<?php
namespace FluidTYPO3\Vhs\ViewHelpers\Math;

/*
 * This file is part of the FluidTYPO3/Vhs project under GPLv2 or later.
 *
 * For the full copyright and license information, please read the
 * LICENSE.md file that was distributed with this source code.
 */

/**
 * Math: Range
 *
 * Gets the lowest and highest number from an array of numbers.
 * Returns an array of [low, high]. For individual low/high
 * values please use v:math.maximum and v:math.minimum.
 *
 * @author Claus Due <claus@namelesscoder.net>
 * @package Vhs
 * @subpackage ViewHelpers\Math
 */
class RangeViewHelper extends AbstractSingleMathViewHelper {

	/**
	 * @return mixed
	 * @throw Exception
	 */
	public function render() {
		$a = $this->getInlineArgument();
		$aIsIterable = $this->assertIsArrayOrIterator($a);
		if (TRUE === $aIsIterable) {
			$a = $this->arrayFromArrayOrTraversableOrCSV($a);
			sort($a, SORT_NUMERIC);
			if (1 === count($a)) {
				return array(reset($a), reset($a));
			} else {
				return array(array_shift($a), array_pop($a));
			}
		}
		return $a;
	}

}