Chunk uploading with Filepond to NodeJS running Express - node.js

Question

I need to upload large files (2GB+) using Filepond to a NodeJS server running Express. These files need to be streamed (because of their size) to two locations...a local folder and a remote folder.
My research led me to a solution using tus-node-server https://github.com/pqina/filepond/issues/48
I've implemented the solution as seen below but I don't know how to:
1. Change the name of the file on upload (it uses a UID, I'd like to use the filename from the "metadata" property)
2. Execute a function on the server during or after the upload.
Any help?
Client.js
Filepond.setOptions({
server: {
process: (fieldName, file, metadata, load, error, progress, abort) => {
var upload = new tus.Upload(file, {
endpoint: `/upload`,
retryDelays: [0, 1000, 3000, 5000],
metadata: {
filename: file.name,
filetype: file.type
},
onError: function(err) {
console.log("Failed because: " + err);
error(err)
},
onProgress: function(bytesUploaded, bytesTotal) {
progress(true, bytesUploaded, bytesTotal)
},
onSuccess: function() {
load(upload.url.split('/').pop())
}
})
// Start the upload
upload.start();
return {
abort: () => {
upload.abort()
abort()
}
}
}
}
})
Server.js
const express = require('express');
const app = express();
const uploadApp = express();
const Client = require('ftp');
const path = require('path');
const tus = require('tus-node-server');
var tusServer = new tus.Server();
tusServer.datastore = new tus.FileStore({
path: '/public/files'
});
uploadApp.all('*', tusServer.handle.bind(tusServer));
app.use('/public', express.static(path.join(__dirname, "/public")));
app.use('/upload', uploadApp);
app.listen(3000);
Before trying this method I was using app.post to receive the upload and perform further action.
app.post('/upload', (req, res, next) => {
let uploadFile = req.files.file,
fileName = req.files.file.name,
ftp = new Client();
uploadFile.mv(`${__dirname}/public/files/${fileName}`, err => {
if (err) { return res.status(500).send(err) };
res.json({ file: `public/${req.files.file.name}` })
});
ftp.on('ready', () => {
ftp.put(fileName, `/ftppath/${fileName}`, err => {
if (err) throw err;
ftp.end();
})
})
ftp.connect(ftpOptions)
});