ModuleController.php

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<?php
namespace TYPO3\CMS\Backend\Module;

class ModuleController {

    protected $moduleMenu;

    protected $moduleMenuRepository;

    public function __construct() {
        $this->moduleMenu = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance('TYPO3\\CMS\\Backend\\Module\\ModuleStorage');
        $this->moduleMenuRepository = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance('TYPO3\\CMS\\Backend\\Domain\\Repository\\Module\\BackendModuleRepository');
    }

    public function createModuleMenu() {
        if (count($this->moduleMenu->getEntries()) === 0) {
            $moduleMenu = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance('TYPO3\\CMS\\Backend\\View\\ModuleMenuView');
            $rawData = $moduleMenu->getRawModuleData();
            $this->convertRawModuleDataToModuleMenuObject($rawData);
            $this->createMenuEntriesForTbeModulesExt();
        }
    }

    protected function convertRawModuleDataToModuleMenuObject(array $rawModuleData) {
        foreach ($rawModuleData as $module) {
            $entry = $this->createEntryFromRawData($module);
            if (isset($module['subitems']) && count($module['subitems']) > 0) {
                foreach ($module['subitems'] as $subitem) {
                    $subEntry = $this->createEntryFromRawData($subitem);
                    $entry->addChild($subEntry);
                }
            }
            $this->moduleMenu->attachEntry($entry);
        }
    }

    protected function createEntryFromRawData(array $module) {
        $entry = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance('TYPO3\\CMS\\Backend\\Domain\\Model\\Module\\BackendModule');
        if (!empty($module['name']) && is_string($module['name'])) {
            $entry->setName($module['name']);
        }
        if (!empty($module['title']) && is_string($module['title'])) {
            $entry->setTitle($this->getLanguageService()->sL($module['title']));
        }
        if (!empty($module['onclick']) && is_string($module['onclick'])) {
            $entry->setOnClick($module['onclick']);
        }
        if (!empty($module['link']) && is_string($module['link'])) {
            $entry->setLink($module['link']);
        }
        if (empty($module['link']) && !empty($module['path']) && is_string($module['path'])) {
            $entry->setLink($module['path']);
        }
        if (!empty($module['description']) && is_string($module['description'])) {
            $entry->setDescription($module['description']);
        }
        if (!empty($module['icon']) && is_array($module['icon'])) {
            $entry->setIcon($module['icon']);
        }
        if (!empty($module['navigationComponentId']) && is_string($module['navigationComponentId'])) {
            $entry->setNavigationComponentId($module['navigationComponentId']);
        }
        return $entry;
    }

    protected function createMenuEntriesForTbeModulesExt() {
        foreach ($GLOBALS['TBE_MODULES_EXT'] as $mainModule => $tbeModuleExt) {
            list($main) = explode('_', $mainModule);
            $mainEntry = $this->moduleMenuRepository->findByModuleName($main);
            if ($mainEntry !== FALSE) {
                $subEntries = $mainEntry->getChildren();
                if (count($subEntries) > 0) {
                    $matchingSubEntry = $this->moduleMenuRepository->findByModuleName($mainModule);
                    if ($matchingSubEntry !== FALSE) {
                        if (array_key_exists('MOD_MENU', $tbeModuleExt) && array_key_exists('function', $tbeModuleExt['MOD_MENU'])) {
                            foreach ($tbeModuleExt['MOD_MENU']['function'] as $subModule) {
                                $entry = $this->createEntryFromRawData($subModule);
                                $matchingSubEntry->addChild($entry);
                            }
                        }
                    }
                }
            }
        }
    }

    protected function getLanguageService() {
        return $GLOBALS['LANG'];
    }
}