app/utils/qr_utils.py

import qrcode
from pathlib import Path
import uuid

# Handle import for both package and direct execution
try:
    from ..core.config import settings
except ImportError:
    # If relative import fails, try absolute import
    try:
        from app.core.config import settings
    except ImportError:
        # Create a minimal settings object if import fails
        class MinimalSettings:
            QR_CODE_BOX_SIZE = 10
            QR_CODE_BORDER = 4
        settings = MinimalSettings()

def generate_qr_code_sync(data: str, output_path: Path, size: int) -> str:
    """
    Generiert einen QR-Code und speichert ihn.
    Gibt die UUID der generierten Datei (ohne Erweiterung) zurück.
    Verwendet box_size und border aus den settings.
    """
    qr = qrcode.QRCode(
        version=1, 
        error_correction=qrcode.constants.ERROR_CORRECT_L, 
        box_size=settings.QR_CODE_BOX_SIZE, 
        border=settings.QR_CODE_BORDER,
    )
    qr.add_data(data)
    qr.make(fit=True)

    img = qr.make_image(fill_color="black", back_color="white")
    
    output_path.mkdir(parents=True, exist_ok=True)
    
    file_id = str(uuid.uuid4())
    file_path_with_id = output_path / f"{file_id}.png"
    
    img.save(file_path_with_id)
    
    return file_id