@tplc/business/components/lcb-area-picker/api/index.ts

// /api/provinces/provinceCityArea
export interface ProvinceCityArea {
  cityList: CityList[]
  provinceId: string
  provinceName: string
}

interface CityList {
  areaList?: AreaList[]
  cityId: string
  cityName: string
  provinceId: string
}

interface AreaList {
  areaId: string
  areaName: string
  cityId: string
  provinceId: string
}
export interface AreaOptions {
  label: string
  value: string
  children?: AreaOptions[]
}
export const getProvinceCityArea = async () => {
  const { data } = await uni.$lcb.http.post<ProvinceCityArea[]>('/provinces/provinceCityArea')
  return data.map(({ provinceId, provinceName, cityList }) => {
    return {
      label: provinceName,
      value: provinceId,
      children: cityList.map(({ cityId, cityName, areaList }) => {
        return {
          label: cityName,
          value: cityId,
          children: areaList?.map(({ areaId, areaName }) => {
            return {
              label: areaName,
              value: areaId,
            }
          }),
        }
      }),
    }
  })
}

export const getProvinceCity = async () => {
  const { data } = await uni.$lcb.http.post<ProvinceCityArea[]>('/provinces/provinceCityArea')
  return data.map(({ provinceId, provinceName, cityList }) => {
    return {
      label: provinceName,
      value: provinceId,
      children: cityList.map(({ cityId, cityName }) => {
        return {
          label: cityName,
          value: cityId,
        }
      }),
    }
  })
}