From 1b11a16fe45241d025e5158e1888f98239c6762d Mon Sep 17 00:00:00 2001
From: Jonathan Goode <u01jmg3@gmail.com>
Date: Tue, 2 Apr 2019 23:44:41 +0100
Subject: [PATCH] RE: #212 - support every month's last day

---
 examples/ICal.ics | 14 ++++++++++++++
 src/ICal/ICal.php | 10 ++++++----
 2 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/examples/ICal.ics b/examples/ICal.ics
index f7ebd84..117a14b 100644
--- a/examples/ICal.ics
+++ b/examples/ICal.ics
@@ -229,6 +229,20 @@ SUMMARY;LANGUAGE=en-gb:BYSETPOS First weekday of every month
 TRANSP:TRANSPARENT
 END:VEVENT
 BEGIN:VEVENT
+DTSTART;VALUE=DATE:20190131
+DTEND;VALUE=DATE:20190131
+DTSTAMP;TZID="GMT Standard Time":20190121T195741Z
+RRULE:FREQ=MONTHLY;INTERVAL=1;BYDAY=SU,MO,TU,WE,TH,FR,SA;BYSETPOS=-1
+UID:4dnsuc3nknin15kv25cn7ridssx@google.com
+CREATED:20190119T142059Z
+DESCRIPTION;LANGUAGE=en-gb:BYSETPOS Last day of every month
+LAST-MODIFIED:20190409T150000Z
+SEQUENCE:0
+STATUS:CONFIRMED
+SUMMARY;LANGUAGE=en-gb:BYSETPOS Last day of every month
+TRANSP:TRANSPARENT
+END:VEVENT
+BEGIN:VEVENT
 DTSTART;VALUE=DATE:20170301
 DTEND;VALUE=DATE:20170301
 DTSTAMP;TZID="GMT Standard Time":20170121T195741Z
diff --git a/src/ICal/ICal.php b/src/ICal/ICal.php
index acb1730..1ad0ec2 100644
--- a/src/ICal/ICal.php
+++ b/src/ICal/ICal.php
@@ -1292,7 +1292,9 @@ protected function processRecurrences()
 
                                 $byDaysCounted = array_count_values(explode(',', $rrules['BYDAY']));
 
-                                if ($byDaysCounted == array_count_values(array_slice($this->weeks['MO'], 0, 5))) {
+                                if ($byDaysCounted == array_count_values($this->weeks['MO'])) {
+                                    $weekday = 'day';
+                                } elseif ($byDaysCounted == array_count_values(array_slice($this->weeks['MO'], 0, 5))) {
                                     $weekday = 'weekday';
                                 }
                             }
@@ -1743,7 +1745,7 @@ protected function processRecurrences()
                                     } while ($eventStartTimestamp <= $lastDayTimestamp);
 
                                     // Move forwards
-                                    $recurringTimestamp = strtotime($offset, $recurringTimestamp);
+                                    $recurringTimestamp = strtotime($offset, Carbon::createFromTimestamp($recurringTimestamp)->day(1)->timestamp);
                                 }
                             }
 
@@ -2483,8 +2485,8 @@ protected function convertDayOrdinalToPositive($dayNumber, $weekday, $timestamp)
 
         $dayOrdinals = $this->dayOrdinals;
 
-        if ($dayNumber >= 1) {
-            $dayOrdinal = $dayOrdinals[$dayNumber];
+        if ($dayNumber >= -1) {
+            $dayOrdinal = $dayNumber === -1 ? 'last' : $dayOrdinals[$dayNumber];
 
             if ($weekday === 'weekday') {
                 $dayOrdinal = "-1 day {$dayOrdinal}";