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59 lines
1.8 KiB
Plaintext
59 lines
1.8 KiB
Plaintext
// https://github.com/abhiaiyer91/graphql-currency-scalars
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import { GraphQLScalarType, Kind } from 'graphql';
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import { createGraphQLError } from '../error.js';
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function generateCurrency(value) {
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if (typeof value !== 'number') {
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throw createGraphQLError(`Currency cannot represent non integer type ${JSON.stringify(value)}`);
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}
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const currencyInCents = parseInt(value.toString(), 10);
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return (currencyInCents / 100).toLocaleString('en-US', {
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style: 'currency',
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currency: 'USD',
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});
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}
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function generateCents(value) {
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const digits = value.replace('$', '').replace(',', '');
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const number = parseFloat(digits);
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return number * 100;
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}
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/**
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* An Currency Scalar.
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*
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* Input:
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* This scalar takes a currency string as input and
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* formats it to currency in cents.
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*
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* Output:
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* This scalar serializes currency in cents to
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* currency strings.
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*/
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export const GraphQLUSCurrency = /*#__PURE__*/ new GraphQLScalarType({
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name: 'USCurrency',
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description: 'A currency string, such as $21.25',
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serialize: generateCurrency,
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parseValue(value) {
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if (typeof value !== 'string') {
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throw createGraphQLError(`Currency cannot represent non string type ${JSON.stringify(value)}`);
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}
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return generateCents(value);
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},
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parseLiteral(ast) {
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if (ast.kind === Kind.STRING) {
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if (typeof ast.value === 'string') {
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return generateCents(ast.value);
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}
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}
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throw createGraphQLError(`Currency cannot represent an invalid currency-string ${JSON.stringify(ast)}.`, {
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nodes: ast,
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});
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},
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extensions: {
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codegenScalarType: 'string',
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jsonSchema: {
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title: 'USCurrency',
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type: 'string',
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pattern: '^\\$[0-9]+(\\.[0-9]{2})?$',
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},
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},
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});
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