graphql-scalars
Version:
A collection of scalar types not included in base GraphQL.
33 lines • 1.25 kB
JavaScript
import { GraphQLScalarType } from 'graphql/type/definition';
import { GraphQLError } from 'graphql/error';
import { Kind } from 'graphql/language';
const validate = (value) => {
const parsed = typeof value === 'string' ? parseInt(value, 10) : value;
if (typeof parsed !== 'number' || Number.isNaN(parsed)) {
throw new TypeError(`Value is not a number: ${value}`);
}
if (parsed === Infinity || parsed === -Infinity) {
throw new TypeError(`Value is not a finite number: ${value}`);
}
if (parsed <= 0 || parsed > 65535) {
throw new TypeError(`Value is not a valid TCP port: ${value}`);
}
return parsed;
};
export default new GraphQLScalarType({
name: `Port`,
description: `A field whose value is a valid TCP port within the range of 0 to 65535: https://en.wikipedia.org/wiki/Transmission_Control_Protocol#TCP_ports`,
serialize(value) {
return validate(value);
},
parseValue(value) {
return validate(value);
},
parseLiteral(ast) {
if (ast.kind !== Kind.INT) {
throw new GraphQLError(`Can only validate integers as TCP ports but got a: ${ast.kind}`);
}
return validate(ast.value);
}
});
//# sourceMappingURL=Port.js.map