WIP ROM csv adapter

csv_adapter.rb

module ROM
  module CSV

    class Adapter < ROM::Adapter

      def self.schemes
        [:csv]
      end

      attr_reader :path, :basename

      # CSVs are basically one relation per connection. Is there a way
      # we could do multiples? Perhaps multiple repositories?
      #
      # What about CSV options, like header converters, sep, etc?
      def initialize(uri)
        super
        @path = uri.path
        # capture the basename to use when finding "relations"
        @basename = File.basename(path, File.extname(path))
        # Uses ::table which uses the following options:
        #  headers: true
        #  converters: numeric
        #  header_converters: :symbol
        @connection = ::CSV.table(path)
      end

      def dataset?(name)
        basename == name.to_s
      end

      def [](name)
        connection if dataset?(name)
      end

      ROM::Adapter.register(self)
    end

  end
end