module Write
  module ApplicationHelper
    def write_admin?
      login_user && Write.admin?(login_user.github)
    end

    def login_user
      defined?(current_user) && current_user
    end

    def timestamp_display post
      words = time_ago_in_words(post.created_at) + " ago"
      if post.updated?
        words << " (Updated #{time_ago_in_words(post.updated_at)} ago)"
      end
      words
    end

    def head_links
      content_for :head, auto_discovery_link_tag(:atom, atom_feed_url, :title => Write.full_title) +
        stylesheet_link_tag("write/application", :media => "all")
    end

    def atom_feed_url
      Write.feed_url || feed_url
    end

    def post_snippet post
      truncate_html(Write::MD.render(post.content), :length => 256).html_safe
    end
  end
end