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Leverage Open Api Specification 3 (swagger) to document, test, validate and explore your Plug and Phoenix APIs.
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lib/open_api_spex/cast/number.ex
defmodule OpenApiSpex.Cast.Number do
@moduledoc false
alias OpenApiSpex.Cast
# credo:disable-for-next-line
# TODO We need a way to distinguish numbers in (JSON) body vs in request parameters
# so we can reject strings values for properties of `type: :number`
@spec cast(ctx :: Cast.t()) :: {:ok, Cast.t()} | Cast.Error.t()
def cast(%{value: value} = ctx) when is_number(value) do
case cast_number(ctx) do
{:cast, ctx} -> cast(ctx)
result -> result
end
end
def cast(%{value: value} = ctx) when is_binary(value) do
case Float.parse(value) do
{value, ""} -> cast(%{ctx | value: value})
_ -> Cast.error(ctx, {:invalid_type, :number})
end
end
def cast(ctx) do
Cast.error(ctx, {:invalid_type, :number})
end
## Private functions
defp cast_number(%{value: value, schema: %{minimum: minimum, exclusiveMinimum: true}} = ctx)
when is_number(value) and is_number(minimum) do
if value > minimum do
Cast.success(ctx, [:minimum, :exclusiveMinimum])
else
Cast.error(ctx, {:exclusive_min, minimum, value})
end
end
defp cast_number(%{value: value, schema: %{minimum: minimum}} = ctx)
when is_number(value) and is_number(minimum) do
if value >= minimum do
Cast.success(ctx, :minimum)
else
Cast.error(ctx, {:minimum, minimum, value})
end
end
defp cast_number(%{value: value, schema: %{maximum: maximum, exclusiveMaximum: true}} = ctx)
when is_number(value) and is_number(maximum) do
if value < maximum do
Cast.success(ctx, [:maximum, :exclusiveMaximum])
else
Cast.error(ctx, {:exclusive_max, maximum, value})
end
end
defp cast_number(%{value: value, schema: %{maximum: maximum}} = ctx)
when is_number(value) and is_number(maximum) do
if value <= maximum do
Cast.success(ctx, :maximum)
else
Cast.error(ctx, {:maximum, maximum, value})
end
end
# For now, we don't do anything with `:multipleOf` for properties of `type: :number`
defp cast_number(ctx), do: Cast.ok(ctx)
end