using Infrastructure.Attribute;
using Infrastructure.Extensions;
using ZR.LiveForum.Model.Liveforum.Dto;
using ZR.LiveForum.Model.Liveforum;
using ZR.Repository;
using ZR.Service.Liveforum.ILiveforumService;

namespace ZR.Service.Liveforum
{
    /// <summary>
    /// 系统公告Service业务层处理
    /// </summary>
    [AppService(ServiceType = typeof(IT_SystemNotificationsService), ServiceLifetime = LifeTime.Transient)]
    public class T_SystemNotificationsService : BaseService<T_SystemNotifications>, IT_SystemNotificationsService
    {
        /// <summary>
        /// 查询系统公告列表
        /// </summary>
        /// <param name="parm"></param>
        /// <returns></returns>
        public PagedInfo<T_SystemNotificationsDto> GetList(T_SystemNotificationsQueryDto parm)
        {
            var predicate = QueryExp(parm);

            var response = Queryable()
                //.OrderBy("Id desc")
                .Where(predicate.ToExpression())
                .ToPage<T_SystemNotifications, T_SystemNotificationsDto>(parm);

            return response;
        }


        /// <summary>
        /// 获取详情
        /// </summary>
        /// <param name="Id"></param>
        /// <returns></returns>
        public T_SystemNotifications GetInfo(long Id)
        {
            var response = Queryable()
                .Where(x => x.Id == Id)
                .First();

            return response;
        }

        /// <summary>
        /// 添加系统公告
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public T_SystemNotifications AddT_SystemNotifications(T_SystemNotifications model)
        {
            return Insertable(model).ExecuteReturnEntity();
        }

        /// <summary>
        /// 修改系统公告
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public int UpdateT_SystemNotifications(T_SystemNotifications model)
        {
            return Update(model, true);
        }

        /// <summary>
        /// 查询导出表达式
        /// </summary>
        /// <param name="parm"></param>
        /// <returns></returns>
        private static Expressionable<T_SystemNotifications> QueryExp(T_SystemNotificationsQueryDto parm)
        {
            var predicate = Expressionable.Create<T_SystemNotifications>();

            predicate = predicate.AndIF(!string.IsNullOrEmpty(parm.Title), it => it.Title.Contains(parm.Title));
            return predicate;
        }
    }
}