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<?php
/*
* This file belongs to the package "TYPO3 Fluid".
* See LICENSE.txt that was shipped with this package.
*/
namespace TYPO3Fluid\Fluid\ViewHelpers;
use TYPO3Fluid\Fluid\Core\Rendering\RenderingContextInterface;
use TYPO3Fluid\Fluid\Core\ViewHelper\AbstractViewHelper;
use TYPO3Fluid\Fluid\Core\ViewHelper\Traits\CompileWithContentArgumentAndRenderStatic;
/**
* Or ViewHelper
*
* If content is null use alternative text.
*
* Usage of f:or
* =============
*
* ::
*
* {f:variable(name:'fallback',value:'this is not the variable you\'re looking for')}
* {undefinedVariable -> f:or(alternative:fallback)}
*
* Usage of ternary operator
* =========================
*
* In some cases (e.g. when you want to check for empty instead of null)
* it might be more handy to use a ternary operator instead of f:or
*
* ::
*
* {emptyVariable ?: 'this is an alterative text'}
*/
class OrViewHelper extends AbstractViewHelper
{
use CompileWithContentArgumentAndRenderStatic;
/**
* Initialize
*/
public function initializeArguments()
{
$this->registerArgument('content', 'mixed', 'Content to check if null');
$this->registerArgument('alternative', 'mixed', 'Alternative if content is null');
$this->registerArgument('arguments', 'array', 'Arguments to be replaced in the resulting string, using sprintf');
}
/**
* @param array $arguments
* @param \Closure $renderChildrenClosure
* @param RenderingContextInterface $renderingContext
* @return mixed
*/
public static function renderStatic(array $arguments, \Closure $renderChildrenClosure, RenderingContextInterface $renderingContext)
{
$alternative = $arguments['alternative'];
$arguments = (array)$arguments['arguments'];
if (empty($arguments)) {
$arguments = null;
}
$content = $renderChildrenClosure();
if (null === $content) {
$content = $alternative;
}
if (false === empty($content)) {
$content = null !== $arguments ? vsprintf($content, $arguments) : $content;
}
return $content;
}
}