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feature #31295 [Intl] Add timezone offset utilities (ro0NL)

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This PR was merged into the 4.3-dev branch.

Discussion
----------

[Intl] Add timezone offset utilities

| Q             | A
| ------------- | ---
| Branch?       | master
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no     <!-- see https://symfony.com/bc -->
| Deprecations? | no
| Tests pass?   | yes (including intl-data group)
| Fixed tickets | #...   <!-- #-prefixed issue number(s), if any -->
| License       | MIT
| Doc PR        | symfony/symfony-docs#... <!-- required for new features -->

Commits
-------

b166e33e29 [Intl] Add timezone offset utilities
This commit is contained in:
Fabien Potencier 2019-04-29 08:33:14 +02:00
commit ac4b32257c
2 changed files with 38 additions and 0 deletions
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14
src/Symfony/Component/Intl/Tests/TimezonesTest.php
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@ -529,4 +529,18 @@ class TimezonesTest extends ResourceBundleTestCase
$this->assertTrue(Timezones::exists('Europe/Amsterdam'));
$this->assertFalse(Timezones::exists('Etc/Unknown'));
}
public function testGetRawOffset()
{
$this->assertSame(0, Timezones::getRawOffset('Etc/UTC'));
$this->assertSame(-10800, Timezones::getRawOffset('America/Buenos_Aires'));
$this->assertSame(20700, Timezones::getRawOffset('Asia/Katmandu'));
}
public function testGetGmtOffset()
{
$this->assertSame('GMT+00:00', Timezones::getGmtOffset('Etc/UTC'));
$this->assertSame('GMT-03:00', Timezones::getGmtOffset('America/Buenos_Aires'));
$this->assertSame('GMT+05:45', Timezones::getGmtOffset('Asia/Katmandu'));
}
}

24
src/Symfony/Component/Intl/Timezones.php
View File

@ -12,6 +12,7 @@
namespace Symfony\Component\Intl;
use Symfony\Component\Intl\Exception\MissingResourceException;
use Symfony\Component\Intl\Exception\RuntimeException;
/**
* Gives access to timezone-related ICU data.
@ -52,6 +53,29 @@ final class Timezones extends ResourceBundle
return self::asort(self::readEntry(['Names'], $displayLocale), $displayLocale);
}
public static function getRawOffset(string $timezone, int $timestamp = null): int
{
if (null === $timestamp) {
$timestamp = time();
}
$transitions = (new \DateTimeZone($timezone))->getTransitions($timestamp, $timestamp);
if (!isset($transitions[0]['offset'])) {
throw new RuntimeException('No timezone transitions available.');
}
return $transitions[0]['offset'];
}
public static function getGmtOffset(string $timezone, int $timestamp = null): string
{
$offset = self::getRawOffset($timezone, $timestamp);
$abs = abs($offset);
return sprintf('GMT%s%02d:%02d', 0 <= $offset ? '+' : '-', $abs / 3600, $abs / 60 % 60);
}
protected static function getPath(): string
{
return Intl::getDataDirectory().'/'.Intl::TIMEZONE_DIR;