Noosfero/noosfero

require_dependency "article"

class Article
  has_many :paragraph_comments, -> {
    order("created_at ASC")
      .where("paragraph_uuid IS NOT NULL")
  }, class_name: "Comment", foreign_key: "source_id", dependent: :destroy

  before_save :comment_paragraph_plugin_parse_html

  def comment_paragraph_plugin_enabled?
    environment.plugin_enabled?(CommentParagraphPlugin) && self.kind_of?(CommentParagraphPlugin::Discussion)
  end

  def cache_key_with_comment_paragraph(params = {}, user = nil, language = "en")
    cache_key_without_comment_paragraph(params, user, language) + (user.present? ? "-logged_in-" : "-not_logged-")
  end

  alias_method :cache_key_without_comment_paragraph, :cache_key
  alias_method :cache_key, :cache_key_with_comment_paragraph

  def comment_paragraph_plugin_paragraph_content(paragraph_uuid)
    doc = Nokogiri::HTML(body)
    paragraph = doc.css("[data-macro-paragraph_uuid='#{paragraph_uuid}']").first
    paragraph.present? ? paragraph.text : nil
  end

  protected

    def comment_paragraph_plugin_parse_html
      return unless comment_paragraph_plugin_enabled?

      if body && body_changed?
        updated = body_changed? ? body_change[1] : body
        doc = Nokogiri::HTML(updated)
        (doc.css("li") + doc.css("body > div, body > span, body > p")).each do |paragraph|
          next if (paragraph["class"] == "is-not-commentable") || paragraph.css("span[id^='data-macro-uuid']").present? || paragraph.content.blank?

          commentable = paragraph.at('span[data-macro-paragraph_uuid^=""]')
          id = commentable.nil? ? nil : commentable["data-macro-paragraph_uuid"]
          commentable ||= Nokogiri::XML::Node.new("span", doc)
          commentable["class"] = "macro article_comments paragraph_comment #{paragraph['class']}"
          commentable["data-macro"] = "comment_paragraph_plugin/allow_comment"
          commentable.remove_attribute("data-macro-paragraph_uuid")
          commentable["id"] = id ? "data-macro-uuid-" + id : "data-macro-uuid-" + SecureRandom.uuid
          commentable.inner_html = paragraph.inner_text
          paragraph.inner_html = commentable
        end
        doc_body =  doc.at("body")
        self.body = doc_body.inner_html if doc_body
      end
    end

    def comment_paragraph_plugin_settings
      @comment_paragraph_plugin_settings ||= Noosfero::Plugin::Settings.new(environment, CommentParagraphPlugin)
    end
end