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from pathlib import Path
import json
from enum import Enum
import hashlib
def add_or_create(dictio, key, value):
if key in dictio:
if value not in dictio[key]:
dictio[key].append(value)
else:
dictio[key] = [value]
class FileState(Enum):
Unused = 1
Owned = 2
Used = 3
links_to_path: Path = Path()
def can_write(self) -> bool:
return self in [FileState.Unused, FileState.Owned]
def links_to(self) -> str:
if self is not FileState.Owned:
raise Exception(f"Cannot call location on {self}")
return self.links_to_path
@staticmethod
def create_owned(links_to: Path) -> "FileState":
s = FileState.Owned
s.links_to_path = links_to
return s
class StateFile:
links = {}
dirs = {}
attr_to_save = ["links", "applydir", "dirs"]
def __init__(self, applydir):
# Generate unique string for each possible applydir
ustr = hashlib.md5(applydir.encode("utf-8")).hexdigest()[10:]
self.applydir = str(applydir)
self.statefile = Path(f"state_{ustr}.json")
if self.statefile.exists():
with self.statefile.open("r") as f:
self.set_from_dict(json.load(f))
else:
self.set_from_dict({})
self.stateclean = True
def set_from_dict(self, state):
self.links = state.get("links", {})
self.dirs = state.get("dirs", {})
self.applydir = state.get("applydir", self.applydir)
def save_to_dict(self):
all_attr = self.__dict__
res = {}
for key in self.attr_to_save:
res[key] = all_attr[key]
return res
def dump_state(self):
with self.statefile.open("w") as f:
json.dump(self.save_to_dict(), f)
def add_dir(self, path: Path, packagename: str):
# Add to state
add_or_create(self.dirs, str(path), packagename)
def add_link(self, dest, packagename):
self.links[str(dest)] = packagename
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