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diff --git a/lib/open_api_spex/cast/object.ex b/lib/open_api_spex/cast/object.ex
index 7cad1d2..3ee8457 100644
--- a/lib/open_api_spex/cast/object.ex
+++ b/lib/open_api_spex/cast/object.ex
@@ -1,184 +1,195 @@
defmodule OpenApiSpex.Cast.Object do
@moduledoc false
alias OpenApiSpex.Cast
alias OpenApiSpex.Cast.Error
def cast(%{value: value} = ctx) when not is_map(value) do
Cast.error(ctx, {:invalid_type, :object})
end
def cast(%{value: value, schema: %{properties: nil}}) do
{:ok, value}
end
def cast(%{value: value, schema: schema} = ctx) do
original_value = value
schema_properties = schema.properties || %{}
with :ok <- check_unrecognized_properties(ctx, schema_properties),
value = cast_atom_keys(value, schema_properties),
ctx = %{ctx | value: value},
{:ok, ctx} <- cast_additional_properties(ctx, original_value),
:ok <- check_required_fields(ctx, schema),
:ok <- check_max_properties(ctx),
:ok <- check_min_properties(ctx),
{:ok, value} <- cast_properties(%{ctx | schema: schema_properties}) do
value_with_defaults = apply_defaults(value, schema_properties)
ctx = to_struct(%{ctx | value: value_with_defaults})
{:ok, ctx}
end
end
# When additionalProperties is not false, extra properties are allowed in input
defp check_unrecognized_properties(%{schema: %{additionalProperties: ap}}, _expected_keys)
when ap != false do
:ok
end
defp check_unrecognized_properties(%{value: value} = ctx, expected_keys) do
input_keys = value |> Map.keys() |> Enum.map(&to_string/1)
schema_keys = expected_keys |> Map.keys() |> Enum.map(&to_string/1)
extra_keys = input_keys -- schema_keys
if extra_keys == [] do
:ok
else
[name | _] = extra_keys
ctx = %{ctx | path: [name | ctx.path]}
Cast.error(ctx, {:unexpected_field, name})
end
end
defp check_required_fields(%{value: input_map} = ctx, schema) do
required = schema.required || []
input_keys = Map.keys(input_map)
missing_keys = required -- input_keys
if missing_keys == [] do
:ok
else
errors =
Enum.map(missing_keys, fn key ->
ctx = %{ctx | path: [key | ctx.path]}
Error.new(ctx, {:missing_field, key})
end)
{:error, ctx.errors ++ errors}
end
end
defp check_max_properties(%{schema: %{maxProperties: max_properties}} = ctx)
when is_integer(max_properties) do
count = ctx.value |> Map.keys() |> length()
if count > max_properties do
Cast.error(ctx, {:max_properties, max_properties, count})
else
:ok
end
end
defp check_max_properties(_ctx), do: :ok
defp check_min_properties(%{schema: %{minProperties: min_properties}} = ctx)
when is_integer(min_properties) do
count = ctx.value |> Map.keys() |> length()
if count < min_properties do
Cast.error(ctx, {:min_properties, min_properties, count})
else
:ok
end
end
defp check_min_properties(_ctx), do: :ok
defp cast_atom_keys(input_map, properties) do
Enum.reduce(properties, %{}, fn {key, _}, output ->
string_key = to_string(key)
case input_map do
%{^key => value} -> Map.put(output, key, value)
%{^string_key => value} -> Map.put(output, key, value)
_ -> output
end
end)
end
defp cast_properties(%{value: object, schema: schema_properties} = ctx) do
Enum.reduce(object, {:ok, %{}}, fn
{key, value}, {:ok, output} ->
cast_property(%{ctx | key: key, value: value, schema: schema_properties}, output)
_, error ->
error
end)
end
defp cast_additional_properties(%{schema: %{additionalProperties: ap}} = ctx, original_value) do
original_value
|> get_additional_properties(ctx)
|> Enum.reduce({:ok, ctx}, fn
{key, value}, {:ok, ctx} ->
ap_cast_context = %{ctx | key: key, value: value, path: [key | ctx.path], schema: ap}
cast_additional_property(ap_cast_context, ctx)
_, error ->
error
end)
end
defp get_additional_properties(original_value, ctx) do
recognized_keys =
(ctx.schema.properties || %{})
|> Map.keys()
|> Enum.flat_map(&[&1, to_string(&1)])
|> MapSet.new()
for {key, _value} = prop <- original_value,
not MapSet.member?(recognized_keys, key) do
prop
end
end
defp cast_additional_property(%{schema: ap} = ctx, output_ctx) when is_map(ap) do
with {:ok, value} <- Cast.cast(ctx) do
{:ok, %{output_ctx | value: Map.put(output_ctx.value, ctx.key, value)}}
end
end
defp cast_additional_property(%{schema: ap} = ctx, output_ctx) when ap in [nil, true] do
{:ok, %{output_ctx | value: Map.put(output_ctx.value, ctx.key, ctx.value)}}
end
defp cast_property(%{key: key, schema: schema_properties} = ctx, output) do
prop_schema = Map.get(schema_properties, key)
path = [key | ctx.path]
- with {:ok, value} <- Cast.cast(%{ctx | path: path, schema: prop_schema}) do
+ with {:ok, value} <- Cast.cast(%{ctx | path: path, schema: prop_schema}),
+ {:ok, value} <- after_cast(value, prop_schema) do
{:ok, Map.put(output, key, value)}
end
end
defp apply_defaults(object_value, schema_properties) do
Enum.reduce(schema_properties, object_value, &apply_default/2)
end
defp apply_default({_key, %{default: nil}}, object_value), do: object_value
defp apply_default({key, %{default: default_value}}, object_value) do
if Map.has_key?(object_value, key) do
object_value
else
Map.put(object_value, key, default_value)
end
end
defp apply_default(_, object_value), do: object_value
defp to_struct(%{value: value = %_{}}), do: value
defp to_struct(%{value: value, schema: %{"x-struct": nil}}), do: value
defp to_struct(%{value: value, schema: %{"x-struct": module}}),
do: struct(module, value)
+
+ defp after_cast(value, %{"x-struct": module} = schema) when not is_nil(module) do
+ if function_exported?(module, :after_cast, 2) do
+ module.after_cast(value, schema)
+ else
+ {:ok, value}
+ end
+ end
+
+ defp after_cast(value, _), do: {:ok, value}
end

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