JiCangHai/PingTai/DSWeb/Hubs/ChatHub.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNet.SignalR;
using Microsoft.AspNet.SignalR.Hubs;
using DSWeb.SoftMng.BLL;
using DSWeb.Areas.CommMng.Models;
using Newtonsoft.Json;

namespace DSWeb
{
    [HubName("chatHub")]
    public class ChatHub : Hub
    {
        // 静态属性
        public static List<UserInfo> OnlineUsers = new List<UserInfo>(); // 在线用户列表
        static readonly IHubContext HubContext = GlobalHost.ConnectionManager.GetHubContext<ChatHub>();//取得Hub上下文
        /// <summary>
        /// 登录连线
        /// </summary>
        /// <param name="userId">用户Id</param>
        /// <param name="userName">用户名</param>
        public void Connect(string userId, string userName, string userFace)
        {
            var connnectId = Context.ConnectionId;

            if (OnlineUsers.Count(x => x.ConnectionId == connnectId) == 0)
            {
                if (OnlineUsers.Any(x => x.UserId == userId))
                {
                    var items = OnlineUsers.Where(x => x.UserId == userId).ToList();
                    foreach (var item in items)
                    {
                        Clients.AllExcept(connnectId).onUserDisconnected(item.ConnectionId, item.UserName);
                    }
                    OnlineUsers.RemoveAll(x => x.UserId == userId);
                }
                //添加在线人员
                OnlineUsers.Add(new UserInfo
                {
                    ConnectionId = connnectId,
                    UserId = userId,
                    UserName = userName,
                    UserFace = userFace,
                    LastLoginTime = DateTime.Now
                });
            }
            // 所有客户端同步在线用户
            Clients.All.onConnected(connnectId, userName, OnlineUsers);
        }

        /// <summary>
        /// 发送私聊
        /// </summary>
        /// <param name="toUserId">接收方用户连接ID</param>
        /// <param name="data">内容</param>
        public void SendPrivateMessage(string toUserId, SYSMessagemb model)
        {
            //var fromUserId = Context.ConnectionId;
            var toUser = OnlineUsers.FirstOrDefault(x => x.ConnectionId == toUserId);
            //var fromUser = OnlineUsers.FirstOrDefault(x => x.ConnectionId == fromUserId);
            sys_messageBLL mbll = new sys_messageBLL();
            var msgModel = mbll.GetModel(model.GID);
            //_bll.Add(model);
            /*判断是否接收推送*/
            op_message_configBLL _bllc = new op_message_configBLL();
            int count = _bllc.GetRecordCount(string.Format("UserCode='{0}' and PId in (select GId from op_message_module where Name ='{1}') and IsPush=0", model.RECEIVER,model.NAME)); 
            if (toUser != null && count==0)
            {
                //服务端直接发送消息(S->B)
                HubContext.Clients.Client(toUserId).receivePrivateMessage("admin","系统消息", msgModel);

                // send to caller user
                // Clients.Caller.sendPrivateMessage(toUserId, fromUser.UserName, message);
            }
            //else
            //{
            //    //表示对方不在线(仅限B->S->B)注：调用来自请求客户端的方法
            //    //Clients.Caller.absentSubscriber();
            //}
        }
        /// <summary>
        /// 公告广播
        /// </summary>
        /// <param name="model">公告内容</param>
        /// <param name="action">添加或修改</param>
        public void SendNotice(SoftMng.Model.op_Notice model,string action,string ids="")
        {
            if (model != null)
            {
                var result = new
                {
                    model.GID,
                    model.Title,
                    CreateTime = ((DateTime)model.CreateTime).ToString("yyyy-MM-dd HH:mm")
                };
                //服务端直接发送消息(S->B)
                HubContext.Clients.All.receiveNotice(result, action);
            }
            else
            //服务端直接发送消息(S->B)删除
            HubContext.Clients.All.receiveNotice(ids, action);

        }
        /// <inheritdoc />
        /// <summary>
        /// 断线时调用
        /// </summary>
        /// <param name="stopCalled"></param>
        /// <returns></returns>
        public override Task OnDisconnected(bool stopCalled)
        {
            var user = OnlineUsers.FirstOrDefault(u => u.ConnectionId == Context.ConnectionId);
            // 判断用户是否存在,存在则删除
            if (user == null) return base.OnDisconnected(stopCalled);
            Clients.All.onUserDisconnected(user.ConnectionId, user.UserName);   //调用客户端用户离线通知
            // 删除用户
            OnlineUsers.Remove(user);
            return base.OnDisconnected(stopCalled);
        }
    }
}