discourse/lib/onebox/engine/pastebin_onebox.rb

# frozen_string_literal: true

module Onebox
  module Engine
    class PastebinOnebox
      include Engine
      include LayoutSupport

      MAX_LINES = 10

      matches_regexp(/^http?:\/\/pastebin\.com/)

      private

      def data
        @data ||= {
          title: 'pastebin.com',
          link: link,
          content: content,
          truncated?: truncated?
        }
      end

      def content
        lines.take(MAX_LINES).join("\n")
      end

      def truncated?
        lines.size > MAX_LINES
      end

      def lines
        return @lines if defined?(@lines)
        response = Onebox::Helpers.fetch_response("http://pastebin.com/raw/#{paste_key}", redirect_limit: 1) rescue ""
        @lines = response.split("\n")
      end

      def paste_key
        regex = case uri
                when /\/raw\//
                  /\/raw\/([^\/]+)/
                when /\/download\//
                  /\/download\/([^\/]+)/
                when /\/embed\//
                  /\/embed\/([^\/]+)/
        else
                  /\/([^\/]+)/
        end

        match = uri.path.match(regex)
        match[1] if match && match[1]
      end
    end
  end
end