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backend/IM_API/Services/GroupService.cs

@@ -79,6 +79,7 @@ namespace IM_API.Services
             }
         }
 
+        
         public Task DeleteGroupAsync(int userId, int groupId)
         {
             throw new NotImplementedException();
@@ -90,15 +91,15 @@ namespace IM_API.Services
                 x => x.Id == groupId) ?? throw new BaseException(CodeDefine.GROUP_NOT_FOUND);
             //过滤非好友
             var groupInviteIds = await validFriendshipAsync(userId, userIds);
-            var inviteList = groupInviteIds.Select(id => new GroupInvite
+            var inviteList = groupInviteIds.Select(id => new GroupRequest
             {
                 Created = DateTime.UtcNow,
                 GroupId = group.Id,
-                InviteUser = userId,
-                InvitedUser = id,
-                StateEnum = GroupInviteState.Pending
+                UserId = id,
+                InviteUserId = userId,
+                StateEnum = GroupRequestState.TargetPending
             }).ToList();
-            _context.GroupInvites.AddRange(inviteList);
+            _context.GroupRequests.AddRange(inviteList);
             await _context.SaveChangesAsync();
             await _endPoint.Publish(new GroupInviteEvent
             {
@@ -132,7 +133,7 @@ namespace IM_API.Services
             throw new NotImplementedException();
         }
 
-        public async Task<List<GroupInfoDto>> GetGroupListAsync(int userId, int page, int limit, bool desc)
+        public async Task<List<GroupInfoDto>> GetGroupListAsync(int userId, int page = 1, int limit = 50, bool desc = false)
         {
             var query = _context.GroupMembers
                 .Where(x => x.UserId == userId)
@@ -159,14 +160,18 @@ namespace IM_API.Services
             _context.Groups.Update(group);
             await _context.SaveChangesAsync();
         }
+        
         public async Task HandleGroupInviteAsync(int userid, HandleGroupInviteDto dto)
         {
             var user = _userService.GetUserInfoAsync(userid);
-            var inviteInfo = await _context.GroupInvites.FirstOrDefaultAsync(x => x.Id == dto.InviteId)
+            var inviteInfo = await _context.GroupRequests
+                .FirstOrDefaultAsync(x => x.UserId == userid && x.StateEnum == GroupRequestState.TargetPending)
                 ?? throw new BaseException(CodeDefine.INVALID_ACTION);
-            if (inviteInfo.InvitedUser != userid) throw new BaseException(CodeDefine.AUTH_FAILED);
+            if (!(dto.Action == GroupRequestState.TargetPending ||
+                dto.Action == GroupRequestState.TargetDeclined))
+                return;
             inviteInfo.StateEnum = dto.Action;
-            _context.GroupInvites.Update(inviteInfo);
+            _context.GroupRequests.Update(inviteInfo);
             await _context.SaveChangesAsync();
             await _endPoint.Publish(new GroupInviteActionUpdateEvent
             {
@@ -176,12 +181,13 @@ namespace IM_API.Services
                 EventId = Guid.NewGuid(),
                 GroupId = inviteInfo.GroupId,
                 InviteId = inviteInfo.Id,
-                InviteUserId = inviteInfo.InviteUser.Value,
+                InviteUserId = inviteInfo.InviteUserId!.Value,
                 OperatorId = userid,
                 UserId = userid
 
             });
         }
+        
         public async Task HandleGroupRequestAsync(int userid, HandleGroupRequestDto dto)
         {
             var user = _userService.GetUserInfoAsync(userid);
@@ -302,5 +308,68 @@ namespace IM_API.Services
 
             return _mapper.Map<GroupInfoVo>(groupInfo);
         }
+
+        public async Task<List<GroupNotificationVo>> GetGroupNotificationAsync(int userId)
+        {
+            // 1. 查询群请求记录
+            var groupList = await _context.GroupMembers
+               .Where(x => x.UserId == userId &&
+               (x.Role == (sbyte)GroupMemberRole.Master || x.Role == (sbyte)GroupMemberRole.Administrator))
+               .Select(s => s.GroupId)
+               .ToListAsync();
+
+            var groupRequest = await _context.GroupRequests
+                .Where(x => groupList.Contains(x.GroupId) || x.UserId == userId || x.InviteUserId == userId)
+                .OrderByDescending(o => o.Id)
+                .ToListAsync();
+
+            if (!groupRequest.Any()) return new List<GroupNotificationVo>();
+
+            // 2. 收集所有需要的 ID 并去重
+            var userIds = groupRequest.Select(s => s.UserId).Distinct().ToList();
+            var inviteUserIds = groupRequest.Where(x => x.InviteUserId != null).Select(s => s.InviteUserId.Value).Distinct().ToList();
+            var groupIds = groupRequest.Select(s => s.GroupId).Distinct().ToList();
+
+            var userList = await _userService.GetUserInfoListAsync(userIds);
+            var inviteUserList = await _userService.GetUserInfoListAsync(inviteUserIds);
+            var groupInfoList = await _context.Groups
+                .Where(x => groupIds.Contains(x.Id))
+                .ToListAsync();
+
+            // 2. 转换为字典
+            var userDict = userList.ToDictionary(u => u.Id);
+            var inviteUserDict = inviteUserList.ToDictionary(u => u.Id);
+            var groupDict = groupInfoList.ToDictionary(g => g.Id);
+
+            // 3. 组装数据 (Select 逻辑不变)
+            return groupRequest.Select(g =>
+            {
+                var gnv = _mapper.Map<GroupNotificationVo>(g);
+
+                // 匹配用户信息
+                if (userDict.TryGetValue(g.UserId, out var u))
+                {
+                    gnv.UserAvatar = u.Avatar;
+                    gnv.NickName = u.NickName;
+                }
+
+                // 匹配邀请人信息
+                if (g.InviteUserId.HasValue && inviteUserDict.TryGetValue(g.InviteUserId.Value, out var i))
+                {
+                    gnv.InviteUserAvatar = i.Avatar;
+                    gnv.InviteUserNickname = i.NickName;
+                }
+
+                // 匹配群信息
+                if (groupDict.TryGetValue(g.GroupId, out var gi))
+                {
+                    gnv.GroupAvatar = gi.Avatar;
+                    gnv.GroupName = gi.Name;
+                }
+
+                return gnv;
+            }).ToList();
+
+        }
     }
 }