'use strict';
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const SelectPrompt = require('./select');
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class Quiz extends SelectPrompt {
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constructor(options) {
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super(options);
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if (typeof this.options.correctChoice !== 'number' || this.options.correctChoice < 0) {
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throw new Error('Please specify the index of the correct answer from the list of choices');
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}
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}
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async toChoices(value, parent) {
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let choices = await super.toChoices(value, parent);
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if (choices.length < 2) {
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throw new Error('Please give at least two choices to the user');
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}
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if (this.options.correctChoice > choices.length) {
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throw new Error('Please specify the index of the correct answer from the list of choices');
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}
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return choices;
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}
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check(state) {
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return state.index === this.options.correctChoice;
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}
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async result(selected) {
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return {
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selectedAnswer: selected,
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correctAnswer: this.options.choices[this.options.correctChoice].value,
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correct: await this.check(this.state)
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};
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}
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}
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module.exports = Quiz;
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