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routlin/mod_dns_queries.py

@@ -8,7 +8,7 @@ Called by:
   - maintenance.py  on each timer tick
   - routlin-dash overview page  on each page load (background thread)
 
-Only VLANs with dnsmasq_log_queries=true are collected.
+Only VLANs with dnsmasq_log_queries_days > 0 are collected.
 """
 
 import json
@@ -84,7 +84,7 @@ def collect(data):
     """
     unit_to_vlan = {}
     for vlan in data.get('vlans', []):
-        if not vlan.get('dnsmasq_log_queries'):
+        if not vlan.get('dnsmasq_log_queries_days', 0):
             continue
         iface = validation.derive_interface(vlan, data)
         svc   = shared.vlan_service_name(vlan, iface)
@@ -180,3 +180,26 @@ def collect(data):
     shared.chown_to_script_dir_owner(DB_FILE)
     con.close()
     return len(rows)
+
+
+def prune(data):
+    """
+    Delete dns_queries rows older than the retention period configured per VLAN.
+    Uses the maximum retention days across all logging-enabled VLANs.
+    Returns the number of rows deleted.
+    """
+    days = max(
+        (v.get('dnsmasq_log_queries_days', 0) for v in data.get('vlans', [])),
+        default=0
+    )
+    if not days:
+        return 0
+    if not DB_FILE.exists():
+        return 0
+    cutoff = int(__import__('time').time()) - days * 86400
+    con = open_db()
+    cur = con.execute('DELETE FROM dns_queries WHERE ts < ?', (cutoff,))
+    deleted = cur.rowcount
+    con.commit()
+    con.close()
+    return deleted