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<?php namespace Fisharebest\Localization\PluralRule;

/**
 * Class PluralRule4 - Select a plural form for a specified number.
 *
 * Families:
 * Celtic (Scottish Gaelic)
 *
 * nplurals=4; plural=(n==1 || n==11) ? 0 : (n==2 || n==12) ? 1 : (n > 2 && n < 20) ? 2 : 3;
 *
 * @author    Greg Roach <fisharebest@gmail.com>
 * @copyright (c) 2015 Greg Roach
 * @license   GPLv3+
 */
class PluralRule4 implements PluralRuleInterface {
	/** {@inheritdoc} */
	public function plurals() {
		return 4;
	}

	/** {@inheritdoc} */
	public function plural($number) {
		$number = abs($number);

		if ($number === 1 || $number === 11) {
			return 0;
		} elseif ($number === 2 || $number === 12) {
			return 1;
		} elseif ($number > 2 && $number < 20) {
			return 2;
		} else {
			return 3;
		}
	}
}