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typo3/sysext/extensionmanager/Classes/ViewHelpers/Typo3DependencyViewHelper.php

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+<?php
+namespace TYPO3\CMS\Extensionmanager\ViewHelpers;
+
+/*
+ * 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\Utility\MathUtility;
+use TYPO3\CMS\Core\Utility\VersionNumberUtility;
+use TYPO3\CMS\Extensionmanager\Domain\Model\Dependency;
+use TYPO3\CMS\Extensionmanager\Domain\Model\Extension;
+use TYPO3Fluid\Fluid\Core\Rendering\RenderingContextInterface;
+use TYPO3Fluid\Fluid\Core\ViewHelper\AbstractViewHelper;
+use TYPO3Fluid\Fluid\Core\ViewHelper\Traits\CompileWithRenderStatic;
+
+/**
+ * Shows the version numbers of the TYPO3 dependency, if any
+ *
+ * @internal
+ */
+class Typo3DependencyViewHelper extends AbstractViewHelper
+{
+    use CompileWithRenderStatic;
+
+    /**
+     * As this ViewHelper renders HTML, the output must not be escaped.
+     *
+     * @var bool
+     */
+    protected $escapeOutput = false;
+
+    /**
+     * Initialize arguments
+     *
+     * @throws \TYPO3Fluid\Fluid\Core\ViewHelper\Exception
+     */
+    public function initializeArguments()
+    {
+        $this->registerArgument('extension', Extension::class, '', true);
+    }
+
+    /**
+     * Finds and returns the suitable TYPO3 versions of an extension
+     *
+     * @param array $arguments
+     * @param \Closure $renderChildrenClosure
+     * @param RenderingContextInterface $renderingContext
+     *
+     * @return string
+     */
+    public static function renderStatic(array $arguments, \Closure $renderChildrenClosure, RenderingContextInterface $renderingContext)
+    {
+        $extension = $arguments['extension'];
+        /** @var Dependency $dependency */
+        foreach ($extension->getDependencies() as $dependency) {
+            if ($dependency->getIdentifier() === 'typo3') {
+                $lowestVersion = $dependency->getLowestVersion();
+                $highestVersion = $dependency->getHighestVersion();
+                $cssClass = self::isVersionSuitable($lowestVersion, $highestVersion) ? 'success' : 'default';
+                return
+                    '<span class="label label-' . $cssClass . '">'
+                        . htmlspecialchars($lowestVersion) . ' - ' . htmlspecialchars($highestVersion)
+                    . '</span>';
+            }
+        }
+        return '';
+    }
+
+    /**
+     * Check if current TYPO3 version is suitable for the extension
+     *
+     * @param string $lowestVersion
+     * @param string $highestVersion
+     * @return bool
+     */
+    protected static function isVersionSuitable($lowestVersion, $highestVersion)
+    {
+        $numericTypo3Version = VersionNumberUtility::convertVersionNumberToInteger(VersionNumberUtility::getNumericTypo3Version());
+        $numericLowestVersion = VersionNumberUtility::convertVersionNumberToInteger($lowestVersion);
+        $numericHighestVersion = VersionNumberUtility::convertVersionNumberToInteger($highestVersion);
+        return MathUtility::isIntegerInRange($numericTypo3Version, $numericLowestVersion, $numericHighestVersion);
+    }
+}