generate vCard in utils.py; added Tests

app.py

@@ -2,8 +2,7 @@ from flask import Flask, render_template, request, redirect, url_for
 from flask_sqlalchemy import SQLAlchemy
 import os
 import re
-import pathlib
-import unicodedata
+from utils import generate_vcard
 
 BASE_DIR = os.path.dirname(os.path.abspath(__file__))
 DB_PATH = os.path.join(BASE_DIR, 'anmeldung.db')
@@ -98,42 +97,8 @@ def index():
 
         # vCard 4.0 erzeugen und speichern
         try:
-            vcards_dir = os.path.join(BASE_DIR, 'vcards')
-            os.makedirs(vcards_dir, exist_ok=True)
-
-            # sanitize filename: remove diacritics and unsafe chars
-            def slug(s):
-                s = unicodedata.normalize('NFKD', s)
-                s = ''.join(c for c in s if not unicodedata.combining(c))
-                s = ''.join(c for c in s if c.isalnum() or c in (' ', '_', '-'))
-                return s.replace(' ', '_')
-
-            filename = f"{slug(adresse.nachname)}_{slug(adresse.vorname)}_{adresse.id}.vcf"
-            filepath = os.path.join(vcards_dir, filename)
-
-            # build vCard 4.0 content
-            lines = [
-                'BEGIN:VCARD',
-                'VERSION:4.0',
-                f'N:{adresse.nachname};{adresse.vorname};;;',
-                f'FN:{adresse.vorname} {adresse.nachname}',
-            ]
-            # ADR: PO Box;Extended;Street;Locality;Region;PostalCode;Country
-            street = adresse.strasse or ''
-            if adresse.hausnummer:
-                street = f"{street} {adresse.hausnummer}".strip()
-            adr = f'ADR:;;{street};{adresse.ort};;{adresse.plz};{adresse.land}'
-            lines.append(adr)
-            if adresse.email:
-                lines.append(f'EMAIL;TYPE=internet:{adresse.email}')
-            phone = ''
-            if adresse.telefon_vorwahl or adresse.telefon_nummer:
-                phone = f"+{adresse.telefon_vorwahl}{adresse.telefon_nummer}".replace('++', '+')
-                lines.append(f'TEL;TYPE=voice:{phone}')
-            lines.append('END:VCARD')
-
-            with open(filepath, 'w', encoding='utf-8') as f:
-                f.write('\n'.join(lines))
+            # generate vcard using helper
+            generate_vcard(adresse, BASE_DIR)
         except Exception:
             # nicht kritisch: bei Fehlern nicht die ganze Anfrage abbrechen
             pass