feat(repo): migrate to Gitea (#300)

Reviewed-on: public/pypilot#300

app/query_normalisation.py

@@ -0,0 +1,34 @@
+#!/usr/bin/env python3
+
+"""MODULE: Provides functions that ensure an IP address is
+available to query the APIs for."""
+
+import ipaddress
+import socket
+
+import requests
+
+
+def is_ip_address(query: str) -> bool:
+    """Verifies if a given query is a valid IPv4 address."""
+    try:
+        ipaddress.ip_address(query)
+        return True
+    except ValueError:
+        return False
+
+
+def resolve_domain_name(domain_name: str) -> ipaddress.IPv4Address | None:
+    """Resolve a domain name via DNS or return None."""
+    try:
+        result: str = socket.gethostbyname(domain_name)
+        ip_address: ipaddress.IPv4Address = ipaddress.IPv4Address(result)
+        return ip_address
+    except (socket.gaierror, ipaddress.AddressValueError):
+        return None
+
+
+def get_public_ip() -> ipaddress.IPv4Address:
+    """Get the user's current public IPv4 address."""
+    ip_address: str = requests.get("https://api.ipify.org", timeout=10).text
+    return ipaddress.IPv4Address(ip_address)