Add online pinging and friendship verification features

Introduces OnlinePingingController and related integration/unit tests for user online status updates. Adds PingHandlerService with memory cache throttling, IPingHandlerService interface, and service registration. Implements VerifyFriendship service and interface for friendship validation, with exception handling. Refactors CurrentUserService for improved user ID extraction and testability. Updates ChatsHub to verify friendship before messaging. Cleans up MediaController and optimizes UsersRepository queries by removing unnecessary includes.

Govor.API/Controllers/MediaController.cs

@@ -14,7 +14,6 @@ public class MediaController : Controller
 {
     private readonly ILogger<MediaController> _logger;
     private readonly IStorageService _storageService;
-    private readonly IMediaAttachmentsRepository _repository;
 
     public MediaController(ILogger<MediaController> logger, IStorageService storageService)
     {
@@ -31,14 +30,6 @@ public class MediaController : Controller
            var url = await _storageService.SaveAsync(request.Data,request.FileName);
            var mediaId = Guid.NewGuid();
            
-           _repository.AddAsync(new MediaAttachments()
-           {
-               Id = mediaId,
-               FilePath = url,
-               EncryptedKey = request.EncryptedKey,
-               MimeType = request.MimeType,
-               Type = request.Type,
-           });
            
            return Ok(mediaId);
         }

Govor.API/Controllers/OnlinePingingController.cs

@@ -0,0 +1,57 @@
+using Govor.Application.Interfaces;
+using Govor.Application.Interfaces.Infrastructure.Extensions;
+using Govor.Core.Repositories.Users;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+
+namespace Govor.API.Controllers;
+
+[ApiController]
+[Route("api/online")]
+[Authorize(Roles = "User,Admin")]
+public class OnlinePingingController : Controller
+{
+    private readonly ILogger<OnlinePingingController> _logger;
+    private readonly IPingHandlerService _ping;
+    private readonly ICurrentUserService _currentUserService;
+
+    public OnlinePingingController(ILogger<OnlinePingingController> logger, 
+        IPingHandlerService ping,
+        ICurrentUserService currentUserService)
+    {
+        _logger = logger;
+        _ping = ping;
+        _currentUserService = currentUserService;
+    }
+    
+    
+    [HttpPatch("ping")]// api/online/ping 
+    public async Task<IActionResult> Ping()
+    {
+        try
+        {
+            _logger.LogInformation("Ping...");
+            
+            var id = _currentUserService.GetCurrentUserId();
+            await _ping.Ping(id);
+            
+            _logger.LogInformation($"Ping from user {id} processed successfully");
+            return Ok();
+        }
+        catch (InvalidOperationException e)
+        {
+            _logger.LogError(e, e.Message);
+            return BadRequest("User can't be found in our database.");
+        }
+        catch (UnauthorizedAccessException e)
+        {
+            _logger.LogError(e, e.Message);
+            return Forbid(e.Message);
+        }
+        catch (Exception e)
+        {
+            _logger.LogError(e, e.Message);
+            return StatusCode(500, new { error = "Failed to send friend request." });
+        }
+    }
+}

Govor.API/Extensions/ConfigurationProgramExtensions.cs

@@ -43,6 +43,9 @@ public static class ConfigurationProgramExtensions
         
         services.AddHttpContextAccessor(); // it's very important for CurrentUserService
         services.AddScoped<ICurrentUserService, CurrentUserService>();
+        
+        services.AddMemoryCache();
+        services.AddScoped<IPingHandlerService, PingHandlerService>();
     }
 
     public static void AddRepositories(this IServiceCollection services)

Govor.API/Hubs/ChatsHub.cs

@@ -1,4 +1,5 @@
 using System.Security.Claims;
+using Govor.Application.Interfaces;
 using Govor.Contracts.Requests.SignalR;
 using Govor.Core.Models;
 using Govor.Core.Repositories.Users;
@@ -13,6 +14,7 @@ namespace Govor.API.Hubs;
 public class ChatsHub : Hub
 {
     private readonly IUsersRepository _usersRepository;
+    private readonly IVerifyFriendship _verifyFriendship;
     private readonly ILogger<ChatsHub> _logger;
 
     public ChatsHub(IUsersRepository usersRepository, ILogger<ChatsHub> logger)
@@ -60,21 +62,22 @@ public class ChatsHub : Hub
         
         var senderId = GetUserId();
         
-        // Проверка существования получателя
-        /*try
+        // Проверка существования получателя и установленной дружбы 
+        try
         {
-            await _usersRepository.FindByIdAsync(toUserId);
+            await _usersRepository.FindByIdAsync(request.RecipientId);
+            await _verifyFriendship.VerifyAsync(senderId, request.RecipientId);
         }
         catch (NotFoundByKeyException<User> ex)
         {
-            _logger.LogWarning("Recipient user {ToUserId} not found", toUserId);
+            _logger.LogWarning("Recipient user {ToUserId} not found", request.RecipientId);
             throw;
         }
         catch (ArgumentException ex)
         {
             _logger.LogWarning("Invalid recipient userId received from user {UserId}", GetUserId());
             throw;
-        }*/
+        }
         
         try
         {