Исправлен механизм прочтения сообщений

backend/src/Modules/Messaging/Domain/Message.cs

@@ -18,7 +18,7 @@ public abstract class Message : AggregateRoot<Guid>
     public Guid SenderId { get; protected set; }
     public DateTime CreatedAt { get; protected set; }
     public long SequenceId { get; protected set; }
-    
+
     public void SetSequenceId(long sequenceId)
     {
         SequenceId = sequenceId;
@@ -26,10 +26,10 @@ public abstract class Message : AggregateRoot<Guid>
     // ================== Опциональные метаданные (общего назначения) ==================
     public Guid? ReplyToId { get; protected set; }
     public Guid? ForwardedFromId { get; protected set; }
-    
+
     // ================== Флаги ==================
     public MessageState State { get; protected set; }
-    
+
     // ================== Абстрактные / Виртуальные свойства ==================
     public abstract string Type { get; }
     public abstract string? Content { get; protected set; }
@@ -42,16 +42,20 @@ public abstract class Message : AggregateRoot<Guid>
     protected List<DeletedMessage> _deletedFor = new();
     public IReadOnlyCollection<DeletedMessage> DeletedFor => _deletedFor.AsReadOnly();
 
+    // ================== Прочитано ==================
+    protected List<Guid> _readByUsers = new();
+    public IReadOnlyCollection<Guid> ReadByUsers => _readByUsers.AsReadOnly();
+
     // ================== Инфраструктурный конструктор EF ==================
     protected Message() : base(Guid.Empty) { }
 
     protected Message(
-        Guid id, 
-        Guid chatId, 
-        Guid senderId, 
-        Guid? replyToId, 
-        Guid? forwardedFromId, 
-        DateTime createdAt, 
+        Guid id,
+        Guid chatId,
+        Guid senderId,
+        Guid? replyToId,
+        Guid? forwardedFromId,
+        DateTime createdAt,
         bool isImported) : base(id)
     {
         ChatId = chatId;
@@ -59,7 +63,7 @@ public abstract class Message : AggregateRoot<Guid>
         ReplyToId = replyToId;
         ForwardedFromId = forwardedFromId;
         CreatedAt = createdAt;
-        
+
         if (isImported) AddState(MessageState.IsImported);
     }
 
@@ -89,6 +93,16 @@ public abstract class Message : AggregateRoot<Guid>
             _deletedFor.Add(new DeletedMessage(Id, userId));
         }
     }
+
+    public void MarkAsRead(Guid userId)
+    {
+        if (!_readByUsers.Contains(userId))
+        {
+            _readByUsers.Add(userId);
+        }
+    }
+
+    public bool IsReadBy(Guid userId) => _readByUsers.Contains(userId);
 }