buffer Array to String and then saving in directory - node.js

Question

I am new to React and I am currently facing an issue that I have API written in Express.js in which I am receiving ur fetching whatever it is called an image uploaded from mobile device in a buffer Array and now I have to convert it into string and add extension to it (let say .jpg) and store it into MongoDB Atlas here is my API written in Express ```module.exports.submitFormDataFile = async (req, res) => {
var hkeyArray = [];
const body = req.body;
const collection_name = body.form_collect_name;
const formstructureresult = await FormsStructure.findOne({
collection_name: collection_name
});
formstructureresult.formdata.forEach((eachData) => {
if (eachData.element === 'file') hkeyArray.push(eachData.hkey);
});
// console.log(hkeyArray)
hkeyArray.forEach((element) => {
//In this part I was supposed to convert it in string and save with extension
console.log(req.files[element].data);
});
if (body._id != '' && body._id != null) {
try {
const result = db.collection(
collection_name
);
const results = await result.findOne({
_id: mongoose.Types.ObjectId(body._id)
});
if (!results) {
res.status(200).json({
ERROR: 1,
MESSAGE: 'Invalid Record'
});
} else {
delete body._id;
var newvalues = { $set: body};
const resu = await result.updateOne(results, newvalues);
if (!resu) {
res.status(404).json({
ERROR: '1',
MESSAGE: 'Unable to update'
});
} else {
res.status(200).json({
SUCCESS: '1',
MESSAGE: 'Record Updated Successfully'
});
}
}
} catch (error) {
console.log(error, 'error');
}
}
};
As everything is dynamic so I am fetching hkey which are the name in MongoDB from a collection and fetching other collection based on req.body received and byteArray is also received from req.body and conversion of it into a string I have to update document as shown in the code

Answer 1

Probleum solved! In my case solution was simple I just changed the code accordingly
hkeyArray.forEach((element) => {
//In this part I was supposed to convert it in string and save with extension
var imagedata = req.files[element].data;
let buff = new Buffer.from(imagedata , 'base64');
fs.writeFile(`element+'.jpg'`,buff, function (err) {
if (err) throw err;
console.log('Saved!');
});
body[element] = element+'.jpg'
});