mindnet/app/core/chunk_payload.py

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"""
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chunk_payload.py v2.2.1
Zweck:
- Erzeugt Chunk-Payloads (inkl. 'text' und 'window'), vollständig
rückwärtskompatibel zu v2.2.0 (Signaturen beibehalten).
- Neu: optionale Typ-Profile via Type-Registry (chunk_profile), ohne
bestehendes Verhalten zu brechen. Fällt automatisch auf die bisherigen
Einstellungen zurück, wenn keine Registry vorhanden/konfiguriert ist.
Wichtig:
- Signatur von make_chunk_payloads bleibt kompatibel:
make_chunk_payloads(chunks, note_id, note_title, note_type, note_path, ...)
- 'window' != 'text', wenn Overlap > 0; ansonsten identisch.
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"""
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from __future__ import annotations
from typing import Any, Dict, Iterable, List, Optional, Tuple
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# Annahme: Diese Utilities existieren bei dir bereits (aus funktionierendem Stand):
# - Chunk Typ (dataclass/NamedTuple) mit Feldern: id (oder idx), text, start, end
# - windowing-Funktion (oder wir erzeugen ein simples Fenster über Nachbar-Chunks)
try:
from app.core.chunker import Chunk # type: ignore
except Exception:
# Minimaler Fallback, falls die Import-Umgebung abweicht; in produktiven
# Deployments wird der echte Chunk-Typ vorhanden sein.
from typing import NamedTuple
class Chunk(NamedTuple):
idx: int
text: str
start: int
end: int
# Optional: Registry einbinden
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try:
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from app.core.type_registry import resolve_chunk_profile
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except Exception:
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def resolve_chunk_profile(note_type: str, default_profile: str = "default") -> str:
return default_profile
DEFAULT_OVERLAP = 0 # falls euer chunker keinen Overlap liefert
DEFAULT_PROFILE_TO_OVERLAP = {
"short": 40,
"medium": 80,
"long": 120,
"default": 0,
}
def _estimate_overlap(profile: str) -> int:
return int(DEFAULT_PROFILE_TO_OVERLAP.get(profile, DEFAULT_OVERLAP))
def _make_window_text(chunks: List[Chunk], i: int, overlap_chars: int) -> str:
"""
Erzeugt ein einfaches Fenster: left-overlap-Anteil aus dem vorherigen Chunk
+ eigener Text + right-overlap-Anteil aus dem nächsten Chunk.
"""
center = chunks[i].text
if overlap_chars <= 0:
return center
left = ""
right = ""
if i > 0:
ltxt = chunks[i - 1].text
left = ltxt[-overlap_chars:] if len(ltxt) > overlap_chars else ltxt
if i + 1 < len(chunks):
rtxt = chunks[i + 1].text
right = rtxt[:overlap_chars] if len(rtxt) > overlap_chars else rtxt
# Verhindere doppelte Leerzeichen
pieces = [p for p in [left, center, right] if p]
return (" ".join(pieces)).strip()
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def make_chunk_payloads(
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chunks: Iterable[Chunk],
note_id: str,
note_title: str,
note_type: Optional[str],
note_path: str,
*,
chunk_profile: Optional[str] = None,
window_overwrite: Optional[int] = None,
extra_payload: Optional[Dict[str, Any]] = None,
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) -> List[Dict[str, Any]]:
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"""
Rückwärtskompatible Fabrik für Chunk-Payloads.
Parameter:
- chunks: Iterable[Chunk] — Ergebnis aus eurem chunker.
- note_id: str — ID der Note (z. B. aus Frontmatter 'id').
- note_title: str — Titel der Note.
- note_type: Optional[str] — Typ aus Frontmatter (concept, task, ...).
- note_path: str — relativer Pfad im Vault.
- chunk_profile: Optional[str] — Override-Profil (z. B. 'short').
- window_overwrite: Optional[int] — erzwinge Overlap in Zeichen.
- extra_payload: Optional[dict] — zusätzliche Felder in Payload.
Rückgabe:
- Liste von dict-Payloads; jedes enthält mind.:
{ "note_id", "note_title", "note_type", "path", "chunk_id",
"text", "window", "start", "end" }
"""
clist = list(chunks)
# Profil bestimmen (Registry → default → Override)
effective_profile = (
chunk_profile
or (resolve_chunk_profile(note_type or "concept") if note_type else "default")
or "default"
)
overlap = window_overwrite if isinstance(window_overwrite, int) else _estimate_overlap(effective_profile)
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payloads: List[Dict[str, Any]] = []
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for i, c in enumerate(clist):
# Chunk-ID stabil: note_id#(laufende Nummer 1..n) – rückwärtskompatibel
# Falls euer Chunk bereits eine ID hat, könnt ihr sie beibehalten.
cid = f"{note_id}#{i+1}"
window_txt = _make_window_text(clist, i, overlap)
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pl: Dict[str, Any] = {
"note_id": note_id,
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"note_title": note_title,
"note_type": note_type,
"path": note_path,
"chunk_id": cid,
"text": getattr(c, "text", ""),
"window": window_txt,
"start": getattr(c, "start", 0),
"end": getattr(c, "end", 0),
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}
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if extra_payload:
pl.update(extra_payload)
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payloads.append(pl)
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return payloads