feat(b4w): add human-readable B4wExport repr/str output; fix comdirect account lookup and export formatting helpers

src/models/_common.py

@@ -34,10 +34,27 @@ def _parse_date_german(date_str: str) -> date | None:
     return date(day=day, month=month, year=year)
 
 
+def date2str(value: date | None, default="--", date_format="%Y-%m-%d") -> str:
+    if value:
+        return value.strftime(date_format)
+    return default
+
+
 def _parse_decimal_german(decimal_str: str) -> Decimal:
     return Decimal(decimal_str.replace(".", "").replace(",", "."))
 
 
+def decimal2str(value: Decimal) -> str:
+    value = Decimal(f"{value:.2f}")
+    int_part, _, frac = str(value).partition(".")
+    groups: list[str] = []
+    while len(int_part) > 3:
+        groups.insert(0, int_part[-3:])
+        int_part = int_part[:-3]
+    groups.insert(0, int_part or "0")
+    return f"{'.'.join(groups)},{frac or '00'}"
+
+
 type Csv2DictRow = dict[str, str]
 type Csv2Dict = list[Csv2DictRow]
 type CsV2DictMulti = dict[str, Csv2Dict]

src/models/b4w.py

@@ -6,7 +6,14 @@ from sqlalchemy import Column, Date, ForeignKey, Integer, String, UniqueConstrai
 from sqlalchemy.orm import relationship
 
 from src.constants import IBAN_PATTERN, Currency
-from src.models._common import BaseModelDb, ExportBaseModel, IngestdbBase, Sign, _hash
+from src.models._common import (
+    BaseModelDb,
+    ExportBaseModel,
+    IngestdbBase,
+    Sign,
+    _hash,
+    date2str,
+)
 
 
 class B4wExport(ExportBaseModel):
@@ -32,6 +39,29 @@ class B4wExport(ExportBaseModel):
     )
     notes: str = Field(alias="Notes")
 
+    def parameters_to_str(self):
+        return (
+            f"Id1='{self.id}', "
+            f"OwnrAcctIBAN='{self.account_iban!s}', "
+            f"AmtCcy='{self.amount_currency!s}', "
+            f"ValDt='{date2str(self.date_valid)}', "
+            f"BookgDt='{date2str( self.date_book )}', "
+            f"Amt='{self.amount!s}', "
+            f"OwnrAcctCcy='{self.account_currency!s}', "
+            f"CdtDbtInd='{self.sign!s}', "
+            f"RmtInf='{self.reference}', "
+            f"RmtdNm='{self.other_name}', "
+            f"RmtdAcctIBAN='{self.other_iban}', "
+            f"Category='{self.category.to_str() if self.category else ''}', "
+            f"Notes='{self.notes}'"
+        )
+
+    def __repr__(self):
+        return f"B4wExport({self.parameters_to_str()})"
+
+    def __str__(self):
+        return f"B4wExport({self.parameters_to_str()})"
+
     @computed_field
     @property
     def hash_id(self) -> str: