1.9

backend/app/services/draft_service.py

@@ -0,0 +1,26 @@
+"""草稿服务（Redis 存储，零迁移）"""
+
+import redis.asyncio as aioredis
+from app.config import settings
+
+
+class DraftService:
+    def __init__(self):
+        self._redis = None
+
+    async def _get_redis(self):
+        if self._redis is None:
+            self._redis = aioredis.from_url(settings.REDIS_URL, decode_responses=True)
+        return self._redis
+
+    async def get(self, user_id: str, conv_id: str) -> str:
+        r = await self._get_redis()
+        return await r.get(f"draft:{user_id}:{conv_id}") or ""
+
+    async def set(self, user_id: str, conv_id: str, text: str):
+        r = await self._get_redis()
+        key = f"draft:{user_id}:{conv_id}"
+        if text:
+            await r.set(key, text, ex=30 * 86400)  # 30 天 TTL
+        else:
+            await r.delete(key)