LSMS/scripts/lib/state.py

43 lines
1.0 KiB
Python

import json
import os
import stat
from typing import Dict, Any
class StateException(Exception):
pass
def load_state(state_dir: str) -> Dict[str, Any]:
state_file = os.path.join(state_dir, "state")
state_data = {}
if os.path.isfile(state_file):
data = None
try:
with open(state_file, 'rt') as fp:
data = fp.read()
if data is None:
raise StateException("Read state data is None.")
state_data = json.loads(data)
except Exception as e:
raise StateException("State data: '%s'; Exception: '%s'" % (str(data), str(e)))
return state_data
def store_state(state_dir: str, state_data: Dict[str, Any]):
# Create state dir if it does not exist.
if not os.path.exists(state_dir):
os.makedirs(state_dir)
state_file = os.path.join(state_dir, "state")
with open(state_file, 'wt') as fp:
fp.write(json.dumps(state_data))
os.chmod(state_file, stat.S_IREAD | stat.S_IWRITE)