Prepare KarlDNS production deployment

karldns/models.py

@@ -0,0 +1,18 @@
+from __future__ import annotations
+
+from dataclasses import dataclass
+
+
+@dataclass(slots=True)
+class UpdateResult:
+    hostname: str
+    ipv4: str | None
+    ipv6: str | None
+    changed: bool
+    update_ipv4: bool = True
+    update_ipv6: bool = True
+
+    @property
+    def dyndns_response(self) -> str:
+        ip = self.ipv4 or self.ipv6 or "0.0.0.0"
+        return f"{'good' if self.changed else 'nochg'} {ip}"