gistfile1.txt

# CONTROLLER

    if $INVITE_ONLY and (params[:invite_key] != @user.invite_key) then
      flash.now[:error] = t 'account.invalid_invite'
      render :action => :new
    else
      if @user.save
        flash[:notice] = t 'account.created'
        redirect_to account_path
      else
        render :action => :new
      end
    end


# MODEL

def invite_key
  Digest::SHA1.hexdigest(self.email.downcase + 'cool secret junk, put lots of random chars here')
end