Use generated short id for llm asr tts

api/app/id_generator.py

@@ -0,0 +1,17 @@
+import uuid
+from typing import Any, Type
+
+from sqlalchemy.orm import Session
+
+
+def short_id(prefix: str, size: int = 8) -> str:
+    return f"{prefix}_{uuid.uuid4().hex[:size]}"
+
+
+def unique_short_id(prefix: str, db: Session, model_cls: Type[Any], size: int = 8) -> str:
+    for _ in range(10):
+        candidate = short_id(prefix, size=size)
+        exists = db.query(model_cls.id).filter(model_cls.id == candidate).first()
+        if not exists:
+            return candidate
+    raise RuntimeError(f"failed to generate unique id for {model_cls.__name__}")