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typo3/sysext/fluid/Classes/ViewHelpers/Security/IfAuthenticatedViewHelper.php

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+<?php
+namespace TYPO3\CMS\Fluid\ViewHelpers\Security;
+
+/*
+ * This file is part of the TYPO3 CMS project.
+ *
+ * It is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License, either version 2
+ * of the License, or any later version.
+ *
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ *
+ * The TYPO3 project - inspiring people to share!
+ */
+
+use TYPO3\CMS\Core\Context\Context;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+use TYPO3Fluid\Fluid\Core\ViewHelper\AbstractConditionViewHelper;
+
+/**
+ * This ViewHelper implements an ifAuthenticated/else condition for frontend users.
+ *
+ * Examples
+ * ========
+ *
+ * Basic usage
+ * -----------
+ *
+ * ::
+ *
+ *    <f:security.ifAuthenticated>
+ *       This is being shown whenever a FE user is logged in
+ *    </f:security.ifAuthenticated>
+ *
+ * Everything inside the :html:`<f:security.ifAuthenticated>` tag is being displayed if
+ * current frontend user is authenticated.
+ *
+ * IfAuthenticated / then / else
+ * -----------------------------
+ *
+ * ::
+ *
+ *    <f:security.ifAuthenticated>
+ *       <f:then>
+ *          This is being shown in case you have access.
+ *       </f:then>
+ *       <f:else>
+ *          This is being displayed in case you do not have access.
+ *       </f:else>
+ *    </f:security.ifAuthenticated>
+ *
+ * Everything inside the :html:`<f:then></f:then>` tag is displayed if frontend user is authenticated.
+ * Otherwise, everything inside the :html:`<f:else></f:else>` tag is displayed.
+ */
+class IfAuthenticatedViewHelper extends AbstractConditionViewHelper
+{
+    /**
+     * This method decides if the condition is TRUE or FALSE. It can be overridden in extending viewhelpers to adjust functionality.
+     *
+     * @param array $arguments ViewHelper arguments to evaluate the condition for this ViewHelper, allows for flexiblity in overriding this method.
+     * @return bool
+     */
+    protected static function evaluateCondition($arguments = null)
+    {
+        return GeneralUtility::makeInstance(Context::class)->getPropertyFromAspect('frontend.user', 'id', 0) > 0;
+    }
+}

typo3/sysext/fluid/Classes/ViewHelpers/Security/IfHasRoleViewHelper.php

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+<?php
+namespace TYPO3\CMS\Fluid\ViewHelpers\Security;
+
+/*
+ * This file is part of the TYPO3 CMS project.
+ *
+ * It is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License, either version 2
+ * of the License, or any later version.
+ *
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ *
+ * The TYPO3 project - inspiring people to share!
+ */
+
+use TYPO3\CMS\Core\Context\Context;
+use TYPO3\CMS\Core\Context\UserAspect;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+use TYPO3Fluid\Fluid\Core\ViewHelper\AbstractConditionViewHelper;
+
+/**
+ * This ViewHelper implements an ifHasRole/else condition for frontend groups.
+ *
+ * Examples
+ * ========
+ *
+ * Basic usage
+ * -----------
+ *
+ * ::
+ *
+ *    <f:security.ifHasRole role="Administrator">
+ *        This is being shown in case the current FE user belongs to a FE usergroup (aka role) titled "Administrator" (case sensitive)
+ *    </f:security.ifHasRole>
+ *
+ * Everything inside the :html:`<f:security.ifHasRole>` tag is being displayed if the
+ * logged in frontend user belongs to the specified frontend user group.
+ * Comparison is done by comparing to title of the user groups.
+ *
+ * Using the usergroup uid as role identifier
+ * ------------------------------------------
+ *
+ * ::
+ *
+ *    <f:security.ifHasRole role="1">
+ *       This is being shown in case the current FE user belongs to a FE usergroup (aka role) with the uid "1"
+ *    </f:security.ifHasRole>
+ *
+ * Everything inside the :html:`<f:security.ifHasRole>` tag is being displayed if the
+ * logged in frontend user belongs to the specified role. Comparison is done
+ * using the ``uid`` of frontend user groups.
+ *
+ * IfRole / then / else
+ * --------------------
+ *
+ * ::
+ *
+ *    <f:security.ifHasRole role="Administrator">
+ *       <f:then>
+ *          This is being shown in case you have the role.
+ *       </f:then>
+ *       <f:else>
+ *          This is being displayed in case you do not have the role.
+ *       </f:else>
+ *    </f:security.ifHasRole>
+ *
+ * Everything inside the :html:`<f:then></f:then>` tag is displayed if the logged in FE user belongs to the specified role.
+ * Otherwise, everything inside the :html:`<f:else></f:else>` tag is displayed.
+ */
+class IfHasRoleViewHelper extends AbstractConditionViewHelper
+{
+    /**
+     * Initializes the "role" argument.
+     * Renders <f:then> child if the current logged in FE user belongs to the specified role (aka usergroup)
+     * otherwise renders <f:else> child.
+     */
+    public function initializeArguments()
+    {
+        parent::initializeArguments();
+
+        $this->registerArgument('role', 'string', 'The usergroup (either the usergroup uid or its title).');
+    }
+
+    /**
+     * This method decides if the condition is TRUE or FALSE. It can be overridden in extending viewhelpers to adjust functionality.
+     *
+     * @param array $arguments ViewHelper arguments to evaluate the condition for this ViewHelper, allows for flexiblity in overriding this method.
+     * @return bool
+     */
+    protected static function evaluateCondition($arguments = null)
+    {
+        $role = $arguments['role'];
+        /** @var UserAspect $userAspect */
+        $userAspect = GeneralUtility::makeInstance(Context::class)->getAspect('frontend.user');
+        if (!$userAspect->isLoggedIn()) {
+            return false;
+        }
+        if (is_numeric($role)) {
+            $groupIds = $userAspect->getGroupIds();
+            return in_array((int)$role, $groupIds, true);
+        }
+        return in_array($role, $userAspect->getGroupNames(), true);
+    }
+}