Link meta presenter

link_meta_presenter.rb

class LinkMetaPresenter
  def initialize(article) # Define article as the object passed to LinkMetaPresenter(@article) in our article_controller so we can access it here
    @article = article
  end

  attr_reader :article # Provide read access to the 'article' variable within this file
  
  delegate :twitter_card, to: :article # Define 'twitter_card' as 'article.twitter_card'

  def card_type
    twitter_card&.card || 'summary' # Use the card type on the twitter card (if twitter_card exists - safe navigator returns nil if it doesn't), otherwise use 'summary'
  end

  def title
    twitter_card&.title || article.html_title || article.title || I18n.t('happy_bear_software.title') # Use twitter card title, or article html title, or article title, or last resort, the site title
  end

  def description
    twitter_card&.description || article.description || I18n.t('happy_bear_software.description')
  end

  def image_url
    twitter_card&.image_url || 'https://images.ctfassets.net/jdiiwrjwwj2y/47bceGNtJuAAOYQc6gMI2e/2437282b0d09fdacb515e222d7db21f5/Developers-guide-human-networking-Twitter.png'
  end

  def creator
    twitter_card&.creator || authors_twitter_handle || '@happybearsoft' # Wrap some messy code in authors_twitter_handle, a private method, so it's easier to read 
  end

  def site
    twitter_card&.site || '@happybearsoft'
  end

  def og_type
    'article' # In whatever case, og_type will always be article
  end

  def domain
    'happybearsoftware.com'
  end

  private

  def authors_twitter_handle
    '@' + article.author.twitter_url.gsub('https://twitter.com/', '') if article.author&.twitter_url.present?
  end
end