LinkViewHelper.php

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<?php
namespace TYPO3\CMS\Fluid\ViewHelpers\Widget;

/*                                                                        *
 * This script is backported from the TYPO3 Flow package "TYPO3.Fluid".   *
 *                                                                        *
 * It is free software; you can redistribute it and/or modify it under    *
 * the terms of the GNU Lesser General Public License, either version 3   *
 *  of the License, or (at your option) any later version.                *
 *                                                                        *
 *                                                                        *
 * This script is distributed in the hope that it will be useful, but     *
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHAN-    *
 * TABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser       *
 * General Public License for more details.                               *
 *                                                                        *
 * You should have received a copy of the GNU Lesser General Public       *
 * License along with the script.                                         *
 * If not, see http://www.gnu.org/licenses/lgpl.html                      *
 *                                                                        *
 * The TYPO3 project - inspiring people to share!                         *
 *                                                                        */
class LinkViewHelper extends \TYPO3\CMS\Fluid\Core\ViewHelper\AbstractTagBasedViewHelper
{
    protected $tagName = 'a';

    public function initializeArguments()
    {
        $this->registerUniversalTagAttributes();
        $this->registerTagAttribute('name', 'string', 'Specifies the name of an anchor');
        $this->registerTagAttribute('rel', 'string', 'Specifies the relationship between the current document and the linked document');
        $this->registerTagAttribute('rev', 'string', 'Specifies the relationship between the linked document and the current document');
        $this->registerTagAttribute('target', 'string', 'Specifies where to open the linked document');
        $this->registerArgument('addQueryStringMethod', 'string', 'Method to be used for query string');
    }

    public function render($action = null, $arguments = [], $section = '', $format = '', $ajax = false)
    {
        if ($ajax === true) {
            $uri = $this->getAjaxUri();
        } else {
            $uri = $this->getWidgetUri();
        }
        $this->tag->addAttribute('href', $uri);
        $this->tag->setContent($this->renderChildren());
        return $this->tag->render();
    }

    protected function getAjaxUri()
    {
        $action = $this->arguments['action'];
        $arguments = $this->arguments['arguments'];
        if ($action === null) {
            $action = $this->controllerContext->getRequest()->getControllerActionName();
        }
        $arguments['id'] = $GLOBALS['TSFE']->id;
        // @todo page type should be configurable
        $arguments['type'] = 7076;
        $arguments['fluid-widget-id'] = $this->controllerContext->getRequest()->getWidgetContext()->getAjaxWidgetIdentifier();
        $arguments['action'] = $action;
        return '?' . http_build_query($arguments, null, '&');
    }

    protected function getWidgetUri()
    {
        $uriBuilder = $this->controllerContext->getUriBuilder();
        $argumentPrefix = $this->controllerContext->getRequest()->getArgumentPrefix();
        $arguments = $this->hasArgument('arguments') ? $this->arguments['arguments'] : [];
        if ($this->hasArgument('action')) {
            $arguments['action'] = $this->arguments['action'];
        }
        if ($this->hasArgument('format') && $this->arguments['format'] !== '') {
            $arguments['format'] = $this->arguments['format'];
        }
        return $uriBuilder->reset()
            ->setArguments([$argumentPrefix => $arguments])
            ->setSection($this->arguments['section'])
            ->setAddQueryString(true)
            ->setAddQueryStringMethod($this->arguments['addQueryStringMethod'])
            ->setArgumentsToBeExcludedFromQueryString([$argumentPrefix, 'cHash'])
            ->setFormat($this->arguments['format'])
            ->build();
    }
}