Simple api for push subscriptions

push_subscriptions_api.py

@app.route("/api/push-subscriptions", methods=["POST"])
def create_push_subscription():
    json_data = request.get_json()
    subscription = PushSubscription.query.filter_by(
        subscription_json=json_data['subscription_json']
    ).first()
    if subscription is None:
        subscription = PushSubscription(
            subscription_json=json_data['subscription_json']
        )
        db.session.add(subscription)
        db.session.commit()
    return jsonify({
        "status": "success"
    })