87 lines
2.9 KiB
Python
87 lines
2.9 KiB
Python
import os
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import os.path
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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 json_cache, set_cache_path_base, file_mtime
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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(album_path)
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self.cache_path = os.path.abspath(cache_path)
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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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def walk(self, path):
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print "Walking %s" % 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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print "Has cache %s" % path
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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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print "Album is fully cached"
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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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if not cached:
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album = Album(path)
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for entry in os.listdir(path):
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entry = os.path.join(path, entry)
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if os.path.isdir(entry):
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album.add_album(self.walk(entry))
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elif not cached and os.path.isfile(entry):
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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(entry) <= cached_photo.attributes["DateTimeFile"]:
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print "Photo cache hit %s" % 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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print "No cache, scanning %s" % 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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if not album.empty:
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print "Writing cache of %s" % album.cache_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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print "Not writing cache of %s because it's empty" % album.cache_path
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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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print "Writing all photos 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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photo_list.reverse()
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print "Writing latest photos list."
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fp = open(os.path.join(self.cache_path, "latest_photos.json"), 'w')
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json.dump(photo_list[0:27], fp, cls=PhotoAlbumEncoder)
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fp.close()
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def remove_stale(self):
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print "Building list of all cache entries."
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all_cache_entries = { "all_photos.json": True, "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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print "Searching stale cache entries."
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for cache in os.listdir(self.cache_path):
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if cache not in all_cache_entries:
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print "Removing stale cache %s" % cache
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os.unlink(os.path.join(self.cache_path, cache))
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