src/migrator.py

   1 import datetime
   2 import logging
   3 import os
   4
   5 import misc
   6
   7 class Migrator:
   8     def __init__(self, src_dir, dst_dir):
   9         self._base_src_dir = src_dir
  10         self._base_dst_dir = dst_dir
  11
  12     def migrate(self, remove):
  13         for src_file_name, src_file_path in misc.walk_media_files(self._base_src_dir):
  14             logging.debug('Migrating %s...', src_file_name)
  15             try:
  16                 self._migrate_single(src_file_name, src_file_path, remove)
  17             except Exception as e:
  18                 logging.error('Error migrating %s: %s', src_file_path, str(e))
  19
  20     def _migrate_single(self, src_file_name, src_file_path, remove):
  21         meta_time = misc.extract_timestamp(src_file_path, use_meta=True)
  22
  23         dst_dir = os.path.join(self._base_dst_dir,
  24                                datetime.datetime.fromtimestamp(meta_time).strftime("%Y/%m"))
  25         dst_file_path = os.path.join(dst_dir, src_file_name)
  26
  27         if not os.path.exists(dst_file_path):
  28             alt_dst_dir = misc.find_file(self._base_dst_dir,
  29                                          src_file_name,
  30                                          os.path.getsize(src_file_path),
  31                                          exclude_dir=self._base_src_dir)
  32             if alt_dst_dir:
  33                 dst_dir = alt_dst_dir
  34                 dst_file_path = os.path.join(dst_dir, src_file_name)
  35
  36         if not os.path.exists(dst_file_path):
  37             if not os.path.exists(dst_dir):
  38                 os.makedirs(dst_dir)
  39             misc.import_file(src_file_path, dst_file_path)
  40         else:
  41             src_time = misc.extract_timestamp(src_file_path)
  42             dst_time = misc.extract_timestamp(dst_file_path)
  43             if src_time > dst_time:
  44                 misc.import_file(src_file_path, dst_file_path)
  45
  46         if remove:
  47             os.remove(src_file_path)
  48
  49     def cleanup(self):
  50         for root, dirs, files in os.walk(self._base_src_dir, topdown=False):
  51             for name in files:
  52                 full_path = os.path.join(root, name)
  53                 if not misc.is_media_file(full_path):
  54                     try:
  55                         os.remove(full_path)
  56                     except Exception as e:
  57                         logging.warn('Error cleaning file %s: %s', full_path, str(e))
  58             for name in dirs:
  59                 full_path = os.path.join(root, name)
  60                 try:
  61                     os.rmdir(full_path)
  62                 except Exception as e:
  63                     logging.warn('Error cleaning dir %s: %s', full_path, str(e))