I have several controllers that take an instance of different classes each (Email, Call, Letter, etc) and they all have to go through this same substitution:

@email.message.gsub!("{FirstName}", @contact.first_name)
@email.message.gsub!("{Company}", @contact.company_name) 
@email.message.gsub!("{Colleagues}", @colleagues.to_sentence)
@email.message.gsub!("{NextWeek}", (Date.today + 7.days).strftime("%A, %B %d"))
@email.message.gsub!("{ContactTitle}", @contact.title )

So, for example, @call.message for Call, @letter.message for Letter, etcetera.

This isn't very dry. I'd like to have something like

def messagesub(asset)
   @asset.message.gsub....

end

or something like that so I can just use messagesub method in each controller.