Discord JS机器人答题Collector异常：超时无响应无法切换问题

问题说明 #

我开发的Discord问答机器人，在设置10秒答题时限后，若无人在规定时间内答对，机器人没有任何反馈，停留在当前问题。相关代码如下：

问题数组 #

const questions = [
  {
    question: "What is the capital of France?",
    answer: "Paris",
  },
  {
    question: "Who is the best barcelona player of all history?",
    answer: "Messi",
  },
];

现有脚本 #

client.on('messageCreate', async message => {
//...

const handleQuestion = () => {
if (i >= questions.length) {
  return;
}
channel.send(questions[i].question);

// Create a collector to get the answers from users
const filter = m => !m.author.bot;
const collector = channel.createMessageCollector(filter, { time: 10000 });

collector.on('collect', message => {
  if (message.content === questions[i].answer) {
    channel.send(`${message.author} a trouvé la bonne réponse!`);
    collector.stop();
  }
});

collector.on('end', collected => {
  i++;
  if (i >= questions.length) {
    channel.send('Toutes les questions ont été posées!');
    return;
  }
  if (!collected.size) {
    channel.send(`Aucune réponse n'a été trouvée pour la question "${questions[i].question}"`);
  }
  handleQuestion();
});
};

handleQuestion();
}
});

client.login('Token_discord');

问题根源 #

1. 在collector.end回调中，先执行了i++，导致发送超时提示时引用的是下一题的问题，而非当前超时的题目，逻辑混乱
2. 用户无法得到明确的超时反馈，误以为机器人未响应

修复代码 #

client.on('messageCreate', async message => {
//...
let i = 0;
const channel = message.channel;

const handleQuestion = () => {
  if (i >= questions.length) {
    return;
  }
  // 保存当前问题，避免索引变动导致引用错误
  const currentQuestion = questions[i];
  channel.send(currentQuestion.question);

  const filter = m => !m.author.bot;
  const collector = channel.createMessageCollector(filter, { time: 10000 });

  collector.on('collect', msg => {
    // 忽略大小写，提升用户体验
    if (msg.content.toLowerCase() === currentQuestion.answer.toLowerCase()) {
      channel.send(`${msg.author} 答对了！`);
      collector.stop();
    }
  });

  collector.on('end', collected => {
    // 先处理当前题的超时反馈
    if (collected.size === 0) {
      channel.send(`无人在10秒内答对问题："${currentQuestion.question}"`);
    }
    // 再递增索引
    i++;
    if (i >= questions.length) {
      channel.send('所有问题已完成！');
      return;
    }
    // 进入下一题
    handleQuestion();
  });
};

handleQuestion();
});

client.login('Token_discord');

关键修改点 #

• 用currentQuestion变量保存当前题目，避免因i递增导致的引用错误
• 调整end回调逻辑顺序：先发送超时提示，再递增索引，最后触发下一题
• 新增大小写忽略判断，降低用户答题门槛
• 明确i和channel的作用域，避免未定义错误

内容的提问来源于stack exchange，提问作者oxem