content: /*
   *  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.causeway.viewer.wicket.ui.components.download;
  
  import java.io.File;
  
  import org.apache.wicket.markup.ComponentTag;
  import org.apache.wicket.markup.html.link.DownloadLink;
  import org.apache.wicket.model.IModel;
  import org.apache.wicket.util.encoding.UrlEncoder;
  
  import org.apache.causeway.applib.value.NamedWithMimeType.CommonMimeType;
  import org.apache.causeway.viewer.wicket.ui.util.Wkt;
  
  public class FileDownloadLink extends DownloadLink {
  
      private static final long serialVersionUID = 1L;
  
      private final CommonMimeType mime;
      private final String fileName;
  
      public FileDownloadLink(
              final String id, final CommonMimeType mime, final String fileName,
              final IModel<File> model) {
          super(id, model, fileName);
          this.mime = mime;
          this.fileName = fileName;
      }
  
      @Override
      public void onClick() {
          // lazily creates a temporary file on the host, to be consumed for download and then deleted by this handler
          Wkt.fileDownloadClickHandler(getModel(), mime, fileName);
      }
  
      @Override
      protected void onComponentTag(final ComponentTag tag) {
          super.onComponentTag(tag);
          var encodedFileName =
                  UrlEncoder.QUERY_INSTANCE.encode(fileName, getRequest().getCharset());
          tag.put("download", encodedFileName);
      }
  
  }
  