twig implementation

vendor/symfony/translation/Symfony/Component/Translation/MessageSelector.php

@@ -0,0 +1,82 @@
+<?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>
+ *
+ * @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])) {
+            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];
+    }
+}