FastapiAdmin/backend/app/api/v1/module_system/menu/service.py

# -*- coding: utf-8 -*-

from typing import List, Dict, Optional

from app.core.base_schema import BatchSetAvailable
from app.core.exceptions import CustomException
from app.utils.common_util import (
    get_parent_id_map,
    get_parent_recursion,
    get_child_id_map,
    get_child_recursion,
    traversal_to_tree
)
from ..auth.schema import AuthSchema
from .param import MenuQueryParam
from .crud import MenuCRUD
from .schema import (
    MenuCreateSchema,
    MenuUpdateSchema,
    MenuOutSchema
)


class MenuService:
    """
    菜单模块服务层
    """

    @classmethod
    async def get_menu_detail_service(cls, auth: AuthSchema, id: int) -> Dict:
        menu = await MenuCRUD(auth).get_by_id_crud(id=id)
        menu_dict = MenuOutSchema.model_validate(menu).model_dump()
        return menu_dict

    @classmethod
    async def get_menu_tree_service(cls, auth: AuthSchema, search: Optional[MenuQueryParam] = None, order_by: Optional[List[Dict]] = None) -> List[Dict]:
        """
        获取菜单树形列表service
        
        :param auth: 认证对象
        :param search: 查询参数对象
        :param order_by: 排序参数
        :return: 菜单树形列表对象
        """
        # 使用树形结构查询，预加载children关系
        menu_list = await MenuCRUD(auth).get_tree_list_crud(search=search.__dict__, order_by=order_by)
        # 转换为字典列表
        menu_dict_list = [MenuOutSchema.model_validate(menu).model_dump() for menu in menu_list]
        # 使用traversal_to_tree构建树形结构
        return traversal_to_tree(menu_dict_list)

    @classmethod
    async def create_menu_service(cls, auth: AuthSchema, data: MenuCreateSchema) -> Dict:
        menu = await MenuCRUD(auth).get(name=data.name)
        if menu:
            raise CustomException(msg='创建失败，该菜单已存在')

        new_menu = await MenuCRUD(auth).create(data=data)
        new_menu_dict = MenuOutSchema.model_validate(new_menu).model_dump()
        return new_menu_dict

    @classmethod
    async def update_menu_service(cls, auth: AuthSchema,id:int, data: MenuUpdateSchema) -> Dict:
        menu = await MenuCRUD(auth).get_by_id_crud(id=id)
        if not menu:
            raise CustomException(msg='更新失败，该菜单不存在')
        exist_menu = await MenuCRUD(auth).get(name=data.name)
        if exist_menu and exist_menu.id != id:
            raise CustomException(msg='更新失败，菜单名称重复')
        
        if data.parent_id:
            parent_menu = await MenuCRUD(auth).get_by_id_crud(id=data.parent_id)
            if not parent_menu:
                raise CustomException(msg='更新失败，父级菜单不存在')
            data.parent_name = parent_menu.name
        new_menu = await MenuCRUD(auth).update(id=id, data=data)
        
        await cls.set_menu_available_service(auth=auth, data=BatchSetAvailable(ids=[id], status=data.status))
        
        new_menu_dict = MenuOutSchema.model_validate(new_menu).model_dump()
        return new_menu_dict
    
    @classmethod
    async def delete_menu_service(cls, auth: AuthSchema, ids: list[int]) -> None:
        if len(ids) < 1:
            raise CustomException(msg='删除失败，删除对象不能为空')
        for id in ids:
            menu = await MenuCRUD(auth).get_by_id_crud(id=id)
            if not menu:
                raise CustomException(msg='删除失败，该菜单不存在')
        await MenuCRUD(auth).delete(ids=ids)

    @classmethod
    async def set_menu_available_service(cls, auth: AuthSchema, data: BatchSetAvailable) -> None:
        """
        递归获取所有父、子级菜单，然后批量修改菜单可用状态
        """
        menu_list = await MenuCRUD(auth).get_list_crud()
        total_ids = []
        
        if data.status:
            # 激活，则需要把所有父级菜单都激活
            id_map = get_parent_id_map(model_list=menu_list)
            for menu_id in data.ids:
                enable_ids = get_parent_recursion(id=menu_id, id_map=id_map)
                total_ids.extend(enable_ids)
        else:
            # 禁止，则需要把所有子级菜单都禁止
            id_map = get_child_id_map(model_list=menu_list)
            for menu_id in data.ids:
                disable_ids = get_child_recursion(id=menu_id, id_map=id_map)
                total_ids.extend(disable_ids)

        await MenuCRUD(auth).set_available_crud(ids=total_ids, status=data.status)