オンライン質問応答におけるリアルタイムの対話をサポートするシステムを設計する方法

{
  _id: ObjectId,
  question: String,
  options: [String],
  answer: String
}

{
  _id: ObjectId,
  userId: String,
  questionId: ObjectId,
  answer: String,
  correct: Boolean
}

import React, { useState, useEffect } from 'react';

const Quiz = () => {
  const [questions, setQuestions] = useState([]);
  const [answered, setAnswered] = useState(false);
  const [answer, setAnswer] = useState('');

  useEffect(() => {
    fetch('/api/questions')
      .then(response => response.json())
      .then(data => setQuestions(data));
  }, []);

  const handleSubmit = () => {
    fetch('/api/records', {
      method: 'POST',
      body: JSON.stringify({ answer }),
      headers: { 'Content-Type': 'application/json' }
    })
      .then(response => response.json())
      .then(data => {
        setAnswered(true);
        // 更新其他用户的答题情况
      });
  };

  return (
    <div>
      <h1>在线答题</h1>
      {questions.map(question => (
        <div key={question._id}>
          <h3>{question.question}</h3>
          {question.options.map(option => (
            <div key={option}>
              <input
                type="radio"
                id={option}
                name="answer"
                value={option}
                onChange={e => setAnswer(e.target.value)}
                disabled={answered}
              />
              <label htmlFor={option}>{option}</label>
            </div>
          ))}
        </div>
      ))}
      {!answered && (
        <button onClick={handleSubmit}>提交答案</button>
      )}
    </div>
  );
};

export default Quiz;