From b1f3c3bee814ee9fadd4145ade9d9542211d2ee4 Mon Sep 17 00:00:00 2001
From: Aleksander Machniak <alec@alec.pl>
Date: Mon, 28 Oct 2013 15:28:58 +0100
Subject: Fixed saving contact birthday/anniversary dates before 01-01-1970

---
 program/lib/Roundcube/rcube_utils.php | 79 ++++++++++++++++++++++-------------
 1 file changed, 49 insertions(+), 30 deletions(-)

(limited to 'program/lib/Roundcube/rcube_utils.php')

diff --git a/program/lib/Roundcube/rcube_utils.php b/program/lib/Roundcube/rcube_utils.php
index 174fe398c..27a618d83 100644
--- a/program/lib/Roundcube/rcube_utils.php
+++ b/program/lib/Roundcube/rcube_utils.php
@@ -747,40 +747,13 @@ class rcube_utils
      */
     public static function strtotime($date)
     {
-        $date = trim($date);
-
-        // check for MS Outlook vCard date format YYYYMMDD
-        if (preg_match('/^([12][90]\d\d)([01]\d)([0123]\d)$/', $date, $m)) {
-            return mktime(0,0,0, intval($m[2]), intval($m[3]), intval($m[1]));
-        }
-
-        // common little-endian formats, e.g. dd/mm/yyyy (not all are supported by strtotime)
-        if (preg_match('/^(\d{1,2})[.\/-](\d{1,2})[.\/-](\d{4})$/', $date, $m)
-            && $m[1] > 0 && $m[1] <= 31 && $m[2] > 0 && $m[2] <= 12 && $m[3] >= 1970
-        ) {
-            return mktime(0,0,0, intval($m[2]), intval($m[1]), intval($m[3]));
-        }
+        $date = self::clean_datestr($date);
 
         // unix timestamp
         if (is_numeric($date)) {
             return (int) $date;
         }
 
-        // Clean malformed data
-        $date = preg_replace(
-            array(
-                '/GMT\s*([+-][0-9]+)/',                     // support non-standard "GMTXXXX" literal
-                '/[^a-z0-9\x20\x09:+-]/i',                  // remove any invalid characters
-                '/\s*(Mon|Tue|Wed|Thu|Fri|Sat|Sun)\s*/i',   // remove weekday names
-            ),
-            array(
-                '\\1',
-                '',
-                '',
-            ), $date);
-
-        $date = trim($date);
-
         // if date parsing fails, we have a date in non-rfc format.
         // remove token from the end and try again
         while ((($ts = @strtotime($date)) === false) || ($ts < 0)) {
@@ -808,8 +781,8 @@ class rcube_utils
             return $date;
         }
 
-        $dt = false;
-        $date = trim($date);
+        $dt   = false;
+        $date = self::clean_datestr($date);
 
         // try to parse string with DateTime first
         if (!empty($date)) {
@@ -834,6 +807,52 @@ class rcube_utils
         return $dt;
     }
 
+    /**
+     * Clean up date string for strtotime() input
+     *
+     * @param string $date Date string
+     *
+     * @return string Date string
+     */
+    public static function clean_datestr($date)
+    {
+        $date = trim($date);
+
+        // check for MS Outlook vCard date format YYYYMMDD
+        if (preg_match('/^([12][90]\d\d)([01]\d)([0123]\d)$/', $date, $m)) {
+            return sprintf('%04d-%02d-%02d 00:00:00', intval($m[1]), intval($m[2]), intval($m[3]));
+        }
+
+        // Clean malformed data
+        $date = preg_replace(
+            array(
+                '/GMT\s*([+-][0-9]+)/',                     // support non-standard "GMTXXXX" literal
+                '/[^a-z0-9\x20\x09:+-\/]/i',                  // remove any invalid characters
+                '/\s*(Mon|Tue|Wed|Thu|Fri|Sat|Sun)\s*/i',   // remove weekday names
+            ),
+            array(
+                '\\1',
+                '',
+                '',
+            ), $date);
+
+        $date = trim($date);
+
+        // try to fix dd/mm vs. mm/dd discrepancy, we can't do more here
+        if (preg_match('/^(\d{1,2})[.\/-](\d{1,2})[.\/-](\d{4})$/', $date, $m)) {
+            $mdy   = $m[2] > 12 && $m[1] <= 12;
+            $day   = $mdy ? $m[2] : $m[1];
+            $month = $mdy ? $m[1] : $m[2];
+            $date  = sprintf('%04d-%02d-%02d 00:00:00', intval($m[3]), $month, $day);
+        }
+        // I've found that YYYY.MM.DD is recognized wrong, so here's a fix
+        else if (preg_match('/^(\d{4})\.(\d{1,2})\.(\d{1,2})$/', $date)) {
+            $date = str_replace('.', '-', $date) . ' 00:00:00';
+        }
+
+        return $date;
+    }
+
     /*
      * Idn_to_ascii wrapper.
      * Intl/Idn modules version of this function doesn't work with e-mail address
-- 
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