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cmdnat/adjective.py

@@ -1,7 +1,7 @@
 import json
 import os
 import sys
-from typing import List, Dict, Any, Sequence
+from typing import List, Dict, Any, Sequence, Optional
 from SYS.cmdlet_spec import Cmdlet, CmdletArg
 from SYS.logger import log
 from SYS.result_table import Table
@@ -12,22 +12,45 @@ ADJECTIVE_FILE = os.path.join(
     "cmdnat",
     "adjective.json"
 )
+_ADJECTIVE_CACHE: Optional[Dict[str, List[str]]] = None
+_ADJECTIVE_CACHE_MTIME_NS: Optional[int] = None
 
 
 def _load_adjectives() -> Dict[str, List[str]]:
+    global _ADJECTIVE_CACHE, _ADJECTIVE_CACHE_MTIME_NS
     try:
-        if os.path.exists(ADJECTIVE_FILE):
-            with open(ADJECTIVE_FILE, "r", encoding="utf-8") as f:
-                return json.load(f)
+        if not os.path.exists(ADJECTIVE_FILE):
+            _ADJECTIVE_CACHE = {}
+            _ADJECTIVE_CACHE_MTIME_NS = None
+            return {}
+
+        current_mtime_ns = os.stat(ADJECTIVE_FILE).st_mtime_ns
+        if (_ADJECTIVE_CACHE is not None and
+                _ADJECTIVE_CACHE_MTIME_NS == current_mtime_ns):
+            return _ADJECTIVE_CACHE
+
+        with open(ADJECTIVE_FILE, "r", encoding="utf-8") as f:
+            loaded = json.load(f)
+        if not isinstance(loaded, dict):
+            loaded = {}
+
+        _ADJECTIVE_CACHE = loaded
+        _ADJECTIVE_CACHE_MTIME_NS = current_mtime_ns
+        return _ADJECTIVE_CACHE
     except Exception as e:
         log(f"Error loading adjectives: {e}", file=sys.stderr)
+    _ADJECTIVE_CACHE = {}
+    _ADJECTIVE_CACHE_MTIME_NS = None
     return {}
 
 
 def _save_adjectives(data: Dict[str, List[str]]) -> bool:
+    global _ADJECTIVE_CACHE, _ADJECTIVE_CACHE_MTIME_NS
     try:
         with open(ADJECTIVE_FILE, "w", encoding="utf-8") as f:
             json.dump(data, f, indent=2)
+        _ADJECTIVE_CACHE = data
+        _ADJECTIVE_CACHE_MTIME_NS = os.stat(ADJECTIVE_FILE).st_mtime_ns
         return True
     except Exception as e:
         log(f"Error saving adjectives: {e}", file=sys.stderr)