graphql-scalars
Version:
A collection of scalar types not included in base GraphQL.
30 lines • 1.15 kB
JavaScript
import { GraphQLScalarType } from 'graphql/type/definition';
import { GraphQLError } from 'graphql/error';
import { Kind } from 'graphql/language';
const IPV4_REGEX = /^(?:(?:(?:0?0?[0-9]|0?[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])\.){3}(?:0?0?[0-9]|0?[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])(?:\/(?:[0-9]|[1-2][0-9]|3[0-2]))?)$/;
const validate = (value) => {
if (typeof value !== 'string') {
throw new TypeError(`Value is not string: ${value}`);
}
if (!(IPV4_REGEX.test(value))) {
throw new TypeError(`Value is not a valid IPv4 address: ${value}`);
}
return value;
};
export default 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);
}
});
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