Pattern matching on many parameters

message

defmodule Message do
  defstruct to: nil, subject: nil, text: nil, html: nil, from: nil, bcc: nil

  # this is the minimum needed to send an email
  def new(%{to: to, subject: subject, text: text, from: from})  do
    {:ok, %Message{to: to, subject: subject, text: text, from: from} }
  end
  
  def new(%{to: to, subject: subject, html: html, from: from})  do
    {:ok, %Message{to: to, subject: subject, html: html, from: from} }
  end
end