83 lines
2.2 KiB
Python
83 lines
2.2 KiB
Python
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"""Intent routing — pure regex, no AI, sub-millisecond.
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Loco-Soft Komm-Nr Format:
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Type-Buchstabe + 4-6 stellige Zahl, optional Space dazwischen.
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Type-Letter: N=Neu, T=Tageszul., V=Vorfuehr, D=Differenzbest., G=Gebraucht, L=Leihgabe.
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Beispiele: 'D9094', 'd9094', 'D 9094', 'n8093', 'L9083'
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Pure 4-6 stellige Zahlen werden als DVN-Lookup behandelt (DVN ist eindeutig).
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"""
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import re
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from dataclasses import dataclass
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from typing import Literal
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# Komm-Nr: Type + DVN (mit oder ohne Space)
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KOMM_NR_RE = re.compile(r"^[NTVDGLntvdgl]\s*\d{4,6}$")
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# DVN allein: pure Zahl 4-6 Stellen
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DVN_RE = re.compile(r"^\d{4,6}$")
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# VIN: 17 chars, no I/O/Q
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VIN_RE = re.compile(r"^[A-HJ-NPR-Z0-9]{17}$")
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@dataclass
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class Intent:
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type: Literal[
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"komm_nr",
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"dvn",
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"vin",
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"autocomplete_only",
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"keyword_search",
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"empty",
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]
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direct_redirect: bool = False
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normalized_query: str = ""
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def route(raw_query: str) -> Intent:
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q = (raw_query or "").strip()
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if not q:
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return Intent(type="empty", normalized_query="")
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# Rule 1: Komm-Nr (Type + DVN, e.g. 'D9094', 'D 9094', 'd9094')
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if KOMM_NR_RE.match(q):
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# Normalize: remove spaces, uppercase the type letter
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cleaned = q.replace(" ", "")
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normalized = cleaned[0].upper() + cleaned[1:]
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return Intent(
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type="komm_nr",
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direct_redirect=True,
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normalized_query=normalized,
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)
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# Rule 2: Pure 4-6 digit number = DVN lookup (eindeutig)
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if DVN_RE.match(q):
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return Intent(
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type="dvn",
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direct_redirect=True,
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normalized_query=q,
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)
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# Rule 3: 17-char alphanumeric (no IOQ) = VIN
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upper = q.upper().replace(" ", "")
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if VIN_RE.match(upper):
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return Intent(
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type="vin",
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direct_redirect=True,
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normalized_query=upper,
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)
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# Rule 4: Single char only -> autocomplete (FTS unbrauchbar bei 1 Zeichen)
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if len(q) < 2:
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return Intent(
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type="autocomplete_only",
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normalized_query=q.lower(),
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)
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# Rule 5: Default — keyword + fuzzy search
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return Intent(
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type="keyword_search",
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normalized_query=q.lower(),
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)
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