From 4f5b44bd3bd490309eb2ba7b44df4769816ba729 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nicolas=20L=C5=93uillet?= <nicolas.loeuillet@gmail.com>
Date: Sat, 3 Aug 2013 19:26:54 +0200
Subject: twig implementation

---
 .../DateFormat/TimeZoneTransformer.php             | 99 ++++++++++++++++++++++
 1 file changed, 99 insertions(+)
 create mode 100644 vendor/symfony/intl/Symfony/Component/Intl/DateFormatter/DateFormat/TimeZoneTransformer.php

(limited to 'vendor/symfony/intl/Symfony/Component/Intl/DateFormatter/DateFormat/TimeZoneTransformer.php')

diff --git a/vendor/symfony/intl/Symfony/Component/Intl/DateFormatter/DateFormat/TimeZoneTransformer.php b/vendor/symfony/intl/Symfony/Component/Intl/DateFormatter/DateFormat/TimeZoneTransformer.php
new file mode 100644
index 00000000..7d74bd36
--- /dev/null
+++ b/vendor/symfony/intl/Symfony/Component/Intl/DateFormatter/DateFormat/TimeZoneTransformer.php
@@ -0,0 +1,99 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Intl\DateFormatter\DateFormat;
+
+use Symfony\Component\Intl\Exception\NotImplementedException;
+
+/**
+ * Parser and formatter for time zone format
+ *
+ * @author Igor Wiedler <igor@wiedler.ch>
+ */
+class TimeZoneTransformer extends Transformer
+{
+    /**
+     * {@inheritDoc}
+     *
+     * @throws NotImplementedException  When time zone is different than UTC or GMT (Etc/GMT)
+     */
+    public function format(\DateTime $dateTime, $length)
+    {
+        $timeZone = substr($dateTime->getTimezone()->getName(), 0, 3);
+
+        if (!in_array($timeZone, array('Etc', 'UTC'))) {
+            throw new NotImplementedException('Time zone different than GMT or UTC is not supported as a formatting output.');
+        }
+
+        // From ICU >= 4.8, the zero offset is not more used, example: GMT instead of GMT+00:00
+        $format = (0 !== (int) $dateTime->format('O')) ? '\G\M\TP' : '\G\M\T';
+
+        return $dateTime->format($format);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function getReverseMatchingRegExp($length)
+    {
+        return 'GMT[+-]\d{2}:?\d{2}';
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function extractDateOptions($matched, $length)
+    {
+        return array(
+            'timezone' => self::getEtcTimeZoneId($matched)
+        );
+    }
+
+    /**
+     * Get an Etc/GMT timezone identifier for the specified timezone
+     *
+     * The PHP documentation for timezones states to not use the 'Other' time zones because them exists
+     * "for backwards compatibility". However all Etc/GMT time zones are in the tz database 'etcetera' file,
+     * which indicates they are not deprecated (neither are old names).
+     *
+     * Only GMT, Etc/Universal, Etc/Zulu, Etc/Greenwich, Etc/GMT-0, Etc/GMT+0 and Etc/GMT0 are old names and
+     * are linked to Etc/GMT or Etc/UTC.
+     *
+     * @param string $formattedTimeZone A GMT timezone string (GMT-03:00, e.g.)
+     *
+     * @return string                     A timezone identifier
+     *
+     * @see    http://php.net/manual/en/timezones.others.php
+     * @see    http://www.twinsun.com/tz/tz-link.htm
+     *
+     * @throws NotImplementedException   When the GMT time zone have minutes offset different than zero
+     * @throws \InvalidArgumentException  When the value can not be matched with pattern
+     */
+    public static function getEtcTimeZoneId($formattedTimeZone)
+    {
+        if (preg_match('/GMT(?P<signal>[+-])(?P<hours>\d{2}):?(?P<minutes>\d{2})/', $formattedTimeZone, $matches)) {
+            $hours   = (int) $matches['hours'];
+            $minutes = (int) $matches['minutes'];
+            $signal  = $matches['signal'] == '-' ? '+' : '-';
+
+            if (0 < $minutes) {
+                throw new NotImplementedException(sprintf(
+                    'It is not possible to use a GMT time zone with minutes offset different than zero (0). GMT time zone tried: %s.',
+                    $formattedTimeZone
+                ));
+            }
+
+            return 'Etc/GMT'.($hours !== 0 ? $signal.$hours : '');
+        }
+
+        throw new \InvalidArgumentException('The GMT time zone \'%s\' does not match with the supported formats GMT[+-]HH:MM or GMT[+-]HHMM.');
+    }
+}
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