<?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;
 
 @trigger_error(sprintf('The "%s" class is deprecated since Symfony 4.2, use IdentityTranslator instead.', MessageSelector::class), E_USER_DEPRECATED);
 
 use Symfony\Component\Translation\Exception\InvalidArgumentException;
 
 /**
  * MessageSelector.
  *
  * @author Fabien Potencier <fabien@symfony.com>
  * @author Bernhard Schussek <bschussek@gmail.com>
  *
  * @deprecated since Symfony 4.2, use IdentityTranslator instead.
  */
 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|float $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)
     {
         $parts = [];
         if (preg_match('/^\|++$/', $message)) {
             $parts = explode('|', $message);
         } elseif (preg_match_all('/(?:\|\||[^\|])++/', $message, $matches)) {
             $parts = $matches[0];
         }
 
         $explicitRules = [];
         $standardRules = [];
         foreach ($parts 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($parts) && isset($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];
     }
 }