feat: 支持回退按钮

(cherry picked from commit de79e79d91)

src/views/bpm/processInstance/detail/TaskRollbackDialogForm.vue

@@ -0,0 +1,90 @@
+<template>
+  <Dialog v-model="dialogVisible" title="回退" width="500">
+    <el-form
+      ref="formRef"
+      v-loading="formLoading"
+      :model="formData"
+      :rules="formRules"
+      label-width="110px"
+    >
+      <el-form-item label="退回节点" prop="targetDefinitionKey">
+        <el-select v-model="formData.targetDefinitionKey" clearable style="width: 100%">
+          <el-option
+            v-for="item in returnList"
+            :key="item.taskDefinitionKey"
+            :label="item.name"
+            :value="item.taskDefinitionKey"
+          />
+        </el-select>
+      </el-form-item>
+      <el-form-item label="回退理由" prop="reason">
+        <el-input v-model="formData.reason" clearable placeholder="请输入回退理由" />
+      </el-form-item>
+    </el-form>
+    <template #footer>
+      <el-button :disabled="formLoading" type="primary" @click="submitForm">确 定</el-button>
+      <el-button @click="dialogVisible = false">取 消</el-button>
+    </template>
+  </Dialog>
+</template>
+<script lang="ts" name="TaskRollbackDialogForm" setup>
+import * as TaskApi from '@/api/bpm/task'
+
+const message = useMessage() // 消息弹窗
+const dialogVisible = ref(false) // 弹窗的是否展示
+const formLoading = ref(false) // 表单的加载中
+const formData = ref({
+  id: '',
+  targetDefinitionKey: undefined,
+  reason: ''
+})
+const formRules = ref({
+  targetDefinitionKey: [{ required: true, message: '必须选择回退节点', trigger: 'change' }],
+  reason: [{ required: true, message: '回退理由不能为空', trigger: 'blur' }]
+})
+
+const formRef = ref() // 表单 Ref
+const returnList = ref([])
+/** 打开弹窗 */
+const open = async (id: string) => {
+  returnList.value = await TaskApi.getReturnList({ taskId: id })
+  if (returnList.value.length === 0) {
+    message.warning('当前没有可回退的节点')
+    return false
+  }
+  dialogVisible.value = true
+  resetForm()
+  formData.value.id = id
+}
+defineExpose({ open }) // 提供 openModal 方法，用于打开弹窗
+
+/** 提交表单 */
+const emit = defineEmits(['success']) // 定义 success 事件，用于操作成功后的回调
+const submitForm = async () => {
+  // 校验表单
+  if (!formRef) return
+  const valid = await formRef.value.validate()
+  if (!valid) return
+  // 提交请求
+  formLoading.value = true
+  try {
+    await TaskApi.okRollback(formData.value)
+    message.success('回退成功')
+    dialogVisible.value = false
+    // 发送操作成功的事件
+    emit('success')
+  } finally {
+    formLoading.value = false
+  }
+}
+
+/** 重置表单 */
+const resetForm = () => {
+  formData.value = {
+    id: '',
+    targetDefinitionKey: undefined,
+    reason: ''
+  }
+  formRef.value?.resetFields()
+}
+</script>