refactor: extract app log SQL queries to Service and Repository layers

api/app/services/app_log_service.py

@@ -0,0 +1,128 @@
+"""应用日志服务层"""
+import uuid
+from typing import Optional, Tuple
+from datetime import datetime
+
+from sqlalchemy.orm import Session
+
+from app.core.logging_config import get_business_logger
+from app.models.conversation_model import Conversation, Message
+from app.repositories.conversation_repository import ConversationRepository, MessageRepository
+
+logger = get_business_logger()
+
+
+class AppLogService:
+    """应用日志服务"""
+
+    def __init__(self, db: Session):
+        self.db = db
+        self.conversation_repository = ConversationRepository(db)
+        self.message_repository = MessageRepository(db)
+
+    def list_conversations(
+        self,
+        app_id: uuid.UUID,
+        workspace_id: uuid.UUID,
+        page: int = 1,
+        pagesize: int = 20,
+        is_draft: Optional[bool] = None,
+    ) -> Tuple[list[Conversation], int]:
+        """
+        查询应用日志会话列表
+
+        Args:
+            app_id: 应用 ID
+            workspace_id: 工作空间 ID
+            page: 页码（从 1 开始）
+            pagesize: 每页数量
+            is_draft: 是否草稿会话（None 表示不过滤）
+
+        Returns:
+            Tuple[list[Conversation], int]: (会话列表，总数)
+        """
+        logger.info(
+            "查询应用日志会话列表",
+            extra={
+                "app_id": str(app_id),
+                "workspace_id": str(workspace_id),
+                "page": page,
+                "pagesize": pagesize,
+                "is_draft": is_draft
+            }
+        )
+
+        # 使用 Repository 查询
+        conversations, total = self.conversation_repository.list_app_conversations(
+            app_id=app_id,
+            workspace_id=workspace_id,
+            is_draft=is_draft,
+            page=page,
+            pagesize=pagesize
+        )
+
+        logger.info(
+            "查询应用日志会话列表成功",
+            extra={
+                "app_id": str(app_id),
+                "total": total,
+                "returned": len(conversations)
+            }
+        )
+
+        return conversations, total
+
+    def get_conversation_detail(
+        self,
+        app_id: uuid.UUID,
+        conversation_id: uuid.UUID,
+        workspace_id: uuid.UUID
+    ) -> Conversation:
+        """
+        查询会话详情（包含消息）
+
+        Args:
+            app_id: 应用 ID
+            conversation_id: 会话 ID
+            workspace_id: 工作空间 ID
+
+        Returns:
+            Conversation: 包含消息的会话对象
+
+        Raises:
+            ResourceNotFoundException: 当会话不存在时
+        """
+        logger.info(
+            "查询应用日志会话详情",
+            extra={
+                "app_id": str(app_id),
+                "conversation_id": str(conversation_id),
+                "workspace_id": str(workspace_id)
+            }
+        )
+
+        # 查询会话
+        conversation = self.conversation_repository.get_conversation_for_app_log(
+            conversation_id=conversation_id,
+            app_id=app_id,
+            workspace_id=workspace_id
+        )
+
+        # 查询消息（按时间正序）
+        messages = self.message_repository.get_messages_by_conversation(
+            conversation_id=conversation_id
+        )
+
+        # 将消息附加到会话对象
+        conversation.messages = messages
+
+        logger.info(
+            "查询应用日志会话详情成功",
+            extra={
+                "app_id": str(app_id),
+                "conversation_id": str(conversation_id),
+                "message_count": len(messages)
+            }
+        )
+
+        return conversation