Optimized linked shows schedule filling

* Fairly big improvement in memory usage and execution time for 24 hour linked
  shows (memory usage no longer grows with show length)

airtime_mvc/application/models/airtime/CcShow.php

@@ -281,6 +281,14 @@ class CcShow extends BaseCcShow {
         return $instanceIds;
     }
     
+    public function getFutureInstanceIds() {
+        $instanceIds = array();
+        foreach ($this->getFutureCcShowInstancess() as $ccShowInstance) {
+            $instanceIds[] = $ccShowInstance->getDbId();
+        }
+        return $instanceIds;
+    }
+
     public function getOtherInstances($instanceId)
     {
         return CcShowInstancesQuery::create()

airtime_mvc/application/services/SchedulerService.php

@@ -161,12 +161,26 @@ class Application_Service_SchedulerService
             return;
         }
 
-        $schedule_sql = "SELECT * FROM cc_schedule ".
+       $doesAnyShowInstanceHaveContent = false;
-            "WHERE instance_id IN (".implode($instanceIds, ",").")";
+       foreach ($instanceIds as $instanceId)
+       {
+            $schedule_sql = "SELECT instance_id FROM cc_schedule ".
+                "WHERE instance_id=$instanceId";//#IN (".implode($instanceIds, ",").")";
             $ccSchedules = Application_Common_Database::prepareAndExecute(
                 $schedule_sql);
-
             if (count($ccSchedules) > 0) {
+                $doesAnyShowInstanceHaveContent = true;
+                break;
+            }
+       }
+
+       if ($doesAnyShowInstanceHaveContent == false)
+       {
+            //The linked shows are all empty, so there's nothing for us to do.
+            //(No content should be propagated to the other show instances...
+            return;
+       }               
+
     /* Find the show contents of just one of the instances. It doesn't
      * matter which instance we use since all the content is the same
      */
@@ -185,10 +199,16 @@ class Application_Service_SchedulerService
 
     //need to find out which linked instances are empty
     $values = array();
-            foreach ($instanceIds as $id) {
+    $futureInstanceIds = $ccShow->getFutureInstanceIds();
+    $con = Propel::getConnection();
+    try {
+        $con->beginTransaction();
+           foreach ($instanceIds as $id) 
+            {
                $instanceSched_sql = "SELECT * FROM cc_schedule ".
                    "WHERE instance_id = {$id} ".
                    "ORDER by starts";
+
                $ccSchedules = Application_Common_Database::prepareAndExecute(
                    $instanceSched_sql);
 
@@ -197,7 +217,8 @@ class Application_Service_SchedulerService
                 * (The show stamp is taken from the first show instance's content)
                 */
                if (count($ccSchedules) < 1 || 
-                    self::replaceInstanceContentCheck($ccSchedules, $showStamp)) {
+                   self::replaceInstanceContentCheck($ccSchedules, $showStamp)) 
+                {
 
                    $instanceStart_sql = "SELECT starts FROM cc_show_instances ".
                        "WHERE id = {$id} ".
@@ -207,6 +228,9 @@ class Application_Service_SchedulerService
                            $instanceStart_sql, array(), Application_Common_Database::COLUMN),
                        new DateTimeZone("UTC"));
 
+                   $defaultCrossfadeDuration = Application_Model_Preference::GetDefaultCrossfadeDuration();
+                   unset($values);
+                   $values = array();
                    foreach ($showStamp as $item) {
                        $endTimeDT = self::findEndTime($nextStartDT, $item["clip_length"]);
 
@@ -231,10 +255,9 @@ class Application_Service_SchedulerService
                            "{$item["position"]})";
 
                        $nextStartDT = self::findTimeDifference($endTimeDT,
-                            Application_Model_Preference::GetDefaultCrossfadeDuration());
+                           $defaultCrossfadeDuration);
+
                    } //foreach show item
-                }
-            } //foreach linked instance
 
                     if (!empty($values)) {
                         $insert_sql = "INSERT INTO cc_schedule (starts, ends, ".
@@ -244,6 +267,9 @@ class Application_Service_SchedulerService
 
                         Application_Common_Database::prepareAndExecute(
                             $insert_sql, array(), Application_Common_Database::EXECUTE);
+                    }
+               }
+           } //foreach linked instance
 
             //update time_filled in cc_show_instances
             $now = gmdate("Y-m-d H:i:s");
@@ -253,9 +279,14 @@ class Application_Service_SchedulerService
                 "WHERE show_id = {$ccShow->getDbId()}";
             Application_Common_Database::prepareAndExecute(
                 $update_sql, array(), Application_Common_Database::EXECUTE);
-            }
 
-        } //if at least one linked instance has content
+           $con->commit();
+           Logging::info("finished fill");
+        } catch (Exception $e) {
+            $con->rollback();
+            Logging::info("Error filling linked shows: ".$e->getMessage());
+            exit();
+        }
     }
 
     public static function fillPreservedLinkedShowContent($ccShow, $showStamp)