module ActionMailer::MailHelper

def attachments

Access the message attachments list. 
def attachments
  mailer.attachments
end

def block_format(text)

# => " This is the paragraph.\n\n * item1\n * item2\n"
block_format text

TEXT
* item1 * item2

the paragraph.
This is
text = <<-TEXT

wrapped at 72 columns:
Take the text and format it, indented two spaces for each line, and 
def block_format(text)
  formatted = text.split(/\n\r?\n/).collect { |paragraph|
    format_paragraph(paragraph)
  }.join("\n\n")
  # Make list points stand on their own line
  output = +""
  splits = formatted.split(/(\*+|\#+)/)
  while line = splits.shift
    if line.start_with?("*", "#") && splits.first&.start_with?(" ")
      output.chomp!(" ") while output.end_with?(" ")
      output << "  #{line} #{splits.shift.strip}\n"
    else
      output << line
    end
  end
  output
end

def format_paragraph(text, len = 72, indent = 2)

# => " Here is a sample text with\n more than 40 characters"
format_paragraph(my_text, 25, 4)

my_text = 'Here is a sample text with more than 40 characters'

+indent+ equal two spaces.
By default column length +len+ equals 72 characters and indent
Returns +text+ wrapped at +len+ columns and indented +indent+ spaces. 
def format_paragraph(text, len = 72, indent = 2)
  sentences = [[]]
  text.split.each do |word|
    if sentences.first.present? && (sentences.last + [word]).join(" ").length > len
      sentences << [word]
    else
      sentences.last << word
    end
  end
  indentation = " " * indent
  sentences.map! { |sentence|
    "#{indentation}#{sentence.join(' ')}"
  }.join "\n"
end

def mailer

Access the mailer instance. 
def mailer
  @_controller
end

def message

Access the message instance. 
def message
  @_message
end