test to make server

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)
     {