more chnages

app/template_logger.py

@@ -0,0 +1,48 @@
+"""
+Simple run-scoped logger for the template generator.
+
+The log file under logs/ is erased and recreated at the start of every run
+(see reset_log()) so it only ever reflects the most recent generation.
+"""
+
+import datetime
+import os
+
+ROOT_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+LOGS_DIR = os.path.join(ROOT_DIR, "logs")
+LOG_FILE = os.path.join(LOGS_DIR, "template_generator.log")
+
+_log_path = None
+
+
+def reset_log():
+    """Erases any previous log and starts a fresh one for this run."""
+    global _log_path
+    os.makedirs(LOGS_DIR, exist_ok=True)
+    _log_path = LOG_FILE
+    with open(_log_path, "w", encoding="utf-8") as f:
+        f.write(f"Timetable generation log - started {datetime.datetime.now().isoformat()}\n")
+        f.write("=" * 80 + "\n")
+    return _log_path
+
+
+def log_error(message):
+    """Appends an ERROR line to the current run's log file and prints it."""
+    _write("ERROR", message)
+
+
+def log_warning(message):
+    _write("WARNING", message)
+
+
+def log_info(message):
+    _write("INFO", message)
+
+
+def _write(level, message):
+    if _log_path is None:
+        reset_log()
+    line = f"[{datetime.datetime.now().strftime('%H:%M:%S')}] {level}: {message}"
+    with open(_log_path, "a", encoding="utf-8") as f:
+        f.write(line + "\n")
+    print(line)