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absinthe_relay

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Relay framework support for Absinthe

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absinthe_relay lib absinthe relay schema phase.ex
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lib/absinthe/relay/schema/phase.ex 

defmodule Absinthe.Relay.Schema.Phase do

  use Absinthe.Phase



  alias Absinthe.Blueprint

  alias Absinthe.Blueprint.Schema



  def run(blueprint, _) do

    {blueprint, _acc} = Blueprint.postwalk(blueprint, [], &collect_types/2)



    {:ok, blueprint}

  end



  defp collect_types(%Schema.SchemaDefinition{} = schema, new_types) do

    new_types =

      Enum.reject(new_types, fn new_type ->

        Enum.any?(schema.type_definitions, fn t -> t.identifier == new_type.identifier end)

      end)



    schema =

      schema

      |> Map.update!(:type_definitions, &(new_types ++ &1))

      |> Blueprint.prewalk(&fill_nodes/1)



    {schema, []}

  end



  defp collect_types(%{__private__: private} = node, types) do

    attrs = private[:absinthe_relay] || []



    types =

      Enum.reduce(attrs, types, fn

        {kind, {:fill, style}}, types ->

          List.wrap(style.additional_types(kind, node)) ++ types



        _, types ->

          types

      end)



    {node, types}

  end



  defp collect_types(node, acc) do

    {node, acc}

  end



  defp fill_nodes(%{__private__: private} = node) do

    Enum.reduce(private[:absinthe_relay] || [], node, fn

      {type, {:fill, style}}, node -> style.fillout(type, node)

      _, node -> node

    end)

  end



  defp fill_nodes(node) do

    node

  end

end