@saeris/graphql-scalars/dist-src/ipv4.js

A collection of scalar types using Joi for validation

import { GraphQLScalarType, GraphQLError, Kind } from "graphql";
import { string as yupString } from "yup";

const validate = value => yupString().strict(true).typeError(`Value is not string: ${value}`).matches(new RegExp(`^(?:(?:(?:0{0,2}\\d|0?[1-9]\\d|1\\d\\d|2[0-4]\\d|25[0-5])\\.){3}(?:0{0,2}\\d|0?[1-9]\\d|1\\d\\d|2[0-4]\\d|25[0-5])(?:\\/(?:\\d|[1-2]\\d|3[0-2]))?)$`), `Value is not a valid IPv4 address: ${value}`).validateSync(value);

export const IPv4Scalar = `scalar IPv4`;
export const IPv4 = new GraphQLScalarType({
  name: `IPv4`,
  description: `A field whose value is a IPv4 address: https://en.wikipedia.org/wiki/IPv4.`,

  serialize(value) {
    return validate(value);
  },

  parseValue(value) {
    return validate(value);
  },

  parseLiteral(ast) {
    if (ast.kind !== Kind.STRING) {
      throw new GraphQLError(`Can only validate strings as IPv4 addresses but got a: ${ast.kind}`);
    }

    return validate(ast.value);
  }

});