multiline_truncate

multiline_truncate.rb

def multiline_truncate(string, width, max_lines)
  lines = word_wrap(string, line_width: width).split("\n")

  # string does not wrap past maximum number of lines
  return string unless lines[max_lines].present?

  # join the last two lines and truncate them
  last_line = "#{lines[max_lines - 1]} #{lines[max_lines]}"
  lines[max_lines - 1] = truncate(last_line, length: width)

  # return lines separated by break tags
  lines.take(max_lines).join('<br>').html_safe
end