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