From 3c5d30f7579044c05b21803ccd87d60156b3f9c1 Mon Sep 17 00:00:00 2001
From: John Quairia <john@toxicity.be>
Date: Fri, 10 Jul 2026 20:02:33 +0200
Subject: [PATCH] fix: lowercase gameplayFormat values before Frontier
 allowlist check

Unique cards were failing the Frontier check when altered-core returned
gameplayFormat entries with different casing than "frontier".
---
 src/Validator/Format/FrontierFormatValidator.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Validator/Format/FrontierFormatValidator.php b/src/Validator/Format/FrontierFormatValidator.php
index a0ef4c6..de78354 100644
--- a/src/Validator/Format/FrontierFormatValidator.php
+++ b/src/Validator/Format/FrontierFormatValidator.php
@@ -46,7 +46,7 @@ private function validateFrontierUniques(Deck $deck, array $cardsData): array
                 continue;
             }
 
-            $gameplayFormats = $data['gameplayFormat'] ?? [];
+            $gameplayFormats = array_map('strtolower', $data['gameplayFormat'] ?? []);
             if (!in_array(self::GAMEPLAY_FORMAT_KEY, $gameplayFormats, true)) {
                 $errors[] = sprintf('Unique card "%s" is not part of the Frontier format allowlist.', $this->getCardName($data));
             }