From 27da222920081395a16229adb7dde8e032655858 Mon Sep 17 00:00:00 2001
From: Andrew McMillan <andrew@morphoss.com>
Date: Wed, 28 Apr 2010 14:07:23 +1200
Subject: [PATCH] Override the DateTime::modify function with our own.

Since it doesn't handle RRULE durations, but we want to do that.
---
 inc/RRule-v2.php | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/inc/RRule-v2.php b/inc/RRule-v2.php
index f204e7f8..7e617cfb 100644
--- a/inc/RRule-v2.php
+++ b/inc/RRule-v2.php
@@ -141,6 +141,17 @@ class RepeatRuleDateTime extends DateTime {
   }
 
 
+  public function modify( $interval ) {
+    if ( preg_match('{^(-)?P((\d+)D)?T?((\d+)H)?((\d+)M)?$}', $interval, $matches) ) {
+      $interval = $matches[1];
+      if ( isset($matches[2]) && $matches[2] != '' ) $interval .= $matches[3] . ' days ';
+      if ( isset($matches[4]) && $matches[4] != '' ) $interval .= $matches[5] . ' hours ';
+      if ( isset($matches[6]) && $matches[6] != '' ) $interval .= $matches[7] . ' minutes ';
+    }
+    return (string)parent::modify($interval);
+  }
+
+
   public function UTC() {
     $gmt = clone($this);
     if ( isset($this->tzid) && $this->tzid != 'UTC' ) {