/*
    * 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.core.flowable.impl;
  
  import com.fasterxml.jackson.databind.json.JsonMapper;
  import com.fasterxml.jackson.databind.node.ObjectNode;
  import java.io.ByteArrayInputStream;
  import java.io.InputStream;
  import java.io.InputStreamReader;
  import javax.xml.stream.XMLInputFactory;
  import javax.xml.stream.XMLStreamException;
  import javax.xml.stream.XMLStreamReader;
  import org.apache.syncope.core.workflow.api.WorkflowException;
  import org.flowable.bpmn.converter.BpmnXMLConverter;
  import org.flowable.bpmn.model.BpmnModel;
  import org.flowable.common.engine.api.FlowableException;
  import org.flowable.editor.constants.ModelDataJsonConstants;
  import org.flowable.editor.language.json.converter.BpmnJsonConverter;
  import org.flowable.engine.ProcessEngine;
  import org.flowable.engine.repository.Deployment;
  import org.flowable.engine.repository.Model;
  import org.flowable.engine.repository.ProcessDefinition;
  
  public final class FlowableDeployUtils {
  
      private static final JsonMapper MAPPER = JsonMapper.builder().findAndAddModules().build();
  
      private static final XMLInputFactory XML_INPUT_FACTORY = XMLInputFactory.newInstance();
  
      static {
          XML_INPUT_FACTORY.setProperty(XMLInputFactory.IS_SUPPORTING_EXTERNAL_ENTITIES, Boolean.FALSE);
          XML_INPUT_FACTORY.setProperty(XMLInputFactory.SUPPORT_DTD, Boolean.FALSE);
      }
  
      public static Deployment deployDefinition(
              final ProcessEngine engine, final String resourceName, final byte[] definition) {
  
          try {
              return engine.getRepositoryService().createDeployment().
                      addInputStream(resourceName, new ByteArrayInputStream(definition)).deploy();
          } catch (FlowableException e) {
              throw new WorkflowException("While importing " + resourceName, e);
          }
      }
  
      public static void deployModel(final ProcessEngine engine, final ProcessDefinition procDef) {
          XMLStreamReader xtr = null;
          try (InputStream bpmnStream = engine.getRepositoryService().
                  getResourceAsStream(procDef.getDeploymentId(), procDef.getResourceName());
               InputStreamReader isr = new InputStreamReader(bpmnStream);) {
  
              xtr = XML_INPUT_FACTORY.createXMLStreamReader(isr);
              BpmnModel bpmnModel = new BpmnXMLConverter().convertToBpmnModel(xtr);
  
              Model model = engine.getRepositoryService().newModel();
              ObjectNode modelObjectNode = MAPPER.createObjectNode();
              modelObjectNode.put(ModelDataJsonConstants.MODEL_NAME, procDef.getName());
              model.setMetaInfo(modelObjectNode.toString());
              model.setName(procDef.getName());
              model.setDeploymentId(procDef.getDeploymentId());
              model.setVersion(procDef.getVersion());
  
              engine.getRepositoryService().saveModel(model);
              engine.getRepositoryService().addModelEditorSource(
                      model.getId(),
                      new BpmnJsonConverter().convertToJson(bpmnModel).toString().getBytes());
          } catch (Exception e) {
              throw new WorkflowException("While importing " + procDef.getResourceName(), e);
          } finally {
              if (xtr != null) {
                  try {
                      xtr.close();
                  } catch (XMLStreamException e) {
                      // ignore
                  }
              }
          }
      }
  
      private FlowableDeployUtils() {
          // private constructor for static utility class
      }
  }