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absinthe lib absinthe phase document arguments parse.ex
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lib/absinthe/phase/document/arguments/parse.ex 

defmodule Absinthe.Phase.Document.Arguments.Parse do

  @moduledoc false



  # Parses Leaf Node inputs



  alias Absinthe.Blueprint.Input

  alias Absinthe.{Blueprint, Type}

  use Absinthe.Phase



  def run(input, options \\ []) do

    result = Blueprint.prewalk(input, &handle_node(&1, options[:context] || %{}))

    {:ok, result}

  end



  defp handle_node(%{schema_node: nil} = node, _context) do

    {:halt, node}

  end



  defp handle_node(%{normalized: nil} = node, _context) do

    node

  end



  defp handle_node(%Input.Value{normalized: normalized} = node, context) do

    case build_value(normalized, node.schema_node, context) do

      {:ok, value} ->

        %{node | data: value}



      :not_leaf_node ->

        node



      {:error, flag} ->

        %{node | normalized: normalized |> flag_invalid(flag)}

    end

  end



  defp handle_node(node, _context), do: node



  defp build_value(%Input.Null{}, %Type.NonNull{}, _) do

    {:error, :non_null}

  end



  defp build_value(normalized, %Type.Scalar{} = schema_node, context) do

    case Type.Scalar.parse(schema_node, normalized, context) do

      :error ->

        {:error, :bad_parse}



      {:ok, val} ->

        {:ok, val}

    end

  end



  defp build_value(%Input.Null{}, %Type.Enum{}, _) do

    {:ok, nil}

  end



  defp build_value(normalized, %Type.Enum{} = schema_node, _) do

    case Type.Enum.parse(schema_node, normalized) do

      {:ok, %{value: value}} ->

        {:ok, value}



      :error ->

        {:error, :bad_parse}

    end

  end



  defp build_value(normalized, %Type.NonNull{of_type: inner_type}, context) do

    build_value(normalized, inner_type, context)

  end



  defp build_value(_, _, _) do

    :not_leaf_node

  end

end