feat: manually mirror opencoze's code from bytedance

Change-Id: I09a73aadda978ad9511264a756b2ce51f5761adf

frontend/packages/workflow/nodes/src/service/index.ts

@@ -0,0 +1,17 @@
+/*
+ * 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.
+ */
+ 
+export * from './workflow-nodes-service';

frontend/packages/workflow/nodes/src/service/workflow-nodes-service.ts

@@ -0,0 +1,122 @@
+/*
+ * 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 { customAlphabet } from 'nanoid';
+import { inject, injectable } from 'inversify';
+import { FlowNodeFormData } from '@flowgram-adapter/free-layout-editor';
+import { EntityManager } from '@flowgram-adapter/free-layout-editor';
+import { WorkflowNodeEntity } from '@flowgram-adapter/free-layout-editor';
+import { Emitter } from '@flowgram-adapter/common';
+
+import { type FormNodeMeta } from '../typings';
+import { DEFAULT_NODE_META_PATH } from '../constants';
+
+@injectable()
+export class WorkflowNodesService {
+  protected onNodesTitleChangeEmitter = new Emitter<void>();
+  @inject(EntityManager) protected readonly entityManager: EntityManager;
+  private nanoid = customAlphabet('1234567890', 5);
+  /**
+   * 节点标题变化
+   */
+  readonly onNodesTitleChange = this.onNodesTitleChangeEmitter.event;
+
+  /**
+   * 节点标题更新
+   * @param node
+   */
+  getNodeTitle(node: WorkflowNodeEntity): string {
+    const formData = node.getData<FlowNodeFormData>(FlowNodeFormData);
+    const nodeMeta = formData.formModel.getFormItemValueByPath<FormNodeMeta>(
+      DEFAULT_NODE_META_PATH,
+    );
+
+    return nodeMeta?.title || '';
+  }
+
+  /**
+   * 获取所有节点
+   */
+  getAllNodes(ignoreNode?: WorkflowNodeEntity): WorkflowNodeEntity[] {
+    return this.entityManager
+      .getEntities<WorkflowNodeEntity>(WorkflowNodeEntity)
+      .filter(n => n.id !== 'root' && n !== ignoreNode);
+  }
+  /**
+   * 获取所有节点的标题
+   */
+  getAllTitles(ignoreNode?: WorkflowNodeEntity): string[] {
+    return this.getAllNodes(ignoreNode).map(node => this.getNodeTitle(node));
+  }
+  /**
+   * 获取开始节点
+   */
+  getStartNode(): WorkflowNodeEntity {
+    return this.entityManager
+      .getEntities<WorkflowNodeEntity>(WorkflowNodeEntity)
+      .find(node => node.isStart) as WorkflowNodeEntity;
+  }
+  /**
+   * 触发节点标题更新事件
+   */
+  fireNodesTitleChange(): void {
+    this.onNodesTitleChangeEmitter.fire();
+  }
+
+  /**
+   * 创建不会重复的title
+   *
+   * abc_1 -> abc_2
+   */
+
+  createUniqTitle(
+    titlePrefix: string,
+    ignoreNode?: WorkflowNodeEntity | undefined,
+    ignoreTitles?: string[],
+  ): string {
+    const allTitles = this.getAllTitles(ignoreNode);
+    if (ignoreTitles) {
+      allTitles.push(...ignoreTitles);
+    }
+
+    const allTitlesSet = new Set(allTitles);
+
+    let startIndex = 0;
+    let newTitle = `${titlePrefix}`;
+
+    const matched = titlePrefix.match(/_([0-9]+)$/);
+    if (matched) {
+      startIndex = Number(matched[1]);
+      titlePrefix = titlePrefix.slice(0, matched.index);
+    }
+
+    while (allTitlesSet.has(newTitle)) {
+      startIndex += 1;
+      newTitle = `${titlePrefix}_${startIndex}`;
+    }
+    return newTitle;
+  }
+
+  /** 创建唯一ID */
+  createUniqID() {
+    let id: string;
+    do {
+      // 防止 id 以 0 开头，后端会转成 int64 导致 0 丢失，从而一些 id 匹配不上
+      id = `1${this.nanoid()}`;
+    } while (this.entityManager.getEntityById(id));
+    return id;
+  }
+}