Refactor bot and integrate services

lock_utils.py

@@ -0,0 +1,23 @@
+from pathlib import Path
+import time
+
+LOCK_DIR = Path("/var/run/tg-bot")
+LOCK_DIR.mkdir(parents=True, exist_ok=True)
+
+
+def lock_path(name: str) -> Path:
+    return LOCK_DIR / f"{name}.lock"
+
+
+def acquire_lock(name: str) -> bool:
+    p = lock_path(name)
+    if p.exists():
+        return False
+    p.write_text(str(time.time()))
+    return True
+
+
+def release_lock(name: str):
+    p = lock_path(name)
+    if p.exists():
+        p.unlink()