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absinthe lib absinthe phase schema inline_functions.ex
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lib/absinthe/phase/schema/inline_functions.ex 

defmodule Absinthe.Phase.Schema.InlineFunctions do

  @moduledoc false



  use Absinthe.Phase

  alias Absinthe.Blueprint

  alias Absinthe.Blueprint.Schema

  alias Absinthe.Type



  def run(blueprint, opts) do

    blueprint = Blueprint.prewalk(blueprint, &inline_functions(&1, blueprint.schema, opts))



    {:ok, blueprint}

  end



  def inline_functions(%Schema.SchemaDefinition{} = schema_def, schema, opts) do

    schema_def = %{

      schema_def

      | type_artifacts: Enum.map(schema_def.type_artifacts, &inline_functions(&1, schema, opts)),

        directive_artifacts:

          Enum.map(schema_def.directive_artifacts, &inline_functions(&1, schema, opts))

    }



    {:halt, schema_def}

  end



  def inline_functions(%type{identifier: _} = node, schema, opts) do

    type

    |> Schema.functions()

    # middleware gets handled specially

    |> Enum.reject(&(&1 in [:middleware]))

    |> Enum.reduce(node, &inline_function(&1, &2, opts))

    |> inline_middleware(schema, opts)

  end



  def inline_functions(node, _, _) do

    node

  end



  defp inline_function(attr, node, opts) do

    function = Type.function(node, attr)



    if Absinthe.Utils.escapable?(function) || opts[:inline_always] do

      %{node | attr => function}

    else

      node

    end

  end



  def inline_middleware(%type_name{} = type, schema, opts)

      when type_name in [Type.Object, Type.Union, Type.Interface] do

    Map.update!(type, :fields, fn fields ->

      fields =

        Enum.map(fields, fn {field_ident, field} ->

          {field_ident, inline_functions(field, schema, opts)}

        end)



      Map.new(fields, fn

        {field_ident, %{middleware: middleware} = field} ->

          expanded_middleware = Absinthe.Middleware.expand(schema, middleware, field, type)



          if Absinthe.Utils.escapable?(expanded_middleware) || opts[:inline_always] do

            {field_ident, %{field | middleware: expanded_middleware}}

          else

            middleware_shim = {

              {Absinthe.Middleware, :shim},

              {type.identifier, field.identifier, middleware}

            }



            {field_ident, %{field | middleware: [middleware_shim]}}

          end



        {field_ident, field} ->

          middleware = Absinthe.Middleware.expand(schema, field.middleware, field, type)



          {field_ident, %{field | middleware: middleware}}

      end)

    end)

  end



  def inline_middleware(type, _, _) do

    type

  end

end