From 02bbf5e2f1fa78527be216d00851d07546b78ce0 Mon Sep 17 00:00:00 2001
From: "byte[]" <byteslice@airmail.cc>
Date: Tue, 11 Aug 2020 01:14:00 -0400
Subject: [PATCH] fixes invisible error message for comment rate limit, weird
 nesting error for tag updates, e.g. derpibooru/philomena#169

---
 lib/philomena_web/plugs/limit_plug.ex | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/lib/philomena_web/plugs/limit_plug.ex b/lib/philomena_web/plugs/limit_plug.ex
index caf46337..5aa4f9f9 100644
--- a/lib/philomena_web/plugs/limit_plug.ex
+++ b/lib/philomena_web/plugs/limit_plug.ex
@@ -45,6 +45,12 @@ defmodule PhilomenaWeb.LimitPlug do
       is_staff(conn.assigns.current_user) ->
         conn
 
+      ajax?(conn) ->
+        conn
+        |> Controller.put_flash(:error, error)
+        |> Conn.send_resp(:multiple_choices, "")
+        |> Conn.halt()
+
       true ->
         conn
         |> Controller.put_flash(:error, error)
@@ -60,4 +66,11 @@ defmodule PhilomenaWeb.LimitPlug do
 
   defp current_user_id(%{id: id}), do: id
   defp current_user_id(_), do: nil
+
+  defp ajax?(conn) do
+    case Conn.get_req_header(conn, "x-requested-with") do
+      [value] -> String.downcase(value) == "xmlhttprequest"
+      _ -> false
+    end
+  end
 end