feat: proxies are updated if already in database

main.py

@@ -59,14 +59,22 @@ def main():
 
             # Save to DB
             session = session_factory.create_session()
-            proxy = Proxy(
+            existing_proxy = session.query(Proxy).filter_by(host=proxy.split(':')[0],
+                                                            port=int(proxy.split(':')[1])).first()
+
+            if existing_proxy:
+                existing_proxy.date_validated = datetime.now()
+                existing_proxy.egress_ip = ip
+            else:
+                new_proxy = Proxy(
                     host=proxy.split(':')[0],
                     port=int(proxy.split(':')[1]),
                     egress_ip=ip,
                     date_added=datetime.now(),
                     date_validated=datetime.now(),
                 )
-            session.add(proxy)
+                session.add(new_proxy)
+
             session.commit()
 
     # Create output directory if it does not exist