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lib/absinthe/phase/document/result.ex
defmodule Absinthe.Phase.Document.Result do
@moduledoc false
# Produces data fit for external encoding from annotated value tree
alias Absinthe.{Blueprint, Phase, Type}
use Absinthe.Phase
@spec run(Blueprint.t | Phase.Error.t, Keyword.t) :: {:ok, map}
def run(%Blueprint{} = bp, _options \\ []) do
{:ok, %{bp | result: process(bp)}}
end
defp process(blueprint) do
result = case blueprint.resolution do
%{validation_errors: [], result: nil} ->
:execution_failed
%{validation_errors: [], result: result} ->
{:ok, field_data(result.fields, [])}
%{validation_errors: errors} ->
{:validation_failed, errors}
end
format_result(result)
end
defp format_result(:execution_failed) do
%{data: nil}
end
defp format_result({:ok, {data, []}}) do
%{data: data}
end
defp format_result({:ok, {data, errors}}) do
errors = errors |> Enum.uniq |> Enum.map(&format_error/1)
%{data: data, errors: errors}
end
defp format_result({:validation_failed, errors}) do
errors = errors |> Enum.uniq |> Enum.map(&format_error/1)
%{errors: errors}
end
defp format_result({:parse_failed, error}) do
%{errors: [format_error(error)]}
end
defp data(%{errors: [_|_] = field_errors}, errors), do: {nil, field_errors ++ errors}
# Leaf
defp data(%{value: nil}, errors), do: {nil, errors}
defp data(%{value: value, emitter: emitter}, errors) do
value =
case Type.unwrap(emitter.schema_node.type) do
%Type.Scalar{} = schema_node ->
Type.Scalar.serialize(schema_node, value)
%Type.Enum{} = schema_node ->
Type.Enum.serialize(schema_node, value)
end
{value, errors}
end
# Object
defp data(%{fields: fields}, errors), do: field_data(fields, errors)
# List
defp data(%{values: values}, errors), do: list_data(values, errors)
defp list_data(fields, errors, acc \\ [])
defp list_data([], errors, acc), do: {:lists.reverse(acc), errors}
defp list_data([%{errors: []} = field | fields], errors, acc) do
{value, errors} = data(field, errors)
list_data(fields, errors, [value | acc])
end
defp list_data([%{errors: errs} | fields], errors, acc) when length(errs) > 0 do
list_data(fields, errs ++ errors, acc)
end
defp field_data(fields, errors, acc \\ [])
defp field_data([], errors, acc), do: {Map.new(acc), errors}
defp field_data([field | fields], errors, acc) do
{value, errors} = data(field, errors)
field_data(fields, errors, [{field_name(field), value} | acc])
end
defp field_name(%{emitter: %{alias: nil, name: name}}), do: name
defp field_name(%{emitter: %{alias: name}}), do: name
defp field_name(%{emitter: %{name: name}}), do: name
defp format_error(%Phase.Error{locations: []} = error) do
error_object = %{message: error.message}
Map.merge(error.extra, error_object)
end
defp format_error(%Phase.Error{} = error) do
error_object = %{
message: error.message,
locations: Enum.map(error.locations, &format_location/1)
}
Map.merge(Map.new(error.extra), error_object)
end
defp format_location(%{line: line, column: col}) do
%{line: line || 0, column: col || 0}
end
end