test to make server

Govor.Application/Interfaces/Friends/IFriendshipService.cs

@@ -5,5 +5,6 @@ namespace Govor.Application.Interfaces.Friends;
 public interface IFriendshipService
 {
     Task<List<User>> GetFriendsAsync(Guid userId);
+    Task<List<User>> GetPotentialFriendsAsync(Guid userId);
     Task<List<User>> SearchUsersAsync(string query, Guid currentId);
 }

Govor.Application/Interfaces/IMessagesLoader.cs

@@ -4,6 +4,6 @@ namespace Govor.Application.Interfaces;
 
 public interface IMessagesLoader
 {
-    Task<List<Message>> LoadMessagesInUserChat(Guid userId,Guid currentId, Guid? startMessageId, int before = 20, int after = 2);
+    Task<List<Message>> LoadMessagesInUserChat(Guid privateChatId,Guid currentId, Guid? startMessageId, int before = 20, int after = 2);
     Task<List<Message>> LoadMessagesInChatGroup(Guid chatId,Guid currentId, Guid? startMessageId, int before = 20, int after = 2);
 }

Govor.Application/Interfaces/ISynchingService.cs

@@ -0,0 +1,11 @@
+namespace Govor.Application.Interfaces;
+
+public interface ISynchingService
+{
+    /// <summary>
+    /// Brings all line breaks (CRLF, CR) to a single LF(\n) standard.
+    /// </summary>
+    /// <param name="input">The original line containing the line break.</param>
+    /// <returns>A string normalized using only \n.</returns>
+    string NormalizeNewlines(string input);
+}

Govor.Application/Interfaces/IUserGroupsGetterService.cs

@@ -2,7 +2,7 @@ using Govor.Core.Models;
 
 namespace Govor.Application.Interfaces;
 
-public interface IUserGroupsService
+public interface IUserGroupsGetterService
 {
     Task<List<ChatGroup>> GetUserGroupsAsync(Guid userId);
 }

Govor.Application/Interfaces/IUserPrivateChatsGetterService.cs

@@ -0,0 +1,8 @@
+using Govor.Core.Models;
+
+namespace Govor.Application.Interfaces;
+
+public interface IUserPrivateChatsGetterService
+{ 
+    Task<List<PrivateChat>> GetUserChatsAsync(Guid userId);
+}

Govor.Application/Interfaces/Medias/IMediaService.cs

@@ -9,6 +9,8 @@ public interface IMediaService
     public Task DeleteMediaAsync(Guid fileId);
     public Task<Media> GetMediaByUrlAsync(string url);
     public Task<Media> GetMediaByIdAsync(Guid mediaId);
+    public Task<bool> HasMediaAsync(Guid mediaId);
+    public Task<bool> HasMediaByUrlAsync(string url);
     Task AttachToMessageAsync(Guid mediaId, Guid messageId);
 }
 

Govor.Application/Interfaces/UserOnlineStatus/IOnlineUserStore.cs

@@ -2,8 +2,9 @@ namespace Govor.Application.Interfaces.UserOnlineStatus;
 
 public interface IOnlineUserStore
 {
-    void SetOnlineUser(Guid userId);
-    void SetOfflineUser(Guid userId);
+    bool AddConnection(Guid userId, string connectionId);
+    bool RemoveConnection(Guid userId, string connectionId);
     bool IsOnline(Guid userId);
+    IEnumerable<string> GetConnections(Guid userId);
     IReadOnlyCollection<Guid> GetAllOnlineUsers();
 }

Govor.Application/Services/Authentication/JwtTokenHasher.cs

@@ -1,16 +1,32 @@
+using System.Security.Cryptography;
+using System.Text;
 using Govor.Application.Interfaces.Authentication;
+using Microsoft.Extensions.Configuration;
 
 namespace Govor.Application.Services.Authentication;
 
 public class JwtTokenHasher : IJwtTokenHasher
 {
+    private readonly string _pepper;
+
+    public JwtTokenHasher(IConfiguration config)
+    {
+        _pepper = config["EncryptionOption:Secret"] ?? "D1fault%Lxng%Randxm^Secret^Key(123!";
+    }
+
     public string HashToken(string token)
     {
-        return BCrypt.Net.BCrypt.HashPassword(token, workFactor: 13);
+        using var hmac = new HMACSHA256(Encoding.UTF8.GetBytes(_pepper));
+        var bytes = Encoding.UTF8.GetBytes(token);
+        var hash = hmac.ComputeHash(bytes);
+        return Convert.ToBase64String(hash);
     }
 
     public bool VerifyToken(string token, string storedHash)
     {
-        return BCrypt.Net.BCrypt.Verify(token, storedHash);
+        var currentHashBytes = Encoding.UTF8.GetBytes(HashToken(token));
+        var storedHashBytes = Encoding.UTF8.GetBytes(storedHash);
+        
+        return CryptographicOperations.FixedTimeEquals(currentHashBytes, storedHashBytes);
     }
 }

Govor.Application/Services/Friends/FriendRequestCommandService.cs

@@ -19,20 +19,35 @@ public class FriendRequestCommandService : IFriendRequestCommandService
     {
         if (fromUserId == toUserId)
             throw new InvalidOperationException("Cannot send a request to self user");
+        
+        var friendship = await _friendshipsRepository.GetFriendshipAsync(fromUserId, toUserId);
 
-        if (_friendshipsRepository.Exist(fromUserId, toUserId))
-            throw new RequestAlreadySentException(fromUserId, toUserId);
-
-        var friendship = new Friendship
+        if (friendship is null)
         {
-            Id = Guid.NewGuid(),
-            RequesterId = fromUserId,
-            AddresseeId = toUserId,
-            Status = FriendshipStatus.Pending
-        };
-        
-        await _friendshipsRepository.AddAsync(friendship);
+            friendship = new Friendship
+            {
+                Id = Guid.NewGuid(),
+                RequesterId = fromUserId,
+                AddresseeId = toUserId,
+                Status = FriendshipStatus.Pending
+            };
+            await _friendshipsRepository.AddAsync(friendship);
+        }
+        else
+        {
+            if (friendship.Status == FriendshipStatus.Pending || friendship.Status == FriendshipStatus.Accepted
+                                                              || friendship.Status == FriendshipStatus.Blocked)
+            {
+                throw new RequestAlreadySentException(fromUserId, toUserId);
+            }
+            
+            friendship.RequesterId = fromUserId;
+            friendship.AddresseeId = toUserId;
+            friendship.Status = FriendshipStatus.Pending;
         
+            await _friendshipsRepository.UpdateAsync(friendship);
+        }
+
         return friendship;
     }
 

Govor.Application/Services/Friends/FriendshipService.cs

@@ -19,6 +19,7 @@ public class FriendshipService : IFriendshipService
         _friendshipsRepository = friendshipsRepository;
     }
 
+
     public async Task<List<User>> SearchUsersAsync(string query, Guid currentId)
     {
         List<User> all = new List<User>();
@@ -42,6 +43,23 @@ public class FriendshipService : IFriendshipService
             throw new UnauthorizedAccessException($"When we try find friends by pattern {query} something wrong", ex);
         }
     }
+    
+    public async Task<List<User>> GetPotentialFriendsAsync(Guid userId)
+    {
+        try
+        {
+            var friendships = await _friendshipsRepository.FindByUserIdAsync(userId);
+
+            return friendships
+                .Where(f => f.Status == FriendshipStatus.Pending)
+                .Select(f => f.RequesterId == userId ? f.Addressee : f.Requester)
+                .ToList();
+        }
+        catch (NotFoundByKeyException<Guid> ex)
+        {
+            throw new InvalidOperationException("Nothing was found for the specified id.", ex);
+        }
+    }
 
     public async Task<List<User>> GetFriendsAsync(Guid userId)
     {

Govor.Application/Services/Medias/MediaService.cs

@@ -100,6 +100,19 @@ public class MediaService : IMediaService
             throw;
         }
     }
+
+    public async Task<bool> HasMediaAsync(Guid mediaId)
+    {
+        return await _dbContext.MediaFiles.AsNoTracking()
+            .FirstOrDefaultAsync(x => x.Id == mediaId) is not null;
+    }
+
+    public async Task<bool> HasMediaByUrlAsync(string url)
+    {
+        return await _dbContext.MediaFiles.AsNoTracking()
+            .FirstOrDefaultAsync(x => x.Url == url) is not null;
+    }
+
     public async Task AttachToMessageAsync(Guid mediaId, Guid messageId)
     {
         var mediaFile = await _dbContext.MediaFiles

Govor.Application/Services/Messages/MessageCommandService.cs

@@ -51,12 +51,22 @@ public class MessageCommandService : IMessageCommandService
             {
                 if (!await _usersRepository.ExistsByIdAsync(sendParams.RecipientId))
                 {
-                    _logger.LogWarning("Attempt to send message to non-existent user {RecipientId}", sendParams.RecipientId);
-                    return new SendMessageResult(false, new KeyNotFoundException($"Recipient user {sendParams.RecipientId} not found."), default);
+                    if (!_privateChats.Exist(sendParams.RecipientId))
+                    {
+                        _logger.LogWarning("Attempt to send message to non-existent user {RecipientId}", sendParams.RecipientId);
+                        return new SendMessageResult(false, new KeyNotFoundException($"Recipient user {sendParams.RecipientId} not found."), default);
+                    }
+                    else
+                    {
+                        recipientId = sendParams.RecipientId;
+                    }
+                }
+                else
+                {
+                    // Verify friendship for private messages
+                    await _verifyFriendship.VerifyAsync(sendParams.FromUserId, sendParams.RecipientId);
+                    recipientId = await GetPrivateChatsIdAsync(sendParams.FromUserId, sendParams.RecipientId);
                 }
-                // Verify friendship for private messages
-                await _verifyFriendship.VerifyAsync(sendParams.FromUserId, sendParams.RecipientId);
-                recipientId = await GetPrivateChatsIdAsync(sendParams.FromUserId, sendParams.RecipientId);
             }
             else if (sendParams.RecipientType == RecipientType.Group)
             {

Govor.Application/Services/Messages/MessagesLoader.cs

@@ -25,26 +25,24 @@ public class MessagesLoader : IMessagesLoader
     }
     
     public async Task<List<Message>> LoadMessagesInUserChat(
-        Guid userId,
+        Guid privateChatId,
         Guid currentUser,
         Guid? startMessageId,
         int before = 20,
         int after = 2)
     {
-        if (userId == Guid.Empty)
-            throw new ArgumentException("User id cannot be empty");
+        if (privateChatId == Guid.Empty)
+            throw new ArgumentException("PrivateChatId id cannot be empty");
 
-        if (!_privateChatsRepository.Exist(userId, currentUser))
+        if (!_privateChatsRepository.Exist(privateChatId))
             throw new InvalidOperationException("Private chat not found");
-
-        var chat = await _privateChatsRepository.GetByMembersAsync(userId, currentUser);
-
+        
         var query = _dbContext.Messages
             .AsNoTracking()
             .Include(m => m.MediaAttachments)
             .ThenInclude(m => m.MediaFile)
             .Where(m => m.RecipientType == RecipientType.User &&
-                        m.RecipientId == chat.Id);
+                        m.RecipientId == privateChatId);
 
         if (startMessageId is null)
         {

Govor.Application/Services/SynchingService.cs

@@ -0,0 +1,20 @@
+using Govor.Application.Interfaces;
+
+namespace Govor.Application.Services;
+
+public class SynchingService : ISynchingService
+{
+    public string NormalizeNewlines(string input)
+    {
+        if (string.IsNullOrEmpty(input))
+        {
+            return input;
+        }
+        
+        string normalized = input.Replace("\r\n", "\n");
+        
+        normalized = normalized.Replace('\r', '\n');
+
+        return normalized;
+    }
+}

Govor.Application/Services/UserGroupsGetterService.cs

@@ -5,11 +5,11 @@ using Govor.Data.Repositories.Exceptions;
 
 namespace Govor.Application.Services;
 
-public class UserGroupsService : IUserGroupsService
+public class UserGroupsGetterService : IUserGroupsGetterService
 {
     private readonly IGroupsRepository _groupRep;
     
-    public UserGroupsService(IGroupsRepository groupsRepository)
+    public UserGroupsGetterService(IGroupsRepository groupsRepository)
     {
         _groupRep = groupsRepository;
     }

Govor.Application/Services/UserOnlineStatus/OnlineUserStore.cs

@@ -5,25 +5,68 @@ namespace Govor.Application.Services.UserOnlineStatus;
 
 public class OnlineUserStore : IOnlineUserStore
 {
-    private readonly ConcurrentDictionary<Guid, DateTime> _onlineUsers = new();
+    private readonly ConcurrentDictionary<Guid, HashSet<string>> _userConnections = new();
 
-    public void SetOnlineUser(Guid userId)
+    public bool AddConnection(Guid userId, string connectionId)
     {
-        _onlineUsers[userId] = DateTime.UtcNow;
+        bool isFirstConnection = false;
+
+        _userConnections.AddOrUpdate(userId, 
+            _ => {
+                isFirstConnection = true;
+                return new HashSet<string> { connectionId };
+            },
+            (_, connections) => {
+                lock (connections)
+                {
+                    if (connections.Count == 0) isFirstConnection = true;
+                    connections.Add(connectionId);
+                }
+                return connections;
+            });
+
+        return isFirstConnection;
     }
 
-    public void SetOfflineUser(Guid userId)
+    public bool RemoveConnection(Guid userId, string connectionId)
     {
-        _onlineUsers.TryRemove(userId, out _);
+        bool isLastConnection = false;
+
+        if (_userConnections.TryGetValue(userId, out var connections))
+        {
+            lock (connections)
+            {
+                connections.Remove(connectionId);
+                if (connections.Count == 0)
+                {
+                    isLastConnection = true;
+                    _userConnections.TryRemove(userId, out _);
+                }
+            }
+        }
+
+        return isLastConnection;
+    }
+
+    public IEnumerable<string> GetConnections(Guid userId)
+    {
+        if (_userConnections.TryGetValue(userId, out var connections))
+        {
+            lock (connections)
+            {
+                return connections.ToList();
+            }
+        }
+        return Enumerable.Empty<string>();
     }
 
     public bool IsOnline(Guid userId)
     {
-        return _onlineUsers.ContainsKey(userId);
+        return _userConnections.TryGetValue(userId, out var connections) && connections.Count > 0;
     }
 
     public IReadOnlyCollection<Guid> GetAllOnlineUsers()
     {
-        return _onlineUsers.Keys.ToList();
+        return _userConnections.Keys.ToList();
     }
-}
+}

Govor.Application/Services/UserOnlineStatus/UserNotificationScopeService.cs

@@ -26,7 +26,7 @@ public class UserNotificationScopeService : IUserNotificationScopeService
         }
         catch (NotFoundByKeyException<Guid> ex)
         {
-            _logger.LogError(ex, ex.Message);
+            _logger.LogWarning(ex, ex.Message);
             throw new InvalidOperationException("User not found");
         }
     }

Govor.Application/Services/UserPrivateChatsGetter.cs

@@ -0,0 +1,28 @@
+using Govor.Application.Interfaces;
+using Govor.Core.Models;
+using Govor.Core.Repositories.PrivateChats;
+using Govor.Data.Repositories.Exceptions;
+
+namespace Govor.Application.Services;
+
+public class UserPrivateChatsGetter : IUserPrivateChatsGetterService
+{
+    private readonly IPrivateChatsRepository _groupRep;
+    
+    public UserPrivateChatsGetter(IPrivateChatsRepository groupsRepository)
+    {
+        _groupRep = groupsRepository;
+    }
+    
+    public async Task<List<PrivateChat>> GetUserChatsAsync(Guid userId)
+    {
+        try
+        {
+            return await _groupRep.GetAllOfUser(userId);
+        }
+        catch (NotFoundByKeyException<Guid> ex)
+        {
+            return [];
+        }
+    }
+}

Govor.Application/Services/UserSessions/UserSessionRefresher.cs

@@ -16,6 +16,7 @@ public class UserSessionRefresher : IUserSessionRefresher
     private readonly ILogger<UserSessionRefresher> _logger;
     private readonly IUsersRepository _usersRepository;
     private readonly JwtRefreshOption _options;
+    private readonly IJwtTokenHasher _jwtTokenHasher;
     private readonly IJwtService _jwtService;
 
     public UserSessionRefresher(
@@ -23,12 +24,14 @@ public class UserSessionRefresher : IUserSessionRefresher
         ILogger<UserSessionRefresher> logger,
         IUsersRepository usersRepository,
         IOptions<JwtRefreshOption> options,
+        IJwtTokenHasher jwtTokenHasher,
         IJwtService jwtService)
     {
         _sessionsRepository = sessionsRepository;
         _logger = logger;
         _usersRepository = usersRepository;
         _options = options.Value;
+        _jwtTokenHasher = jwtTokenHasher;
         _jwtService = jwtService;
     }
 
@@ -36,7 +39,8 @@ public class UserSessionRefresher : IUserSessionRefresher
     {
         try
         {
-            var session = await _sessionsRepository.GetByHashedRefreshTokenAsync(refreshToken);
+            
+            var session = await _sessionsRepository.GetByHashedRefreshTokenAsync(_jwtTokenHasher.HashToken(refreshToken));
 
             if (session.IsRevoked || session.ExpiresAt <= DateTime.UtcNow)
                 throw new UnauthorizedAccessException("Refresh token is invalid or expired");
@@ -50,12 +54,14 @@ public class UserSessionRefresher : IUserSessionRefresher
             // New tokens 
             var newAccessToken = await _jwtService.GenerateAccessTokenAsync(user, session.Id);
             var newRefreshToken = await _jwtService.GenerateRefreshTokenAsync(user);
-
+            
+            var newRefreshTokenHash = _jwtTokenHasher.HashToken(newRefreshToken);
+            
             // Opening new session 
             var newSession = new UserSession
             {
                 UserId = user.Id,
-                RefreshTokenHash = newRefreshToken,
+                RefreshTokenHash = newRefreshTokenHash,
                 DeviceInfo = session.DeviceInfo,
                 CreatedAt = DateTime.UtcNow,
                 ExpiresAt = DateTime.UtcNow.AddDays(_options.RefreshTokenLifetimeDays)