feat(app): refactor to app-factory; add application package and routes

application/__init__.py

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+import os
+from flask import Flask
+from .extensions import db, migrate
+import logging
+from logging.handlers import RotatingFileHandler
+
+
+def create_app(config=None):
+    BASE_DIR = os.path.dirname(os.path.abspath(__file__))
+    # point templates/static to repository-level folders for compatibility
+    project_root = os.path.dirname(BASE_DIR)
+    app = Flask(__name__, template_folder=os.path.join(project_root, 'templates'), static_folder=os.path.join(project_root, 'static'), instance_relative_config=True)
+    # default config
+    DB_PATH = os.path.join(os.path.dirname(BASE_DIR), 'anmeldung.db')
+    app.config.setdefault('SQLALCHEMY_DATABASE_URI', f'sqlite:///{DB_PATH}')
+    app.config.setdefault('SQLALCHEMY_TRACK_MODIFICATIONS', False)
+
+    if config:
+        app.config.update(config)
+
+    # init extensions
+    db.init_app(app)
+    migrate.init_app(app, db)
+
+    # logging setup (mirror previous behavior)
+    LOG_DIR = os.path.join(os.path.dirname(BASE_DIR), 'logs')
+    os.makedirs(LOG_DIR, exist_ok=True)
+    log_file = os.path.join(LOG_DIR, 'app.log')
+    handler = RotatingFileHandler(log_file, maxBytes=5 * 1024 * 1024, backupCount=3)
+    formatter = logging.Formatter('%(asctime)s %(levelname)s %(name)s: %(message)s')
+    handler.setFormatter(formatter)
+    handler.setLevel(logging.INFO)
+    app.logger.addHandler(handler)
+    app.logger.setLevel(logging.INFO)
+
+    # register blueprints
+    from .routes import bp as public_bp
+    app.register_blueprint(public_bp)
+
+    # expose BASE_DIR on app for compatibility
+    app.BASE_DIR = os.path.dirname(BASE_DIR)
+
+    return app

application/extensions.py

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+from flask_sqlalchemy import SQLAlchemy
+from flask_migrate import Migrate
+
+db = SQLAlchemy()
+migrate = Migrate()

application/models.py

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+from .extensions import db
+
+
+class Adresse(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    vorname = db.Column(db.String(100), nullable=False)
+    nachname = db.Column(db.String(100), nullable=False)
+    strasse = db.Column(db.String(200), nullable=False)
+    hausnummer = db.Column(db.String(50), nullable=True)
+    plz = db.Column(db.String(20), nullable=False)
+    ort = db.Column(db.String(100), nullable=False)
+    land = db.Column(db.String(50), default='Deutschland')
+    telefon_vorwahl = db.Column(db.String(20))
+    telefon_nummer = db.Column(db.String(50))
+    email = db.Column(db.String(200))
+
+
+class Frage(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    text = db.Column(db.String(500), nullable=False)
+
+
+class Antwort(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    adresse_id = db.Column(db.Integer, db.ForeignKey('adresse.id'), nullable=False)
+    frage_id = db.Column(db.Integer, db.ForeignKey('frage.id'), nullable=False)
+    text = db.Column(db.String(1000), nullable=True)

application/routes.py

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+from flask import Blueprint, render_template, request, redirect, url_for, current_app
+from .extensions import db
+from .models import Adresse, Frage, Antwort
+from utils import generate_vcard
+import re
+
+bp = Blueprint('public', __name__)
+
+
+@bp.route('/', methods=['GET', 'POST'])
+def index():
+    if request.method == 'POST':
+        vorname = request.form.get('vorname', '').strip()
+        nachname = request.form.get('nachname', '').strip()
+        strasse = request.form.get('strasse', '').strip()
+        hausnummer = request.form.get('hausnummer', '').strip()
+        plz = request.form.get('plz', '').strip()
+        ort = request.form.get('ort', '').strip()
+        land = request.form.get('land', 'Deutschland').strip()
+        telefon_vorwahl = request.form.get('telefon_vorwahl', '').strip()
+        telefon_nummer = request.form.get('telefon_nummer', '').strip()
+        email = request.form.get('email', '').strip()
+
+        errors = {}
+        email_re = re.compile(r"[^@]+@[^@]+\.[^@]+")
+        if email:
+            if not email_re.match(email):
+                errors['email'] = 'Ungültige E-Mail-Adresse'
+        if plz:
+            if not re.fullmatch(r"\d{5}", plz):
+                errors['plz'] = 'Postleitzahl muss genau 5 Ziffern haben'
+
+        if errors:
+            fragen = Frage.query.all()
+            form = request.form.to_dict()
+            return render_template('index.html', fragen=fragen, errors=errors, form=form)
+
+        adresse = Adresse(
+            vorname=vorname,
+            nachname=nachname,
+            strasse=strasse,
+            hausnummer=hausnummer,
+            plz=plz,
+            ort=ort,
+            land=land,
+            telefon_vorwahl=telefon_vorwahl,
+            telefon_nummer=telefon_nummer,
+            email=email,
+        )
+        db.session.add(adresse)
+        db.session.commit()
+
+        fragen = Frage.query.all()
+        for frage in fragen:
+            key = f'frage_{frage.id}'
+            antwort_text = request.form.get(key, '').strip()
+            antwort = Antwort(adresse_id=adresse.id, frage_id=frage.id, text=antwort_text)
+            db.session.add(antwort)
+        db.session.commit()
+
+        try:
+            base_dir = current_app.config.get('BASE_DIR') if current_app.config.get('BASE_DIR') else getattr(current_app, 'BASE_DIR', '.')
+            generate_vcard(adresse, base_dir)
+        except Exception as e:
+            current_app.logger.exception('Fehler beim Erzeugen der vCard for adresse id=%s: %s', adresse.id if hasattr(adresse, 'id') else 'unknown', e)
+
+        return redirect(url_for('public.danke', id=adresse.id))
+
+    fragen = Frage.query.all()
+    return render_template('index.html', fragen=fragen)
+
+
+@bp.route('/danke')
+def danke():
+    id = request.args.get('id')
+    adresse = db.session.get(Adresse, int(id)) if id else None
+    return render_template('danke.html', adresse=adresse)