Merge branch 'feature-nxdev' of https://gitea.nxsir.cn/code/IM into feature-nxdev

backend/IM_API/Services/ConversationService.cs

@@ -1,5 +1,5 @@
 using AutoMapper;
-using IM_API.Dtos;
+using IM_API.Dtos.Conversation;
 using IM_API.Exceptions;
 using IM_API.Interface.Services;
 using IM_API.Models;
@@ -134,5 +134,27 @@ namespace IM_API.Services
             return true;
 
         }
+
+        public async Task MakeConversationAsync(int userAId, int userBId, ChatType chatType)
+        {
+            var userAcExist = await _context.Conversations.AnyAsync(x => x.UserId == userAId && x.TargetId == userBId);
+            if (userAcExist) return;
+            var streamKey = chatType == ChatType.PRIVATE ? 
+                StreamKeyBuilder.Private(userAId, userBId) : StreamKeyBuilder.Group(userBId);
+            var conversation = new Conversation()
+            {
+                ChatType = (int)chatType,
+                LastMessage = "",
+                LastMessageTime = DateTime.UtcNow,
+                LastReadMessageId = -1,
+                StreamKey = streamKey,
+                TargetId = userBId,
+                UnreadCount = 0,
+                UserId = userAId
+
+            };
+            _context.Conversations.Add(conversation);
+            await _context.SaveChangesAsync();
+        }
     }
 }