Module: MjmlPremailer::TransformHtml

Extended by:
TransformHtml
Included in:
TransformHtml
Defined in:
lib/mjml-premailer/transform_html.rb

Instance Method Summary collapse

Instance Method Details

#transform_html(html_body) ⇒ Object 



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# File 'lib/mjml-premailer/transform_html.rb', line 7

def transform_html(html_body)
  bin = MjmlPremailer.config[:bin]

  beautify = MjmlPremailer.config[:beautify]
  beautify_option = "--config.beautify #{beautify}"

  minify = MjmlPremailer.config[:minify]
  minify_option = "--config.minify #{minify}"

  keep_comments = MjmlPremailer.config[:keep_comments]
  keep_comments_option = "--config.keepComments #{keep_comments}"

  validation_level = MjmlPremailer.config[:validation_level]
  validation_level_option = "--config.validationLevel #{validation_level}"

  read_input_to_stdin_option = '-i'

  # stolen from https://github.com/kolybasov/mjml-ruby/blob/master/lib/mjml/parser.rb
  should_get_outpout_from_file = html_body.size > 20_000

  if should_get_outpout_from_file
    temp_file = Tempfile.new

    write_output_to_tempfile_option = "-o #{temp_file.path}"

    cmd = [
      bin,
      read_input_to_stdin_option,
      write_output_to_tempfile_option,
      beautify_option,
      minify_option,
      keep_comments_option,
      validation_level_option
    ].join(' ')

    _out, err, _sts = Open3.capture3(cmd, stdin_data: html_body)

    temp_file.rewind
    temp_file.unlink

    err_ = err.strip.presence

    [temp_file.read, err_]
  else
    write_output_to_stdout_option = '-s'

    cmd = [
      bin,
      read_input_to_stdin_option,
      write_output_to_stdout_option,
      beautify_option,
      minify_option,
      keep_comments_option,
      validation_level_option
    ].join(' ')

    MjmlPremailer::Debug.debug "> MjmlPremailer command: #{cmd}"

    out, err, _sts = Open3.capture3(cmd, stdin_data: html_body)

    err_ = err.strip.presence

    [out, err_]
  end
end