[TYPO3 6.2.x] Return typolink to tx_news entry or pageId set by DCE content

DCE configuration of field.link

<config>
	<type>group</type>
	<internal_type>db</internal_type>
	<allowed>pages,tx_news_domain_model_news</allowed>
	<size>1</size>
	<minitems>1</minitems>
	<maxitems>1</maxitems>
	<show_thumbs>0</show_thumbs>
</config>

DCE template

{namespace dce=ArminVieweg\Dce\ViewHelpers}
{namespace m=Tx_PmRendercontent_ViewHelpers}
<f:layout name="Default" />

<f:section name="main">
	<a href="<m:Newslink uid="{field.link}" />">Link</a>
</f:section>

NewslinkViewHelper.php

<?php
	/**
	 * ViewHelper zur Rückgabe eines Links
	 */
	class Tx_PmRendercontent_ViewHelpers_NewslinkViewHelper extends \TYPO3\CMS\Fluid\Core\ViewHelper\AbstractViewHelper {
		/**
		 * @var \TYPO3\CMS\Extbase\Configuration\ConfigurationManagerInterface
		 */
		protected $configurationManager;

		/**
		 * @var Content Object
		 */
		protected $cObj;

		/**
		 * Parse content element
		 *
		 * @param    int           UID des Links
		 * @param    string        Titel des Links
		 * @return   string        Link
		 */
		public function render($uid, $title = "") {
			if (strpos($uid, "tx_news_domain_model_news") !== false) {
				$uidInt = explode("_", $uid);
				$uidInt = end($uidInt);

				$res = $GLOBALS['TYPO3_DB']->exec_SELECT_mm_query('sys_category.single_pid', 'sys_category', 'sys_category_record_mm', 'tx_news_domain_model_news', 'AND tx_news_domain_model_news.uid = ' . intval($uidInt));

				while ($row = $GLOBALS['TYPO3_DB']->sql_fetch_assoc($res)) {
				    $pageId = $row["single_pid"];
				}

				$linkConf = array(
					'parameter' => $pageId,
					'returnLast' => 'url',
					'additionalParams' => "&tx_news_pi1[news]=" . intval($uidInt)
				);

				return $GLOBALS['TSFE']->cObj->typoLink($title, $linkConf);
			} else {
				$uidInt = explode("_", $uid);
				$uidInt = end($uidInt);

				$linkConf = array(
					'parameter' => intval($uidInt),
					'returnLast' => 'url'
				);

				return $GLOBALS['TSFE']->cObj->typoLink($title, $linkConf);
			}
		}

		/**
		 * Injects Configuration Manager
		 *
		 * @param \TYPO3\CMS\Extbase\Configuration\ConfigurationManagerInterface
		 * $configurationManager
		 * @return void
		 */
		public function injectConfigurationManager(\TYPO3\CMS\Extbase\Configuration\ConfigurationManagerInterface $configurationManager) {
			$this->configurationManager = $configurationManager;
			$this->cObj = $this->configurationManager->getContentObject();
		}

	}
?>