string.rb

# frozen_string_literal: true

module GraphQL
  module Types
    class String < GraphQL::Schema::Scalar
      description "Represents textual data as UTF-8 character sequences. This type is most often used by GraphQL to represent free-form human-readable text."

      def self.coerce_result(value, ctx)
        str = value.to_s
        if str.encoding == Encoding::UTF_8 || str.ascii_only?
          str
        elsif str.frozen?
          str.encode(Encoding::UTF_8)
        else
          str.encode!(Encoding::UTF_8)
        end
      rescue EncodingError
        error = GraphQL::StringEncodingError.new(
          "String cannot represent value: #{value.inspect}",
          value: value,
          context: ctx
        )
        ctx.schema.type_error(error, ctx)
      end

      def self.coerce_input(value, _ctx)
        value.is_a?(::String) ? value : nil
      end

      default_scalar true
    end
  end
end