module Eddy
  module Loop
    # Data form a single loop iteration.
    class Repeat

      # An array of Segments and/or other Loops.
      # This is used as a template to populate `content`.
      # @return [Array<Eddy::Segment, Eddy::Loop::Base>]
      attr_reader :components
      # @return [Eddy::Data::Store] Data passed down from a Transaction Set.
      attr_reader :store

      # All of a Loop's elements need to be declared in its constructor.
      #
      # @param store [Eddy::Data::Store]
      # @param components [Array<Eddy::Loop, Eddy::Segment>]
      # @return [void]
      def initialize(store, *components)
        @store = store
        components.flatten!
        @components = components || []
      end

      # Return all contained Segments in a single, flattened array.
      #
      # @return [Array<Eddy::Segment>]
      def all_contents()
        contents = self.content.flatten.map do |c|
          if c.is_a?(Eddy::Loop::Base)
            c.all_contents()
          elsif c.is_a?(Eddy::Segment)
            c
          else
            raise Eddy::Errors::RenderError
          end
        end
        return contents.flatten
      end

    end
  end
end