[BUGFIX] Disable fe_group check in UserGroupDetector

A hook is added for the checkEnableFields() method in the
TypoScriptFrontendController that overrides the fe_group field
with an empty value. This allows the UserGroupDetector to detect
content groups within subpages of access protected pages where
extendToSubpages is enabled.

Resolves: #61955
Change-Id: I04f232f99200786fe06f7c4923259fb60bba5bb9

Author: astehlik

Classes/IndexQueue/FrontendHelper/UserGroupDetector.php

@@ -74,13 +74,26 @@ public function activate() {
 		$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['tslib/class.tslib_fe.php']['isOutputting'][__CLASS__]        = '&Tx_Solr_IndexQueue_FrontendHelper_UserGroupDetector->disableFrontendOutput';
 		$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['tslib/class.tslib_fe.php']['tslib_fe-PostProc'][__CLASS__]   = '&Tx_Solr_IndexQueue_FrontendHelper_UserGroupDetector->disableCaching';
 		$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['tslib/class.tslib_fe.php']['configArrayPostProc'][__CLASS__] = '&Tx_Solr_IndexQueue_FrontendHelper_UserGroupDetector->deactivateTcaFrontendGroupEnableFields';
+		$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['tslib/class.tslib_fe.php']['hook_checkEnableFields'][__CLASS__] = '&Tx_Solr_IndexQueue_FrontendHelper_UserGroupDetector->checkEnableFields';
 
 		$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['t3lib/class.t3lib_page.php']['getPage'][__CLASS__]           = '&Tx_Solr_IndexQueue_FrontendHelper_UserGroupDetector';
 		$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['t3lib/class.t3lib_page.php']['getPageOverlay'][__CLASS__]    = '&Tx_Solr_IndexQueue_FrontendHelper_UserGroupDetector';
 
 		$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['tslib/class.tslib_content.php']['postInit'][__CLASS__]       = '&Tx_Solr_IndexQueue_FrontendHelper_UserGroupDetector';
 	}
 
+	/**
+	 * Disables the group access check by resetting the fe_group field in the given page table row.
+	 * Will be called by the hook in the TypoScriptFrontendController in the checkEnableFields() method.
+	 *
+	 * @param array $parameters
+	 * @param \TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController $tsfe
+	 * @see \TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController::checkEnableFields()
+	 */
+	public function checkEnableFields($parameters, $tsfe) {
+		$parameters['row']['fe_group'] = '';
+	}
+
 	/**
 	 * Deactivates the frontend user grroup fields in TCA so that no access
 	 * restrictions apply during page rendering.