package org.dromara.workflow.service.impl;
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import cn.hutool.core.collection.CollUtil;
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import cn.hutool.core.lang.Validator;
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import cn.hutool.core.util.ArrayUtil;
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import cn.hutool.core.util.ObjectUtil;
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import cn.hutool.core.util.StrUtil;
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import cn.hutool.core.util.ZipUtil;
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import cn.hutool.json.JSONUtil;
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import jakarta.servlet.http.HttpServletResponse;
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import lombok.RequiredArgsConstructor;
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import org.apache.batik.transcoder.TranscoderInput;
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import org.apache.batik.transcoder.TranscoderOutput;
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import org.apache.batik.transcoder.image.PNGTranscoder;
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import org.apache.commons.io.IOUtils;
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import org.apache.commons.lang3.StringUtils;
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import org.dromara.common.core.exception.ServiceException;
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import org.dromara.common.mybatis.core.page.TableDataInfo;
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import org.dromara.common.tenant.helper.TenantHelper;
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import org.dromara.workflow.common.constant.FlowConstant;
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import org.dromara.workflow.domain.bo.ModelBo;
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import org.dromara.workflow.domain.vo.ModelVo;
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import org.dromara.workflow.service.IActModelService;
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import org.dromara.workflow.utils.ModelUtils;
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import org.flowable.bpmn.model.BpmnModel;
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import org.flowable.engine.RepositoryService;
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import org.flowable.engine.repository.Deployment;
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import org.flowable.engine.repository.Model;
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import org.flowable.engine.repository.ModelQuery;
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import org.flowable.engine.repository.ProcessDefinition;
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import org.flowable.validation.ValidationError;
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import org.springframework.stereotype.Service;
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import org.springframework.transaction.annotation.Transactional;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.net.URLEncoder;
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import java.nio.charset.StandardCharsets;
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import java.util.*;
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import java.util.stream.Collectors;
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import java.util.zip.ZipEntry;
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import java.util.zip.ZipOutputStream;
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/**
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* 模型管理 服务层实现
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*
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* @author may
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*/
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@RequiredArgsConstructor
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@Service
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public class ActModelServiceImpl implements IActModelService {
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private final RepositoryService repositoryService;
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/**
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* 分页查询模型
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*
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* @param modelBo 模型参数
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* @return 返回分页列表
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*/
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@Override
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public TableDataInfo<Model> page(ModelBo modelBo) {
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ModelQuery query = repositoryService.createModelQuery();
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query.modelTenantId(TenantHelper.getTenantId());
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if (StringUtils.isNotEmpty(modelBo.getName())) {
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query.modelNameLike("%" + modelBo.getName() + "%");
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}
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if (StringUtils.isNotEmpty(modelBo.getKey())) {
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query.modelKey(modelBo.getKey());
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}
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if (StringUtils.isNotEmpty(modelBo.getCategoryCode())) {
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query.modelCategory(modelBo.getCategoryCode());
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}
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query.orderByLastUpdateTime().desc();
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// 创建时间降序排列
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query.orderByCreateTime().desc();
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// 分页查询
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List<Model> modelList = query.listPage(modelBo.getPageNum(), modelBo.getPageSize());
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// 总记录数
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long total = query.count();
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return new TableDataInfo<>(modelList, total);
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}
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/**
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* 新增模型
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*
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* @param modelBo 模型请求对象
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* @return 结果
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*/
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@Override
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@Transactional(rollbackFor = Exception.class)
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public boolean saveNewModel(ModelBo modelBo) {
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try {
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int version = 0;
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String key = modelBo.getKey();
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String name = modelBo.getName();
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String description = modelBo.getDescription();
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String categoryCode = modelBo.getCategoryCode();
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String xml = modelBo.getXml();
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Model checkModel = repositoryService.createModelQuery().modelKey(key).modelTenantId(TenantHelper.getTenantId()).singleResult();
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if (ObjectUtil.isNotNull(checkModel)) {
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throw new ServiceException("模型key已存在！");
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}
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//初始空的模型
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Model model = repositoryService.newModel();
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model.setKey(key);
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model.setName(name);
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model.setVersion(version);
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model.setCategory(categoryCode);
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model.setMetaInfo(description);
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model.setTenantId(TenantHelper.getTenantId());
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//保存初始化的模型基本信息数据
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repositoryService.saveModel(model);
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repositoryService.addModelEditorSource(model.getId(), StrUtil.utf8Bytes(xml));
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return true;
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} catch (Exception e) {
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e.printStackTrace();
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throw new ServiceException(e.getMessage());
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}
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}
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/**
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* 查询模型
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*
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* @param id 模型id
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* @return 模型数据
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*/
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@Override
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public ModelVo getInfo(String id) {
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ModelVo modelVo = new ModelVo();
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Model model = repositoryService.getModel(id);
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if (model != null) {
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try {
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byte[] modelEditorSource = repositoryService.getModelEditorSource(model.getId());
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modelVo.setXml(StrUtil.utf8Str(modelEditorSource));
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modelVo.setId(model.getId());
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modelVo.setKey(model.getKey());
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modelVo.setName(model.getName());
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modelVo.setCategoryCode(model.getCategory());
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modelVo.setDescription(model.getMetaInfo());
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return modelVo;
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} catch (Exception e) {
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throw new ServiceException(e.getMessage());
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}
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}
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return modelVo;
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}
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/**
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* 修改模型信息
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*
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* @param modelBo 模型数据
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* @return 结果
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*/
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@Override
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public boolean update(ModelBo modelBo) {
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try {
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Model model = repositoryService.getModel(modelBo.getId());
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List<Model> list = repositoryService.createModelQuery().modelTenantId(TenantHelper.getTenantId()).modelKey(modelBo.getKey()).list();
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list.stream().filter(e -> !e.getId().equals(model.getId())).findFirst().ifPresent(e -> {
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throw new ServiceException("模型KEY已存在！");
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});
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model.setCategory(modelBo.getCategoryCode());
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model.setMetaInfo(modelBo.getDescription());
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repositoryService.saveModel(model);
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} catch (Exception e) {
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throw new ServiceException(e.getMessage());
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}
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return true;
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}
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/**
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* 编辑模型XML
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*
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* @param modelBo 模型数据
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* @return 结果
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*/
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@Override
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@Transactional(rollbackFor = Exception.class)
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public boolean editModelXml(ModelBo modelBo) {
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try {
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String xml = modelBo.getXml();
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String svg = modelBo.getSvg();
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String modelId = modelBo.getId();
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String key = modelBo.getKey();
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String name = modelBo.getName();
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BpmnModel bpmnModel = ModelUtils.xmlToBpmnModel(xml);
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ModelUtils.checkBpmnModel(bpmnModel);
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Model model = repositoryService.getModel(modelId);
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List<Model> list = repositoryService.createModelQuery().modelTenantId(TenantHelper.getTenantId()).modelKey(key).list();
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list.stream().filter(e -> !e.getId().equals(model.getId())).findFirst().ifPresent(e -> {
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throw new ServiceException("模型KEY已存在！");
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});
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// 校验key命名规范
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if (!Validator.isMatchRegex(FlowConstant.MODEL_KEY_PATTERN, key)) {
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throw new ServiceException("模型标识KEY只能字符或者下划线开头！");
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}
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model.setKey(key);
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model.setName(name);
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model.setVersion(model.getVersion() + 1);
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repositoryService.saveModel(model);
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repositoryService.addModelEditorSource(model.getId(), StrUtil.utf8Bytes(xml));
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// 转换图片
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InputStream svgStream = new ByteArrayInputStream(StrUtil.utf8Bytes(svg));
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TranscoderInput input = new TranscoderInput(svgStream);
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PNGTranscoder transcoder = new PNGTranscoder();
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ByteArrayOutputStream outStream = new ByteArrayOutputStream();
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TranscoderOutput output = new TranscoderOutput(outStream);
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transcoder.transcode(input, output);
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final byte[] result = outStream.toByteArray();
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repositoryService.addModelEditorSourceExtra(model.getId(), result);
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return true;
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} catch (Exception e) {
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e.printStackTrace();
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throw new ServiceException(e.getMessage());
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}
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}
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/**
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* 模型部署
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*
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* @param id 模型id
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* @return 结果
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*/
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@Override
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@Transactional(rollbackFor = Exception.class)
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public boolean modelDeploy(String id) {
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try {
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// 查询流程定义模型xml
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byte[] xmlBytes = repositoryService.getModelEditorSource(id);
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if (ArrayUtil.isEmpty(xmlBytes)) {
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throw new ServiceException("模型数据为空，请先设计流程定义模型，再进行部署！");
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}
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if (JSONUtil.isTypeJSON(IOUtils.toString(xmlBytes, StandardCharsets.UTF_8.toString()))) {
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byte[] bytes = ModelUtils.bpmnJsonToXmlBytes(xmlBytes);
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if (ArrayUtil.isEmpty(bytes)) {
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throw new ServiceException("模型不能为空，请至少设计一条主线流程！");
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}
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}
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BpmnModel bpmnModel = ModelUtils.xmlToBpmnModel(xmlBytes);
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// 校验模型
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ModelUtils.checkBpmnModel(bpmnModel);
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List<ValidationError> validationErrors = repositoryService.validateProcess(bpmnModel);
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if (CollUtil.isNotEmpty(validationErrors)) {
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String errorMsg = validationErrors.stream().map(ValidationError::getProblem).distinct().collect(Collectors.joining(","));
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throw new ServiceException(errorMsg);
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}
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// 查询模型的基本信息
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Model model = repositoryService.getModel(id);
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// xml资源的名称 ，对应act_ge_bytearray表中的name_字段
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String processName = model.getName() + ".bpmn20.xml";
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// 调用部署相关的api方法进行部署流程定义
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Deployment deployment = repositoryService.createDeployment()
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// 部署名称
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.name(model.getName())
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// 部署标识key
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.key(model.getKey())
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// 部署流程分类
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.category(model.getCategory())
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// bpmn20.xml资源
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.addBytes(processName, xmlBytes)
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// 租户id
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.tenantId(TenantHelper.getTenantId())
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.deploy();
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// 更新 部署id 到流程定义模型数据表中
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model.setDeploymentId(deployment.getId());
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repositoryService.saveModel(model);
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// 更新分类
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ProcessDefinition definition = repositoryService.createProcessDefinitionQuery().deploymentId(deployment.getId()).singleResult();
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repositoryService.setProcessDefinitionCategory(definition.getId(), model.getCategory());
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return true;
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} catch (Exception e) {
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e.printStackTrace();
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throw new ServiceException(e.getMessage());
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}
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}
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/**
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* 导出模型zip压缩包
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*
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* @param modelId 模型id
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* @param response 相应
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*/
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@Override
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public void exportZip(String modelId, HttpServletResponse response) {
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ZipOutputStream zos = null;
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try {
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zos = ZipUtil.getZipOutputStream(response.getOutputStream(), StandardCharsets.UTF_8);
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// 压缩包文件名
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String zipName = "模型不存在";
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// 查询模型基本信息
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Model model = repositoryService.getModel(modelId);
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byte[] xmlBytes = repositoryService.getModelEditorSource(modelId);
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if (ObjectUtil.isNotNull(model)) {
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if (JSONUtil.isTypeJSON(IOUtils.toString(xmlBytes, StandardCharsets.UTF_8.toString())) && ArrayUtil.isEmpty(ModelUtils.bpmnJsonToXmlBytes(xmlBytes))) {
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zipName = "模型不能为空，请至少设计一条主线流程！";
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zos.putNextEntry(new ZipEntry(zipName + ".txt"));
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zos.write(zipName.getBytes(StandardCharsets.UTF_8));
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} else if (ArrayUtil.isEmpty(xmlBytes)) {
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zipName = "模型数据为空，请先设计流程定义模型，再进行部署！";
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zos.putNextEntry(new ZipEntry(zipName + ".txt"));
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zos.write(zipName.getBytes(StandardCharsets.UTF_8));
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} else {
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String fileName = model.getName() + "-" + model.getKey();
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// 压缩包文件名
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zipName = fileName + ".zip";
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// 将xml添加到压缩包中(指定xml文件名：请假流程.bpmn20.xml
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zos.putNextEntry(new ZipEntry(fileName + ".bpmn20.xml"));
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zos.write(xmlBytes);
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}
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}
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response.setHeader("Content-Disposition",
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"attachment; filename=" + URLEncoder.encode(zipName, StandardCharsets.UTF_8) + ".zip");
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// 刷出响应流
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response.flushBuffer();
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} catch (IOException e) {
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e.printStackTrace();
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} finally {
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if (zos != null) {
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try {
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zos.closeEntry();
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zos.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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}
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}
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