thiagoa

Imageable = Module.new

def Imageable.included(model_class)
  model_class.has_many :images
end

Imageable.module_eval do
  def main_image
    images.find { |image| image.kind == 'main_image' }
  end

thiagoa

class Project < ApplicationRecord
  include Imageable
end

project = Project.new
project.main_image #=> <Image kind="main_image" imageable_type="Project">

thiagoa

module Imageable
  # When including this module, this hook is called
  # by Ruby with the included module/class
  def self.included(model_class)
    model_class.has_many :images
  end

  def main_image
    images.find { |image| image.kind == 'main_image' }
  end

thiagoa

export default function wrapSentencesInTags(text) {
  return text
    .split('\n')
    .map(chunk => chunk.trim())
    .map(chunk => (chunk !== '') ? `<p>${chunk}</p>` : '')
    .join('');
}

thiagoa

import { expect } from 'chai';
import renderOneTweet from 'app/twitter/renderOneTweet';
import createFixture from '../../support/createFixture';

describe('renderOneTweet', () => {
  let fixture;

  beforeEach(() => { fixture = createFixture({ html: '<div id="fixture"></div>' }); });
  afterEach(() => { fixture.remove(); });

thiagoa

import parseOneTweet from 'app/twitter/parseOneTweet'; // Add this line
import renderOneTweet from 'app/twitter/renderOneTweet';
import fetchTimeline from 'app/twitter/fetchTimeline';

export default function mountComponent(opts) {
  const containerNode = opts.containerNode;

  function renderTweets(response) {
    const html = response
      .tweets

thiagoa

import { pipe } from 'lodash/fp';
import wrapSentencesInTags from 'app/twitter/wrapSentencesInTags';
import parseLineBreaks from 'app/twitter/parseLineBreaks';
import parseTweetMentions from 'app/twitter/parseTweetMentions';

const parseText = pipe(parseTweetMentions, wrapSentencesInTags, parseLineBreaks);

export default function parseOneTweet(tweet) {
  return Object.assign({}, tweet, { text: parseText(tweet) });
}

thiagoa

// app/assets/javascripts/app/twitter/parseOneTweet.js
export default function parseOneTweet(tweet) {
  return tweet;
}

thiagoa

import { expect } from 'chai';
import parseOneTweet from 'app/twitter/parseOneTweet';

describe('parseOneTweet', () => {
  it('returns a tweet object with parsed text', () => {
    const tweet = {
      created_at: '2016-01-01T00:00:00.000-03:00',
      mentions: ['dude'],
      text: '@dude 1 shot of Tequila\n\n2 shots of Tequila...\n3 shots of Tequila...',
    };

thiagoa

function replaceMention(text, mention) {
  const regexp = new RegExp(`^@${mention}\\b|(\\s)@${mention}\\b`, 'g');
  const template = `$1<a href="#" data-js-mention>@${mention}</a>`;

  return text.replace(regexp, template);
}

export default function parseTweetMentions({ text, mentions }) {
  return mentions.reduce(replaceMention, text);
}