Add private chat support and group model enhancements

Introduces repositories, validators, and integration tests for private chats. Refactors group-related models to support invitations and memberships, updates group repository interfaces and implementations, and enhances message service logic to handle private chat creation and retrieval. Also registers new services and validators in DI, and updates related tests.

Govor.API.Tests/UnitTests/Services/MessageServiceTests.cs

@@ -5,6 +5,7 @@ using Govor.Application.Services;
 using Govor.Core.Models;
 using Govor.Core.Repositories.Groups;
 using Govor.Core.Repositories.Messages;
+using Govor.Core.Repositories.PrivateChats;
 using Govor.Core.Repositories.Users;
 using Govor.Data.Repositories.Exceptions;
 using Microsoft.Extensions.Logging;
@@ -19,6 +20,7 @@ public class MessageServiceTests
     private Mock<IUsersRepository> _mockUsersRepo;
     private Mock<IGroupsRepository> _mockGroupsRepo;
     private Mock<IVerifyFriendship> _mockVerifyFriendship;
+    private Mock<IPrivateChatsRepository> _mockPrivateChats;
     private Mock<ILogger<MessageService>> _mockLogger;
     private MessageService _messageService;
     
@@ -29,6 +31,7 @@ public class MessageServiceTests
         _mockUsersRepo = new Mock<IUsersRepository>();
         _mockGroupsRepo = new Mock<IGroupsRepository>();
         _mockVerifyFriendship = new Mock<IVerifyFriendship>();
+        _mockPrivateChats = new Mock<IPrivateChatsRepository>();
         _mockLogger = new Mock<ILogger<MessageService>>();
 
         _messageService = new MessageService(
@@ -36,6 +39,7 @@ public class MessageServiceTests
             _mockUsersRepo.Object,
             _mockGroupsRepo.Object,
             _mockVerifyFriendship.Object,
+            _mockPrivateChats.Object,
             _mockLogger.Object);
     }
 
@@ -59,7 +63,8 @@ public class MessageServiceTests
         _mockUsersRepo.Setup(r => r.ExistsByIdAsync(recipientId)).ReturnsAsync(true);
         _mockVerifyFriendship.Setup(v => v.VerifyAsync(senderId, recipientId)).Returns(Task.CompletedTask);
         _mockMessagesRepo.Setup(r => r.AddAsync(It.IsAny<Message>())).Returns(Task.CompletedTask);
-
+        _mockPrivateChats.Setup(c => c.Exist(senderId, recipientId)).Returns(true);
+        _mockPrivateChats.Setup(c => c.GetByMembersAsync(senderId, recipientId)).ReturnsAsync(new PrivateChat(){Id = recipientId});
         // Act
         var result = await _messageService.SendMessageAsync(sendMessageParams);
         // Assert 
@@ -90,7 +95,7 @@ public class MessageServiceTests
             new List<SendMedia>());
 
         _mockGroupsRepo.Setup(r => r.Exists(groupId)).Returns(true);
-        _mockGroupsRepo.Setup(r => r.IsUserMemberOfGroupAsync(senderId, groupId)).Returns(true); 
+        _mockGroupsRepo.Setup(r => r.IsUserMemberOfGroupAsync(senderId, groupId)).ReturnsAsync(true); 
         _mockMessagesRepo.Setup(r => r.AddAsync(It.IsAny<Message>())).Returns(Task.CompletedTask);
 
         // Act
@@ -130,7 +135,7 @@ public class MessageServiceTests
         Assert.That(result.IsSuccess, Is.EqualTo(false));
         Assert.That(result.Exception, Is.Not.Null);
         Assert.That(result.Exception,Is.TypeOf<KeyNotFoundException>());
-        Assert.That(result.MessageId, Is.EqualTo(Guid.Empty));
+        Assert.That(result.Message, Is.Null);
     }
 
     [Test]
@@ -160,9 +165,11 @@ public class MessageServiceTests
         Assert.That(result.IsSuccess, Is.EqualTo(false));
         Assert.That(result.Exception, Is.Not.Null);
         Assert.That(result.Exception,Is.TypeOf<FriendshipException>());
-        Assert.That(result.MessageId, Is.EqualTo(Guid.Empty));
+        Assert.That(result.Message, Is.Null);
     }
     
+    
+    
     // Test for EditMessageAsync action 
     [Test]
     public async Task EditMessageAsync_Success()