<?php
namespace My\Extension\ViewHelpers;
 
class ImageInterchangeViewHelper extends \TYPO3\CMS\Fluid\ViewHelpers\ImageViewHelper {
 
	/**
	 * Resizes a given image (if required) and renders the respective img tag
	 *
	 * @see http://typo3.org/documentation/document-library/references/doc_core_tsref/4.2.0/view/1/5/#id4164427
	 * @param string $src a path to a file, a combined FAL identifier or an uid (integer). If $treatIdAsReference is set, the integer is considered the uid of the sys_file_reference record. If you already got a FAL object, consider using the $image parameter instead
	 * @param array $interchangeSettings
	 * @param boolean $treatIdAsReference given src argument is a sys_file_reference record
	 * @param FileInterface|AbstractFileFolder $image a FAL object
	 *
	 * @throws \TYPO3\CMS\Fluid\Core\ViewHelper\Exception
	 * @return string Rendered tag
	 */
	public function render($src = NULL, $interchangeSettings = NULL, $treatIdAsReference = FALSE, $image = NULL) {
		if (is_null($src) && is_null($image) || !is_null($src) && !is_null($image)) {
			throw new \TYPO3\CMS\Fluid\Core\ViewHelper\Exception('You must either specify a string src or a File object.', 1382284106);
		}
		$image = $this->imageService->getImage($src, $image, $treatIdAsReference);
		$interchangeData = array();
		foreach($interchangeSettings as $key => $settings) {
			$processingInstructions = array(
				'width' => $settings['width'],
				'height' => $settings['height'],
				'minWidth' => $settings['minWidth'],
				'minHeight' => $settings['minHeight'],
				'maxWidth' => $settings['maxWidth'],
				'maxHeight' => $settings['maxHeight'],
			);
			$processedImage = $this->imageService->applyProcessingInstructions($image, $processingInstructions);
			$imageUri = $this->imageService->getImageUri($processedImage);
 
			$interchangeData[] = '['.$imageUri.', ('.$key.')]';
		}
 
		$this->tag->addAttribute('data-interchange', implode(',', $interchangeData));
 
		$alt = $image->getProperty('alternative');
		$title = $image->getProperty('title');
 
		if (empty($this->arguments['alt'])) {
			$this->tag->addAttribute('alt', $alt);
		}
		if (empty($this->arguments['title']) && $title) {
			$this->tag->addAttribute('title', $title);
		}
 
		return $this->tag->render();
	}
 
}

<?php
<?php
namespace My\Extension\ViewHelper\Fe;
 
class LinkViewHelper extends \TYPO3\CMS\Fluid\Core\ViewHelper\AbstractTagBasedViewHelper {
 
	/**
	 * @var string
	 */
	protected $tagName = 'a';
 
	/**
	 * Arguments initialization
	 *
	 * @return void
	 */
	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');
	}
 
	/**
	 * @param int $pageUid
	 * @param string $pluginName
	 * @param array $pluginArguments
	 * @return string content
	 */
	public function render($pageUid, $pluginName = NULL, $pluginArguments = NULL) {
		$this->initTSFE();
		$cObj = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance('TYPO3\\CMS\\Frontend\\ContentObject\\ContentObjectRenderer');
 
		$additionalParams = '';
		if(isset($pluginArguments) && is_array($pluginArguments) && isset($pluginName)) {
			foreach($pluginArguments as $key => $value) {
 
				$namespace = \TYPO3\CMS\Core\Utility\GeneralUtility::camelCaseToLowerCaseUnderscored($pluginName);
				if($value instanceof \TYPO3\CMS\Extbase\DomainObject\AbstractDomainObject) {
					if ($value->getUid() !== NULL) {
						$additionalParams.= '&tx_extension_'.$namespace.'['.$key.']='.$value->getUid();
					}
				} else {
					$additionalParams.= '&tx_extension_'.$namespace.'['.$key.']='.$value;
				}
			}
		}
 
		$uri = $cObj->typolink_URL(array('parameter' => $pageUid, 'additionalParams' => $additionalParams, 'forceAbsoluteUrl' => 1));
 
		$this->tag->addAttribute('href', $uri, FALSE);
		$this->tag->setContent($this->renderChildren());
		$this->tag->forceClosingTag(TRUE);
		return $this->tag->render();
	}
 
	protected function initTSFE($id = 1, $typeNum = 0) {
		\TYPO3\CMS\Frontend\Utility\EidUtility::initTCA();
		if (!is_object($GLOBALS['TT'])) {
			$GLOBALS['TT'] = new \TYPO3\CMS\Core\TimeTracker\NullTimeTracker;
			$GLOBALS['TT']->start();
		}
		$GLOBALS['TSFE'] = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance('TYPO3\\CMS\\Frontend\\Controller\\TypoScriptFrontendController',  
			$GLOBALS['TYPO3_CONF_VARS'], $id, $typeNum);
		$GLOBALS['TSFE']->connectToDB();
		$GLOBALS['TSFE']->initFEuser();
		$GLOBALS['TSFE']->determineId();
		$GLOBALS['TSFE']->initTemplate();
		$GLOBALS['TSFE']->getConfigArray();
 
		if (\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::isLoaded('realurl')) {
			$rootline = \TYPO3\CMS\Backend\Utility\BackendUtility::BEgetRootLine($id);
			$host = \TYPO3\CMS\Backend\Utility\BackendUtility::firstDomainRecord($rootline);
			$_SERVER['HTTP_HOST'] = $host;
		}
	}
}
?>

public function render($parameters, $returnUrl = '') {
	$uri = 'alt_doc.php?' . $parameters;
	if (!empty($returnUrl)) {
		$uri .= '&returnUrl=' . rawurlencode($returnUrl);
	} else {
		$returnUrl = 'mod.php?M='.$_GET['M'].'&moduleToken='.$_GET['moduleToken'];
		$uri .= '&returnUrl=' . rawurlencode($returnUrl);
	}
 
	$this->tag->addAttribute('href', $uri);
	$this->tag->setContent($this->renderChildren());
	$this->tag->forceClosingTag(TRUE);
	return $this->tag->render();
}

class SendReminderTask extends \TYPO3\CMS\Scheduler\Task\AbstractTask {
	public function execute() {
		[...]
 
		$this->initFrontend();
 
		foreach($documents as $document) {
			[...]
 
			$cObj = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance('TYPO3\\CMS\\Frontend\\ContentObject\\ContentObjectRenderer');
			$linkConf = array(
				'parameter' => $this->extConf['targetPageUid'],
				'forceAbsoluteUrl' => 1,
				'additionalParams' => \TYPO3\CMS\Core\Utility\GeneralUtility::implodeArrayForUrl(NULL, array(
					'tx_myextension[action]' => 'extend',
					'tx_myextension[document]' => $document->getUid(),
					'tx_myextension[hash]' => $document->getHash(),
				)),
				'linkAccessRestrictedPages' => 1
			);
			$link = $cObj->typolink_URL($linkConf);
 
			[...]
		}
 
		return TRUE;
	}
 
	/*
	 * init frontnend to render frontend links in task
	 */
	protected function initFrontend() {
		$id = 1;
		$type = 0;
		if (!is_object($GLOBALS['TT'])) {
			$GLOBALS['TT'] = new \TYPO3\CMS\Core\TimeTracker\TimeTracker;
			$GLOBALS['TT']->start();
		}
		$GLOBALS['TSFE'] = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance('TYPO3\\CMS\\Frontend\\Controller\\TypoScriptFrontendController',  $GLOBALS['TYPO3_CONF_VARS'], $id, $typeNum);
		$GLOBALS['TSFE']->connectToDB();
		$GLOBALS['TSFE']->initFEuser();
		$GLOBALS['TSFE']->determineId();
		$GLOBALS['TSFE']->initTemplate();
		$GLOBALS['TSFE']->getConfigArray();
 
		if (\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::isLoaded('realurl')) {
			$rootline = \TYPO3\CMS\Backend\Utility\BackendUtility::BEgetRootLine($id);
			$host = \TYPO3\CMS\Backend\Utility\BackendUtility::firstDomainRecord($rootline);
			$_SERVER['HTTP_HOST'] = $host;
		}
	}
}

[...]
'file' => array(
	'exclude' => 1,
	'label' => 'LLL:EXT:nocdocuments/Resources/Private/Language/locallang_db.xlf:tx_nocdocuments_domain_model_document.file',
	'config' => \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::getFileFieldTCAConfig(
		'file',
		array('maxitems' => 1),
		'*'
	),
),
[...]