def update_bg_repo(self, capacity=10):
image_to_use = {}
date_of_image = datetime.date.today()
oneday = datetime.timedelta(1)
while len(image_to_use) < capacity:
image = apod_util.grab_from_apod(self.orig_image_dir,
date_of_image)
if apod_util.image_can_be_bg(image):
image_to_use[date_of_image] = image
date_of_image -= oneday
self.clear_bg_dir()
for i in image_to_use.values():
self.link_to_bg_dir(i)
apod_util.compose_bg_scroll(self.bg_scroll_file)
message('image repo updated, capacity={0:d}'.format(capacity))
def __init__(self, root_dir, bg_image_dir="image_use_as_bg",
orig_image_dir='image_orig'):
self.root_dir = os.path.abspath(root_dir)
self.bg_image_dir = os.path.join(self.root_dir, bg_image_dir)
self.orig_image_dir = os.path.join(self.root_dir, orig_image_dir)
self.bg_scroll_file = os.path.join(self.bg_image_dir,
'apod_backgrounds.xml')
if os.path.isdir(self.root_dir):
message('notice: root exist: {0:s}'.format(self.root_dir))
for i in [self.root_dir, self.bg_image_dir, self.orig_image_dir]:
if not os.path.isdir(i):
os.makedirs(i)
message('+ {0:s}'.format(i))
message('Apod grabber initialized\n-> {0:s}'.format(self.root_dir))
def clear_bg_dir(self):
for i in apod_util.list_image_file(self.bg_image_dir):
os.unlink(i)
message('image link purged: {0:s}'.format(self.bg_image_dir))
def link_to_bg_dir(self, image):
dest = os.path.join(self.bg_image_dir,
os.path.basename(image))
os.symlink(image, dest)
message('image linked:\n {0:s}\n->{1:s}'.format(image, dest))
