/**
    * This file Copyright (c) 2010-2018 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.module.cache.commands;
  
  import info.magnolia.commands.MgnlCommand;
  import info.magnolia.context.Context;
  import info.magnolia.module.cache.Cache;
  import info.magnolia.module.cache.CacheFactory;
  import info.magnolia.module.cache.CacheModule;
  import info.magnolia.module.cache.CachePolicy;
  import info.magnolia.module.cache.ContentCachingConfiguration;
  import info.magnolia.module.cache.cachepolicy.Never;
  
  import java.util.Arrays;
  import java.util.Collection;
  import java.util.HashSet;
  import java.util.Set;
  
  import javax.inject.Inject;
  
  import org.apache.commons.lang3.StringUtils;
  
  /**
   * Command to completely flush all entries related to given uuid from all available caches.
   */
  public class FlushFromCachesByUUIDCommand extends MgnlCommand {
  
      public static final String WORKSPACE = "repository";
      public static final String UUID = "uuid";
  
      private final CacheModule cacheModule;
      private String uuid;
      private String workspace;
  
      @Inject
      public FlushFromCachesByUUIDCommand(CacheModule cacheModule) {
          this.cacheModule = cacheModule;
      }
  
      @Override
      public boolean execute(Context ctx) throws Exception {
          String uuid = (String) ctx.get(UUID);
          if (StringUtils.isBlank(uuid)) {
              uuid = getUuid();
          }
          String workspace = (String) ctx.get(WORKSPACE);
          if (StringUtils.isBlank(workspace)) {
              workspace = getWorkspace();
          }
          final Set<Object> keySet = new HashSet<Object>();
          Collection<ContentCachingConfiguration> cacheConfigs = cacheModule.getContentCaching().values();
          for (ContentCachingConfiguration config : cacheConfigs) {
              if (!(config.getCachePolicy() instanceof Never)) {
                  CachePolicy policy = config.getCachePolicy();
                  keySet.addAll(Arrays.asList(policy.removeCacheKeys(uuid, workspace)));
              }
          }
  
          CacheFactory factory = cacheModule.getCacheFactory();
          // flush each key from all caches
          for (Object key : keySet) {
              for (ContentCachingConfiguration config : cacheConfigs) {
                  final Cache cache = factory.getCache(config.getCacheName());
                  cache.remove(key);
              }
          }
          return true;
      }
 
     public String getUuid() {
         return uuid;
     }
 
     public void setUuid(String uuid) {
         this.uuid = uuid;
     }
 
     public String getWorkspace() {
         return workspace;
     }
 
     public void setWorkspace(String workspace) {
         this.workspace = workspace;
     }
 }