TypolinkViewHelper.php

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<?php
 
/*
 * This file is part of the TYPO3 CMS project.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 *
 * The TYPO3 project - inspiring people to share!
 */
 
namespace ‪TYPO3\CMS\Fluid\ViewHelpers\Link;
 
use ‪TYPO3\CMS\Core\Utility\GeneralUtility;
use TYPO3\CMS\Frontend\ContentObject\ContentObjectRenderer;
use TYPO3\CMS\Frontend\Service\TypoLinkCodecService;
use TYPO3Fluid\Fluid\Core\Rendering\RenderingContextInterface;
use TYPO3Fluid\Fluid\Core\ViewHelper\AbstractViewHelper;
use TYPO3Fluid\Fluid\Core\ViewHelper\Exception;
use TYPO3Fluid\Fluid\Core\ViewHelper\Traits\CompileWithRenderStatic;
 
class ‪TypolinkViewHelper extends AbstractViewHelper
{
    use CompileWithRenderStatic;
 
    protected ‪$escapeOutput = false;
 
    public function ‪initializeArguments()
    {
        $this->registerArgument('parameter', 'string', 'stdWrap.typolink style parameter string', true);
        $this->registerArgument('target', 'string', 'Define where to display the linked URL', false, '');
        $this->registerArgument('class', 'string', 'Define classes for the link element', false, '');
        $this->registerArgument('title', 'string', 'Define the title for the link element', false, '');
        $this->registerArgument('language', 'string', 'link to a specific language - defaults to the current language, use a language ID or "current" to enforce a specific language', false, null);
        $this->registerArgument('additionalParams', 'string', 'Additional query parameters to be attached to the resulting URL', false, '');
        $this->registerArgument('additionalAttributes', 'array', 'Additional tag attributes to be added directly to the resulting HTML tag', false, []);
        $this->registerArgument('addQueryString', 'bool', 'If set, the current query parameters will be kept in the URL', false, false);
        $this->registerArgument('addQueryStringMethod', 'string', 'This argument is not evaluated anymore and will be removed in TYPO3 v12.');
        $this->registerArgument('addQueryStringExclude', 'string', 'Define parameters to be excluded from the query string (only active if addQueryString is set)', false, '');
        $this->registerArgument('absolute', 'bool', 'Ensure the resulting URL is an absolute URL', false, false);
        $this->registerArgument('parts-as', 'string', 'Variable name containing typoLink parts (if any)', false, 'typoLinkParts');
        $this->registerArgument('textWrap', 'string', 'Wrap the link using the typoscript "wrap" data type', false, '');
    }
 
    public static function ‪renderStatic(array $arguments, \Closure $renderChildrenClosure, RenderingContextInterface $renderingContext)
    {
        $parameter = $arguments['parameter'] ?? '';
        $partsAs = $arguments['parts-as'] ?? 'typoLinkParts';
 
        $typoLinkCodec = GeneralUtility::makeInstance(TypoLinkCodecService::class);
        $typoLinkConfiguration = $typoLinkCodec->decode($parameter);
        // Merge the $parameter with other arguments
        $mergedTypoLinkConfiguration = static::mergeTypoLinkConfiguration($typoLinkConfiguration, $arguments);
        $typoLinkParameter = $typoLinkCodec->encode($mergedTypoLinkConfiguration);
 
        // expose internal typoLink configuration to Fluid child context
        $variableProvider = $renderingContext->getVariableProvider();
        $variableProvider->add($partsAs, $typoLinkConfiguration);
        // If no link has to be rendered, the inner content will be returned as such
        $content = (string)$renderChildrenClosure();
        // clean up exposed variables
        $variableProvider->remove($partsAs);
 
        if ($parameter) {
            $content = static::invokeContentObjectRenderer($arguments, $typoLinkParameter, $content);
        }
        return $content;
    }
 
    protected static function ‪invokeContentObjectRenderer(array $arguments, string $typoLinkParameter, string $content): string
    {
        if (isset($arguments['addQueryStringMethod'])) {
            trigger_error('Using the argument "addQueryStringMethod" in <f:link.typolink> ViewHelper has no effect anymore and will be removed in TYPO3 v12. Remove the argument in your fluid template, as it will result in a fatal error.', E_USER_DEPRECATED);
        }
        $addQueryString = $arguments['addQueryString'] ?? false;
        $addQueryStringExclude = $arguments['addQueryStringExclude'] ?? '';
        $absolute = $arguments['absolute'] ?? false;
        $aTagParams = static::serializeTagParameters($arguments);
 
        $instructions = [
            'parameter' => $typoLinkParameter,
            'ATagParams' => $aTagParams,
            'forceAbsoluteUrl' => $absolute,
        ];
        if (isset($arguments['language']) && $arguments['language'] !== null) {
            $instructions['language'] = $arguments['language'];
        }
        if ($addQueryString) {
            $instructions['addQueryString'] = $addQueryString;
            $instructions['addQueryString.'] = [
                'exclude' => $addQueryStringExclude,
            ];
        }
        if ((string)($arguments['textWrap'] ?? '') !== '') {
            $instructions['ATagBeforeWrap'] = true;
            $instructions['wrap'] = $arguments['textWrap'];
        }
 
        $contentObject = GeneralUtility::makeInstance(ContentObjectRenderer::class);
        return $contentObject->stdWrap($content, ['typolink.' => $instructions]);
    }
 
    protected static function ‪serializeTagParameters(array $arguments): string
    {
        // array(param1 -> value1, param2 -> value2) --> param1="value1" param2="value2" for typolink.ATagParams
        $extraAttributes = [];
        $additionalAttributes = $arguments['additionalAttributes'] ?? [];
        foreach ($additionalAttributes as $attributeName => $attributeValue) {
            $extraAttributes[] = $attributeName . '="' . htmlspecialchars((string)$attributeValue) . '"';
        }
        return implode(' ', $extraAttributes);
    }
 
    protected static function ‪mergeTypoLinkConfiguration(array $typoLinkConfiguration, array $arguments): array
    {
        if ($typoLinkConfiguration === []) {
            return $typoLinkConfiguration;
        }
 
        $target = $arguments['target'] ?? '';
        $class = $arguments['class'] ?? '';
        $title = $arguments['title'] ?? '';
        $additionalParams = $arguments['additionalParams'] ?? '';
 
        // Override target if given in target argument
        if ($target) {
            $typoLinkConfiguration['target'] = $target;
        }
        // Combine classes if given in both "parameter" string and "class" argument
        if ($class) {
            $classes = explode(' ', trim($typoLinkConfiguration['class']) . ' ' . trim($class));
            $typoLinkConfiguration['class'] = implode(' ', array_unique(array_filter($classes)));
        }
        // Override title if given in title argument
        if ($title) {
            $typoLinkConfiguration['title'] = $title;
        }
        // Combine additionalParams
        if ($additionalParams) {
            $typoLinkConfiguration['additionalParams'] .= $additionalParams;
        }
 
        return $typoLinkConfiguration;
    }
}