better Delete Actor logic

src/BirdsiteLive.Domain/BusinessUseCases/ProcessDeleteUser.cs

@@ -9,6 +9,7 @@ namespace BirdsiteLive.Domain.BusinessUseCases
     {
         Task ExecuteAsync(Follower follower);
         Task ExecuteAsync(string followerUsername, string followerDomain);
+        Task ExecuteAsync(string actorId);
     }
     
     public class ProcessDeleteUser : IProcessDeleteUser
@@ -33,6 +34,15 @@ namespace BirdsiteLive.Domain.BusinessUseCases
             await ExecuteAsync(follower);
         }
 
+        public async Task ExecuteAsync(string actorId)
+        {
+            // Get Follower and Twitter Users
+            var follower = await _followersDal.GetFollowerAsync(actorId);
+            if (follower == null) return;
+
+            await ExecuteAsync(follower);
+        }
+
         public async Task ExecuteAsync(Follower follower)
         {
             // Remove twitter users if no more followers

src/BirdsiteLive.Domain/UserService.cs

@@ -280,15 +280,21 @@ namespace BirdsiteLive.Domain
         public async Task<bool> DeleteRequestedAsync(string signature, string method, string path, string queryString, Dictionary<string, string> requestHeaders,
             ActivityDelete activity, string body)
         {
-            // Validate
-            var sigValidation = await ValidateSignature(activity.actor, signature, method, path, queryString, requestHeaders, body);
-            if (!sigValidation.SignatureIsValidated) return false;
+            if (activity.apObject is string apObject)
+            {
+                if (!string.Equals(activity.actor.Trim(), apObject.Trim(), StringComparison.InvariantCultureIgnoreCase)) return true;
 
-            // Remove user and followings
-            var followerUserName = SigValidationResultExtractor.GetUserName(sigValidation);
-            var followerHost = SigValidationResultExtractor.GetHost(sigValidation);
+                try
+                {
+                    // Validate
+                    var sigValidation = await ValidateSignature(activity.actor, signature, method, path, queryString, requestHeaders, body);
+                    if (!sigValidation.SignatureIsValidated) return false;
+                }
+                catch (FollowerIsGoneException){}
 
-            await _processDeleteUser.ExecuteAsync(followerUserName, followerHost);
+                // Remove user and followings
+                await _processDeleteUser.ExecuteAsync(activity.actor.Trim());
+            }
 
             return true;
         }

src/BirdsiteLive/Controllers/InboxController.cs

@@ -49,14 +49,15 @@ namespace BirdsiteLive.Controllers
                         case "Delete":
                         {
                             var succeeded = await _userService.DeleteRequestedAsync(signature, r.Method, r.Path,
-                                r.QueryString.ToString(), HeaderHandler.RequestHeaders(r.Headers), activity as ActivityDelete, body);
+                                r.QueryString.ToString(), HeaderHandler.RequestHeaders(r.Headers),
+                                activity as ActivityDelete, body);
                             if (succeeded) return Accepted();
                             else return Unauthorized();
                         }
                     }
                 }
             }
-            catch (FollowerIsGoneException) { } //TODO: check if user in DB
+            catch (FollowerIsGoneException) { }
 
             return Accepted();
         }

src/DataAccessLayers/BirdsiteLive.DAL.Postgres/DataAccessLayers/FollowersPostgresDal.cs

@@ -82,6 +82,21 @@ namespace BirdsiteLive.DAL.Postgres.DataAccessLayers
             }
         }
 
+        public async Task<Follower> GetFollowerAsync(string actorId)
+        {
+            var query = $"SELECT * FROM {_settings.FollowersTableName} WHERE actorid = @actorid";
+
+            actorId = actorId.ToLowerInvariant().Trim();
+
+            using (var dbConnection = Connection)
+            {
+                dbConnection.Open();
+
+                var result = (await dbConnection.QueryAsync<SerializedFollower>(query, new { actorId })).FirstOrDefault();
+                return Convert(result);
+            }
+        }
+
         public async Task<Follower[]> GetFollowersAsync(int followedUserId)
         {
             if (followedUserId == default) throw new ArgumentException("followedUserId");

src/DataAccessLayers/BirdsiteLive.DAL/Contracts/IFollowersDal.cs

@@ -7,6 +7,7 @@ namespace BirdsiteLive.DAL.Contracts
     public interface IFollowersDal
     {
         Task<Follower> GetFollowerAsync(string acct, string host);
+        Task<Follower> GetFollowerAsync(string actorId);
         Task CreateFollowerAsync(string acct, string host, string inboxRoute, string sharedInboxRoute, string actorId, int[] followings = null,
             Dictionary<int, long> followingSyncStatus = null);
         Task<Follower[]> GetFollowersAsync(int followedUserId);