graphql-scalars
Version:
A collection of scalar types not included in base GraphQL.
46 lines • 1.6 kB
JavaScript
// https://github.com/abhiaiyer91/graphql-currency-scalars
import { GraphQLScalarType } from 'graphql/type/definition';
import { Kind } from 'graphql/language';
function generateCurrency(value) {
if (typeof value !== 'number') {
throw new TypeError(`Currency cannot represent non integer type ${JSON.stringify(value)}`);
}
const currencyInCents = parseInt(value.toString(), 10);
return (currencyInCents / 100).toLocaleString('en-US', { style: 'currency', currency: 'USD' });
}
function generateCents(value) {
const digits = value.replace('$', '').replace(',', '');
const number = parseFloat(digits);
return number * 100;
}
/**
* An Currency Scalar.
*
* Input:
* This scalar takes a currency string as input and
* formats it to currency in cents.
*
* Output:
* This scalar serializes currency in cents to
* currency strings.
*/
export default new GraphQLScalarType({
name: 'USCurrency',
description: 'A currency string, such as $21.25',
serialize: generateCurrency,
parseValue(value) {
if (typeof value !== 'string') {
throw new TypeError(`Currency cannot represent non string type ${JSON.stringify(value)}`);
}
return generateCents(value);
},
parseLiteral(ast) {
if (ast.kind === Kind.STRING) {
if (typeof ast.value === 'string') {
return generateCents(ast.value);
}
}
throw new TypeError(`Currency cannot represent an invalid currency-string ${JSON.stringify(ast)}.`);
},
});
//# sourceMappingURL=USCurrency.js.map