Contents

module GraphQL
  module StaticValidation
    # Test whether `ast_value` is a valid input for `type`
    class LiteralValidator
      def initialize(warden:)
        @warden = warden
      end

      def validate(ast_value, type)
        if ast_value.is_a?(GraphQL::Language::Nodes::NullValue)
          !type.kind.non_null?
        elsif 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, @warden)
        elsif type.kind.enum? && ast_value.is_a?(GraphQL::Language::Nodes::Enum)
          type.valid_input?(ast_value.name, @warden)
        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


      private


      def required_input_fields_are_present(type, ast_node)
        required_field_names = @warden.input_fields(type)
          .select { |f| f.type.kind.non_null? }
          .map(&:name)
        present_field_names = ast_node.arguments.map(&:name)
        missing_required_field_names = required_field_names - present_field_names
        missing_required_field_names.none?
      end

      def present_input_field_values_are_valid(type, ast_node)
        field_map = @warden.input_fields(type).reduce({}) { |m, f| m[f.name] = f; m}
        ast_node.arguments.all? do |value|
          field = field_map[value.name]
          field && validate(value.value, field.type)
        end
      end

      def ensure_array(value)
        value.is_a?(Array) ? value : [value]
      end
    end
  end
end

Version data entries

7 entries across 7 versions & 1 rubygems

Version	Path
graphql-1.2.6	lib/graphql/static_validation/literal_validator.rb
graphql-1.2.5	lib/graphql/static_validation/literal_validator.rb
graphql-1.2.4	lib/graphql/static_validation/literal_validator.rb
graphql-1.2.3	lib/graphql/static_validation/literal_validator.rb
graphql-1.2.2	lib/graphql/static_validation/literal_validator.rb
graphql-1.2.1	lib/graphql/static_validation/literal_validator.rb
graphql-1.2.0	lib/graphql/static_validation/literal_validator.rb