Dev #29968 admin variable for limit loans duration

library/Class/Album/UsageConstraint.php

@@ -70,7 +70,12 @@ class Class_Album_UsageConstraint extends Storm_Model_Abstract {
public function getDuration() {
-    return (int)$this->getDatas()->get(self::DURATION);
+    $pnb_duration = (int)$this->getDatas()->get(self::DURATION);
+    $max_duration = (int)Class_AdminVar::get('DILICOM_PNB_MAX_LOAN_DURATION');
+    if (!$max_duration)
+      return $pnb_duration;
+
+    return min($max_duration, $pnb_duration);
}