84 lines
2.2 KiB
PHP
84 lines
2.2 KiB
PHP
<?php
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namespace FluidTYPO3\Vhs\ViewHelpers\Math;
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/*
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* This file is part of the FluidTYPO3/Vhs project under GPLv2 or later.
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*
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* For the full copyright and license information, please read the
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* LICENSE.md file that was distributed with this source code.
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*/
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use FluidTYPO3\Vhs\Traits\ArrayConsumingViewHelperTrait;
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use TYPO3\CMS\Fluid\Core\ViewHelper\AbstractViewHelper;
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use TYPO3\CMS\Fluid\Core\ViewHelper\Exception;
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/**
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* Base class: Math ViewHelpers operating on one number or an
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* array of numbers.
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*
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* @author Claus Due <claus@namelesscoder.net>
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* @package Vhs
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* @subpackage ViewHelpers
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*/
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abstract class AbstractSingleMathViewHelper extends AbstractViewHelper {
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use ArrayConsumingViewHelperTrait;
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/**
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* @return void
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*/
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public function initializeArguments() {
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$this->registerArgument('a', 'mixed', 'First number for calculation', FALSE, NULL, TRUE);
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$this->registerArgument('fail', 'boolean', 'If TRUE, throws an Exception if argument "a" is not specified and no child content or inline argument is found. Usually okay to use a NULL value (as integer zero).', FALSE, FALSE);
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}
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/**
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* @param mixed $subject
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* @return boolean
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*/
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protected function assertIsArrayOrIterator($subject) {
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return (boolean) (TRUE === is_array($subject) || TRUE === $subject instanceof \Iterator);
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}
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/**
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* @return mixed
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* @throw Exception
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*/
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public function render() {
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$a = $this->getInlineArgument();
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return $this->calculate($a);
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}
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/**
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* @throws Exception
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* @return mixed
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*/
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protected function getInlineArgument() {
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$a = $this->renderChildren();
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if (NULL === $a && TRUE === isset($this->arguments['a'])) {
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$a = $this->arguments['a'];
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}
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if (NULL === $a && TRUE === (boolean) $this->arguments['fail']) {
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throw new Exception('Required argument "a" was not supplied', 1237823699);
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}
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return $a;
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}
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/**
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* @param mixed $a
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* @return mixed
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*/
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protected function calculate($a) {
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$aIsIterable = $this->assertIsArrayOrIterator($a);
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if (TRUE === $aIsIterable) {
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$a = $this->arrayFromArrayOrTraversableOrCSV($a);
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foreach ($a as $index => $value) {
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$a[$index] = $this->calculateAction($value);
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}
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return $a;
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}
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return $this->calculateAction($a);
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}
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}
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