app = Flask(__name__)

    config_file = (

        os.path.abspath("config.json")

        if app.debug

        else os.path.abspath("/etc/membership.json")

    )

    try:

        app.config.from_file(config_file, load=json.load)

    except FileNotFoundError:

        pass

    qrcode.init_app(app)

    babel.init_app(app)

    _default_secret_key = base64.b64encode(secrets.token_bytes()).decode("utf-8")

    app.config["SECRET_KEY"] = os.environ.get("SECRET_KEY", _default_secret_key)

    app.config["LANGUAGES"] = ["en", "de", "fr", "lb"]

    app.config.setdefault("SUPPORTING_FEE", 40)

    app.config.setdefault("REGULAR_FEE", 120)

    app.config.setdefault("DIGICASH_ENABLED", True)

    app.config.setdefault("CRYPTOCURRENCIES", dict())

    @babel.localeselector

    def get_locale():

        if not g.get("lang_code", None):

            g.lang_code = request.accept_languages.best_match(app.config["LANGUAGES"])

        return g.lang_code

    from .views import root_page

    app.register_blueprint(root_page)

    @app.route("/")

    def home():

        g.lang_code = request.accept_languages.best_match(app.config["LANGUAGES"])

        return redirect(url_for("root.index"))

    app.cli.add_command(babel_cli)

    return app

@babel_cli.command("extract")

def babel_extract():

        <li>{% trans %}Amount: {{ price }}€{% endtrans %}</li>

      </ul>

    {% elif form.payment.data == 'cash' %}

      <p>{% trans %}Please bring {{ price }}€ with you the next time you meet us!{% endtrans %}</p>

    {% elif form.payment.data in config["CRYPTOCURRENCIES"] %}

      <div class="cryptocontainer">

        <div>

          <ul class="cryptotext">

            <li><b>{% trans %}Address:{% endtrans %}</b> {{ config["CRYPTOCURRENCIES"][form.payment.data]["ADDRESS"] }}</li>

            <li><b>{% trans %}Label:{% endtrans %}</b> Membership Fee</li>

            <li><b>{% trans %}Message:{% endtrans %}</b> {{ year }} {{ form.username.data }}</li>

            <li><b>{% trans %}Amount:{% endtrans %}</b> {{ price }} {{ config["CRYPTOCURRENCIES"][form.payment.data]["COMMODITY"] }}</li>

          </ul>

        </div>

        {% set address = config["CRYPTOCURRENCIES"][form.payment.data]["ADDRESS"] %}

        {% set crypto_url=config["CRYPTOCURRENCIES"][form.payment.data]["URL"].format(address=address, amount=price, year=year, username=form.username.data) %}

        <div><img class="cryptoqrcode" src="{{ qrcode(crypto_url) }}" /></div>

      </div>

    {% elif form.payment.data == 'digicash' %}

      <div class="digicash">

        {% set payconiq_url='https://payconiq.com/t/1/62068d4d71445b0006dfbd5d?A={amount}&R=Membership&D={username}'.format(amount=price, username=form.username.data) %}

        <div><p>{% trans %}Pay with DigiCash/Payconiq!{% endtrans %}</p></div>

        <div><img class="cryptoqrcode" src="{{ qrcode(payconiq_url) }}" /></div>

      </div>

    {% endif %}

    <div class="signature">

      <p class="membersignature">{% trans %}Luxembourg, the{% endtrans %}</p>

      <p class="adminsignature">

        {{ _("Signature of your legal representative") if form.minor_member.data else _("Your signature") }}

      </p>

    </div>

    <footer>

      <hr />

      <b>C</b>haos <b>C</b>omputer <b>C</b>lub <b>L</b>ëtzebuerg A.S.B.L.<br />

      Halle Victor Hugo - 60 Avenue Victor Hugo L-1750 Luxembourg (Europe)<br />

      info@c3l.lu - <a href="https://c3l.lu">http://c3l.lu</a>

    </footer>

  </body>

</html>

@root_page.url_defaults

def add_lang_code(endpoint, values):

    values.setdefault("lang_code", g.lang_code)

@root_page.url_value_preprocessor

def pull_lang_code(endpoint, values):

    lang_code = values.pop("lang_code")

    if lang_code != "favicon.ico":

        g.lang_code = lang_code

@root_page.route("/", methods=("GET", "POST"))

def index():

    form = MembershipForm()

    choices = [

        ("cash", gettext("by cash")),

        ("wire transfer", gettext("by wire transfer")),

    ]

    if current_app.config["DIGICASH_ENABLED"]:

        choices.append(("digicash", gettext("by DigiCash/Payconiq")))

    choices.extend(

        (cryptocurrency_label, " ".join((gettext("by"), cryptocurrency_label.title())))

        for cryptocurrency_label, options in current_app.config[

            "CRYPTOCURRENCIES"

        ].items()

        if options["ENABLED"]

    )

    form.payment.choices = choices

    if form.validate_on_submit():

        if (

            form.minor_member.data

            or form.student.data

            or form.membership.data == "supporting"

        ):

            price = current_app.config["SUPPORTING_FEE"]

        elif form.starving.data:

            price = 1

        else:

            price = current_app.config["REGULAR_FEE"]

        if form.starving.data:

            status = "Starving"

        elif form.minor_member.data or form.student.data:

            status = "Student"

        elif form.membership.data == "supporting":

            status = "Supporter"

        else:

            status = "Regular"

        if form.payment.data in current_app.config["CRYPTOCURRENCIES"]:

            try:

                current_conversion_r = requests.get(

                    current_app.config["CONVERSION_URL"], timeout=30

                )

                current_conversion_r.raise_for_status()

            except:

                return render_template("index.html", form=form, crypto_error=True), 503

            else:

                current_conversion = current_conversion_r.json()

                commodity = current_app.config["CRYPTOCURRENCIES"][form.payment.data][

                    "COMMODITY"

                ]

                price = current_conversion[commodity][status.upper()]

            price = price * 100

        now = date.today()

        xml_data = {

            "status": status,

            "name": form.fullname.data,

            "birthday": form.birthday.data

            if form.birthday.data is not None

            else date(9999, 12, 12),

            "username": form.username.data,

            "email": form.email.data,

            "address": re.sub(

                "\s+",

                " ",

                " ".join(

                    (

                        form.street.data,

                        form.zip.data,

                        form.city.data,

                        form.state.data,

                        form.country.data,

                    )

                ),

            ),