Enhancements: Upgraded Actions, Improved Logging, Restructured Project (#1)

* update python project use setup tools, and upgrade github action version

* add manual run trigger

* add check not found check

* remove TODO as not possible

* Update doc and add default value of non required config

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Co-authored-by: Snigdhajyoti Ghosh <snigdhasjg@users.noreply.github.com>

docker_nsupdate_ddns/lib/nsupdate.py

@@ -0,0 +1,44 @@
+import logging
+
+import dns.update
+import dns.query
+import dns.tsigkeyring
+import ipaddress
+
+config = {}
+
+LOG = logging.getLogger(__name__)
+
+
+def add_records(records):
+    keyring = dns.tsigkeyring.from_text({config['TSIG_NAME']: config['TSIG_KEY']})
+
+    for hostname, ip in records.items():
+        LOG.info(f"Adding record for {hostname}({ip})")
+
+        rrtype = "A"
+        address = ipaddress.ip_address(ip)
+        if isinstance(address, ipaddress.IPv4Address):
+            rrtype = "A"
+        if isinstance(address, ipaddress.IPv6Address):
+            rrtype = "AAAA"
+
+        update = dns.update.Update(config['DOMAIN'], keyring=keyring)
+        update.add(hostname, int(config['DNS_RECORD_TTL']), rrtype, ip)
+        dns.query.tcp(update, config['NAMESERVER'], timeout=2)
+
+
+def delete_records(records):
+    keyring = dns.tsigkeyring.from_text({config['TSIG_NAME']: config['TSIG_KEY']})
+
+    for hostname, ip in records.items():
+        LOG.info(f"Deleting record for {hostname}({ip})")
+
+        update = dns.update.Update(config['DOMAIN'], keyring=keyring)
+        update.delete(hostname)
+        dns.query.tcp(update, config['NAMESERVER'], timeout=2)
+
+
+def init(_config):
+    global config
+    config = _config