✨ Update sticker controller

DysonNetwork.Sphere/Sticker/StickerController.cs

@@ -339,6 +339,21 @@ public class StickerController(AppDatabase db, StickerService st, FileService.Fi
         return Ok(sticker);
     }
 
+    [HttpGet("{packId:guid}/own")]
+    [Authorize]
+    public async Task<ActionResult<StickerPackOwnership>> GetStickerPackOwnership(Guid packId)
+    {
+        if (HttpContext.Items["CurrentUser"] is not Account currentUser)
+            return Unauthorized();
+        var accountId = Guid.Parse(currentUser.Id);
+
+        var ownership = await db.StickerPackOwnerships
+            .Where(p => p.PackId == packId && p.AccountId == accountId)
+            .FirstOrDefaultAsync();
+        if (ownership is null) return NotFound();
+        return Ok(ownership);
+    }
+
     [HttpPost("{packId:guid}/own")]
     [Authorize]
     public async Task<ActionResult<StickerPackOwnership>> AcquireStickerPack([FromRoute] Guid packId)
@@ -351,6 +366,11 @@ public class StickerController(AppDatabase db, StickerService st, FileService.Fi
             .FirstOrDefaultAsync();
         if (pack is null) return NotFound();
 
+        var existingOwnership = await db.StickerPackOwnerships
+            .Where(p => p.PackId == packId && p.AccountId == Guid.Parse(currentUser.Id))
+            .FirstOrDefaultAsync();
+        if (existingOwnership is not null) return Ok(existingOwnership);
+
         var ownership = new StickerPackOwnership
         {
             PackId = packId,