✨ Get user blocked users infra

DysonNetwork.Sphere/Account/RelationshipController.cs

@@ -230,4 +230,24 @@ public class RelationshipController(AppDatabase db, RelationshipService rels) :
             return BadRequest(err.Message);
         }
     }
+    
+    [HttpDelete("{userId:guid}/block")]
+    [Authorize]
+    public async Task<ActionResult<Relationship>> UnblockUser(Guid userId)
+    {
+        if (HttpContext.Items["CurrentUser"] is not Account currentUser) return Unauthorized();
+
+        var relatedUser = await db.Accounts.FindAsync(userId);
+        if (relatedUser is null) return NotFound("Account was not found.");
+
+        try
+        {
+            var relationship = await rels.UnblockAccount(currentUser, relatedUser);
+            return relationship;
+        }
+        catch (InvalidOperationException err)
+        {
+            return BadRequest(err.Message);
+        }
+    }
 }

DysonNetwork.Sphere/Account/RelationshipService.cs

@@ -7,6 +7,7 @@ namespace DysonNetwork.Sphere.Account;
 public class RelationshipService(AppDatabase db, ICacheService cache)
 {
     private const string UserFriendsCacheKeyPrefix = "accounts:friends:";
+    private const string UserBlockedCacheKeyPrefix = "accounts:blocked:";
     
     public async Task<bool> HasExistingRelationship(Guid accountId, Guid relatedId)
     {
@@ -51,8 +52,7 @@ public class RelationshipService(AppDatabase db, ICacheService cache)
         db.AccountRelationships.Add(relationship);
         await db.SaveChangesAsync();
         
-        await cache.RemoveAsync($"{UserFriendsCacheKeyPrefix}{relationship.AccountId}");
+        await PurgeRelationshipCache(sender.Id, target.Id);
-        await cache.RemoveAsync($"{UserFriendsCacheKeyPrefix}{relationship.RelatedId}");
 
         return relationship;
     }
@@ -64,6 +64,18 @@ public class RelationshipService(AppDatabase db, ICacheService cache)
         return await CreateRelationship(sender, target, RelationshipStatus.Blocked);
     }
     
+    public async Task<Relationship> UnblockAccount(Account sender, Account target)
+    {
+        var relationship = await GetRelationship(sender.Id, target.Id, RelationshipStatus.Blocked);
+        if (relationship is null) throw new ArgumentException("There is no relationship between you and the user.");
+        db.Remove(relationship);
+        await db.SaveChangesAsync();
+        
+        await PurgeRelationshipCache(sender.Id, target.Id);
+        
+        return relationship;
+    }
+
     public async Task<Relationship> SendFriendRequest(Account sender, Account target)
     {
         if (await HasExistingRelationship(sender.Id, target.Id))
@@ -92,8 +104,7 @@ public class RelationshipService(AppDatabase db, ICacheService cache)
             .Where(r => r.AccountId == accountId && r.RelatedId == relatedId && r.Status == RelationshipStatus.Pending)
             .ExecuteDeleteAsync();
         
-        await cache.RemoveAsync($"{UserFriendsCacheKeyPrefix}{accountId}");
+        await PurgeRelationshipCache(relationship.AccountId, relationship.RelatedId);
-        await cache.RemoveAsync($"{UserFriendsCacheKeyPrefix}{relatedId}");
     }
     
     public async Task<Relationship> AcceptFriendRelationship(
@@ -122,8 +133,7 @@ public class RelationshipService(AppDatabase db, ICacheService cache)
 
         await db.SaveChangesAsync();
 
-        await cache.RemoveAsync($"{UserFriendsCacheKeyPrefix}{relationship.AccountId}");
+        await PurgeRelationshipCache(relationship.AccountId, relationship.RelatedId);
-        await cache.RemoveAsync($"{UserFriendsCacheKeyPrefix}{relationship.RelatedId}");
 
         return relationshipBackward;
     }
@@ -137,15 +147,14 @@ public class RelationshipService(AppDatabase db, ICacheService cache)
         db.Update(relationship);
         await db.SaveChangesAsync();
         
-        await cache.RemoveAsync($"{UserFriendsCacheKeyPrefix}{accountId}");
+        await PurgeRelationshipCache(accountId, relatedId);
-        await cache.RemoveAsync($"{UserFriendsCacheKeyPrefix}{relatedId}");
         
         return relationship;
     }
 
     public async Task<List<Guid>> ListAccountFriends(Account account)
     {
-        string cacheKey = $"{UserFriendsCacheKeyPrefix}{account.Id}";
+        var cacheKey = $"{UserFriendsCacheKeyPrefix}{account.Id}";
         var friends = await cache.GetAsync<List<Guid>>(cacheKey);
         
         if (friends == null)
@@ -162,10 +171,37 @@ public class RelationshipService(AppDatabase db, ICacheService cache)
         return friends ?? [];
     }
     
+    public async Task<List<Guid>> ListAccountBlocked(Account account)
+    {
+        var cacheKey = $"{UserBlockedCacheKeyPrefix}{account.Id}";
+        var blocked = await cache.GetAsync<List<Guid>>(cacheKey);
+        
+        if (blocked == null)
+        {
+            blocked = await db.AccountRelationships
+                .Where(r => r.RelatedId == account.Id)
+                .Where(r => r.Status == RelationshipStatus.Blocked)
+                .Select(r => r.AccountId)
+                .ToListAsync();
+                
+            await cache.SetAsync(cacheKey, blocked, TimeSpan.FromHours(1));
+        }
+
+        return blocked ?? [];
+    }
+
     public async Task<bool> HasRelationshipWithStatus(Guid accountId, Guid relatedId,
         RelationshipStatus status = RelationshipStatus.Friends)
     {
         var relationship = await GetRelationship(accountId, relatedId, status);
         return relationship is not null;
     }
+    
+    private async Task PurgeRelationshipCache(Guid accountId, Guid relatedId)
+    {
+        await cache.RemoveAsync($"{UserFriendsCacheKeyPrefix}{accountId}");
+        await cache.RemoveAsync($"{UserFriendsCacheKeyPrefix}{relatedId}");
+        await cache.RemoveAsync($"{UserBlockedCacheKeyPrefix}{accountId}");
+        await cache.RemoveAsync($"{UserBlockedCacheKeyPrefix}{relatedId}");
+    }
 }

DysonNetwork.Sphere/Activity/ActivityService.cs

@@ -126,7 +126,7 @@ public class ActivityService(
         var activities = new List<Activity>();
         var userFriends = await rels.ListAccountFriends(currentUser);
         var userPublishers = await pub.GetUserPublishers(currentUser.Id);
-        debugInclude ??= new HashSet<string>();
+        debugInclude ??= [];
 
         if (string.IsNullOrEmpty(filter))
         {