pulibrary / pomegranate / 221

class SearchBuilder

  class JoinChildrenQuery

    attr_reader :parent_query

    def initialize(parent_query)

      @parent_query = parent_query

    end

    def to_s

      q = queries.map do |query|

        "(#{dismax_join(send(query))})"

      end.join(" OR ")

      "{!lucene}#{q}"

    end

    private

      def queries

        [

          :main_query,

          :query_children

        ]

      end

      def dismax_join(query)

        "#{query}{!dismax}#{parent_query}"

      end

      def main_query

        ""

      end

      def query_children

        "{!join from=collection_id_ssim to=id}"

      end

  end

end