How to edit this code to wait for a file fully uploaded with node.js? - node.js

Question

Hi I am trying to download a file and when it downloads it first has the extension .tmp or .crdownload, then after it is fully downloaded the extension changes to whatever the correct extension is, for example .png. I want to wait until the file no longer has the extension .tmp or .crdownload and then save the new file path to a variable. How can I do this? I have looked here on Stack Overflow but it is not answering all my questions. This is a unique and specific question. That is what I have so far. I don't mind if you don't use this code as long as the resulting code waits for the extension to change and saves the path to a variable as a string.
Code:
var downloadanduploadpath = "C:/Users/user1/Downloads";
//ptc mean path to check. have differnt name so the variable name of the placeholder in the function call is not the same name as the variable name in the function
var ptc = downloadanduploadpath;
var pathtocheck = ptc;
var timetowaitforimagefiledownloaded = 5000;
var fs = require('fs');
//let dirToCheck = pathtocheck;
var filecheckerfiles = fs.readdirSync(pathtocheck);
var filecheckerlatestPath = `${pathtocheck}/${filecheckerfiles[0]}`;
var filecheckerlatestTimeStamp = fs.statSync(filecheckerlatestPath).mtime.getTime();
filecheckerfiles.forEach(filecheckerfile => {
var filecheckerpath = `${pathtocheck}/${filecheckerfile}`;
var filecheckertimeStamp = fs.statSync(filecheckerpath).mtime.getTime();
if (filecheckertimeStamp > filecheckerlatestTimeStamp) {
filecheckerlatestTimeStamp = filecheckertimeStamp;
lastdownloadedimagetimestamp = filecheckerlatestTimeStamp;
lastdownloadedimage = filecheckerpath;
}
});
//get the extention of the last downloaded image
var lastdownloadedimageextention = lastdownloadedimage.split(".").pop();
//"png" || "jpg" || "jpeg" || "gif" ||
//if the file is a .tmp the image is not fully downloaded. run code inside to wait for it to not be a tmp file showing that the image if fully downloaded
if((lastdownloadedimageextention == "tmp") || (lastdownloadedimageextention == "crdownload") ){
//Show the file path to the console
console.log(lastdownloadedimage);
//show file not fill downloaded message in console
console.log("Image not yet fully downloaded.");
//show preparing to wait message in console
console.log("Preparing to wait for full download.");
//get all the files in the folder directory/path
var filecheckerfindpathbytimestamp = fs.readdirSync(pathtocheck);
console.log("hi1");
//define variable to store the path of the last donwloaded image foudn by timestamp
var lastdownloadedimagefoundbytimestamppath;
console.log("hi2");
//use the timestamp as an index to get the last downloaded file and then check the file at this timestamp(the last downloaded image) and check its file path.
//using the timestamp as an image lets us check the file without using the name because the name changes from .tmp to .png for example, so we are unable to get the
//the file by its name because of this name , so we use the timestamp to specifc the file we want to check the extention of instead
//find path of the last downloaded file by using the time to find it
filecheckerfindpathbytimestamp.forEach(filecheckerfindpathbytimestampfile => {
var filecheckerfindpathbytimestamppath = `${pathtocheck}/${filecheckerfindpathbytimestampfile}`;
console.log("hi3");
var filecheckerfindpathbytimestamptimeStamp = fs.statSync(filecheckerfindpathbytimestamppath).mtime.getTime();
console.log("hi4");
if (filecheckerfindpathbytimestamptimeStamp == lastdownloadedimagetimestamp) {
console.log("hi5");
lastdownloadedimagefoundbytimestamppath = filecheckerfindpathbytimestamppath;
console.log("hi6");
}
});
console.log("hi7");
//keep checking the file that ends in .tmp untill it changes from .tmp . once the file is no longer endng in .tmp indicating that the file is
//fully downloaded this path that is looking for the fiel path including the .tmp will no longer be valid because of the file path becomeing .png for example
// that it has fully downloaded, and the file path will not return true because it is no longer valid with the .tmp extention.
//once this path is no longer valid we will know that the file has fully downloaded because that path no longer ends in .tmp. We can then end the while loop.
//because file if fully downloaded.
//
while(fs.existsSync(lastdownloadedimagefoundbytimestamppath) == true){
//while((fs.existsSync(lastdownloadedimage)) == true){
//Show the file path to the console
console.log(lastdownloadedimage);
//Wait code
//Wait on the image converting page
await page2.type('.jsoninputtextarea', " ", {delay:timetowaitforimagefiledownloaded});
//show waiting for file fully download message in console
console.log("Waiting for image to fully download.");
}
//create varaible to find path of the last downloaded file by using the time to find it now that it is fully downloaded
var filecheckerfindfullydownloadedfiletimestamp = fs.readdirSync(pathtocheck);
//find path of the last downloaded file by using the time to find it now that it is fully downloaded
filecheckerfindfullydownloadedfiletimestamp.forEach(filecheckerfindfullydownloadedfilefile => {
var filecheckerfindfullydownloadedfilepath = `${pathtocheck}/${filecheckerfindfullydownloadedfilefile}`;
console.log("hi8");
var filecheckerfindfullydownloadedfiletimeStamp = fs.statSync(filecheckerfindfullydownloadedfilepath).mtime.getTime();
console.log("hi9");
if (filecheckerfindfullydownloadedfiletimeStamp == lastdownloadedimagetimestamp) {
console.log("hi10");
lastdownloadedimagefoundbytimestamppath = filecheckerfindfullydownloadedfilepath;
console.log("hi11");
}
});
console.log("hi12");
//Set lastdownloaded image to the path the now ends in the file extention (example .png) now instead of .tmp
//
lastdownloadedimage = lastdownloadedimagefoundbytimestamppath;
}
//Remove the path the of the image so we only have image name and file type
//Before: C:/Users/edtec/Downloads/image.png After: image.png
lastdownloadedimage = lastdownloadedimage.replace(downloadanduploadpath, "");
//Return lastdownloadedimage
//return lastdownloadedimage;
//}
//lastdownloadedimage = getlastdownloadedimage(downloadanduploadpath);
//console.log(lastdownloadedimage);
console.log(lastdownloadedimage);