw new CSRuntimeException("Failed to read attribute data: " + e, ftErrors.exceptionerr, e);
         }
         throw new CSRuntimeException("Asset not found: " + id, ftErrors.badparams);
 
     }
 
     private static Session getSession(ICS ics) {
         return SessionFactory.getSession(ics);
     }
 
 }