gistfile1.txt

class Post
  include ActiveModel::Model

  YAML_FRONT_MATTER_REGEXP =
    %r{\A(---\s*\n.*?\n?)^((---|\.\.\.)\s*$\n?)}m.freeze

  attr_accessor :title, :date, :html, :filename

  def slug
    File.basename(filename, ".md").remove(filename[0, 11])
  end

  def display_date
    date.strftime("%b %d %Y")
  end

  class << self
    def find(filepath)
      content = File.read(filepath)

      if content =~ YAML_FRONT_MATTER_REGEXP
        frontmatter = YAML.safe_load(Regexp.last_match.to_s)
        html = Kramdown::Document.new($POSTMATCH, input: "GFM").to_html

        return Post.new(
          title: frontmatter["title"],
          date: DateTime.parse(frontmatter["date"]),
          html: html,
          filename: File.basename(filepath)
        )
      end

      unknown
    end

    def unknown
      Post.new(title: "Unknown", date: Time.now, html: "Not Found")
    end
  end
end