zhywebcore/learun.core/learun.application/Message/Contacts/IMContactsService.cs

using learun.iapplication;
using System;
using System.Collections.Generic;
using System.Text;
using System.Threading.Tasks;

namespace learun.application
{
	/// <summary>
	/// 版 本 EasyCode EC管理后台
	/// Copyright (c) 2019-present EC管理有限公司
	/// 创建人：tobin
	/// 日 期：2019.11.05
	/// 描 述：最近联系人列表
	/// </summary>
	public class IMContactsService : ServiceBase
	{
		#region 构造函数和属性

		private readonly string fieldSql;

		/// <summary>
		///
		/// </summary>
		public IMContactsService()
		{
			fieldSql = @"
                t.F_Id,
                t.F_MyUserId,
                t.F_OtherUserId,
                t.F_Content,
                t.F_Time,
                t.F_IsRead
            ";
		}

		#endregion 构造函数和属性

		#region 获取数据

		/// <summary>
		/// 获取列表数据
		/// </summary>
		/// <param name="userId">用户Id</param>
		/// <returns></returns>
		public Task<IEnumerable<IMContactsEntity>> GetList(string userId)
		{
			var strSql = new StringBuilder();
			strSql.Append("SELECT ");
			strSql.Append(fieldSql);
			strSql.Append(" FROM LR_IM_Contacts t where  t.F_MyUserId = @userId Order By t.F_Time Desc ");
			return this.BaseRepository().FindList<IMContactsEntity>(strSql.ToString(), new { userId });
		}

		/// <summary>
		/// 获取列表数据
		/// </summary>
		/// <param name="userId">用户Id</param>
		/// <param name="time">时间</param>
		/// <returns></returns>
		public Task<IEnumerable<IMContactsEntity>> GetList(string userId, DateTime time)
		{
			var strSql = new StringBuilder();
			strSql.Append("SELECT ");
			strSql.Append(fieldSql);
			strSql.Append(" FROM LR_IM_Contacts t where  t.F_MyUserId = @userId AND t.F_Time >= @time  Order By t.F_Time Asc ");
			return this.BaseRepository().FindList<IMContactsEntity>(strSql.ToString(), new { userId, time });
		}

		/// <summary>
		/// 获取实体
		/// </summary>
		/// <param name="userId">发送人</param>
		/// <param name="otherUserId">接收人</param>
		/// <returns></returns>
		public Task<IMContactsEntity> GetEntity(string userId, string otherUserId)
		{
			var strSql = new StringBuilder();
			strSql.Append("SELECT ");
			strSql.Append(fieldSql);
			strSql.Append(" FROM LR_IM_Contacts t where  t.F_MyUserId = @userId AND t.F_OtherUserId = @otherUserId ");
			return this.BaseRepository().FindEntity<IMContactsEntity>(strSql.ToString(), new { userId, otherUserId });
		}

		#endregion 获取数据

		#region 提交数据

		/// <summary>
		/// 保存实体数据（新增、修改）
		/// </summary>
		/// <param name="entity">实体</param>
		/// <returns></returns>
		public async Task SaveEntity(IMContactsEntity entity)
		{
			var entityTmp = await GetEntity(entity.F_MyUserId, entity.F_OtherUserId);
			entity.F_IsRead = 2;
			if (entityTmp == null)
			{
				entity.F_Id = Guid.NewGuid().ToString();
				entity.F_Time = DateTime.Now;
				await this.BaseRepository().Insert(entity);
			}
			else
			{
				entity.F_Id = entityTmp.F_Id;
				entity.F_Time = DateTime.Now;
				await this.BaseRepository().Update(entity);
			}
		}

		/// <summary>
		/// 更新记录读取状态
		/// </summary>
		/// <param name="myUserId">自己本身用户ID</param>
		/// <param name="otherUserId">对方用户ID</param>
		public async Task UpdateState(string myUserId, string otherUserId)
		{
			var entity = await GetEntity(myUserId, otherUserId);
			if (entity != null)
			{
				entity.F_IsRead = 2;
				await this.BaseRepository().Update(entity);
			}
		}

		/// <summary>
		/// 删除最近联系人
		/// </summary>
		/// <param name="myUserId">发起者id</param>
		/// <param name="otherUserId">发给人ID</param>
		public async Task DeleteEntity(string myUserId, string otherUserId)
		{
			await this.BaseRepository().DeleteAny<IMContactsEntity>(new { F_MyUserId = myUserId, F_OtherUserId = otherUserId });
		}

		#endregion 提交数据
	}
}