/**
    * This file Copyright (c) 2014-2018 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.contentapp.imageprovider;
  
  import info.magnolia.objectfactory.ComponentProvider;
  import info.magnolia.ui.api.app.SubAppContext;
  import info.magnolia.ui.api.app.SubAppDescriptor;
  import info.magnolia.ui.api.ioc.SubAppScoped;
  import info.magnolia.ui.contentapp.definition.ContentSubAppDescriptor;
  import info.magnolia.ui.imageprovider.ImageProvider;
  import info.magnolia.ui.imageprovider.definition.ImageProviderDefinition;
  
  import javax.inject.Inject;
  
  import com.google.inject.Provider;
  
  /**
   * Provides the {@link ImageProvider} as configured under current sub-app descriptor.
   *
   * @deprecated since 6.0. Use new framework and inject {@link info.magnolia.ui.contentapp.browser.preview.PreviewProvider} annotated with {@link info.magnolia.ui.framework.datasource.DatasourceComponent}.
   */
  @Deprecated
  @SubAppScoped
  public class ImageProviderProvider implements Provider<ImageProvider> {
  
      private ComponentProvider componentProvider;
  
      private SubAppContext subAppContext;
  
      private ImageProvider imageProvider;
  
      @Inject
      public ImageProviderProvider(ComponentProvider componentProvider, SubAppContext subAppContext) {
          this.componentProvider = componentProvider;
          this.subAppContext = subAppContext;
      }
  
      @Override
      public ImageProvider get() {
          if (imageProvider == null) {
              ImageProviderDefinition definition = resolveImageProviderDefinition();
              if (definition != null) {
                  imageProvider = componentProvider.newInstance(definition.getImageProviderClass(), definition);
              }
          }
          if (imageProvider == null) {
              imageProvider = new NullImageProvider();
          }
          return imageProvider;
      }
  
      protected ImageProviderDefinition resolveImageProviderDefinition() {
          SubAppDescriptor subAppDescriptor = subAppContext.getSubAppDescriptor();
          if (subAppDescriptor instanceof ContentSubAppDescriptor) {
              return ((ContentSubAppDescriptor) subAppDescriptor).getImageProvider();
          }
          return null;
      }
  
      /**
       * A void implementation of ImageProvider for those cases where imageProvider is not configured and cannot be injected otherwise.
       */
      private static class NullImageProvider implements ImageProvider {
  
          @Override
          public String getPortraitPath(Object itemId) {
              return null;
          }
 
         @Override
         public String getThumbnailPath(Object itemId) {
             return null;
         }
 
         @Override
         public String resolveIconClassName(String mimeType) {
             return null;
         }
 
         @Override
         public Object getThumbnailResource(Object itemId, String generator) {
             return null;
         }
     }
 
 }