149 lines
5.8 KiB
Python
149 lines
5.8 KiB
Python
import os
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import os.path
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import sys
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from datetime import datetime
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from PhotoAlbum import Photo, Album, PhotoAlbumEncoder
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from CachePath import *
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import json
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class TreeWalker:
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def __init__(self, album_path, cache_path):
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self.album_path = os.path.abspath(
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album_path).decode(sys.getfilesystemencoding())
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self.cache_path = os.path.abspath(
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cache_path).decode(sys.getfilesystemencoding())
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set_cache_path_base(self.album_path)
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self.all_albums = list()
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self.all_photos = list()
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self.walk(self.album_path)
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self.big_lists()
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self.remove_stale()
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message("complete", "")
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def walk(self, path):
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next_level()
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if not os.access(path, os.R_OK | os.X_OK):
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message("access denied", os.path.basename(path))
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back_level()
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return None
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message("walking", os.path.basename(path))
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cache = os.path.join(self.cache_path, json_cache(path))
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cached = False
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cached_album = None
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if os.path.exists(cache):
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try:
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cached_album = Album.from_cache(cache)
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if file_mtime(path) <= file_mtime(cache):
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message("full cache", os.path.basename(path))
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cached = True
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album = cached_album
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for photo in album.photos:
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self.all_photos.append(photo)
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else:
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message("partial cache", os.path.basename(path))
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except KeyboardInterrupt:
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raise
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except:
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message("corrupt cache", os.path.basename(path))
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cached_album = None
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if not cached:
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album = Album(path)
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for entry in os.listdir(path):
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if entry[0] == '.':
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continue
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try:
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entry = entry.decode(sys.getfilesystemencoding())
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except KeyboardInterrupt:
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raise
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except:
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next_level()
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message("unicode error", entry.decode(
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sys.getfilesystemencoding(), "replace"))
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back_level()
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continue
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entry = os.path.join(path, entry)
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if os.path.isdir(entry):
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next_walked_album = self.walk(entry)
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if next_walked_album is not None:
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album.add_album(next_walked_album)
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elif not cached and os.path.isfile(entry):
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next_level()
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cache_hit = False
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if cached_album:
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cached_photo = cached_album.photo_from_path(entry)
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if (cached_photo and file_mtime(
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entry) <= cached_photo.attributes["dateTimeFile"]):
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cache_file = None
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if "mediaType" in cached_photo.attributes:
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if cached_photo.attributes["mediaType"] == "video":
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# if video
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cache_file = os.path.join(
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self.cache_path, video_cache(entry))
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else:
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# if image
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cache_file = os.path.join(
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self.cache_path,
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image_cache(entry, 1024, False))
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else:
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# if image
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cache_file = os.path.join(
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self.cache_path,
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image_cache(entry, 1024, False))
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# at this point we have full path to cache image/video
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# check if it actually exists
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if os.path.exists(cache_file):
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message("cache hit", os.path.basename(entry))
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cache_hit = True
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photo = cached_photo
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if not cache_hit:
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message("metainfo", os.path.basename(entry))
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photo = Photo(entry, self.cache_path)
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if photo.is_valid:
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self.all_photos.append(photo)
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album.add_photo(photo)
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else:
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message("unreadable", os.path.basename(entry))
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back_level()
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if not album.empty:
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message("caching", os.path.basename(path))
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album.cache(self.cache_path)
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self.all_albums.append(album)
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else:
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message("empty", os.path.basename(path))
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back_level()
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return album
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def big_lists(self):
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photo_list = []
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self.all_photos.sort()
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for photo in self.all_photos:
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photo_list.append(photo.path)
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message("caching", "all photos path list")
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fp = open(os.path.join(self.cache_path, "all_photos.json"), 'w')
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json.dump(photo_list, fp, cls=PhotoAlbumEncoder)
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fp.close()
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def remove_stale(self):
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message("cleanup", "building stale list")
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all_cache_entries = {"all_photos.json": True,
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"latest_photos.json": True}
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for album in self.all_albums:
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all_cache_entries[album.cache_path] = True
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for photo in self.all_photos:
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for entry in photo.image_caches:
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all_cache_entries[entry] = True
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message("cleanup", "searching for stale cache entries")
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for cache in os.listdir(self.cache_path):
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try:
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cache = cache.decode(sys.getfilesystemencoding())
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except KeyboardInterrupt:
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raise
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except:
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pass
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if cache not in all_cache_entries:
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message("cleanup", os.path.basename(cache))
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os.unlink(os.path.join(self.cache_path, cache))
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