54 lines
1.6 KiB
Python
54 lines
1.6 KiB
Python
import os
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from datetime import datetime, timezone
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from typing import Literal, Sequence
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def select_best_live_path(states: Sequence) -> str:
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"""
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Return the best on-disk path among cache states:
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1) Prefer a path that exists with needs_verify == False (already verified).
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2) Otherwise, pick the first path that exists.
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3) Otherwise return empty string.
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"""
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alive = [
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s
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for s in states
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if getattr(s, "file_path", None) and os.path.isfile(s.file_path)
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]
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if not alive:
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return ""
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for s in alive:
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if not getattr(s, "needs_verify", False):
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return s.file_path
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return alive[0].file_path
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ALLOWED_ROOTS: tuple[Literal["models", "input", "output"], ...] = (
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"models",
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"input",
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"output",
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)
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def escape_sql_like_string(s: str, escape: str = "!") -> tuple[str, str]:
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"""Escapes %, _ and the escape char itself in a LIKE prefix.
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Returns (escaped_prefix, escape_char). Caller should append '%' and pass escape=escape_char to .like().
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"""
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s = s.replace(escape, escape + escape) # escape the escape char first
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s = s.replace("%", escape + "%").replace("_", escape + "_") # escape LIKE wildcards
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return s, escape
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def get_utc_now() -> datetime:
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"""Naive UTC timestamp (no tzinfo). We always treat DB datetimes as UTC."""
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return datetime.now(timezone.utc).replace(tzinfo=None)
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def normalize_tags(tags: list[str] | None) -> list[str]:
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"""
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Normalize a list of tags by:
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- Stripping whitespace and converting to lowercase.
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- Removing duplicates.
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"""
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return [t.strip().lower() for t in (tags or []) if (t or "").strip()]
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