Question answering API.js

const questionGenerationPolicy = new RandomNextQuestionPolicy();
const answerValidationPolicy = new TextEqualityAnswerValidationPolicy();
const questionRepository = new QuestionStoreRepository();

const getNextQuestionUseCase = new GetNextQuestion(
    questionRepository, questionGenerationPolicy
);
const answerQuestionUseCase = new AnswerQuestion(
    questionRepository, answerValidationPolicy
);

export async function getNextQuestion(categoryId: string): Promise<{ id: string, question: string, answer: string}> {
    const question = await getNextQuestionUseCase.invoke(categoryId);
    return {
        id: question.id,
        question: question.body,
        answer: question.answer
    };
}

export async function answerQuestion(questionId: string, userAnswer: string): Promise<{ correctAnswer: string, isValid: boolean}> {
    const answerResult = await answerQuestionUseCase.invoke(questionId, userAnswer);
    return {
        correctAnswer: answerResult.correctAnswer,
        isValid: answerResult.isValid
    };
}