63 lines
1.6 KiB
Python
63 lines
1.6 KiB
Python
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import json
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from datetime import datetime
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from pathlib import Path
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from .config import Time
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class Cache:
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def __init__(self, file: Path, exp: int | float) -> None:
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self.file = file
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self.exp = exp
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@staticmethod
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def near_hr(dt: datetime) -> float:
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return dt.replace(minute=0, second=0, microsecond=0).timestamp()
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def is_fresh(
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self,
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entry: dict,
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nearest_hr: bool,
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) -> bool:
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ts: float | int = entry.get("timestamp", 31496400)
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if nearest_hr:
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ts = self.near_hr(Time.from_ts(ts))
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return Time.now().timestamp() - ts < self.exp
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def load(
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self,
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nearest_hr: bool = False,
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per_entry: bool = True,
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) -> dict[str, dict[str, str | float]]:
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try:
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data: dict = json.loads(self.file.read_text(encoding="utf-8"))
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except (FileNotFoundError, json.JSONDecodeError):
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return {}
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if per_entry:
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return {k: v for k, v in data.items() if self.is_fresh(v, nearest_hr)}
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ts: float | int = data.get("timestamp", 31496400)
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if nearest_hr:
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ts = self.near_hr(Time.from_ts(ts))
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return data if self.is_fresh({"timestamp": ts}, False) else {}
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def write(self, data: dict) -> None:
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self.file.parent.mkdir(parents=True, exist_ok=True)
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self.file.write_text(
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json.dumps(
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data,
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indent=2,
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ensure_ascii=False,
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),
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encoding="utf-8",
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)
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__all__ = ["Cache"]
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