1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
"""Library for local storage of calendar data."""
from __future__ import annotations
from abc import ABC
from typing import Any
__all__ = [
"CalendarStore",
]
class CalendarStore(ABC):
"""Interface for external calendar storage.
This is an abstract class that may be implemented by callers to provide a
custom implementation for storing the calendar database.
"""
async def async_load(self) -> dict[str, Any] | None:
"""Load data."""
async def async_save(self, data: dict[str, Any]) -> None:
"""Save data."""
class InMemoryCalendarStore(CalendarStore):
"""An in memory implementation of CalendarStore."""
def __init__(self) -> None:
self._data: dict[str, Any] | None = None
async def async_load(self) -> dict[str, Any] | None:
"""Load data."""
return self._data
async def async_save(self, data: dict[str, Any]) -> None:
"""Save data."""
self._data = data
class ScopedCalendarStore(CalendarStore):
"""A store that reads/writes to a key within the store."""
def __init__(self, store: CalendarStore, key: str) -> None:
"""Initialize ScopedCalendarStore."""
self._store = store
self._key = key
async def async_load(self) -> dict[str, Any]:
"""Load data from the store."""
store_data = await self._store.async_load()
if not store_data:
store_data = {}
return store_data.get(self._key, {}) # type: ignore[no-any-return]
async def async_save(self, data: dict[str, Any]) -> None:
"""Save data to the store, performing a read/modify/write"""
store_data = await self._store.async_load()
if not store_data:
store_data = {}
store_data[self._key] = data
return await self._store.async_save(store_data)
|
