box-node-sdk: search for file first and if it exists upload new version

box-api-wrapper.js

const fileName = 'something.txt';
client.search.query (
    fileName, { limit: 1 },
    function(error, data) {
        if (
            data.total_count &&
            data.total_count > 0 &&
            data.entries[0].name === fileName
        ) {
            // have a match - upload new version
            client.files.uploadNewFileVersion(
                data.entries[0].id,
                stream,
                function(error, data) { /* callback */ }
            );
        } else {
            // no match - upload new file
            client.files.preflightUploadFile(
                id,
                { name: fileName },
                null,
                function(error) {
                    client.files.uploadFile(
                        id,
                        fileName,
                        stream,
                        function(error, data) { /* callback */ }
                    );
                }
            );
        }
    }
);