Integrates task for getting current version data

composer.json

@@ -52,6 +52,7 @@
   },
   "autoload": {
     "psr-4": {
+      "T3o\\Ter\\": "html/typo3conf/ext/ter/Classes",
       "T3o\\TerFe2\\": "html/typo3conf/ext/ter_fe2/Classes"
     },
     "classmap": [

html/typo3conf/ext/ter/Classes/Task/UpdateCurrentVersionListTask.php

+<?php
+namespace T3o\Ter\Task;
+
+/**
+ * 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\GeneralUtility;
+
+/**
+ * Update json file with information of core versions
+ */
+class UpdateCurrentVersionListTask extends \TYPO3\CMS\Extbase\Scheduler\Task
+{
+
+    /**
+     * Public method, usually called by scheduler
+     *
+     * @return boolean TRUE on success
+     */
+    public function execute()
+    {
+        $resultCoreData = $this->fetchCurrentCoreData();
+        $resultDocsData = $this->fetchCurrentDocumentationData();
+
+        return $resultCoreData && $resultDocsData;
+    }
+
+    /**
+     * @return boolean
+     */
+    protected function fetchCurrentCoreData()
+    {
+        $result = false;
+        $targetFile = PATH_site . $GLOBALS['TYPO3_CONF_VARS']['BE']['fileadminDir'] . 'currentcoredata.json';
+        $sourceData = GeneralUtility::getUrl('http://get.typo3.org/json');
+        if (json_decode($sourceData, true) !== null) {
+            $result = GeneralUtility::writeFile($targetFile, $sourceData);
+        }
+
+        return $result;
+    }
+
+    /**
+     * @return boolean
+     */
+    protected function fetchCurrentDocumentationData()
+    {
+        $result = false;
+        $targetFile = PATH_site . $GLOBALS['TYPO3_CONF_VARS']['BE']['fileadminDir'] . 'currentdocumentationdata.json';
+        $sourceData = GeneralUtility::getUrl('https://docs.typo3.org/typo3cms/extensions/manuals.json');
+        if (json_decode($sourceData, true) !== null) {
+            $result = GeneralUtility::writeFile($targetFile, $sourceData);
+        }
+
+        return $result;
+    }
+}

html/typo3conf/ext/ter/ext_localconf.php

@@ -13,7 +13,7 @@ $GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['scheduler']['tasks']['tx_ter_updateEx
 	'additionalFields' => 'tx_ter_updateExtensionIndexTask_additionalFieldProvider',
 ];
 // Register core version update task
-$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['scheduler']['tasks']['tx_ter_updateCurrentVersionListTask'] = [
+$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['scheduler']['tasks'][\T3o\Ter\Task\UpdateCurrentVersionListTask::class] = [
 	'extension' => $_EXTKEY,
 	'title' => 'LLL:EXT:' . $_EXTKEY . '/locallang.xml:tx_ter_updateCurrentVersionListTask.name',
 	'description' => 'LLL:EXT:' . $_EXTKEY . '/locallang.xml:tx_ter_updateCurrentVersionListTask.description',