from typing import Any from fastapi import UploadFile from sqlalchemy.ext.asyncio import AsyncSession from app.core.base_schema import AuthSchema, BatchSetAvailable, PageResultSchema from app.core.exceptions import CustomException from app.core.logger import logger from app.utils.common_util import search_to_dict from app.utils.excel_util import ExcelUtil from .crud import DemoCRUD from .schema import ( DemoCreateSchema, DemoOutSchema, DemoQueryParam, DemoUpdateSchema, ) class DemoService: """示例管理模块服务层""" def __init__(self, auth: AuthSchema, db: AsyncSession) -> None: self.auth = auth self.db = db async def detail(self, id: int) -> DemoOutSchema: obj = await DemoCRUD(self.auth, self.db).get(id=id) if not obj: raise CustomException(msg="该数据不存在") return DemoOutSchema.model_validate(obj) async def get_list( self, search: DemoQueryParam | None = None, order_by: list[dict[str, str]] | None = None, ) -> list[DemoOutSchema]: obj_list = await DemoCRUD(self.auth, self.db).get_list(search=search_to_dict(search), order_by=order_by) return [DemoOutSchema.model_validate(obj) for obj in obj_list] async def page( self, page_no: int, page_size: int, search: DemoQueryParam | None = None, order_by: list[dict[str, str]] | None = None, ) -> PageResultSchema[DemoOutSchema]: offset = (page_no - 1) * page_size return await DemoCRUD(self.auth, self.db).page( offset=offset, limit=page_size, order_by=order_by or [{"id": "asc"}], search=search_to_dict(search, {}), out_schema=DemoOutSchema, ) async def create(self, data: DemoCreateSchema) -> DemoOutSchema: obj = await DemoCRUD(self.auth, self.db).get(name=data.name) if obj: raise CustomException(msg="创建失败，名称已存在") obj = await DemoCRUD(self.auth, self.db).create(data=data) return DemoOutSchema.model_validate(obj) async def update(self, id: int, data: DemoUpdateSchema) -> DemoOutSchema: obj = await DemoCRUD(self.auth, self.db).get(id=id) if not obj: raise CustomException(msg="更新失败，该数据不存在") exist_obj = await DemoCRUD(self.auth, self.db).get(name=data.name) if exist_obj and exist_obj.id != id: raise CustomException(msg="更新失败，名称重复") obj = await DemoCRUD(self.auth, self.db).update(id=id, data=data) return DemoOutSchema.model_validate(obj) async def delete(self, ids: list[int]) -> None: if not ids: raise CustomException(msg="删除失败，删除对象不能为空") objs = await DemoCRUD(self.auth, self.db).get_list(search={"id": ("in", ids)}) obj_map = {o.id: o for o in objs} for id_ in ids: if id_ not in obj_map: raise CustomException(msg="删除失败，该数据不存在") await DemoCRUD(self.auth, self.db).delete(ids=ids) async def set_available(self, data: BatchSetAvailable) -> None: await DemoCRUD(self.auth, self.db).set(ids=data.ids, status=data.status) @staticmethod def batch_export(obj_list: list[dict[str, Any]]) -> bytes: mapping_dict = { "id": "编号", "name": "名称", "status": "状态", "description": "备注", "created_time": "创建时间", "updated_time": "更新时间", "created_id": "创建者", } data = obj_list.copy() for item in data: item["status"] = "启用" if item.get("status") == 0 else "停用" creator_info = item.get("created_id") if isinstance(creator_info, dict): item["created_id"] = creator_info.get("name", "未知") else: item["created_id"] = "未知" return ExcelUtil.export_list2excel(list_data=data, mapping_dict=mapping_dict) async def batch_import(self, file: UploadFile, update_support: bool = False) -> str: header_dict = {"名称": "name", "状态": "status", "描述": "description"} try: contents = await file.read() rows = ExcelUtil.read_excel_to_dicts(contents) await file.close() if not rows: raise CustomException(msg="导入文件为空") missing_headers = [h for h in header_dict if h not in rows[0]] if missing_headers: raise CustomException(msg=f"导入文件缺少必要的列: {', '.join(missing_headers)}") # 将中文字段名映射为英文字段 mapped_rows = [] for row in rows: mapped_rows.append({en: row.get(ch) for ch, en in header_dict.items()}) required_fields = ["name", "status"] errors = [] for field in required_fields: missing_indices = [i + 1 for i, r in enumerate(mapped_rows) if r.get(field) is None] if missing_indices: field_name = next(k for k, v in header_dict.items() if v == field) rows_str = "、".join(str(i) for i in missing_indices) errors.append(f"{field_name}不能为空，第{rows_str}行") if errors: raise CustomException(msg=f"导入失败，以下行缺少必要字段：\n{'; '.join(errors)}") error_msgs = [] success_count = 0 for i, row in enumerate(mapped_rows, start=1): try: status_str = str(row["status"]).strip() if status_str == "正常": status = 0 elif status_str == "停用": status = 1 else: error_msgs.append(f"第{i}行: 状态必须是'正常'或'停用'") continue create_data = DemoCreateSchema( name=str(row["name"]), status=status, description=str(row["description"] or ""), ) exists_obj = await DemoCRUD(self.auth, self.db).get(name=create_data.name) if exists_obj: if update_support: update_data = DemoUpdateSchema( name=create_data.name, status=create_data.status, description=create_data.description, ) await DemoCRUD(self.auth, self.db).update(id=exists_obj.id, data=update_data) success_count += 1 else: error_msgs.append(f"第{i}行: 对象 {create_data.name} 已存在") else: await DemoCRUD(self.auth, self.db).create(data=create_data) success_count += 1 except Exception as e: error_msgs.append(f"第{i}行: {e!s}") continue result = f"成功导入 {success_count} 条数据" if error_msgs: result += "\n错误信息:\n" + "\n".join(error_msgs) return result except Exception as e: logger.error(f"批量导入用户失败: {e!s}") raise CustomException(msg=f"导入失败: {e!s}") @staticmethod def import_template_download() -> bytes: header_list = ["名称", "状态", "描述"] selector_header_list = ["状态"] option_list = [{"状态": ["正常", "停用"]}] return ExcelUtil.get_excel_template( header_list=header_list, selector_header_list=selector_header_list, option_list=option_list, )