From 85c32df256bf400d1b4b340eafd86624673514e9 Mon Sep 17 00:00:00 2001
From: Atralupus <me@atralupus.com>
Date: Thu, 20 Nov 2025 14:41:25 +0900
Subject: [PATCH] Add CalcAOFailedExceptionFilter to handle specific exception
 in Startup configuration

---
 .../Filters/CalcAOFailedExceptionFilter.cs    | 20 +++++++++++++++++++
 ArenaService/Setup.cs                         |  2 ++
 2 files changed, 22 insertions(+)
 create mode 100644 ArenaService/Filters/CalcAOFailedExceptionFilter.cs

diff --git a/ArenaService/Filters/CalcAOFailedExceptionFilter.cs b/ArenaService/Filters/CalcAOFailedExceptionFilter.cs
new file mode 100644
index 0000000..99124f4
--- /dev/null
+++ b/ArenaService/Filters/CalcAOFailedExceptionFilter.cs
@@ -0,0 +1,20 @@
+namespace ArenaService.Filter;
+
+using ArenaService.Shared.Exceptions;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.Filters;
+
+public class CalcAOFailedExceptionFilter : IExceptionFilter
+{
+    public void OnException(ExceptionContext context)
+    {
+        if (context.Exception is CalcAOFailedException)
+        {
+            context.Result = new ObjectResult(new { error = "Total ranking count is under 40." })
+            {
+                StatusCode = StatusCodes.Status423Locked,
+            };
+            context.ExceptionHandled = true;
+        }
+    }
+}
diff --git a/ArenaService/Setup.cs b/ArenaService/Setup.cs
index 0129fbb..dd2d089 100644
--- a/ArenaService/Setup.cs
+++ b/ArenaService/Setup.cs
@@ -10,6 +10,7 @@ namespace ArenaService;
 using ArenaService.Options;
 using ArenaService.Services;
 using ArenaService.Shared.Data;
+using ArenaService.Shared.Exceptions;
 using ArenaService.Shared.Jwt;
 using ArenaService.Shared.Repositories;
 using ArenaService.Shared.Services;
@@ -85,6 +86,7 @@ headlessOptions.Value.JwtSecretKey is not null
                 options.Filters.Add<CacheExceptionFilter>();
                 options.Filters.Add<NotRegisteredUserExceptionFilter>();
                 options.Filters.Add<NotEnoughMedalExceptionFilter>();
+                options.Filters.Add<CalcAOFailedExceptionFilter>();
             })
             .AddNewtonsoftJson(options =>
             {