class GraphQL::StaticValidation::LiteralValidator

def validate(ast_value, type)
  if type.kind.non_null?
    (!ast_value.nil?) && validate(ast_value, type.of_type)
  elsif type.kind.list?
    item_type = type.of_type
    ensure_array(ast_value).all? { |val| validate(val, item_type) }
  elsif type.kind.scalar? && !ast_value.is_a?(GraphQL::Language::Nodes::AbstractNode) && !ast_value.is_a?(Array)
    type.valid_input?(ast_value)
  elsif type.kind.enum? && ast_value.is_a?(GraphQL::Language::Nodes::Enum)
    type.valid_input?(ast_value.name)
  elsif type.kind.input_object? && ast_value.is_a?(GraphQL::Language::Nodes::InputObject)
    required_input_fields_are_present(type, ast_value) &&
      present_input_field_values_are_valid(type, ast_value)
  elsif ast_value.is_a?(GraphQL::Language::Nodes::VariableIdentifier)
    true
  else
    false
  end
end