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<?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\Translation;
use Symfony\Component\Translation\Exception\InvalidArgumentException;
/**
* MessageSelector.
*
* @author Fabien Potencier <fabien@symfony.com>
* @author Bernhard Schussek <bschussek@gmail.com>
*/
class MessageSelector
{
/**
* Given a message with different plural translations separated by a
* pipe (|), this method returns the correct portion of the message based
* on the given number, locale and the pluralization rules in the message
* itself.
*
* The message supports two different types of pluralization rules:
*
* interval: {0} There are no apples|{1} There is one apple|]1,Inf] There are %count% apples
* indexed: There is one apple|There are %count% apples
*
* The indexed solution can also contain labels (e.g. one: There is one apple).
* This is purely for making the translations more clear - it does not
* affect the functionality.
*
* The two methods can also be mixed:
* {0} There are no apples|one: There is one apple|more: There are %count% apples
*
* @param string $message The message being translated
* @param int $number The number of items represented for the message
* @param string $locale The locale to use for choosing
*
* @return string
*
* @throws InvalidArgumentException
*/
public function choose($message, $number, $locale)
{
preg_match_all('/(?:\|\||[^\|])++/', $message, $parts);
$explicitRules = array();
$standardRules = array();
foreach ($parts[0] as $part) {
$part = trim(str_replace('||', '|', $part));
if (preg_match('/^(?P<interval>'.Interval::getIntervalRegexp().')\s*(?P<message>.*?)$/xs', $part, $matches)) {
$explicitRules[$matches['interval']] = $matches['message'];
} elseif (preg_match('/^\w+\:\s*(.*?)$/', $part, $matches)) {
$standardRules[] = $matches[1];
} else {
$standardRules[] = $part;
}
}
// try to match an explicit rule, then fallback to the standard ones
foreach ($explicitRules as $interval => $m) {
if (Interval::test($number, $interval)) {
return $m;
}
}
$position = PluralizationRules::get($number, $locale);
if (!isset($standardRules[$position])) {
// when there's exactly one rule given, and that rule is a standard
// rule, use this rule
if (1 === count($parts[0]) && isset($standardRules[0])) {
return $standardRules[0];
}
throw new InvalidArgumentException(sprintf('Unable to choose a translation for "%s" with locale "%s" for value "%d". Double check that this translation has the correct plural options (e.g. "There is one apple|There are %%count%% apples").', $message, $locale, $number));
}
return $standardRules[$position];
}
}