如果最终用户没有回复，如何在一定时间后关闭文本提示

Question

在聊天机器人 SDK v4 Microsoft中，我想知道如何以编程方式关闭提示"任何类型的文本提示，确认提示......等"，如果用户没有回复，则在一段时间后结束对话。

我已经尝试使用settimeout并使用sc.endDialog，但它不起作用并给了我

private promptForNameStep = async (step: WaterfallStepContext<UserProfile>) => {
setTimeout(async () => {
   console.log('I am here!');
   await step.endDialog();
}, 5000);
        const userProfile = await this.userProfileAccessor.get(step.context);
        if (userProfile.name === undefined) {
            // prompt for name, if missing
            return await step.prompt(NAME_PROMPT, i18n.__('salutation.your_name'));
        }
        return await step.next();
    }

(node:21084) UnhandledPromiseRejectionWarning: TypeError: Cannot perform 'get' on a proxy that has been revoked
    at UserState.load (/Users/macbook/Workspace/bot/chatbot/templates/Enterprise-Template/src/typescript/enterprise-bot/node_modules/botbuilder-core/src/botState.ts:84:48)
    at BotStatePropertyAccessor.get (/Users/macbook/Workspace/bot/chatbot/templates/Enterprise-Template/src/typescript/enterprise-bot/node_modules/botbuilder-core/src/botStatePropertyAccessor.ts:97:43)
    at SkillDialog.getStateFromAccessor (/Users/macbook/Workspace/bot/chatbot/templates/Enterprise-Template/src/typescript/enterprise-bot/src/dialogs/skill/skillDialog.ts:164:68)
    at SkillDialog.executeStep (/Users/macbook/Workspace/bot/chatbot/templates/Enterprise-Template/src/typescript/enterprise-bot/src/dialogs/skill/skillDialog.ts:91:47)
    at Array.stepsMethods.push (/Users/macbook/Workspace/bot/chatbot/templates/Enterprise-Template/src/typescript/enterprise-bot/src/dialogs/skill/skillDialog.ts:149:29)
    at WaterfallDialog.onStep (/Users/macbook/Workspace/bot/chatbot/templates/Enterprise-Template/src/typescript/enterprise-bot/node_modules/botbuilder-dialogs/src/waterfallDialog.ts:198:44)
    at WaterfallDialog.runStep (/Users/macbook/Workspace/bot/chatbot/templates/Enterprise-Template/src/typescript/enterprise-bot/node_modules/botbuilder-dialogs/src/waterfallDialog.ts:225:31)
    at WaterfallDialog.resumeDialog (/Users/macbook/Workspace/bot/chatbot/templates/Enterprise-Template/src/typescript/enterprise-bot/node_modules/botbuilder-dialogs/src/waterfallDialog.ts:166:27)
    at WaterfallStepContext.endDialog (/Users/macbook/Workspace/bot/chatbot/templates/Enterprise-Template/src/typescript/enterprise-bot/node_modules/botbuilder-dialogs/src/dialogContext.ts:269:33)
    at <anonymous>
(node:21084) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 4)
(node:21084) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

我希望对话框关闭，但我收到上述错误。

Answer 1

使用超时结束对话不是一种好的做法，因为在横向扩展时，消息可能会路由到机器人的不同实例，并且超时不会正确取消。更好的方法是在 userState 中保存用户上次向机器人发送消息的时间，并在用户下次向机器人发送消息时检查时差，然后再进行响应。看看下面的代码片段。

const TIMEOUT = 5000;
...
 // Prompts
  async promptForName(step) {
    this.profileAccessor.set(step.context, { lastMessage: new Date() });    
    return await step.prompt(NAME_PROMPT, "What is your name?");
  }
  async captureName(step) {
    const profile = await this.profileAccessor.get(step.context);
    if (new Date().getTime() - new Date(profile.lastMessage).getTime() < TIMEOUT) {
      profile.name = step.result;
      profile.lastMessage = new Date();
      this.profileAccessor.set(step.context, profile);
      await this.userState.saveChanges(step.context);
      return await step.next();
    } else {
      await step.context.sendActivity("Sorry, you took too long to respond");
      return await step.endDialog();
    }
  }

希望这有帮助！