package com.fh.controller.activiti.editor.model;

import org.activiti.editor.constants.ModelDataJsonConstants;
import org.activiti.engine.ActivitiException;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.repository.Model;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;

/** 
 * 类名称：ModelEditorJsonRestResources
 * 创建人：acticiti官方源码 fh313596790qq(青苔)
 * 更新时间：2017年12月25日
 * @version
 */
@RestController
public class ModelEditorJsonRestResources implements ModelDataJsonConstants {
  
  protected static final Logger LOGGER = LoggerFactory.getLogger(ModelEditorJsonRestResources.class);
  
  @Autowired
  private RepositoryService repositoryService;
  
  @Autowired
  private ObjectMapper objectMapper;

  @RequestMapping(value="/model/{modelId}/json", method = RequestMethod.GET, produces = "application/json")
  public ObjectNode getEditorJson(@PathVariable String modelId) {
    ObjectNode modelNode = null;
    Model model = repositoryService.getModel(modelId);
    if (model != null) {
      try {
        if (StringUtils.isNotEmpty(model.getMetaInfo())) {
          modelNode = (ObjectNode) objectMapper.readTree(model.getMetaInfo());
        } else {
          modelNode = objectMapper.createObjectNode();
          modelNode.put(MODEL_NAME, model.getName());
        }
        modelNode.put(MODEL_ID, model.getId());
        ObjectNode editorJsonNode = (ObjectNode) objectMapper.readTree(
            new String(repositoryService.getModelEditorSource(model.getId()), "utf-8"));
        modelNode.put("model", editorJsonNode);
      } catch (Exception e) {
        LOGGER.error("Error creating model JSON", e);
        throw new ActivitiException("Error creating model JSON", e);
      }
    }
    return modelNode;
  }
}