From 212205b0ff9ab93cff25431ea60c549f07c2bd74 Mon Sep 17 00:00:00 2001
From: Martin Konecny <martin@localhost.localdomain>
Date: Tue, 22 Nov 2011 18:03:47 -0500
Subject: [PATCH] CC-3070: Scheduling show on the 31st of a month causes
 problem to months that don't have 31 days

-fixed.
---
 airtime_mvc/application/models/Show.php | 37 +++++++++++++++++++++----
 1 file changed, 32 insertions(+), 5 deletions(-)

diff --git a/airtime_mvc/application/models/Show.php b/airtime_mvc/application/models/Show.php
index 2d07001ed..85373d13a 100644
--- a/airtime_mvc/application/models/Show.php
+++ b/airtime_mvc/application/models/Show.php
@@ -1197,12 +1197,39 @@ class Application_Model_Show {
 
             self::createRebroadcastInstances($rebroadcasts, $currentUtcTimestamp, $show_id, $show_instance_id, $start, $duration, $timezone);
 
-            $dt = new DateTime($start, new DateTimeZone($timezone));
-            $dt->add(new DateInterval($p_interval));
-            $start = $dt->format("Y-m-d H:i:s");
 
-            $dt->setTimezone(new DateTimeZone('UTC'));
-            $utcStartDateTime = $dt;
+            if ($p_interval == 'P1M'){
+                /* When adding months, there is a problem if we are on January 31st and add one month with PHP. 
+                 * What ends up happening is that since February 31st doesn't exist, the date returned is
+                 * March 3rd. For now let's ignore the day and assume we are always working with the
+                 * first of each month, and use PHP to add 1 month to this (this will take care of rolling
+                 * over the years 2011->2012, etc.). Then let's append the actual day, and use the php 
+                 * checkdate() function, to see if it is valid. If not, then we'll just skip this month. */
+                
+                $startDt = new DateTime($start, new DateTimeZone($timezone));
+                
+                /* pass in only the year and month (not the day) */
+                $dt = new DateTime($startDt->format("Y-m"), new DateTimeZone($timezone));
+                
+                /* Keep adding 1 month, until we find the next month that contains the day
+                 * we are looking for (31st day for example) */
+                do {
+                    $dt->add(new DateInterval($p_interval));
+                } while(!checkdate($dt->format("m"), $startDt->format("d"), $dt->format("Y")));
+                $dt->setDate($dt->format("Y"), $dt->format("m"), $startDt->format("d"));
+                
+                $start = $dt->format("Y-m-d H:i:s");
+
+                $dt->setTimezone(new DateTimeZone('UTC'));
+                $utcStartDateTime = $dt;
+            } else {
+                $dt = new DateTime($start, new DateTimeZone($timezone));
+                $dt->add(new DateInterval($p_interval));
+                $start = $dt->format("Y-m-d H:i:s");
+
+                $dt->setTimezone(new DateTimeZone('UTC'));
+                $utcStartDateTime = $dt;
+            }
 
         }