IcuMessageSelector.php

<?php

namespace App\Translator;

use MessageFormatter;
use Symfony\Component\Translation\MessageSelector;

class IcuMessageSelector extends MessageSelector
{
    /**
     * @var MessageSelector
     */
    private $selector;

    public function __construct(MessageSelector $selector = null)
    {
        $this->selector = $selector ?: new MessageSelector();
    }

    public function choose($message, $number, $locale)
    {
        if (\preg_match_all('~\{([a-zA-Z_\-\.]+), plural, .*\}~', $message, $matches) === false) {
            return $this->selector->choose($message, $number, $locale);
        }

        $variable = \str_replace('.', '_', $matches[1][0]);
        $message = \strtr($message, [$matches[1][0] => $variable]);

        return (new MessageFormatter($locale, $message))->format([$variable => $number]);
    }
}