ActionController.php

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<?php
namespace TYPO3\CMS\Extensionmanager\Controller;

class ActionController extends AbstractController {

    protected $installUtility;

    protected $fileHandlingUtility;

    protected $extensionModelUtility;

    protected $managementService;

    protected function toggleExtensionInstallationStateAction($extensionKey) {
        $installedExtensions = \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::getLoadedExtensionListArray();
        try {
            if (in_array($extensionKey, $installedExtensions)) {
                // uninstall
                $this->installUtility->uninstall($extensionKey);
            } else {
                // install
                $extension = $this->extensionModelUtility->mapExtensionArrayToModel(
                    $this->installUtility->enrichExtensionWithDetails($extensionKey, FALSE)
                );
                if ($this->managementService->installExtension($extension) === FALSE) {
                    $this->redirect('unresolvedDependencies', 'List', NULL, array('extensionKey' => $extensionKey));
                }
            }
        } catch (\TYPO3\CMS\Extensionmanager\Exception\ExtensionManagerException $e) {
            $this->addFlashMessage(htmlspecialchars($e->getMessage()), '', \TYPO3\CMS\Core\Messaging\FlashMessage::ERROR);
        } catch (\TYPO3\Flow\Package\Exception\PackageStatesFileNotWritableException $e) {
            $this->addFlashMessage(htmlspecialchars($e->getMessage()), '', \TYPO3\CMS\Core\Messaging\FlashMessage::ERROR);
        }
        $this->redirect('index', 'List', NULL, array(self::TRIGGER_RefreshModuleMenu => TRUE));
    }

    public function installExtensionWithoutSystemDependencyCheckAction($extensionKey) {
        $this->managementService->setSkipSystemDependencyCheck(TRUE);
        $this->forward('toggleExtensionInstallationState', NULL, NULL, array('extensionKey' => $extensionKey));
    }

    protected function removeExtensionAction($extension) {
        try {
            $this->installUtility->removeExtension($extension);
            $this->addFlashMessage(
                \TYPO3\CMS\Extbase\Utility\LocalizationUtility::translate(
                    'extensionList.remove.message',
                    'extensionmanager',
                    array(
                        'extension' => $extension,
                    )
                )
            );
        } catch (\TYPO3\CMS\Extensionmanager\Exception\ExtensionManagerException $e) {
            $this->addFlashMessage(htmlspecialchars($e->getMessage()), '', \TYPO3\CMS\Core\Messaging\FlashMessage::ERROR);
        } catch (\TYPO3\Flow\Utility\Exception $e) {
            $this->addFlashMessage(htmlspecialchars($e->getMessage()), '', \TYPO3\CMS\Core\Messaging\FlashMessage::ERROR);
        }

        return '';
    }

    protected function downloadExtensionZipAction($extension) {
        $fileName = $this->fileHandlingUtility->createZipFileFromExtension($extension);
        $this->fileHandlingUtility->sendZipFileToBrowserAndDelete($fileName);
    }

    protected function downloadExtensionDataAction($extension) {
        $error = NULL;
        $sqlData = $this->installUtility->getExtensionSqlDataDump($extension);
        $dump = $sqlData['extTables'] . $sqlData['staticSql'];
        $fileName = $extension . '_sqlDump.sql';
        $filePath = PATH_site . 'typo3temp/' . $fileName;
        $error = \TYPO3\CMS\Core\Utility\GeneralUtility::writeFileToTypo3tempDir($filePath, $dump);
        if (is_string($error)) {
            throw new \TYPO3\CMS\Extensionmanager\Exception\ExtensionManagerException($error, 1343048718);
        }
        $this->fileHandlingUtility->sendSqlDumpFileToBrowserAndDelete($filePath, $fileName);
    }
}