def tryLoad(cls, filesystem: JsonableFilesystem,
path: PurePosixPath) -> "PrecomputedChunksInfo | Exception":
url = filesystem.geturl(path.as_posix())
if not filesystem.exists(path.as_posix()):
return FileNotFoundError(f"Could not find info file at {url}")
with filesystem.openbin(path.as_posix(), "r") as f:
try:
info_json = f.read().decode("utf8")
return PrecomputedChunksInfo.from_json_value(
json.loads(info_json))
except Exception:
return ValueError(
f"Could not interpret json info file at {url}")
def create(
cls,
*,
filesystem: JsonableFilesystem,
base_path:
Path, # path to the "directory" that should contain the info file
info: PrecomputedChunksInfo,
) -> "PrecomputedChunksSink":
if filesystem.exists(base_path.as_posix()):
filesystem.removedir(base_path.as_posix())
filesystem.makedirs(base_path.as_posix())
with filesystem.openbin(base_path.joinpath("info").as_posix(),
"w") as info_file:
info_file.write(json.dumps(info.to_json_value()).encode("utf8"))
for scale in info.scales_5d:
scale_path = base_path.joinpath(scale.key.as_posix().lstrip("/"))
filesystem.makedirs(scale_path.as_posix())
return PrecomputedChunksSink(filesystem=filesystem,
base_path=base_path,
info=info)