date_rename.py

import piexif  # Needs to be installed


import hashlib
import argparse
import os
import sys
from pathlib import Path
import datetime
import dateutil.parser


def hash_file(path):

    # BUF_SIZE is totally arbitrary, change for your app!
    BUF_SIZE = 65536  # lets read stuff in 64kb chunks!

    hash = hashlib.sha256()

    with open(path, 'rb') as f:
        while True:
            data = f.read(BUF_SIZE)
            if not data:
                break
            hash.update(data)

    return hash.hexdigest()


parser = argparse.ArgumentParser()
parser.add_argument("file_path", type=Path)

dir_path = parser.parse_args().file_path
# print(p.file_path, type(p.file_path), p.file_path.exists(), p.file_path.is_dir())

if not dir_path.exists():
    print(str(dir_path) + ": does not exist")
    exit(-1)

if not dir_path.is_dir():
    print(str(dir_path) + ": is not a directory")
    exit(-1)


dir_list = os.listdir(dir_path)

for elt in dir_list:
    print(elt)
    path = os.path.join(dir_path, elt)
    try:
        exif_dict = piexif.load(path)
    except:
        # print("No exif data")
        continue

    date_data = exif_dict["Exif"][36867]
    # print(exif_dict["Exif"][36867])

    date = dateutil.parser.parse(date_data)
    print(date)
    print(date.strftime("%Y_%m_%d-%H_%M_%S"))
    date = date.strftime("%Y_%m_%d-%H_%M_%S")
    hash_hex = hash_file(path)
    print(hash_hex)

    (start, ext) = os.path.splitext(elt)
    print(ext)
    new_filename = "{date}-{hash_hex}{ext}".format(
        date=date, hash_hex=hash_hex, ext=ext)
    new_path = os.path.join(dir_path, new_filename)

    print(new_path)
    os.rename(path, new_path)