CC-4961: Show linking

Refactored services
Removed ShowDaysService and ShowInstanceService
Combined all show actions into one ShowService

airtime_mvc/application/models/airtime/CcSubjs.php

@@ -19,4 +19,12 @@ class CcSubjs extends BaseCcSubjs {
     {
         return $this->type === UTYPE_ADMIN || $this->type === UTYPE_PROGRAM_MANAGER;
     }
+
+    public function isHostOfShow($showId)
+    {
+        return CcShowHostsQuery::create()
+            ->filterByDbShow($showId)
+            ->filterByDbHost($this->getDbId())
+            ->count() > 0;
+    }
 } // CcSubjs