public function MessageSelector::choose in Plug 7

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

@api

Parameters

string $message The message being translated:

int $number The number of items represented for the message:

string $locale The locale to use for choosing:

Return value

string

Throws

\InvalidArgumentException

File

lib/Symfony/translation/MessageSelector.php, line 52

Class

MessageSelector

MessageSelector.

Namespace

Symfony\Component\Translation

Code

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>.*?)$/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];
}