Class: GraphQL::StaticValidation::LiteralValidator

Inherits:
Object
  • Object
show all
Defined in:
lib/graphql/static_validation/literal_validator.rb

Overview

Test whether ast_value is a valid input for type

Instance Method Summary collapse

Constructor Details

#initialize(context:) ⇒ LiteralValidator

Returns a new instance of LiteralValidator



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# File 'lib/graphql/static_validation/literal_validator.rb', line 6

def initialize(context:)
  @context = context
  @warden = context.warden
end

Instance Method Details

#validate(ast_value, type) ⇒ Object 



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# File 'lib/graphql/static_validation/literal_validator.rb', line 11

def validate(ast_value, type)
  if type.nil?
    # this means we're an undefined argument, see #present_input_field_values_are_valid
    maybe_raise_if_invalid(ast_value) do
      false
    end
  elsif ast_value.is_a?(GraphQL::Language::Nodes::NullValue)
    maybe_raise_if_invalid(ast_value) do
      !type.kind.non_null?
    end
  elsif type.kind.non_null?
    maybe_raise_if_invalid(ast_value) do
      (!ast_value.nil?)
    end && 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 ast_value.is_a?(GraphQL::Language::Nodes::VariableIdentifier)
    true
  elsif type.kind.scalar? && constant_scalar?(ast_value)
    maybe_raise_if_invalid(ast_value) do
      type.valid_input?(ast_value, @context)
    end
  elsif type.kind.enum?
    maybe_raise_if_invalid(ast_value) do
      if ast_value.is_a?(GraphQL::Language::Nodes::Enum)
        type.valid_input?(ast_value.name, @context)
      else
        # if our ast_value isn't an Enum it's going to be invalid so return false
        false
      end
    end
  elsif type.kind.input_object? && ast_value.is_a?(GraphQL::Language::Nodes::InputObject)
    maybe_raise_if_invalid(ast_value) do
      required_input_fields_are_present(type, ast_value) && present_input_field_values_are_valid(type, ast_value)
    end
  else
    maybe_raise_if_invalid(ast_value) do
      false
    end
  end
end