feat: 添加utils工具模块

- 新增logger.py统一日志管理
- 新增validators.py数据验证模型
- 配置utils包的__init__.py导入接口
- 为模块化架构提供基础工具支持

utils/__init__.py

@@ -0,0 +1,20 @@
+"""
+provide a unified interface for logging and data validation
+
+"""
+
+from .logger import log, setup_logger
+
+# import data validation classes
+from .validators import ChatRequest, ChatResponse
+
+# define the __all__ variable to control what is imported when using 'from module import *'
+__all__ = [
+    'log',
+    'setup_logger', 
+    'ChatRequest',
+    'ChatResponse'
+]
+
+# version information
+__version__ = '1.0.0'

utils/logger.py

@@ -0,0 +1,36 @@
+import logging
+import sys
+
+
+def setup_logger():
+    """Set up a logger for the application."""
+    logger = logging.getLogger("TravelAssistant")
+    logger.setLevel(logging.INFO)
+
+    # avoid duplicate handlers
+    if logger.hasHandlers():
+        logger.handlers.clear()
+
+    # 创建一个 handler，用于写入日志文件
+    # file_handler = logging.FileHandler("app.log")
+    # file_handler.setLevel(logging.INFO)
+
+    # 创建一个 handler，用于输出到控制台
+    stream_handler = logging.StreamHandler(sys.stdout)
+    stream_handler.setLevel(logging.INFO)
+
+    # 定义 handler 的输出格式
+    formatter = logging.Formatter(
+        '%(asctime)s - %(name)s - %(levelname)s - %(message)s'
+    )
+    # file_handler.setFormatter(formatter)
+    stream_handler.setFormatter(formatter)
+
+    # 给 logger 添加 handler
+    # logger.addHandler(file_handler)
+    logger.addHandler(stream_handler)
+
+    return logger
+
+# 创建一个实例供其他模块导入
+log = setup_logger()

utils/validators.py

@@ -0,0 +1,14 @@
+# utils/validators.py
+from pydantic import BaseModel
+from typing import List, Optional
+
+class ChatRequest(BaseModel):
+    message: str
+    session_id: Optional[str] = None
+    history: Optional[List[List[str]]] = []
+
+class ChatResponse(BaseModel):
+    reply: str
+    session_id: str
+    status_info: str
+    history: List[List[str]]