module DeviseCasAuthenticatable
  module SingleSignOut
    module Strategies
      class RailsCache < Base
        def store_session_id_for_index(session_index, session_id)
          logger.debug("Storing #{session_id} for index #{session_index}")
          Rails.cache.write(cache_key(session_index), session_id)
        end

        def find_session_id_by_index(session_index)
          sid = Rails.cache.read(cache_key(session_index))
          logger.debug("Found session id #{sid.inspect} for index #{session_index.inspect}")
          sid
        end
        
        def delete_session_index(session_index)
          logger.info("Deleting index #{session_index}")
          Rails.cache.delete(cache_key(session_index))
        end
        
        private
        
        def cache_key(session_index)
          "devise_cas_authenticatable:#{session_index}"
        end
      end
    end
  end
end

::DeviseCasAuthenticatable::SingleSignOut::Strategies.add( :rails_cache, DeviseCasAuthenticatable::SingleSignOut::Strategies::RailsCache )