Question.ts updated

Question.ts

import shuffle from "lodash.shuffle"

export const QuestionModel = types
  .model("Question")
  .props({
    id: types.identifier,
    category: types.maybe(types.string),
    type: types.enumeration(["multiple", "boolean"]),
    difficulty: types.enumeration(["easy", "medium", "hard"]),
    question: types.maybe(types.string),
    correctAnswer: types.maybe(types.string),
    incorrectAnswers: types.optional(types.array(types.string), []),
    guess: types.maybe(types.string),
  })
  .actions(withSetPropAction)
  .views((self) => ({
    get allAnswers() {
      return shuffle([
        ...self.incorrectAnswers,
        ...(self.correctAnswer ? [self.correctAnswer] : []),
      ])
    },
    get isCorrect() {
      return self.guess === self.correctAnswer
    },
  }))
  .actions((self) => ({
    setGuess(guess: string) {
      self.setProp("guess", guess)
    },
  }))