class ReeSwagger::BuildSerializerSchema

def call(mapper, fields_filters = nil)
  if mapper.type
    return get_serializer_definition(mapper.type, method(:call).to_proc)
  end
  properties = mapper.fields.each_with_object({}) do |(_name, field), acc|
    next unless fields_filters.nil? || fields_filters.all? { _1.allow?(field.name) }
    if field.type == mapper
      acc[field.name] = {}
      next
    end
    swagger_field = {}
    field_mapper = field.type
    nested_fields_filters = fields_filters&.filter_map { _1.filter_for(field.name) }
    if field.fields_filter
      nested_fields_filters = if nested_fields_filters
        nested_fields_filters + [field.fields_filter]
      else
        [field.fields_filter]
      end
    end
    swagger_type = call(field_mapper, nested_fields_filters)
    swagger_field.merge!(swagger_type) if swagger_type
    description = field.doc
    swagger_field[:description] = description if description
    swagger_field[:nullable] = true if field.null
    acc[field.name] = swagger_field
  end
  {
    type: 'object',
    properties: properties
  }
end