feat: manually mirror opencoze's code from bytedance

Change-Id: I09a73aadda978ad9511264a756b2ce51f5761adf

frontend/packages/workflow/playground/src/utils/get-is-init-workflow.ts

@@ -0,0 +1,78 @@
+/*
+ * Copyright 2025 coze-dev Authors
+ *
+ * Licensed 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.
+ */
+ 
+import {
+  type WorkflowNodeJSON,
+  type WorkflowJSON,
+} from '@flowgram-adapter/free-layout-editor';
+import { WorkflowMode } from '@coze-workflow/base';
+
+function getIsInitStartOuputs(
+  initStartNode: WorkflowNodeJSON,
+  flowMode: WorkflowMode,
+) {
+  if (flowMode === WorkflowMode.Workflow) {
+    return (
+      initStartNode?.data?.outputs?.length === 1 ||
+      (initStartNode?.data?.outputs?.length === 2 &&
+        !initStartNode.data.outputs[1]?.name &&
+        initStartNode.data.outputs[1]?.required &&
+        initStartNode.data.outputs[1].type === 'string' &&
+        !initStartNode.data.outputs[1]?.assistType &&
+        !initStartNode.data.outputs[1]?.description)
+    );
+  } else if (flowMode === WorkflowMode.ChatFlow) {
+    return (
+      initStartNode?.data?.outputs?.length === 2 &&
+      initStartNode.data.outputs[0]?.name === 'USER_INPUT' &&
+      initStartNode.data.outputs[1]?.name === 'CONVERSATION_NAME'
+    );
+  }
+}
+
+/**
+ *
+ * 判断当前工作流是否是初始状态
+ * - 节点数量为 2
+ * - 没有边
+ * - 开始节点只有一个输入 或者 有两个输入，但第二个输入参数为默认状态
+ * - 结束节点只有一个有效输出 或者 表单配置了多个输出变量，但都为默认状态
+ */
+export const getIsInitWorkflow = (
+  workflowShcmaJson: WorkflowJSON,
+  flowMode: WorkflowMode,
+) => {
+  if (!workflowShcmaJson) {
+    return false;
+  }
+  const isInitNodesNum = workflowShcmaJson.nodes?.length === 2;
+  if (!isInitNodesNum) {
+    return false;
+  }
+  const isHasEdge = workflowShcmaJson.edges?.length;
+  if (isHasEdge) {
+    return false;
+  }
+  const initStartNode = workflowShcmaJson.nodes[0];
+  const initEndNode = workflowShcmaJson.nodes[1];
+
+  const isInitStartOuputs = getIsInitStartOuputs(initStartNode, flowMode);
+  const isInitStart = !initStartNode?.edges && isInitStartOuputs;
+  const isInitEnd =
+    !initEndNode?.edges &&
+    initEndNode?.data?.inputs?.inputParameters?.length === 1;
+  return isInitStart && isInitEnd;
+};