src/misc.py

   1 import datetime
   2 import mimetypes
   3 import os
   4 import PIL.Image
   5 import re
   6 import shutil
   7 import subprocess
   8
   9 def walk_media_files(dir_path):
  10     for root, dirs, files in os.walk(dir_path):
  11         for f in files:
  12             file_path = os.path.join(root, f)
  13             if _is_media_file(file_path):
  14                 yield (f, file_path)
  15
  16 def extract_timestamp(file_path, use_meta=False):
  17     time = None
  18     if use_meta:
  19         if _is_media_file(file_path, types=['image']):
  20             time = _extract_image_timestamp(file_path)
  21         elif _is_media_file(file_path, types=['video']):
  22             time = _extract_video_timestamp(file_path)
  23     if time:
  24         return time
  25     else:
  26         return os.path.getmtime(file_path)
  27
  28 def find_file(dir_path, file_name, file_size, exclude_dir):
  29     for root, dirs, files in os.walk(dir_path):
  30         if root.startswith(exclude_dir):
  31             continue
  32         for f in files:
  33             if f == file_name:
  34                 full_path = os.path.join(root, f)
  35                 if os.path.getsize(full_path) == file_size:
  36                     return root
  37     return None
  38
  39 def import_file(src_file_path, dst_file_path):
  40     shutil.copyfile(src_file_path, dst_file_path)
  41     src_stat = os.stat(src_file_path)
  42     dst_stat = os.stat(dst_file_path)
  43     os.utime( dst_file_path, ns=(dst_stat.st_atime_ns, src_stat.st_mtime_ns) )
  44
  45 def delete_dir_contents(dir_path):
  46     for file_name in os.listdir(dir_path):
  47         file_path = os.path.join(dir_path, file_name)
  48         if os.path.isfile(file_path) or os.path.islink(file_path):
  49             os.unlink(file_path)
  50         elif os.path.isdir(file_path):
  51             shutil.rmtree(file_path)
  52
  53 def _is_media_file(file_path, types=['image', 'video']):
  54     if not os.path.isfile(file_path):
  55         return False
  56     mime_type = mimetypes.guess_type(file_path)[0]
  57     if not mime_type:
  58         return False
  59     if not mime_type.split('/')[0] in types:
  60         return False
  61     return True
  62
  63 def _extract_image_timestamp(file_path):
  64     with PIL.Image.open(file_path) as image:
  65         exif = image._getexif()
  66         if exif and 36867 in exif:
  67             return datetime.datetime\
  68                            .strptime(exif[36867], '%Y:%m:%d %H:%M:%S')\
  69                            .timestamp()
  70     return None
  71
  72 def _extract_video_timestamp(file_path):
  73     p = subprocess.run(['ffmpeg', '-i', file_path],
  74                        capture_output=True, encoding='UTF-8')
  75     for line in p.stderr.splitlines():
  76         m = re.search('^.*creation_time.*: ([^ ]+)$', line)
  77         if m:
  78             return datetime.datetime\
  79                            .strptime(m.group(1), '%Y-%m-%dT%H:%M:%S.%fZ')\
  80                            .timestamp()
  81     return None