70 lines
1.9 KiB
JavaScript
70 lines
1.9 KiB
JavaScript
import Message from './Message';
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import Keyboard from './Keyboard';
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/**
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* Question class, extends Message
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* Sends a message, shows a keyboard with the answers provided, and validates
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* the answer
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*/
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export default class Question extends Message {
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/**
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* Create a new question
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* @param {object} options Options, same as Message, plus `answers` which
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* is a keyboard layout, see Keyboard#keys
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*/
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constructor(options = {}) {
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super(options);
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let kb = new Keyboard().force().oneTime().selective();
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this.keyboard(kb);
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this.answers(options.answers);
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}
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/**
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* Sets answers of the question. This is passed to Keyboard#keys, and then
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* used to validate the answer given
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* @param {array} answers Array of arrays of strings, same as Keyboard#keys
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* @return {object} returns the question object
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*/
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answers(answers) {
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this._answers = answers;
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this._keyboard.keys(answers);
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return this;
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}
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/**
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* Sends the question (same as Message#send), and validates the answer given
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* if the answer is one of the defined answers, resolves, else rejects
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* You should not manually use this method unless you're extending this class
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* You should instead use bot.send(question);
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* @param {object} bot
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* @return {promise} A promise which is resolved in case of valid answer, and
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* rejected in case of invalid answer
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*/
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send(bot) {
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const answers = this._answers;
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return super.send(bot).then(message => {
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let answer;
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answers.forEach(function find(a) {
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if (Array.isArray(a)) {
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a.forEach(find);
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}
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if (a === message.text) {
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answer = a;
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}
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});
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if (answer) {
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this.emit('question:answer', answer, message);
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return message;
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} else {
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this.emit('question:invalid', message);
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throw message;
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}
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});
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}
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}
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