4 * This file is part of the Symfony package.
6 * (c) Fabien Potencier <fabien@symfony.com>
8 * For the full copyright and license information, please view the LICENSE
9 * file that was distributed with this source code.
12 namespace Symfony\Component\Translation;
17 * @author Fabien Potencier <fabien@symfony.com>
18 * @author Bernhard Schussek <bschussek@gmail.com>
23 * Given a message with different plural translations separated by a
24 * pipe (|), this method returns the correct portion of the message based
25 * on the given number, locale and the pluralization rules in the message
28 * The message supports two different types of pluralization rules:
30 * interval: {0} There are no apples|{1} There is one apple|]1,Inf] There are %count% apples
31 * indexed: There is one apple|There are %count% apples
33 * The indexed solution can also contain labels (e.g. one: There is one apple).
34 * This is purely for making the translations more clear - it does not
35 * affect the functionality.
37 * The two methods can also be mixed:
38 * {0} There are no apples|one: There is one apple|more: There are %count% apples
40 * @param string $message The message being translated
41 * @param int $number The number of items represented for the message
42 * @param string $locale The locale to use for choosing
46 * @throws \InvalidArgumentException
48 public function choose($message, $number, $locale)
50 $parts = explode('|', $message);
51 $explicitRules = array();
52 $standardRules = array();
53 foreach ($parts as $part) {
56 if (preg_match('/^(?P<interval>'.Interval::getIntervalRegexp().')\s*(?P<message>.*?)$/xs', $part, $matches)) {
57 $explicitRules[$matches['interval']] = $matches['message'];
58 } elseif (preg_match('/^\w+\:\s*(.*?)$/', $part, $matches)) {
59 $standardRules[] = $matches[1];
61 $standardRules[] = $part;
65 // try to match an explicit rule, then fallback to the standard ones
66 foreach ($explicitRules as $interval => $m) {
67 if (Interval::test($number, $interval)) {
72 $position = PluralizationRules::get($number, $locale);
74 if (!isset($standardRules[$position])) {
75 // when there's exactly one rule given, and that rule is a standard
76 // rule, use this rule
77 if (1 === count($parts) && isset($standardRules[0])) {
78 return $standardRules[0];
81 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));
84 return $standardRules[$position];