Is there an easy way of getting the latest filename from the latest folder in s3 bucket using node.js – Amazon web services

this would be my approach:

just a function to check if a file is a directory:

const isDirectory = source => fs.lstatSync(source).isDirectory();

Here we order contents of a directory: first we get every file (and directory), map them so we have and array of objects with the file and creation time, then sort it.

const oderFiles = dir => {
    return fs.readdirSync(dir)
        .map((file) => ({ file, mtime: fs.lstatSync(path.join(dir, file)).ctime }))
        .sort((a, b) => b.mtime.getTime() - a.mtime.getTime());
}

pass in a directory. this function will recursively order directory contents. if the first result (newest file) is a directory it calls itself with the given directory, if its a file it will return the path to the file.

const findFile = dir => {
    const files = orderFiles(dir);
    if(files.length === 0) return undefined;
    const {file} = files[0]
    return isDirectory(file) ? findFile(path.join(dir,file)) : path.resolve(file);
}