photofloat/scanner/TreeWalker.py

98 lines
3.1 KiB
Python
Raw Normal View History

2011-05-05 13:04:40 +02:00
import os
import os.path
2011-05-13 03:38:14 +02:00
import sys
2011-05-05 14:42:04 +02:00
from datetime import datetime
2011-05-07 03:12:51 +02:00
from PhotoAlbum import Photo, Album, PhotoAlbumEncoder
2011-05-06 00:37:15 +02:00
from CachePath import json_cache, set_cache_path_base, file_mtime
2011-05-07 03:12:51 +02:00
import json
2011-05-05 13:04:40 +02:00
class TreeWalker:
def __init__(self, album_path, cache_path):
2011-05-06 00:37:15 +02:00
self.album_path = os.path.abspath(album_path)
self.cache_path = os.path.abspath(cache_path)
2011-05-05 13:04:40 +02:00
set_cache_path_base(self.album_path)
self.all_albums = list()
self.all_photos = list()
2011-05-06 00:37:15 +02:00
self.walk(self.album_path)
2011-05-07 03:12:51 +02:00
self.big_lists()
2011-05-05 13:04:40 +02:00
self.remove_stale()
def walk(self, path):
2011-05-05 15:17:21 +02:00
print "Walking %s" % path
2011-05-05 13:04:40 +02:00
cache = os.path.join(self.cache_path, json_cache(path))
cached = False
2011-05-05 14:42:04 +02:00
cached_album = None
if os.path.exists(cache):
2011-05-05 15:17:21 +02:00
print "Has cache %s" % path
2011-05-05 14:42:04 +02:00
cached_album = Album.from_cache(cache)
2011-05-06 00:37:15 +02:00
if file_mtime(path) <= file_mtime(cache):
2011-05-05 15:17:21 +02:00
print "Album is fully cached"
2011-05-05 14:42:04 +02:00
cached = True
album = cached_album
2011-05-06 00:37:15 +02:00
for photo in album.photos:
self.all_photos.append(photo)
2011-05-05 14:42:04 +02:00
if not cached:
2011-05-05 13:04:40 +02:00
album = Album(path)
for entry in os.listdir(path):
2011-05-09 23:49:09 +02:00
if entry[0] == '.':
continue
2011-05-13 03:38:14 +02:00
try:
entry = entry.decode(sys.getfilesystemencoding())
except:
pass
2011-05-05 13:04:40 +02:00
entry = os.path.join(path, entry)
if os.path.isdir(entry):
album.add_album(self.walk(entry))
elif not cached and os.path.isfile(entry):
2011-05-05 14:42:04 +02:00
cache_hit = False
if cached_album:
cached_photo = cached_album.photo_from_path(entry)
2011-05-09 23:49:09 +02:00
if cached_photo and file_mtime(entry) <= cached_photo.attributes["dateTimeFile"]:
2011-05-05 15:17:21 +02:00
print "Photo cache hit %s" % entry
2011-05-05 14:42:04 +02:00
cache_hit = True
photo = cached_photo
if not cache_hit:
2011-05-06 00:37:15 +02:00
print "No cache, scanning %s" % entry
2011-05-05 14:42:04 +02:00
photo = Photo(entry, self.cache_path)
2011-05-05 13:04:40 +02:00
if photo.is_valid:
self.all_photos.append(photo)
album.add_photo(photo)
2011-05-07 04:48:09 +02:00
if not album.empty:
print "Writing cache of %s" % album.cache_path
album.cache(self.cache_path)
self.all_albums.append(album)
else:
print "Not writing cache of %s because it's empty" % album.cache_path
2011-05-05 13:04:40 +02:00
return album
2011-05-07 03:12:51 +02:00
def big_lists(self):
photo_list = []
self.all_photos.sort()
for photo in self.all_photos:
photo_list.append(photo.path)
print "Writing all photos list."
fp = open(os.path.join(self.cache_path, "all_photos.json"), 'w')
json.dump(photo_list, fp, cls=PhotoAlbumEncoder)
fp.close()
photo_list.reverse()
print "Writing latest photos list."
fp = open(os.path.join(self.cache_path, "latest_photos.json"), 'w')
json.dump(photo_list[0:27], fp, cls=PhotoAlbumEncoder)
fp.close()
2011-05-05 13:04:40 +02:00
def remove_stale(self):
2011-05-07 04:48:09 +02:00
print "Building list of all cache entries."
all_cache_entries = { "all_photos.json": True, "latest_photos.json": True }
for album in self.all_albums:
all_cache_entries[album.cache_path] = True
for photo in self.all_photos:
for entry in photo.image_caches:
all_cache_entries[entry] = True
print "Searching stale cache entries."
2011-05-06 00:37:15 +02:00
for cache in os.listdir(self.cache_path):
2011-05-13 03:38:14 +02:00
try:
cache = cache.decode(sys.getfilesystemencoding())
except:
pass
2011-05-07 04:48:09 +02:00
if cache not in all_cache_entries:
2011-05-06 00:37:15 +02:00
print "Removing stale cache %s" % cache
2011-05-07 04:48:09 +02:00
os.unlink(os.path.join(self.cache_path, cache))