class DisplayAd < ApplicationRecord
  belongs_to :organization
  validates :organization_id, presence: true
  validates :placement_area, presence: true,
                             inclusion: { in: %w(sidebar) }
  validates :body_markdown, presence: true
  before_save :process_markdown

  private

  def process_markdown
    renderer = Redcarpet::Render::HTMLRouge.new(hard_wrap: true, filter_html: false)
    markdown = Redcarpet::Markdown.new(renderer)
    initial_html = markdown.render(body_markdown)
    stripped_html = ActionController::Base.helpers.sanitize initial_html.html_safe,
      tags: %w(a em i b u br img h1 h2 h3 h4 div),
      attributes: %w(href target src height width style)
    html = stripped_html.gsub("\n", "")
    self.processed_html = MarkdownParser.new(html).prefix_all_images(html, 350)
  end
end