Initial commit

typo3conf/ext/vhs/Classes/ViewHelpers/Extension/AbstractExtensionViewHelper.php

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+<?php
+namespace FluidTYPO3\Vhs\ViewHelpers\Extension;
+
+/*
+ * 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.
+ */
+
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+use TYPO3\CMS\Fluid\Core\ViewHelper\AbstractViewHelper;
+
+/**
+ * Base class: Extension ViewHelpers
+ *
+ * @author Claus Due <claus@namelesscoder.net>
+ * @package Vhs
+ * @subpackage ViewHelpers\Extension
+ */
+abstract class AbstractExtensionViewHelper extends AbstractViewHelper {
+
+	/**
+	 * @return void
+	 */
+	public function initializeArguments() {
+		$this->registerArgument('extensionName', 'string', 'Name, in UpperCamelCase, of the extension to be checked', FALSE, NULL, TRUE);
+	}
+
+	/**
+	 * @return string
+	 */
+	protected function getExtensionKey() {
+		$extensionName = $this->getExtensionName();
+		return GeneralUtility::camelCaseToLowerCaseUnderscored($extensionName);
+	}
+
+	/**
+	 * @throws \RuntimeException
+	 * @return mixed
+	 */
+	protected function getExtensionName() {
+		if (TRUE === isset($this->arguments['extensionName']) && FALSE === empty($this->arguments['extensionName'])) {
+			return $this->arguments['extensionName'];
+		}
+		$request = $this->controllerContext->getRequest();
+		$extensionName = $request->getControllerExtensionName();
+		if (TRUE === empty($extensionName)) {
+			throw new \RuntimeException('Unable to read extension name from ControllerContext and value not manually specified', 1364167519);
+		}
+		return $extensionName;
+	}
+
+}