Include a revamped institutions helper modified for rails 3
user
```ruby
# Rails helper module for institutions
module Nyulibraries
  module Assets
    module InstitutionsHelper
      # Determine current primary institution based on:
      #   0. institutions are not being used (returns nil)
      #   1. institution query string parameter in URL
      #   2. institution associated with the client IP
      #   3. primary institution for the current user
      #   4. first default institution
      def current_institution
        @current_institution ||= case
        when (institution_param.present? && institutions[institution_param])
          institutions[institution_param]
        when institution_from_ip.present?
          institution_from_ip
        when (@current_user && current_user.has_attribute?(:institution_code) && current_user.institution_code && !current_user.institution_code.empty?)
          institutions[current_user.institution_code.to_sym]
        else
          Institutions.defaults.first
        end
      end
      alias current_primary_institution current_institution
      alias current_institute current_institution

      # Override Rails #url_for to add institution
      def url_for(options={})
        if institution_param.present? and options.is_a? Hash
          options[:institute] ||= institution_param
        end
        super options
      end

      # Grab the first institution that matches the client IP
      def institution_from_ip
        unless request.nil?
          @institution_from_ip ||= Institutions.with_ip(request.remote_ip).first
        end
      end
      private :institution_from_ip

      # All institutions
      def institutions
        @institutions ||= Institutions.institutions
      end
      private :institutions

      # The institution param as a Symbol
      def institution_param
        params['institution'].upcase.to_sym if params['institution'].present?
      end
      private :institution_param
    end
  end
end
```
assistant