update:强化小智提示词

main/xiaozhi-server/core/utils/cache/strategies.py

@@ -0,0 +1,43 @@
+"""
+缓存策略和数据结构定义
+"""
+
+import time
+from enum import Enum
+from typing import Any, Optional
+from dataclasses import dataclass
+
+
+class CacheStrategy(Enum):
+    """缓存策略枚举"""
+
+    TTL = "ttl"  # 基于时间过期
+    LRU = "lru"  # 最近最少使用
+    FIXED_SIZE = "fixed_size"  # 固定大小
+    TTL_LRU = "ttl_lru"  # TTL + LRU混合策略
+
+
+@dataclass
+class CacheEntry:
+    """缓存条目数据结构"""
+
+    value: Any
+    timestamp: float
+    ttl: Optional[float] = None  # 生存时间（秒）
+    access_count: int = 0
+    last_access: float = None
+
+    def __post_init__(self):
+        if self.last_access is None:
+            self.last_access = self.timestamp
+
+    def is_expired(self) -> bool:
+        """检查是否过期"""
+        if self.ttl is None:
+            return False
+        return time.time() - self.timestamp > self.ttl
+
+    def touch(self):
+        """更新访问时间和计数"""
+        self.last_access = time.time()
+        self.access_count += 1