Parsing CSV string with nodeJS without a library - node.js

Question

I want to create a cloud function in firebase that parses csv files and adds them as a firestore document. Somehow, none of the libraries I try seem to work. Whenever I add a csv library, the function won't even deploy. therefore, I want to parse a CSV file without using a library. However, I cant seem to figure out how to parse it correctly when using maps and arrays. I have the following string in string type. Replaced some data with placeholders.
subject,contacts,dateStart,dateEnd,timeStart,timeEnd,isRecurring,frequence,location,room,visitors,sendInvite
Sollicitatie,[{"name":"<name here>","email":"<email here>","phoneNumber":"<phone number here>"}],28-09-2020,28-09-2020,13:00,14:00,true,yearly,<location here>,2,[{"name":"<name here>","email":"<email here>","visitorImage":"imgRef","visitorType":"Relation","phoneNumber":"<telephone here>","licencePlate":"<licencePlate>"}],true
I want to get this data in firestore as the following:
subject: subject,
contacts:[
{
name: name,
email: email,
phoneNumber: phoneNumber
},
{
name: name,
email: email,
phoneNumber
}
],
dateStart: dateStart,
dateEnd, dateEnd,
timeStart, timeEnd,
isRecurring, isRecurring,
frequence, frequence,
location: location,
room: room,
visitors:[
{
name: name,
email: email,
phoneNumber: phoneNumber
},
{
name: name,
email: email,
phoneNumber
//Whatever data also needs to be added
}
]
Is there a library that will work/is there a problem with my package.json, or is there a script that will work? I tried to write a script that will do this, but it is far from working. I have tried the following and got the right strings, but I cant get the arrays the right way.
const convert = (from, to) => str => Buffer.from(str, from).toString(to);
const hexToUtf8 = convert('hex', 'utf8');
const string = hexToUtf8(contents);
const data = string.split('\n');
for(i=0;i<=data.length - 1;i++){
if(i == 0){
continue;
}
const row = data[i];
const rowValues = [];
const elems = row.split(",");
console.log(elems);
var arrayParse;
var parsing = 0;
for(j=0;j<=elems.length - 1;j++){
const elem = elems[j];
if(parsing == 1){
arrayParse += "," + elem;
continue;
}else if(elem[0] == "["){
arrayParse += elem;
parsing = 1;
continue;
}else if(elem[elem.length - 1] == "]"){
arrayParse += elem;
parsing = 0;
rowValues.push(arrayParse);
arrayParse = "";
continue;
}else{
rowValues.push(elem);
}
}
console.log(rowValues);