feat: log line preprocessing (ts strip + router/child classify)

log_parser.py

@@ -0,0 +1,26 @@
+import re
+import json
+from dataclasses import dataclass, field, asdict
+from datetime import datetime
+from typing import Optional
+
+# ── Preprocessing ────────────────────────────────────────────────────────────
+
+_TS_RE = re.compile(r'^\[\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}\]\s*')
+_CHILD_RE = re.compile(r'^\[(\d+)\]\s*')
+
+
+def strip_ts(line: str) -> str:
+    """Remove optional `ts`-injected timestamp prefix from a log line."""
+    return _TS_RE.sub('', line.strip())
+
+
+def classify_line(line: str) -> tuple[str, Optional[int], str]:
+    """
+    Return (kind, port, content) where kind is 'router' or 'child'.
+    `line` must already have the ts prefix stripped.
+    """
+    m = _CHILD_RE.match(line)
+    if m:
+        return ('child', int(m.group(1)), line[m.end():])
+    return ('router', None, line)