feat(bpm): 支持流程评论接口

- 新增流程评论创建、列表查询接口
- 封装 BpmCommentService 统一复用 Flowable Comment
- 评论列表返回评论人和对应任务信息
- 新增 BPM 评论类型字典与评论枚举
- 补充任务校验与历史任务 Map 查询能力

yudao-module-bpm/src/main/java/cn/iocoder/yudao/module/bpm/controller/admin/task/BpmTaskController.java

@@ -8,6 +8,7 @@ import cn.iocoder.yudao.module.bpm.controller.admin.task.vo.task.*;
 import cn.iocoder.yudao.module.bpm.convert.task.BpmTaskConvert;
 import cn.iocoder.yudao.module.bpm.dal.dataobject.definition.BpmFormDO;
 import cn.iocoder.yudao.module.bpm.dal.dataobject.definition.BpmProcessDefinitionInfoDO;
+import cn.iocoder.yudao.module.bpm.enums.task.BpmAttachmentTypeEnum;
 import cn.iocoder.yudao.module.bpm.service.definition.BpmFormService;
 import cn.iocoder.yudao.module.bpm.service.definition.BpmProcessDefinitionService;
 import cn.iocoder.yudao.module.bpm.service.task.BpmProcessInstanceService;
@@ -24,12 +25,14 @@ import jakarta.validation.Valid;
 import org.flowable.bpmn.model.UserTask;
 import org.flowable.engine.history.HistoricProcessInstance;
 import org.flowable.engine.runtime.ProcessInstance;
+import org.flowable.engine.task.Attachment;
 import org.flowable.task.api.Task;
 import org.flowable.task.api.history.HistoricTaskInstance;
 import org.springframework.security.access.prepost.PreAuthorize;
 import org.springframework.validation.annotation.Validated;
 import org.springframework.web.bind.annotation.*;
 
+import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 import java.util.Map;
@@ -95,7 +98,9 @@ public class BpmTaskController {
                 convertSet(processInstanceMap.values(), instance -> Long.valueOf(instance.getStartUserId())));
         Map<String, BpmProcessDefinitionInfoDO> processDefinitionInfoMap = processDefinitionService.getProcessDefinitionInfoMap(
                 convertSet(pageResult.getList(), HistoricTaskInstance::getProcessDefinitionId));
-        return success(BpmTaskConvert.INSTANCE.buildTaskPage(pageResult, processInstanceMap, userMap, null, processDefinitionInfoMap));
+        Map<String, List<Attachment>> taskAttachmentMap = getTaskAttachmentMap(pageResult.getList());
+        return success(BpmTaskConvert.INSTANCE.buildTaskPage(pageResult, processInstanceMap, userMap, null,
+                processDefinitionInfoMap, taskAttachmentMap));
     }
 
     @GetMapping("manager-page")
@@ -118,7 +123,9 @@ public class BpmTaskController {
                 convertSet(userMap.values(), AdminUserRespDTO::getDeptId));
         Map<String, BpmProcessDefinitionInfoDO> processDefinitionInfoMap = processDefinitionService.getProcessDefinitionInfoMap(
                 convertSet(pageResult.getList(), HistoricTaskInstance::getProcessDefinitionId));
-        return success(BpmTaskConvert.INSTANCE.buildTaskPage(pageResult, processInstanceMap, userMap, deptMap, processDefinitionInfoMap));
+        Map<String, List<Attachment>> taskAttachmentMap = getTaskAttachmentMap(pageResult.getList());
+        return success(BpmTaskConvert.INSTANCE.buildTaskPage(pageResult, processInstanceMap, userMap, deptMap,
+                processDefinitionInfoMap, taskAttachmentMap));
     }
 
     @GetMapping("/list-by-process-instance-id")
@@ -141,8 +148,9 @@ public class BpmTaskController {
         // 获得 Form Map
         Map<Long, BpmFormDO> formMap = formService.getFormMap(
                 convertSet(taskList, task -> NumberUtils.parseLong(task.getFormKey())));
+        Map<String, List<Attachment>> taskAttachmentMap = getTaskAttachmentMap(taskList);
         return success(BpmTaskConvert.INSTANCE.buildTaskListByProcessInstanceId(taskList,
-                formMap, userMap, deptMap));
+                formMap, userMap, deptMap, taskAttachmentMap));
     }
 
     @PutMapping("/approve")
@@ -244,4 +252,22 @@ public class BpmTaskController {
         return success(BpmTaskConvert.INSTANCE.buildTaskListByParentTaskId(taskList, userMap, deptMap));
     }
 
+    /**
+     * 获得任务附件 Map
+     *
+     * @param taskList 历史任务列表
+     * @return 任务附件 Map，key 为任务编号
+     */
+    private Map<String, List<Attachment>> getTaskAttachmentMap(List<HistoricTaskInstance> taskList) {
+        // 1.1 获得流程实例的任务 Map
+        Map<String, List<HistoricTaskInstance>> processTaskMap = convertMultiMap(taskList,
+                HistoricTaskInstance::getProcessInstanceId);
+        // 1.2 获得任务附件列表
+        List<Attachment> attachments = new ArrayList<>();
+        processTaskMap.forEach((processInstanceId, tasks) -> attachments.addAll(taskService.getAttachments(
+                processInstanceId, convertSet(tasks, HistoricTaskInstance::getId), BpmAttachmentTypeEnum.TASK_ATTACHMENT)));
+        // 2. 返回 Map
+        return convertMultiMap(attachments, Attachment::getTaskId);
+    }
+
 }

yudao-module-bpm/src/main/java/cn/iocoder/yudao/module/bpm/controller/admin/task/vo/task/BpmTaskRespVO.java

@@ -35,6 +35,12 @@ public class BpmTaskRespVO {
     @Schema(description = "审批理由", requiredMode = Schema.RequiredMode.REQUIRED, example = "2")
     private String reason;
 
+    @Schema(description = "签名", example = "https://www.iocoder.cn/sign.png")
+    private String signPicUrl;
+
+    @Schema(description = "附件", example = "[https://test.yudao.iocoder.cn/20260609/test.txt]")
+    private List<String> attachments;
+
     @Schema(description = "任务负责人编号", requiredMode = Schema.RequiredMode.NOT_REQUIRED, example = "2048")
     @JsonIgnore // 不返回，只是方便后续读取，赋值给 ownerUser
     private Long owner;

yudao-module-bpm/src/main/java/cn/iocoder/yudao/module/bpm/convert/task/BpmTaskConvert.java

@@ -18,6 +18,7 @@ import cn.iocoder.yudao.module.system.api.dept.dto.DeptRespDTO;
 import cn.iocoder.yudao.module.system.api.user.dto.AdminUserRespDTO;
 import org.flowable.engine.history.HistoricProcessInstance;
 import org.flowable.engine.runtime.ProcessInstance;
+import org.flowable.engine.task.Attachment;
 import org.flowable.task.api.Task;
 import org.flowable.task.api.history.HistoricTaskInstance;
 import org.flowable.task.service.impl.persistence.entity.TaskEntityImpl;
@@ -64,10 +65,12 @@ public interface BpmTaskConvert {
                                                     Map<String, HistoricProcessInstance> processInstanceMap,
                                                     Map<Long, AdminUserRespDTO> userMap,
                                                     Map<Long, DeptRespDTO> deptMap,
-                                                    Map<String, BpmProcessDefinitionInfoDO> processDefinitionInfoMap) {
+                                                    Map<String, BpmProcessDefinitionInfoDO> processDefinitionInfoMap,
+                                                    Map<String, List<Attachment>> taskAttachmentMap) {
         List<BpmTaskRespVO> taskVOList = CollectionUtils.convertList(pageResult.getList(), task -> {
             BpmTaskRespVO taskVO = BeanUtils.toBean(task, BpmTaskRespVO.class);
             taskVO.setStatus(FlowableUtils.getTaskStatus(task)).setReason(FlowableUtils.getTaskReason(task));
+            buildTaskEvidence(taskVO, task, taskAttachmentMap);
             // 用户信息
             AdminUserRespDTO assignUser = userMap.get(NumberUtils.parseLong(task.getAssignee()));
             if (assignUser != null) {
@@ -92,7 +95,8 @@ public interface BpmTaskConvert {
     default List<BpmTaskRespVO> buildTaskListByProcessInstanceId(List<HistoricTaskInstance> taskList,
                                                                  Map<Long, BpmFormDO> formMap,
                                                                  Map<Long, AdminUserRespDTO> userMap,
-                                                                 Map<Long, DeptRespDTO> deptMap) {
+                                                                 Map<Long, DeptRespDTO> deptMap,
+                                                                 Map<String, List<Attachment>> taskAttachmentMap) {
         return CollectionUtils.convertList(taskList, task -> {
             // 特殊：已取消的任务，不返回
             BpmTaskRespVO taskVO = BeanUtils.toBean(task, BpmTaskRespVO.class);
@@ -101,6 +105,7 @@ public interface BpmTaskConvert {
                 return null;
             }
             taskVO.setStatus(taskStatus).setReason(FlowableUtils.getTaskReason(task));
+            buildTaskEvidence(taskVO, task, taskAttachmentMap);
             // 表单信息
             BpmFormDO form = MapUtil.get(formMap, NumberUtils.parseLong(task.getFormKey()), BpmFormDO.class);
             if (form != null) {
@@ -195,6 +200,20 @@ public interface BpmTaskConvert {
         }
     }
 
+    /**
+     * 构建任务审批证据
+     *
+     * @param taskVO            任务 VO
+     * @param task              历史任务
+     * @param taskAttachmentMap 任务附件 Map
+     */
+    default void buildTaskEvidence(BpmTaskRespVO taskVO, HistoricTaskInstance task,
+                                   Map<String, List<Attachment>> taskAttachmentMap) {
+        taskVO.setSignPicUrl(FlowableUtils.getTaskSignPicUrl(task));
+        taskVO.setAttachments(convertList(
+                taskAttachmentMap != null ? taskAttachmentMap.get(task.getId()) : null, Attachment::getUrl));
+    }
+
     /**
      * 将父任务的属性，拷贝到子任务（加签任务）
      * <p>