/**
    * This file Copyright (c) 2015-2018 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.ui.framework.availability;
  
  import info.magnolia.config.registry.DefinitionProvider;
  import info.magnolia.config.registry.Registry;
  import info.magnolia.config.registry.RegistryFacade;
  import info.magnolia.jcr.util.NodeUtil;
  import info.magnolia.jcr.util.SessionUtil;
  import info.magnolia.ui.api.availability.AbstractAvailabilityRule;
  import info.magnolia.ui.vaadin.integration.jcr.JcrItemId;
  import info.magnolia.ui.vaadin.integration.jcr.JcrPropertyItemId;
  
  import java.util.Collection;
  
  import javax.inject.Inject;
  import javax.jcr.Node;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * This returns {@code true} if the item has {@link DefinitionProvider}.
   */
  public class IsDefinitionRule extends AbstractAvailabilityRule {
  
      private static final Logger log = LoggerFactory.getLogger(IsDefinitionRule.class);
  
      private final Collection<Registry> registries;
  
      @Inject
      public IsDefinitionRule(RegistryFacade registryFacade) {
          this.registries = registryFacade.all();
      }
  
      @Override
      protected boolean isAvailableForItem(Object itemId) {
          if (itemId instanceof JcrItemId && !(itemId instanceof JcrPropertyItemId)) {
              JcrItemId jcrItemId = (JcrItemId) itemId;
              Node node = SessionUtil.getNodeByIdentifier(jcrItemId.getWorkspace(), jcrItemId.getUuid());
              if (node != null) {
                  try {
                      String nodePath = node.getPath();
                      return hasDefinitionFor(nodePath);
                  } catch (Exception e) {
                      log.warn("Error evaluating availability for node [{}], returning false: {}", NodeUtil.getPathIfPossible(node), e.getMessage());
                  }
              }
          }
          return false;
      }
  
      @SuppressWarnings("unchecked")
      private boolean hasDefinitionFor(String nodePath) {
          // We're doing this stuff in a sub-optimal way unless the issue MAGNOLIA-6086 is fixed
          for (Registry registry : registries) {
              Collection<DefinitionProvider> providers = registry.getAllProviders();
              for (DefinitionProvider provider : providers) {
                  if (provider.getMetadata().getLocation().equals(nodePath)) {
                      return true;
                  }
              }
          }
          return false;
      }
  }