Messages first init

Govor.Core/Infrastructure/Validators/MessageValidator.cs

@@ -0,0 +1,44 @@
+using Govor.Core.Models;
+
+namespace Govor.Core.Infrastructure.Validators;
+
+public class MessageValidator : IObjectValidator<Message>
+{
+    public void Validate(Message message)
+    {
+        try
+        {
+            if (message is null)
+                throw new ArgumentNullException(nameof(message));
+            if (message.Id == Guid.Empty)
+                throw new ArgumentException("Message ID cannot be empty", nameof(message.Id));
+            if (message.SenderId == Guid.Empty)
+                throw new ArgumentException("Sender ID cannot be empty", nameof(message.SenderId));
+            if (message.RecipientId == Guid.Empty)
+                throw new ArgumentException("Recipient ID cannot be empty", nameof(message.RecipientId));
+            if(string.IsNullOrWhiteSpace(message.EncryptedContent))
+                throw new ArgumentException("Encrypted content cannot be empty", nameof(message.EncryptedContent));
+            if(message.IsEdited && message.EditedAt == DateTime.MinValue)
+                throw new ArgumentException("Edited at time cannot be empty", nameof(message.EditedAt));
+            if (message.EditedAt == DateTime.MinValue)
+                throw new ArgumentException("Edited at time cannot be empty", nameof(message.EditedAt));
+        }
+        catch (Exception ex)
+        {
+            throw new InvalidObjectException<Message>(ex);
+        }
+    }
+
+    public bool TryValidate(Message message)
+    {
+        try
+        {
+            Validate(message);
+            return true;
+        }
+        catch (Exception ex)
+        {
+            return false;
+        }
+    }
+}

Govor.Core/Models/Message.cs

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+namespace Govor.Core.Models;
+
+public class Message
+{
+    public Guid Id { get; set; }
+    public Guid SenderId { get; set; }
+    public Guid RecipientId { get; set; } // or GroupId
+    public RecipientType RecipientType { get; set; }
+    public string EncryptedContent { get; set; } = string.Empty;
+    public DateTime SentAt { get; set; }
+    public bool IsEdited { get; set; } = false;
+    public DateTime? EditedAt { get; set; }
+}
+
+public enum RecipientType
+{
+    User,
+    Group
+}

Govor.Core/Repositories/Messages/IMessagesExist.cs

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+using Govor.Core.Models;
+
+namespace Govor.Core.Repositories.Messages;
+
+public interface IMessagesExist
+{
+    bool Exist(Message message);
+}

Govor.Core/Repositories/Messages/IMessagesReader.cs

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+using Govor.Core.Models;
+
+namespace Govor.Core.Repositories.Messages;
+
+public interface IMessagesReader
+{
+    Task<List<Message>> GetAllAsync();
+    Task<Message> FindByIdAsync(Guid messageId);
+    Task<List<Message>> FindBySenderIdAsync(Guid senderId);
+    Task<List<Message>> FindByReceiverIdAsync(Guid receiverId);
+    Task<List<Message>> FindBySenderAndReceiverIdAsync(Guid senderId, Guid receiverId);
+    Task<List<Message>> FindBySentAtAsync(DateTime date);
+}

Govor.Core/Repositories/Messages/IMessagesRepository.cs

@@ -0,0 +1,6 @@
+namespace Govor.Core.Repositories.Messages;
+
+public interface IMessagesRepository : IMessagesReader, IMessagesWriter, IMessagesExist
+{
+    
+}

Govor.Core/Repositories/Messages/IMessagesWriter.cs

@@ -0,0 +1,10 @@
+using Govor.Core.Models;
+
+namespace Govor.Core.Repositories.Messages;
+
+public interface IMessagesWriter
+{
+    void Add(Message message);
+    void Update(Message message);
+    void Delete(Guid messageId);
+}