from os import listdir
from os.path import isfile, join
import time

watch_directory = '/Users/alexanderh/watch_folder'
pollTime = 10


def list_files(path):
    return [f for f in listdir(path) if isfile(join(path, f))]


def listComparison(OriginalList: list, NewList: list):
    differencesList = [x for x in NewList if x not in OriginalList]
    return differencesList


def fileWatcher(watch_directory: str, pollTime: int):
    while True:
        if 'watching' not in locals():
            previousFileList = list_files(watch_directory)
            watching = True
            print('First Time')
            print(previousFileList)

        time.sleep(pollTime)

        newFileList = list_files(watch_directory)

        fileDiff = listComparison(previousFileList, newFileList)
        previousFileList = newFileList
        if len(fileDiff) == 0:
            continue
        notify_new_files(fileDiff)


def notify_new_files(fileDiff: list):
    print(fileDiff)


# print(list_files('/Users/alexanderh/ahosking_git/python-tools'))
fileWatcher(watch_directory, pollTime)