val-bot/modules/_8ball.js

A bot that does things.

/**
 * a magic 8ball that tells the future 100% accurately.  It's not val's fault
 * we cant properly understand it's context
 *
 * base on https://xkcd.com/1525/
 */
const emojica = require('../lists/emojica');
const questionWords = require('../lists/questionWords');
const Module = require('./Module.js');

class _8ball extends Module {
  /**
   * ## checkQuestions
   *
   * determines whether or not the delivered question is actually one
   *
   * @param {String} text original text
   *
   * @return {Boolean} question or not
   */
  checkQuestions(text) {
    let count = 0;
    const none = 0 - questionWords.length;
    const textSplit = text.split(' ');

    questionWords.forEach(word => {
      count += textSplit.indexOf(word);
    });

    return count !== none;
  }

  /**
   * ## getPrediction
   *
   * double check that the text is a question, then tells the future
   * through a very scientific and magical process
   *
   * @param {String} from originating channel
   * @param {String} to originating user
   * @param {Sring} text original text minus command
   *
   * @return {String} visions of the future
   */
  getPrediction(from, to, text) {
    if (
      !this.checkQuestions(text.toLowerCase()) ||
      text === '' ||
      text.indexOf('?') === -1
    ) {
      return `sorry, ${to} that didn't look like a question.`;
    }

    let emojiCount = Math.floor(Math.random() * 100);

    if (emojiCount < 39 || emojiCount > 93) {
      emojiCount = 1;
    } else if (emojiCount > 98 || emojiCount < 3) {
      emojiCount = 3;
    } else {
      emojiCount = 2;
    }

    let res = '';
    const emojiLength = emojica.length;

    for (let i = 0; i < emojiCount; i++) {
      res += emojica[Math.floor(Math.random() * emojiLength)];
    }

    return res;
  }

  /**
   * ## responses
   *
   * @return {Object} responses
   */
  responses() {
    return {
      commands: {
        '8ball': {
          f: this.getPrediction,
          desc: `let ${this._bot.name} predict the future`,
          syntax: [`${this.userConfig.trigger}8ball <question>?`],
        },
      },
    };
  }
}

module.exports = _8ball;