ontotext-platform-custom-scalars/src/scalars/GraphQLInteger.js

A library of customized GraphQL scalars for Ontotext Platform

import {GraphQLError, GraphQLScalarType, Kind} from "graphql";
import {parseAsBigNumber, throwConversionError, isInteger} from "./Utilities";

/**
 * Defines custom GraphQLScalarType for Integer values.
 */
export default new GraphQLScalarType({
    name: `Integer`,

    description: `Integer, unlimited digits`,

    serialize(value) {
        return parseAsBigNumber(value, this.name);
    },

    parseValue(value) {
        return parseAsBigNumber(value, this.name);
    },

    parseLiteral(node) {
        let kind = node.kind;
        if (Kind.INT !== kind && Kind.STRING !== kind) {
            throwConversionError(kind, this.name);
        }

        let value = node.value;
        if (isInteger(value)) {
            return value + '';
        }

        throw new GraphQLError(`Expected '${this.name}' value, but got '${value}'`);
    }
});