前端：

1、完善创建群聊逻辑
后端：
1、完善群聊相关接口

backend/IM_API/Application/EventHandlers/GroupInviteActionUpdateHandler/RequestDbHandler.cs

@@ -0,0 +1,24 @@
+using IM_API.Domain.Events;
+using IM_API.Interface.Services;
+using MassTransit;
+
+namespace IM_API.Application.EventHandlers.GroupInviteActionUpdateHandler
+{
+    public class RequestDbHandler : IConsumer<GroupInviteActionUpdateEvent>
+    {
+        private readonly IGroupService _groupService;
+        public RequestDbHandler(IGroupService groupService)
+        {
+            _groupService = groupService;
+        }
+
+        public async Task Consume(ConsumeContext<GroupInviteActionUpdateEvent> context)
+        {
+            var @event = context.Message;
+            if(@event.Action == Models.GroupInviteState.Passed)
+            {
+                await _groupService.MakeGroupRequestAsync(@event.UserId, @event.InviteUserId,@event.GroupId);
+            }
+        }
+    }
+}

backend/IM_API/Application/EventHandlers/GroupInviteActionUpdateHandler/SignalRHandler.cs

@@ -0,0 +1,34 @@
+using IM_API.Domain.Events;
+using IM_API.Dtos;
+using IM_API.Hubs;
+using IM_API.VOs.Group;
+using MassTransit;
+using Microsoft.AspNetCore.SignalR;
+
+namespace IM_API.Application.EventHandlers.GroupInviteActionUpdateHandler
+{
+    public class SignalRHandler : IConsumer<GroupInviteActionUpdateEvent>
+    {
+        private IHubContext<ChatHub> _hub;
+        public SignalRHandler(IHubContext<ChatHub> hub)
+        {
+            _hub = hub;
+        }
+
+        public async Task Consume(ConsumeContext<GroupInviteActionUpdateEvent> context)
+        {
+            var @event = context.Message;
+            var msg = new HubResponse<GroupInviteActionUpdateVo>("Event", new GroupInviteActionUpdateVo
+            {
+                Action = @event.Action,
+                GroupId = @event.GroupId,
+                InvitedUserId = @event.UserId,
+                InviteUserId = @event.InviteUserId,
+                InviteId = @event.InviteId
+            });
+
+            await _hub.Clients.Users([@event.UserId.ToString(), @event.InviteUserId.ToString()])
+                .SendAsync("ReceiveMessage",msg);
+        }
+    }
+}

backend/IM_API/Application/EventHandlers/GroupInviteHandler/GroupInviteSignalRHandler.cs

@@ -0,0 +1,26 @@
+using IM_API.Domain.Events;
+using IM_API.Dtos;
+using IM_API.Hubs;
+using IM_API.VOs.Group;
+using MassTransit;
+using Microsoft.AspNetCore.SignalR;
+
+namespace IM_API.Application.EventHandlers.GroupInviteHandler
+{
+    public class GroupInviteSignalRHandler : IConsumer<GroupInviteEvent>
+    {
+        private readonly IHubContext<ChatHub> _hub;
+        public GroupInviteSignalRHandler(IHubContext<ChatHub> hub)
+        {
+            _hub = hub;
+        }
+
+        public async Task Consume(ConsumeContext<GroupInviteEvent> context)
+        {
+            var @event = context.Message;
+            var list  = @event.Ids.Select(id => id.ToString()).ToArray();
+            var msg = new HubResponse<GroupInviteVo>("Event", new GroupInviteVo { GroupId = @event.GroupId, UserId = @event.UserId });
+            await _hub.Clients.Users(list).SendAsync("ReceiveMessage", msg);
+        }
+    }
+}

backend/IM_API/Application/EventHandlers/GroupJoinHandler/GroupJoinConversationHandler.cs

@@ -0,0 +1,21 @@
+using IM_API.Domain.Events;
+using IM_API.Interface.Services;
+using MassTransit;
+
+namespace IM_API.Application.EventHandlers.GroupJoinHandler
+{
+    public class GroupJoinConversationHandler : IConsumer<GroupJoinEvent>
+    {
+        private IConversationService _conversationService;
+        public GroupJoinConversationHandler(IConversationService conversationService)
+        {
+            _conversationService = conversationService;
+        }
+
+        public async Task Consume(ConsumeContext<GroupJoinEvent> context)
+        {
+            var @event = context.Message;
+            await _conversationService.MakeConversationAsync(@event.UserId, @event.GroupId, Models.ChatType.GROUP);
+        }
+    }
+}

backend/IM_API/Application/EventHandlers/GroupJoinHandler/GroupJoinDbHandler.cs

@@ -0,0 +1,22 @@
+using IM_API.Domain.Events;
+using IM_API.Interface.Services;
+using MassTransit;
+
+namespace IM_API.Application.EventHandlers.GroupJoinHandler
+{
+    public class GroupJoinDbHandler : IConsumer<GroupJoinEvent>
+    {
+        private readonly IGroupService _groupService;
+        public GroupJoinDbHandler(IGroupService groupService)
+        {
+            _groupService = groupService;
+        }
+
+        public async Task Consume(ConsumeContext<GroupJoinEvent> context)
+        {
+            await _groupService.MakeGroupMemberAsync(context.Message.UserId, 
+                context.Message.GroupId, context.Message.IsCreated ? 
+                Models.GroupMemberRole.Master : Models.GroupMemberRole.Normal);
+        }
+    }
+}

backend/IM_API/Application/EventHandlers/GroupJoinHandler/GroupJoinSignalrHandler.cs

@@ -0,0 +1,45 @@
+using IM_API.Domain.Events;
+using IM_API.Dtos;
+using IM_API.Hubs;
+using IM_API.Tools;
+using IM_API.VOs.Group;
+using MassTransit;
+using Microsoft.AspNetCore.SignalR;
+using StackExchange.Redis;
+
+namespace IM_API.Application.EventHandlers.GroupJoinHandler
+{
+    public class GroupJoinSignalrHandler : IConsumer<GroupJoinEvent>
+    {
+        private readonly IHubContext<ChatHub> _hub;
+        private readonly IDatabase _redis;
+        public GroupJoinSignalrHandler(IHubContext<ChatHub> hub, IConnectionMultiplexer connectionMultiplexer)
+        {
+            _hub = hub;
+            _redis = connectionMultiplexer.GetDatabase();
+        }
+
+        public async Task Consume(ConsumeContext<GroupJoinEvent> context)
+        {
+            var @event = context.Message;
+            string stramKey = StreamKeyBuilder.Group(@event.GroupId);
+            //将用户加入群组通知
+            var list = await _redis.SetMembersAsync(RedisKeys.GetConnectionIdKey(@event.UserId.ToString()));
+            if(list != null && list.Length > 0)
+            {
+                var tasks = list.Select(connectionId =>
+                    _hub.Groups.AddToGroupAsync(connectionId!, stramKey)
+                ).ToList();
+
+                await Task.WhenAll(tasks);
+            }
+            //发送通知给群成员
+            var msg = new GroupJoinVo
+            {
+                GroupId = @event.GroupId,
+                UserId = @event.UserId
+            };
+            await _hub.Clients.Group(stramKey).SendAsync("ReceiveMessage",new HubResponse<GroupJoinVo>("Event",msg));
+        }
+    }
+}

backend/IM_API/Application/EventHandlers/GroupRequestHandler/GroupRequestSignalRHandler.cs

@@ -1,13 +1,17 @@
 using IM_API.Domain.Events;
+using IM_API.Hubs;
 using MassTransit;
+using Microsoft.AspNetCore.SignalR;
 
 namespace IM_API.Application.EventHandlers.GroupRequestHandler
 {
-    public class GroupRequestSignalRHandler : IConsumer<GroupRequestEvent>
+    public class GroupRequestSignalRHandler(IHubContext<ChatHub> hubContext) : IConsumer<GroupRequestEvent>
     {
-        Task IConsumer<GroupRequestEvent>.Consume(ConsumeContext<GroupRequestEvent> context)
+        private readonly IHubContext<ChatHub> _hub = hubContext;
+
+        public async Task Consume(ConsumeContext<GroupRequestEvent> context)
         {
-            throw new NotImplementedException();
+
         }
     }
 }

backend/IM_API/Application/EventHandlers/GroupRequestHandler/NextEventHandler.cs

@@ -0,0 +1,31 @@
+using IM_API.Domain.Events;
+using MassTransit;
+
+namespace IM_API.Application.EventHandlers.GroupRequestHandler
+{
+    public class NextEventHandler : IConsumer<GroupRequestEvent>
+    {
+        private readonly IPublishEndpoint _endpoint;
+        public NextEventHandler(IPublishEndpoint endpoint)
+        {
+            _endpoint = endpoint;
+        }
+
+        public async Task Consume(ConsumeContext<GroupRequestEvent> context)
+        {
+            var @event = context.Message;
+            if(@event.Action == Models.GroupRequestState.Passed)
+            {
+                await _endpoint.Publish(new GroupJoinEvent
+                {
+                    AggregateId = @event.AggregateId,
+                    OccurredAt = @event.OccurredAt,
+                    EventId = Guid.NewGuid(),
+                    GroupId = @event.GroupId,
+                    OperatorId = @event.OperatorId,
+                    UserId = @event.UserId
+                });
+            }
+        }
+    }
+}

backend/IM_API/Application/EventHandlers/GroupRequestUpdateHandler/NextEventHandler.cs

@@ -0,0 +1,31 @@
+using IM_API.Domain.Events;
+using MassTransit;
+
+namespace IM_API.Application.EventHandlers.GroupRequestUpdateHandler
+{
+    public class NextEventHandler : IConsumer<GroupRequestUpdateEvent>
+    {
+        private readonly IPublishEndpoint _endpoint;
+        public NextEventHandler(IPublishEndpoint endpoint)
+        {
+            _endpoint = endpoint;
+        }
+
+        public async Task Consume(ConsumeContext<GroupRequestUpdateEvent> context)
+        {
+            var @event = context.Message;
+            if(@event.Action == Models.GroupRequestState.Passed)
+            {
+                await _endpoint.Publish(new GroupJoinEvent
+                {
+                    AggregateId = @event.AggregateId,
+                    OccurredAt = @event.OccurredAt,
+                    EventId = Guid.NewGuid(),
+                    GroupId = @event.GroupId,
+                    OperatorId = @event.OperatorId,
+                    UserId = @event.UserId
+                });
+            }
+        }
+    }
+}

backend/IM_API/Application/EventHandlers/GroupRequestUpdateHandler/RequestUpdateSignalrHandler.cs

@@ -0,0 +1,29 @@
+using IM_API.Domain.Events;
+using IM_API.Dtos;
+using IM_API.Hubs;
+using IM_API.VOs.Group;
+using MassTransit;
+using Microsoft.AspNetCore.SignalR;
+
+namespace IM_API.Application.EventHandlers.GroupRequestUpdateHandler
+{
+    public class RequestUpdateSignalrHandler : IConsumer<GroupRequestUpdateEvent>
+    {
+        private readonly IHubContext<ChatHub> _hub;
+        public RequestUpdateSignalrHandler(IHubContext<ChatHub> hub)
+        {
+            _hub = hub;
+        }
+
+        public async Task Consume(ConsumeContext<GroupRequestUpdateEvent> context)
+        {
+            var msg = new HubResponse<GroupRequestUpdateVo>("Event", new GroupRequestUpdateVo
+            {
+                GroupId = context.Message.GroupId,
+                RequestId = context.Message.RequestId,
+                UserId = context.Message.UserId
+            });
+            await _hub.Clients.User(context.Message.UserId.ToString()).SendAsync("ReceiveMessage", msg);
+        }
+    }
+}