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