# File app/controllers/conferences_adm_controller.rb, line 122
  def mail_attendees
    @conferences = Conference.upcoming + Conference.past
    return true unless request.post?

    if params[:title].nil? or params[:title].empty? or 
        params[:body].nil? or params[:body].empty?
      flash[:error] << _('You must specify both email title and body')
      return false
    end

    unless conf = Conference.find_by_id(params[:dest_conf_id])
      flash[:error] << _('Invalid conference specified')
      return false
    end

    rcpts = conf.people_for_mailing
    rcpts.each do |rcpt|
      begin
        Notification.deliver_conf_attendees_mail(@user, rcpt, conf,
                                       params[:title], params[:body])
      rescue Notification::InvalidEmail
        flash[:warning] << _('User %s (ID: %s) is registered with an ' +
                              'invalid email address (%s). Skipping...') %
          [rcpt.name, rcpt.id, rcpt.email]
      end
    end

    if rcpts.empty?
      flash[:notice] << _('No registered attendees for %s have chosen to '+
                          'receive mails - Not sending.') % conf.name
    else
      flash[:notice] << _('The %d requested mails for "%s" attendees have ' +
                          'been sent.') % [rcpts.size, conf.name]
    end
    redirect_to :action => 'list'
  end