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MessageSelector.php
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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; /** * MessageSelector. * * @author Fabien Potencier <fabien@symfony.com> * @author Bernhard Schussek <bschussek@gmail.com> * * @api */ 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 integer $number The number of items represented for the message * @param string $locale The locale to use for choosing * * @return string * * @throws \InvalidArgumentException * * @api */ public function choose($message, $number, $locale) { $parts = explode('|', $message); $explicitRules = array(); $standardRules = array(); foreach ($parts as $part) { $part = trim($part); if (preg_match('/^(?P<interval>'.Interval::getIntervalRegexp().')\s*(?P<message>.*?)$/x', $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) && isset($standardRules[0])) { return $standardRules[0]; } throw new \InvalidArgumentException(sprintf('Unable to choose a translation for "%s" with locale "%s". Double check that this translation has the correct plural options (e.g. "There is one apple|There are %%count%% apples").', $message, $locale)); } return $standardRules[$position]; } }