fetchLiveVaultBalance: split production/test cache paths so production caching works

includes/utilities.php

@@ -352,39 +352,51 @@ function backfillRunningBalances($pdo, $user) {
  * @return int|null The vault amount in pennies, or null on failure.
  */
 function fetchLiveVaultBalance($user) {
-    static $cache = null;
-
-    if ($cache === null) {
-        $cache = new WeakMap();
-    }
-
-    $hook = $GLOBALS['liveBalanceTestHook'] ?? null;
-    $cacheKey = $hook ?? true;
-
-    if (isset($cache[$cacheKey]) && array_key_exists($user, $cache[$cacheKey])) {
-        return $cache[$cacheKey][$user];
-    }
+    static $prodCache = [];   // production: hook is null, plain per-request array
+    static $testCache = null; // test: keyed by hook closure (weakly held)
 
     if (!array_key_exists($user, USER_KEYS)) {
         return null;
     }
 
-    $url = 'https://api.torn.com/v2/user?selections=money';
-    try {
-        $responseData = $hook !== null
-            ? $hook($url, USER_KEYS[$user])
-            : executeApiCall($url, USER_KEYS[$user]);
+    $hook = $GLOBALS['liveBalanceTestHook'] ?? null;
 
-        if (!isset($responseData['money']['vault'])) {
+    if ($hook === null) {
+        // Production path: plain array cache.
+        if (array_key_exists($user, $prodCache)) {
+            return $prodCache[$user];
+        }
+        try {
+            $responseData = executeApiCall('https://api.torn.com/v2/user?selections=money', USER_KEYS[$user]);
+            if (!isset($responseData['money']['vault'])) {
+                $prodCache[$user] = null;
+                return null;
+            }
+            $prodCache[$user] = (int)$responseData['money']['vault'];
+            return $prodCache[$user];
+        } catch (Exception $e) {
+            $prodCache[$user] = null;
             return null;
         }
+    }
 
-        if (!isset($cache[$cacheKey])) {
-            $cache[$cacheKey] = [];
+    // Test path: key by hook identity so test scenarios get fresh fetches.
+    if ($testCache === null) {
+        $testCache = new \WeakMap();
+    }
+    if (isset($testCache[$hook]) && array_key_exists($user, $testCache[$hook])) {
+        return $testCache[$hook][$user];
+    }
+    try {
+        $responseData = $hook('https://api.torn.com/v2/user?selections=money', USER_KEYS[$user]);
+        if (!isset($responseData['money']['vault'])) {
+            $testCache[$hook] = [$user => null];
+            return null;
         }
-        $cache[$cacheKey][$user] = (int)$responseData['money']['vault'];
-        return $cache[$cacheKey][$user];
+        $testCache[$hook] = [$user => (int)$responseData['money']['vault']];
+        return $testCache[$hook][$user];
     } catch (Exception $e) {
+        $testCache[$hook] = [$user => null];
         return null;
     }
 }