graphql-scalars
Version:
A collection of scalar types not included in base GraphQL.
39 lines (38 loc) • 1.56 kB
JavaScript
import { GraphQLScalarType, Kind } from 'graphql';
import { createGraphQLError } from '../../error.js';
const DEWEY_DECIMAL_REGEX = /^[0-9]{1,3}(?:\.[0-9]+)?$/;
const validate = (value, ast) => {
if (typeof value !== 'string') {
throw createGraphQLError(`Value is not string: ${value}`, { nodes: ast });
}
if (!DEWEY_DECIMAL_REGEX.test(value)) {
throw createGraphQLError(`Value is not a valid Dewey Decimal Number: ${value}`, { nodes: ast });
}
return value;
};
const specifiedByURL = 'https://www.oclc.org/content/dam/oclc/dewey/resources/summaries/deweysummaries.pdf';
export const GraphQLDeweyDecimalConfig = {
name: 'DeweyDecimal',
description: `A field whose value conforms to the standard DeweyDecimal format as specified by the OCLC https://www.oclc.org/content/dam/oclc/dewey/resources/summaries/deweysummaries.pdf`,
serialize: validate,
parseValue: validate,
parseLiteral(ast) {
if (ast.kind !== Kind.STRING) {
throw createGraphQLError(`Can only validate strings as DeweyDecimal but got a: ${ast.kind}`, {
nodes: ast,
});
}
return validate(ast.value, ast);
},
specifiedByURL,
specifiedByUrl: specifiedByURL,
extensions: {
codegenScalarType: 'string',
jsonSchema: {
title: 'DeweyDecimal',
type: 'string',
pattern: DEWEY_DECIMAL_REGEX.source,
},
},
};
export const GraphQLDeweyDecimal = /*#__PURE__*/ new GraphQLScalarType(GraphQLDeweyDecimalConfig);