feat: 初始提交

backend/app/services/config_service.py

@@ -0,0 +1,49 @@
+from typing import Iterable, Optional
+
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from ..repositories.system_config_repository import SystemConfigRepository
+from ..models import SystemConfig
+from ..schemas.config import SystemConfigCreate, SystemConfigRead, SystemConfigUpdate
+
+
+class ConfigService:
+    """系统配置服务：提供 CRUD 接口，并负责转换 Pydantic 模型。"""
+
+    def __init__(self, session: AsyncSession):
+        self.session = session
+        self.repo = SystemConfigRepository(session)
+
+    async def list_configs(self) -> list[SystemConfigRead]:
+        configs = await self.repo.list_all()
+        return [SystemConfigRead.model_validate(cfg) for cfg in configs]
+
+    async def get_config(self, key: str) -> Optional[SystemConfigRead]:
+        config = await self.repo.get_by_key(key)
+        return SystemConfigRead.model_validate(config) if config else None
+
+    async def upsert_config(self, payload: SystemConfigCreate) -> SystemConfigRead:
+        instance = await self.repo.get_by_key(payload.key)
+        if instance:
+            await self.repo.update_fields(instance, value=payload.value, description=payload.description)
+        else:
+            instance = SystemConfig(**payload.model_dump())
+            await self.repo.add(instance)
+        await self.session.commit()
+        return SystemConfigRead.model_validate(instance)
+
+    async def patch_config(self, key: str, payload: SystemConfigUpdate) -> Optional[SystemConfigRead]:
+        instance = await self.repo.get_by_key(key)
+        if not instance:
+            return None
+        await self.repo.update_fields(instance, **payload.model_dump(exclude_unset=True))
+        await self.session.commit()
+        return SystemConfigRead.model_validate(instance)
+
+    async def remove_config(self, key: str) -> bool:
+        instance = await self.repo.get_by_key(key)
+        if not instance:
+            return False
+        await self.repo.delete(instance)
+        await self.session.commit()
+        return True