/*
    * 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.syncope.client.enduser.rest;
  
  import java.io.InputStream;
  import java.util.List;
  import javax.ws.rs.core.MediaType;
  import javax.ws.rs.core.Response;
  import org.apache.cxf.helpers.IOUtils;
  import org.apache.cxf.jaxrs.client.Client;
  import org.apache.cxf.jaxrs.client.WebClient;
  import org.apache.syncope.client.enduser.SyncopeEnduserSession;
  import org.apache.syncope.common.lib.to.BpmnProcess;
  import org.apache.syncope.common.rest.api.RESTHeaders;
  import org.apache.syncope.common.rest.api.service.BpmnProcessService;
  
  public class BpmnProcessRestClient extends BaseRestClient {
  
      private static final long serialVersionUID = 5049285686167071017L;
  
      private BpmnProcessService getService(final MediaType mediaType) {
          BpmnProcessService service = getService(BpmnProcessService.class);
          Client client = WebClient.client(service);
          client.type(mediaType);
          return service;
      }
  
      public List<BpmnProcess> getDefinitions() {
          return getService(BpmnProcessService.class).list();
      }
  
      public InputStream getDefinition(final MediaType mediaType, final String key) {
          Response response = getService(mediaType).get(key);
          SyncopeEnduserSession.get().resetClient(BpmnProcessService.class);
  
          return (InputStream) response.getEntity();
      }
  
      public byte[] getDiagram(final String key) {
          BpmnProcessService service = getService(BpmnProcessService.class);
          WebClient.client(service).accept(RESTHeaders.MEDIATYPE_IMAGE_PNG);
          Response response = service.exportDiagram(key);
  
          byte[] diagram;
          try {
              diagram = IOUtils.readBytesFromStream((InputStream) response.getEntity());
          } catch (Exception e) {
              LOG.error("Could not get workflow diagram", e);
              diagram = new byte[0];
          }
          return diagram;
      }
  }