128 lines
4.4 KiB
C#
128 lines
4.4 KiB
C#
using Infrastructure.Attribute;
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using Infrastructure.Extensions;
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using ZR.LiveForum.Model.Liveforum.Dto;
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using ZR.LiveForum.Model.Liveforum;
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using ZR.Repository;
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using ZR.Service.Liveforum.ILiveforumService;
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namespace ZR.Service.Liveforum
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{
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/// <summary>
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/// 帖子评论记录Service业务层处理
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/// </summary>
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[AppService(ServiceType = typeof(IT_CommentsService), ServiceLifetime = LifeTime.Transient)]
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public class T_CommentsService : BaseService<T_Comments>, IT_CommentsService
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{
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/// <summary>
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/// 查询帖子评论记录列表
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/// </summary>
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/// <param name="parm"></param>
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/// <returns></returns>
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public PagedInfo<T_CommentsDto> GetList(T_CommentsQueryDto parm)
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{
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var predicate = QueryExp(parm);
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var query = Queryable()
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.Where(predicate.ToExpression())
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.LeftJoin<T_Users>((c, u) => c.UserId == u.Id)
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.LeftJoin<T_Users>((c, u, ru) => c.ReplyToUserId == ru.Id)
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.LeftJoin<T_Posts>((c, u, ru, p) => c.PostId == p.Id)
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.LeftJoin<T_Comments>((c, u, ru, p, pc) => c.ParentCommentId == pc.Id);
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// 排序：顶级评论在前，回复评论在后，同层级按创建时间倒序
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// 使用多个OrderBy组合排序
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query = query.OrderBy((c, u, ru, p, pc) => c.ParentCommentId == null ? 0 : 1, OrderByType.Asc)
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.OrderBy((c, u, ru, p, pc) => c.CreatedAt, OrderByType.Desc);
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var response = query.Select((c, u, ru, p, pc) => new T_CommentsDto()
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{
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Id = c.Id,
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PostId = c.PostId,
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UserId = c.UserId,
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ParentCommentId = c.ParentCommentId,
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ReplyToUserId = c.ReplyToUserId,
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Content = c.Content,
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LikeCount = c.LikeCount,
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ReplyCount = c.ReplyCount,
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Status = c.Status,
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IpAddress = c.IpAddress,
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CreatedAt = c.CreatedAt,
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UpdatedAt = c.UpdatedAt,
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IsDeleted = c.IsDeleted,
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DeletedAt = c.DeletedAt,
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UserName = u.NickName,
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ReplyToUserName = ru.NickName,
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PostTitle = p.Title,
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ParentCommentContent = pc.Content,
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}, true);
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var resp = ToPage(response, parm);
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return resp;
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}
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/// <summary>
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/// 分页查询（排序已在Select之前完成）
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/// </summary>
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private PagedInfo<T> ToPage<T>(ISugarQueryable<T> source, PagerInfo parm)
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{
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var page = new PagedInfo<T>();
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var total = 0;
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page.PageSize = parm.PageSize;
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page.PageIndex = parm.PageNum;
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// 注意：排序已经在 Select 之前完成了，这里不再需要排序
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page.Result = source
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.ToPageList(parm.PageNum, parm.PageSize, ref total);
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page.TotalNum = total;
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return page;
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}
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/// <summary>
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/// 获取详情
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/// </summary>
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/// <param name="Id"></param>
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/// <returns></returns>
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public T_Comments GetInfo(long Id)
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{
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var response = Queryable()
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.Where(x => x.Id == Id)
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.First();
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return response;
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}
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/// <summary>
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/// 添加帖子评论记录
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/// </summary>
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/// <param name="model"></param>
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/// <returns></returns>
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public T_Comments AddT_Comments(T_Comments model)
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{
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return Insertable(model).ExecuteReturnEntity();
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}
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/// <summary>
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/// 修改帖子评论记录
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/// </summary>
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/// <param name="model"></param>
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/// <returns></returns>
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public int UpdateT_Comments(T_Comments model)
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{
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return Update(model, true);
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}
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/// <summary>
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/// 查询导出表达式
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/// </summary>
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/// <param name="parm"></param>
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/// <returns></returns>
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private static Expressionable<T_Comments> QueryExp(T_CommentsQueryDto parm)
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{
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var predicate = Expressionable.Create<T_Comments>();
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predicate = predicate.AndIF(parm.PostId != null, it => it.PostId == parm.PostId);
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predicate = predicate.AndIF(parm.UserId != null, it => it.UserId == parm.UserId);
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return predicate;
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}
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}
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} |