photofloat/scanner/TreeWalker.py
2011-05-05 20:03:47 -04:00

69 lines
2.1 KiB
Python

import os
import os.path
from datetime import datetime
from PhotoAlbum import Photo, Album
from CachePath import json_cache, set_cache_path_base, file_mtime
class TreeWalker:
def __init__(self, album_path, cache_path):
self.album_path = os.path.abspath(album_path)
self.cache_path = os.path.abspath(cache_path)
set_cache_path_base(self.album_path)
self.all_albums = list()
self.all_photos = list()
self.walk(self.album_path)
self.remove_stale()
def walk(self, path):
print "Walking %s" % path
cache = os.path.join(self.cache_path, json_cache(path))
cached = False
cached_album = None
if os.path.exists(cache):
print "Has cache %s" % path
cached_album = Album.from_cache(cache)
if file_mtime(path) <= file_mtime(cache):
print "Album is fully cached"
cached = True
album = cached_album
for photo in album.photos:
self.all_photos.append(photo)
if not cached:
album = Album(path)
for entry in os.listdir(path):
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):
cache_hit = False
if cached_album:
cached_photo = cached_album.photo_from_path(entry)
if cached_photo and file_mtime(entry) <= cached_photo.attributes["DateTimeFile"]:
print "Photo cache hit %s" % entry
cache_hit = True
photo = cached_photo
if not cache_hit:
print "No cache, scanning %s" % entry
photo = Photo(entry, self.cache_path)
if photo.is_valid:
self.all_photos.append(photo)
album.add_photo(photo)
print "Writing cache of %s" % album.cache_path
album.cache(self.cache_path)
self.all_albums.append(album)
return album
def remove_stale(self):
for cache in os.listdir(self.cache_path):
match = False
for album in self.all_albums:
if cache == album.cache_path:
match = True
break
if match:
continue
for photo in self.all_photos:
if cache in photo.image_caches:
match = True
break
if not match:
print "Removing stale cache %s" % cache
os.unlink(os.path.join(self.cache_path, cache))