37 lines
1 KiB
JavaScript
37 lines
1 KiB
JavaScript
'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;
|