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d91bb2e331
- ParsedTransaction und ParsedStatement Datenklassen - parse_german_amount(): German format number parsing (1.234,56 -> Decimal) - parse_german_date(): DD.MM.YYYY date parsing with optional year - detect_bank(): Recognize VR/HVB/DKB from text markers - balance_difference(): Validate statement balance consistency - dedup_hash(): SHA256-based transaction deduplication Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
47 lines
1.2 KiB
Python
47 lines
1.2 KiB
Python
import re
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from dataclasses import dataclass, field
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from datetime import date
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from decimal import Decimal
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class ParserError(Exception):
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pass
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@dataclass(frozen=True)
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class ParsedTransaction:
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booking_date: date
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value_date: date | None
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amount: Decimal
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purpose: str
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counterparty: str
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@dataclass
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class ParsedStatement:
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bank: str
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iban: str | None
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period_start: date | None
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period_end: date | None
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opening_balance: Decimal | None
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closing_balance: Decimal | None
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transactions: list[ParsedTransaction] = field(default_factory=list)
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def parse_german_amount(s: str) -> Decimal:
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s = s.strip().replace(" ", "").replace(" ", "")
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neg = s.endswith("-") or s.startswith("-") or s.endswith("S")
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s = s.strip("+-SH")
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value = Decimal(s.replace(".", "").replace(",", "."))
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return -value if neg else value
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def parse_german_date(s: str, default_year: int | None = None) -> date:
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m = re.fullmatch(r"(\d{2})\.(\d{2})\.(\d{4})?", s.strip())
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if not m:
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raise ParserError(f"Kein Datum: {s!r}")
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year = int(m.group(3)) if m.group(3) else default_year
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if year is None:
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raise ParserError(f"Jahr fehlt: {s!r}")
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return date(year, int(m.group(2)), int(m.group(1)))
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