Update app.py

app.py

@@ -170,19 +170,40 @@ def generate_world_save_filename(username="User", world_name="World"):
     return f"{WORLD_STATE_FILE_MD_PREFIX}{clean_world}_by_{clean_user}_{timestamp}_{rand_hash}.md"
 
 def parse_world_filename(filename):
+    """Extracts info from filename if possible, otherwise returns defaults."""
     basename = os.path.basename(filename)
+    # Check prefix and suffix
     if basename.startswith(WORLD_STATE_FILE_MD_PREFIX) and basename.endswith(".md"):
-        core = basename[len(WORLD_STATE_FILE_MD_PREFIX):-3]; parts = core.split('_')
+        core_name = basename[len(WORLD_STATE_FILE_MD_PREFIX):-3]
+        parts = core_name.split('_')
+        # Check if structure matches Name_by_User_Timestamp_Hash
         if len(parts) >= 5 and parts[-3] == "by":
-            timestamp_str = parts[-2]; username = parts[-4]; world_name = " ".join(parts[:-4]); dt_obj = None
-            try: dt_obj = pytz.utc.localize(datetime.strptime(timestamp_str, '%Y%m%d_%H%M%S'))
-            except Exception: dt_obj = None
+            timestamp_str = parts[-2]
+            username = parts[-4]
+            world_name = " ".join(parts[:-4]) # Join potential name parts
+            dt_obj = None
+            try: # Try parsing timestamp
+                dt_obj = datetime.strptime(timestamp_str, '%Y%m%d_%H%M%S')
+                dt_obj = pytz.utc.localize(dt_obj) # Assume UTC
+            except (ValueError, pytz.exceptions.AmbiguousTimeError, pytz.exceptions.NonExistentTimeError):
+                dt_obj = None # Parsing failed
+            # Return result if standard format parsed okay
             return {"name": world_name or "Untitled", "user": username, "timestamp": timestamp_str, "dt": dt_obj, "filename": filename}
-    # Fallback
-    dt_fallback = None; try: mtime = os.path.getmtime(filename); dt_fallback = datetime.fromtimestamp(mtime, tz=pytz.utc)
-    except Exception: pass
+
+    # Fallback for unknown format or if parsing above failed
+    # print(f"Using fallback parsing for filename: {basename}") # Debug log
+    dt_fallback = None # Initialize on its own line
+    try: # Start try block on its own line
+        # Indented block under try
+        mtime = os.path.getmtime(filename)
+        dt_fallback = datetime.fromtimestamp(mtime, tz=pytz.utc)
+    except Exception: # Except aligned with try
+        # Indented block under except
+        pass # Ignore errors getting mtime
+    # Return statement aligned with the function's fallback logic scope
     return {"name": basename.replace('.md','').replace(WORLD_STATE_FILE_MD_PREFIX, ''), "user": "Unknown", "timestamp": "Unknown", "dt": dt_fallback, "filename": filename}
 
+    
 
 def save_world_state_to_md(target_filename_base):
     """Saves the current cached world state to a specific MD file."""