FileLinkHandler.php

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<?php
 
/*
 * 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!
 */
 
namespace ‪TYPO3\CMS\Recordlist\LinkHandler;
 
use Psr\Http\Message\ServerRequestInterface;
use ‪TYPO3\CMS\Backend\Tree\View\ElementBrowserFolderTreeView;
use ‪TYPO3\CMS\Core\Imaging\Icon;
use ‪TYPO3\CMS\Core\LinkHandling\LinkService;
use ‪TYPO3\CMS\Core\Page\PageRenderer;
use ‪TYPO3\CMS\Core\Resource\File;
use ‪TYPO3\CMS\Core\Resource\FileInterface;
use ‪TYPO3\CMS\Core\Resource\Filter\FileExtensionFilter;
use ‪TYPO3\CMS\Core\Resource\Folder;
use ‪TYPO3\CMS\Core\Resource\ResourceFactory;
use ‪TYPO3\CMS\Core\Resource\ResourceInterface;
use ‪TYPO3\CMS\Core\Utility\GeneralUtility;
use ‪TYPO3\CMS\Recordlist\Tree\View\LinkParameterProviderInterface;
use ‪TYPO3\CMS\Recordlist\View\FolderUtilityRenderer;
 
class ‪FileLinkHandler extends ‪AbstractLinkHandler implements ‪LinkHandlerInterface, ‪LinkParameterProviderInterface
{
    protected ‪$linkParts = [];
 
    protected ‪$expectedClass = File::class;
 
    protected ‪$mode = 'file';
 
    protected ‪$expandFolder;
 
    public function ‪canHandleLink(array ‪$linkParts)
    {
        if (!‪$linkParts['url']) {
            return false;
        }
        if (isset(‪$linkParts['url'][$this->mode]) && ‪$linkParts['url'][$this->mode] instanceof $this->expectedClass) {
            $this->linkParts = ‪$linkParts;
            return true;
        }
        return false;
    }
 
    public function ‪formatCurrentUrl()
    {
        return $this->linkParts['url'][‪$this->mode]->getName();
    }
 
    public function ‪render(ServerRequestInterface $request)
    {
        GeneralUtility::makeInstance(PageRenderer::class)->loadRequireJsModule('TYPO3/CMS/Recordlist/FileLinkHandler');
 
        $folderTree = GeneralUtility::makeInstance(ElementBrowserFolderTreeView::class);
        $folderTree->setLinkParameterProvider($this);
        $this->view->assign('tree', $folderTree->getBrowsableTree());
 
        $this->‪expandFolder = $request->getQueryParams()['expandFolder'] ?? null;
        if (!empty($this->linkParts) && !isset($this->‪expandFolder)) {
            $this->‪expandFolder = $this->linkParts['url'][‪$this->mode];
            if ($this->‪expandFolder instanceof File) {
                $this->‪expandFolder = $this->‪expandFolder->getParentFolder();
            }
            if ($this->‪expandFolder instanceof Folder) {
                $this->‪expandFolder = $this->‪expandFolder->getCombinedIdentifier();
            }
        }
 
        // Create upload/create folder forms, if a path is given
        $selectedFolder = $this->‪getSelectedFolder($this->‪expandFolder);
 
        // Build the file upload and folder creation form
        if ($selectedFolder) {
            $folderUtilityRenderer = GeneralUtility::makeInstance(FolderUtilityRenderer::class, $this);
            $uploadForm = $this->mode === 'file' ? $folderUtilityRenderer->uploadForm($selectedFolder, []) : '';
            $createFolder = $folderUtilityRenderer->createFolder($selectedFolder);
 
            $this->view->assign('uploadFileForm', $uploadForm);
            $this->view->assign('createFolderForm', $createFolder);
 
            // Render the file or folderlist
            if ($selectedFolder->checkActionPermission('read')) {
                $this->view->assign('selectedFolder', $selectedFolder);
                $parameters = $this->linkBrowser->getParameters();
                $allowedExtensions = $parameters['params']['allowedExtensions'] ?? '';
                $this->‪expandFolder($selectedFolder, $allowedExtensions);
            }
        }
 
        return $this->view->render(ucfirst($this->mode));
    }
 
    public function ‪expandFolder(Folder $folder, $extensionList = '')
    {
        // Create header element; The folder from which files are listed.
        $folderIcon = $this->iconFactory->getIconForResource($folder, ‪Icon::SIZE_SMALL)->render();
        $this->view->assign('selectedFolderIcon', $folderIcon);
        $this->view->assign('selectedFolderTitle', GeneralUtility::fixed_lgd_cs($folder->getIdentifier(), (int)$this->getBackendUser()->uc['titleLen']));
        $this->view->assign('selectedFolderUrl', GeneralUtility::makeInstance(LinkService::class)->asString(['type' => ‪LinkService::TYPE_FOLDER, 'folder' => $folder]));
        if ($this->mode === 'file') {
            $this->view->assign('currentIdentifier', !empty($this->linkParts) ? $this->linkParts['url']['file']->getUid() : '');
        } else {
            $this->view->assign('currentIdentifier', !empty($this->linkParts) ? $this->linkParts['url']['folder']->getCombinedIdentifier() : '');
        }
 
        // Get files from the folder:
        $fileObjects = $this->‪getFolderContent($folder, $extensionList);
        $itemsInSelectedFolder = [];
        if (!empty($fileObjects)) {
            foreach ($fileObjects as $fileOrFolderObject) {
                $itemsInSelectedFolder[] = $this->‪renderItem($fileOrFolderObject);
            }
        }
        $this->view->assign('itemsInSelectedFolder', $itemsInSelectedFolder);
    }
 
    protected function ‪getFolderContent(Folder $folder, $extensionList)
    {
        if ($extensionList !== '') {
            $filter = GeneralUtility::makeInstance(FileExtensionFilter::class);
            $filter->setAllowedFileExtensions($extensionList);
            $folder->setFileAndFolderNameFilters([[$filter, 'filterFileList']]);
        }
        return $folder->getFiles();
    }
 
    protected function ‪renderItem(ResourceInterface $fileOrFolderObject)
    {
        if (!$fileOrFolderObject instanceof File) {
            throw new \InvalidArgumentException('Expected File object, got "' . get_class($fileOrFolderObject) . '" object.', 1443651368);
        }
        // Get size and icon:
        $size = GeneralUtility::formatSize(
            (int)$fileOrFolderObject->getSize(),
            $this->getLanguageService()->sL('LLL:EXT:core/Resources/Private/Language/locallang_common.xlf:byteSizeUnits')
        );
 
        return [
            'icon' => $this->iconFactory->getIconForResource($fileOrFolderObject, ‪Icon::SIZE_SMALL)->render(),
            'uid'  => $fileOrFolderObject->getUid(),
            'size' => $size,
            'name' => $fileOrFolderObject->getName(),
            'url'  => GeneralUtility::makeInstance(LinkService::class)->asString(['type' => ‪LinkService::TYPE_FILE, 'file' => $fileOrFolderObject]),
            'title' => GeneralUtility::fixed_lgd_cs($fileOrFolderObject->getName(), (int)$this->getBackendUser()->uc['titleLen'])
        ];
    }
 
    public function ‪getBodyTagAttributes()
    {
        return [
            'data-current-link' => GeneralUtility::makeInstance(LinkService::class)->asString(['type' => ‪LinkService::TYPE_FILE, 'file' => $this->linkParts['url']['file']])
        ];
    }
 
    public function ‪getUrlParameters(array $values)
    {
        $parameters = [
            'expandFolder' => $values['identifier'] ?? ‪$this->expandFolder
        ];
        return array_merge($this->linkBrowser->getUrlParameters($values), $parameters);
    }
 
    public function ‪isCurrentlySelectedItem(array $values)
    {
        return false;
    }
 
    public function ‪getScriptUrl()
    {
        return $this->linkBrowser->getScriptUrl();
    }
 
    protected function ‪getSelectedFolder($folderIdentifier = '')
    {
        $selectedFolder = false;
        if ($folderIdentifier) {
            try {
                $fileOrFolderObject = GeneralUtility::makeInstance(ResourceFactory::class)->retrieveFileOrFolderObject($folderIdentifier);
                if ($fileOrFolderObject instanceof Folder) {
                    // It's a folder
                    $selectedFolder = $fileOrFolderObject;
                } elseif ($fileOrFolderObject instanceof FileInterface) {
                    // It's a file
                    try {
                        $selectedFolder = $fileOrFolderObject->getParentFolder();
                    } catch (\Exception $e) {
                        // Accessing the parent folder failed for some reason. e.g. permissions
                    }
                }
            } catch (\Exception $e) {
                // No path is selected
            }
        }
 
        // If no folder is selected, get the user's default upload folder
        if (!$selectedFolder) {
            try {
                $selectedFolder = $this->‪getBackendUser()->‪getDefaultUploadFolder();
            } catch (\Exception $e) {
                // The configured default user folder does not exist
            }
        }
        return $selectedFolder;
    }
}