bmelnychuk

class GetNextQuestion {
    questionRepository: QuestionRepository;
    nextQuestionPolicy: NextQuestionPolicy;

    async invoke(categoryId: string): Promise<Question> {
        const availableQuestions = await this.questionRepository.getAvailableQuestions(
            categoryId
        );
        return this.nextQuestionPolicy.getNextQuestion(availableQuestions);
    }

bmelnychuk

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

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