ontotext-platform-custom-scalars/lib/scalars/unsigned/GraphQLUnsignedLong.js

A library of customized GraphQL scalars for Ontotext Platform

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = void 0;

var _graphql = require("graphql");

var _Utilities = require("../Utilities");

var UNSIGNED_LONG = 'UnsignedLong'; // defines max values allowed for the current type - 2^64 -1

var MAX_VALUE_ARRAY = Array.from('18446744073709551615', Number);

function convert(value) {
  if (!(0, _Utilities.isNumber)(value)) {
    throw new _graphql.GraphQLError("Expected number, but got '".concat(value, "'"));
  }

  var copy = value;

  if (!(0, _Utilities.isInteger)(copy)) {
    copy = Math.trunc(copy);
  }

  if ((0, _Utilities.isNegative)(copy)) {
    (0, _Utilities.throwNegativeValueError)(value, UNSIGNED_LONG);
  }

  if (checkOutOfRange(copy)) {
    (0, _Utilities.throwOutOfRangeError)(value, UNSIGNED_LONG);
  }

  return copy + '';
}

function checkOutOfRange(value) {
  var valueArray = Array.from(BigInt(value).toString(), Number);

  if (valueArray.length < MAX_VALUE_ARRAY.length) {
    return false;
  }

  if (valueArray.length > MAX_VALUE_ARRAY.length) {
    return true;
  } // the lengths are equal here so we need to check the actual values


  for (var idx = 0; idx < MAX_VALUE_ARRAY.length; idx++) {
    var maxValueNum = MAX_VALUE_ARRAY[idx];
    var valueNum = valueArray[idx]; // if the number at that position is less then the max number, the whole value should be OK

    if (maxValueNum > valueNum) {
      return false;
    } // if the value number is greater then the max number, the whole value exceeds the limit


    if (maxValueNum < valueNum) {
      return true;
    } // continue with the next number as the max number and the value number are equal at this point

  } // the value is equal to the max allowed


  return false;
}
/**
 * Defines custom GraphQLScalarType for unsigned Long values.
 */


var _default = new _graphql.GraphQLScalarType({
  name: UNSIGNED_LONG,
  description: "Unsigned 64-bit integer",
  serialize: convert,
  parseValue: convert,
  parseLiteral: function parseLiteral(node) {
    var type = node.kind;

    if (_graphql.Kind.INT !== type && _graphql.Kind.STRING !== type) {
      (0, _Utilities.throwConversionError)(type, UNSIGNED_LONG);
    }

    return convert(node.value);
  }
});

exports["default"] = _default;