peter
1e2b3c5d29
Review follow-up. The docstring said "channel/video description" but the helper is wired only to the channel store sites; clarify it is deliberately channel-only (video descriptions are user-facing prose where paragraph breaks carry meaning, unlike a channel's metadata block) so it doesn't read as an asymmetric fix. Also document that str.splitlines() folds CR/CRLF and Unicode line separators to "\n", and lock it with a test.
54 lines
2.7 KiB
Python
54 lines
2.7 KiB
Python
"""Small cross-cutting helpers shared across modules (kept dependency-light on purpose)."""
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import re
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from datetime import date, datetime, timezone
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def iso(dt: date | None) -> str | None:
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"""Serialize a date/datetime for a JSON response: ISO-8601, or None when the column is
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NULL. Single source of truth for the `x.isoformat() if x else None` idiom the routes had
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hand-rolled ~17 times — so a future tz/format tweak lands in one place. Accepts `date`
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too (datetime is a subclass) — e.g. MediaAsset.upload_date is a plain `date`."""
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return dt.isoformat() if dt is not None else None
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# Single source of truth for "looks like an email" — used by every endpoint that accepts an
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# address (auth register/reset/demo, admin invites + demo whitelist, the setup wizard). Keep
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# the strictness in one place so routes don't drift between this and a looser "@"-in check.
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_EMAIL_RE = re.compile(r"^[^@\s]+@[^@\s]+\.[^@\s]+$")
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def valid_email(value: str | None) -> bool:
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return bool(value and _EMAIL_RE.match(value))
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def now_utc() -> datetime:
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"""Current time as a timezone-aware UTC datetime."""
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return datetime.now(timezone.utc)
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def to_tsquery_str(q: str) -> str | None:
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"""Turn free-text into a to_tsquery() string: word runs ANDed together, the LAST word
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prefix-matched (`:*`) for as-you-type search — e.g. "ti amo magyar" → "ti & amo & magyar:*".
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Only `\\w` runs containing an alphanumeric are kept, so no tsquery operators can leak in
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(the string is built from sanitised tokens, never the raw query). Shared by the YouTube feed
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search and the Plex library search, hence this neutral home rather than either domain module."""
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tokens = [t for t in re.findall(r"\w+", q, flags=re.UNICODE) if any(c.isalnum() for c in t)]
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if not tokens:
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return None
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tokens[-1] = tokens[-1] + ":*"
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return " & ".join(tokens)
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def normalize_description(text: str | None) -> str | None:
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"""Strip whitespace-only lines from a CHANNEL description before storing. YouTube channel
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descriptions pad their contact/link blocks with runs of blank lines; keeping them wastes storage,
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bloats the About popover, and adds nothing to the search document. Drops purely-empty lines and
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right-strips each kept line; `str.splitlines()` also folds CR / CRLF and Unicode line separators
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to "\\n" (a benign line-ending normalization). None stays None; all-blank collapses to "".
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Deliberately CHANNEL-only — video descriptions are left with their original formatting: they are
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user-facing prose where paragraph breaks carry meaning, unlike a channel's metadata block."""
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if text is None:
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return None
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kept = [line.rstrip() for line in text.splitlines() if line.strip()]
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return "\n".join(kept)
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