FolderTreeView.php

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<?php
namespace TYPO3\CMS\Backend\Tree\View;

use TYPO3\CMS\Backend\Utility\IconUtility;
use TYPO3\CMS\Core\Messaging\FlashMessage;
use TYPO3\CMS\Core\Resource\FolderInterface;
use TYPO3\CMS\Core\Utility\GeneralUtility;
use TYPO3\CMS\Lang\LanguageService;

class FolderTreeView extends \TYPO3\CMS\Backend\Tree\View\AbstractTreeView {

    protected $storages = NULL;

    protected $storageHashNumbers;

    protected $ajaxStatus = FALSE;

    protected $scope;

    public function __construct() {
        parent::init();
        $this->storages = $this->BE_USER->getFileStorages();
        $this->treeName = 'folder';
        // Don't apply any title
        $this->titleAttrib = '';
        $this->domIdPrefix = 'folder';
    }

    public function PMicon(\TYPO3\CMS\Core\Resource\Folder $folderObject, $subFolderCounter, $totalSubFolders, $nextCount, $isExpanded) {
        $PM = $nextCount ? ($isExpanded ? 'minus' : 'plus') : 'join';
        $BTM = $subFolderCounter == $totalSubFolders ? 'bottom' : '';
        $icon = '<img' . IconUtility::skinImg($this->backPath, ('gfx/ol/' . $PM . $BTM . '.gif'), 'width="18" height="16"') . ' alt="" />';
        if ($nextCount) {
            $cmd = $this->generateExpandCollapseParameter($this->bank, !$isExpanded, $folderObject);
            $icon = $this->PMiconATagWrap($icon, $cmd, !$isExpanded);
        }
        return $icon;
    }

    public function PMiconATagWrap($icon, $cmd, $isExpand = TRUE) {

        if (empty($this->scope)) {
            $this->scope = array(
                'class' => get_class($this),
                'script' => $this->thisScript,
                'ext_noTempRecyclerDirs' => $this->ext_noTempRecyclerDirs,
                'browser' => array(
                    'mode' => $GLOBALS['SOBE']->browser->mode,
                    'act' => $GLOBALS['SOBE']->browser->act,
                ),
            );
        }

        if ($this->thisScript) {
            // Activates dynamic AJAX based tree
            $scopeData = serialize($this->scope);
            $scopeHash = GeneralUtility::hmac($scopeData);
            $js = htmlspecialchars('Tree.load(' . GeneralUtility::quoteJSvalue($cmd) . ', ' . (int)$isExpand . ', this, ' . GeneralUtility::quoteJSvalue($scopeData) . ', ' . GeneralUtility::quoteJSvalue($scopeHash) . ');');
            return '<a class="pm" onclick="' . $js . '">' . $icon . '</a>';
        } else {
            return $icon;
        }
    }

    public function wrapIcon($icon, \TYPO3\CMS\Core\Resource\Folder $folderObject) {
        // Add title attribute to input icon tag
        $theFolderIcon = '';
        // Wrap icon in click-menu link.
        if (!$this->ext_IconMode) {
            // Check storage access to wrap with click menu
            if (!$folderObject instanceof \TYPO3\CMS\Core\Resource\InaccessibleFolder) {
                $theFolderIcon = $GLOBALS['TBE_TEMPLATE']->wrapClickMenuOnIcon($icon, $folderObject->getCombinedIdentifier(), '', 0);
            }
        } elseif ($this->ext_IconMode === 'titlelink') {
            $aOnClick = 'return jumpTo(\'' . $this->getJumpToParam($folderObject) . '\',this,\'' . $this->domIdPrefix . $this->getId($folderObject) . '\',' . $this->bank . ');';
            $theFolderIcon = '<a href="#" onclick="' . htmlspecialchars($aOnClick) . '">' . $icon . '</a>';
        }
        return $theFolderIcon;
    }

    public function wrapTitle($title, \TYPO3\CMS\Core\Resource\Folder $folderObject, $bank = 0) {
        // Check storage access to wrap with click menu
        if ($folderObject instanceof \TYPO3\CMS\Core\Resource\InaccessibleFolder) {
            return $title;
        }
        $aOnClick = 'return jumpTo(\'' . $this->getJumpToParam($folderObject) . '\', this, \'' . $this->domIdPrefix . $this->getId($folderObject) . '\', ' . $bank . ');';
        $CSM = ' oncontextmenu="' . htmlspecialchars($GLOBALS['TBE_TEMPLATE']->wrapClickMenuOnIcon('', $folderObject->getCombinedIdentifier(), '', 0, ('&bank=' . $this->bank), '', TRUE)) . '"';

        return '<a href="#" title="' . htmlspecialchars($title) . '" onclick="' . htmlspecialchars($aOnClick) . '"' . $CSM . '>' . $title . '</a>';
    }

    public function getId(\TYPO3\CMS\Core\Resource\Folder $folderObject) {
        return GeneralUtility::md5Int($folderObject->getCombinedIdentifier());
    }

    public function getJumpToParam(\TYPO3\CMS\Core\Resource\Folder $folderObject) {
        return rawurlencode($folderObject->getCombinedIdentifier());
    }

    public function getTitleStr($row, $titleLen = 30) {
        return $row['_title'] ?: parent::getTitleStr($row, $titleLen);
    }

    public function getTitleAttrib(\TYPO3\CMS\Core\Resource\Folder $folderObject) {
        return htmlspecialchars($folderObject->getName());
    }

    public function getBrowsableTree() {
        // Get stored tree structure AND updating it if needed according to incoming PM GET var.
        $this->initializePositionSaving();
        // Init done:
        $treeItems = array();
        // Traverse mounts:
        foreach ($this->storages as $storageObject) {
            $this->getBrowseableTreeForStorage($storageObject);
            // Add tree:
            $treeItems = array_merge($treeItems, $this->tree);
            // if this is an AJAX call, don't run through all mounts, only
            // show the expansion of the current one, not the rest of the mounts
            if (TYPO3_REQUESTTYPE & TYPO3_REQUESTTYPE_AJAX) {

            }
        }
        return $this->printTree($treeItems);
    }

    public function getBrowseableTreeForStorage(\TYPO3\CMS\Core\Resource\ResourceStorage $storageObject) {
        // If there are filemounts, show each, otherwise just the rootlevel folder
        $fileMounts = $storageObject->getFileMounts();
        $rootLevelFolders = array();
        if (count($fileMounts)) {
            foreach ($fileMounts as $fileMountInfo) {
                $rootLevelFolders[] = array(
                    'folder' => $fileMountInfo['folder'],
                    'name' => $fileMountInfo['title']
                );
            }
        } elseif ($this->BE_USER->isAdmin()) {
            $rootLevelFolders[] = array(
                'folder' => $storageObject->getRootLevelFolder(),
                'name' => $storageObject->getName()
            );
        }
        // Clean the tree
        $this->reset();
        // Go through all "root level folders" of this tree (can be the rootlevel folder or any file mount points)
        foreach ($rootLevelFolders as $rootLevelFolderInfo) {
            $rootLevelFolder = $rootLevelFolderInfo['folder'];
            $rootLevelFolderName = $rootLevelFolderInfo['name'];
            $folderHashSpecUID = GeneralUtility::md5int($rootLevelFolder->getCombinedIdentifier());
            $this->specUIDmap[$folderHashSpecUID] = $rootLevelFolder->getCombinedIdentifier();
            // Hash key
            $storageHashNumber = $this->getShortHashNumberForStorage($storageObject, $rootLevelFolder);
            // Set first:
            $this->bank = $storageHashNumber;
            $isOpen = $this->stored[$storageHashNumber][$folderHashSpecUID] || $this->expandFirst;
            // Set PM icon:
            $cmd = $this->generateExpandCollapseParameter($this->bank, !$isOpen, $rootLevelFolder);
            if (!$storageObject->isBrowsable() || $this->getNumberOfSubfolders($rootLevelFolder) === 0) {
                $rootIcon = 'blank';
            } elseif (!$isOpen) {
                $rootIcon = 'plusonly';
            } else {
                $rootIcon = 'minusonly';
            }
            $icon = '<img' . IconUtility::skinImg($this->backPath, ('gfx/ol/' . $rootIcon . '.gif')) . ' alt="" />';
            // Only link icon if storage is browseable
            if (in_array($rootIcon, array('minusonly', 'plusonly'))) {
                $firstHtml = $this->PM_ATagWrap($icon, $cmd);
            } else {
                $firstHtml = $icon;
            }
            // Mark a storage which is not online, as offline
            // maybe someday there will be a special icon for this
            if ($storageObject->isOnline() === FALSE) {
                $rootLevelFolderName .= ' (' . $this->getLanguageService()->sL('LLL:EXT:lang/locallang_mod_file.xlf:sys_file_storage.isOffline') . ')';
            }
            // Preparing rootRec for the mount
            $firstHtml .= $this->wrapIcon(IconUtility::getSpriteIconForResource($rootLevelFolder, array('mount-root' => TRUE)), $rootLevelFolder);
            $row = array(
                'uid' => $folderHashSpecUID,
                'title' => $rootLevelFolderName,
                'path' => $rootLevelFolder->getCombinedIdentifier(),
                'folder' => $rootLevelFolder
            );
            // Add the storage root to ->tree
            $this->tree[] = array(
                'HTML' => $firstHtml,
                'row' => $row,
                'bank' => $this->bank,
                // hasSub is TRUE when the root of the storage is expanded
                'hasSub' => $isOpen && $storageObject->isBrowsable()
            );
            // If the mount is expanded, go down:
            if ($isOpen && $storageObject->isBrowsable()) {
                // Set depth:
                $this->getFolderTree($rootLevelFolder, 999);
            }
        }
    }

    public function getFolderTree(\TYPO3\CMS\Core\Resource\Folder $folderObject, $depth = 999, $type = '') {
        $depth = (int)$depth;

        // This generates the directory tree
        /* array of \TYPO3\CMS\Core\Resource\Folder */
        if ($folderObject instanceof \TYPO3\CMS\Core\Resource\InaccessibleFolder) {
            $subFolders = array();
        } else {
            $subFolders = $folderObject->getSubfolders();
            $subFolders = \TYPO3\CMS\Core\Resource\Utility\ListUtility::resolveSpecialFolderNames($subFolders);
            uksort($subFolders, 'strnatcasecmp');
        }

        $totalSubFolders = count($subFolders);
        $HTML = '';
        $subFolderCounter = 0;
        foreach ($subFolders as $subFolderName => $subFolder) {
            $subFolderCounter++;
            // Reserve space.
            $this->tree[] = array();
            // Get the key for this space
            end($this->tree);
            $isLocked = $subFolder instanceof \TYPO3\CMS\Core\Resource\InaccessibleFolder;
            $treeKey = key($this->tree);
            $specUID = GeneralUtility::md5int($subFolder->getCombinedIdentifier());
            $this->specUIDmap[$specUID] = $subFolder->getCombinedIdentifier();
            $row = array(
                'uid' => $specUID,
                'path' => $subFolder->getCombinedIdentifier(),
                'title' => $subFolderName,
                'folder' => $subFolder
            );
            // Make a recursive call to the next level
            if (!$isLocked && $depth > 1 && $this->expandNext($specUID)) {
                $nextCount = $this->getFolderTree($subFolder, $depth - 1, $type);
                // Set "did expand" flag
                $isOpen = 1;
            } else {
                $nextCount = $isLocked ? 0 : $this->getNumberOfSubfolders($subFolder);
                // Clear "did expand" flag
                $isOpen = 0;
            }
            // Set HTML-icons, if any:
            if ($this->makeHTML) {
                $HTML = $this->PMicon($subFolder, $subFolderCounter, $totalSubFolders, $nextCount, $isOpen);
                $type = '';

                $role = $subFolder->getRole();
                if ($role !== FolderInterface::ROLE_DEFAULT) {
                    $row['_title'] = '<strong>' . $subFolderName . '</strong>';
                }
                $icon = IconUtility::getSpriteIconForResource($subFolder, array('title' => $subFolderName, 'folder-open' => (bool)$isOpen));
                $HTML .= $this->wrapIcon($icon, $subFolder);
            }
            // Finally, add the row/HTML content to the ->tree array in the reserved key.
            $this->tree[$treeKey] = array(
                'row' => $row,
                'HTML' => $HTML,
                'hasSub' => $nextCount && $this->expandNext($specUID),
                'isFirst' => $subFolderCounter == 1,
                'isLast' => FALSE,
                'invertedDepth' => $depth,
                'bank' => $this->bank
            );
        }
        if ($subFolderCounter > 0) {
            $this->tree[$treeKey]['isLast'] = TRUE;
        }
        return $totalSubFolders;
    }

    public function printTree($treeItems = '') {
        $doExpand = FALSE;
        $doCollapse = FALSE;
        $ajaxOutput = '';
        $titleLength = (int)$this->BE_USER->uc['titleLen'];
        if (!is_array($treeItems)) {
            $treeItems = $this->tree;
        }

        if (empty($treeItems)) {
            $message = GeneralUtility::makeInstance(
                'TYPO3\\CMS\\Core\\Messaging\\FlashMessage',
                $this->getLanguageService()->sL('LLL:EXT:backend/Resources/Private/Language/locallang_errors.xlf:foldertreeview.noFolders.message'),
                $this->getLanguageService()->sL('LLL:EXT:backend/Resources/Private/Language/locallang_errors.xlf:foldertreeview.noFolders.title'),
                FlashMessage::INFO
            );
            return $message->render();
        }

        $out = '
            <!-- TYPO3 folder tree structure. -->
            <ul class="tree" id="treeRoot">
        ';
        // Evaluate AJAX request
        if (TYPO3_REQUESTTYPE & TYPO3_REQUESTTYPE_AJAX) {
            list(, $expandCollapseCommand, $expandedFolderHash, ) = $this->evaluateExpandCollapseParameter();
            if ($expandCollapseCommand == 1) {
                // We don't know yet. Will be set later.
                $invertedDepthOfAjaxRequestedItem = 0;
                $doExpand = TRUE;
            } else {
                $doCollapse = TRUE;
            }
        }
        // We need to count the opened <ul>'s every time we dig into another level,
        // so we know how many we have to close when all children are done rendering
        $closeDepth = array();
        foreach ($treeItems as $treeItem) {
            $folderObject = $treeItem['row']['folder'];
            $classAttr = $treeItem['row']['_CSSCLASS'];
            $folderIdentifier = $folderObject->getCombinedIdentifier();
            // this is set if the AJAX request has just opened this folder (via the PM command)
            $isExpandedFolderIdentifier = $expandedFolderHash == GeneralUtility::md5int($folderIdentifier);
            $idAttr = htmlspecialchars($this->domIdPrefix . $this->getId($folderObject) . '_' . $treeItem['bank']);
            $itemHTML = '';
            // If this item is the start of a new level,
            // then a new level <ul> is needed, but not in ajax mode
            if ($treeItem['isFirst'] && !$doCollapse && !($doExpand && $isExpandedFolderIdentifier)) {
                $itemHTML = '<ul>
';
            }
            // Add CSS classes to the list item
            if ($treeItem['hasSub']) {
                $classAttr .= ' expanded';
            }
            if ($treeItem['isLast']) {
                $classAttr .= ' last';
            }
            $itemHTML .= '
                <li id="' . $idAttr . '" ' . ($classAttr ? ' class="' . trim($classAttr) . '"' : '') . '><div class="treeLinkItem">' . $treeItem['HTML'] . $this->wrapTitle($this->getTitleStr($treeItem['row'], $titleLength), $folderObject, $treeItem['bank']) . '</div>';
            if (!$treeItem['hasSub']) {
                $itemHTML .= '</li>
';
            }
            // We have to remember if this is the last one
            // on level X so the last child on level X+1 closes the <ul>-tag
            if ($treeItem['isLast'] && !($doExpand && $isExpandedFolderIdentifier)) {
                $closeDepth[$treeItem['invertedDepth']] = 1;
            }
            // If this is the last one and does not have subitems, we need to close
            // the tree as long as the upper levels have last items too
            if ($treeItem['isLast'] && !$treeItem['hasSub'] && !$doCollapse && !($doExpand && $isExpandedFolderIdentifier)) {
                for ($i = $treeItem['invertedDepth']; $closeDepth[$i] == 1; $i++) {
                    $closeDepth[$i] = 0;
                    $itemHTML .= '</ul></li>
';
                }
            }
            // Ajax request: collapse
            if ($doCollapse && $isExpandedFolderIdentifier) {
                $this->ajaxStatus = TRUE;
                return $itemHTML;
            }
            // Ajax request: expand
            if ($doExpand && $isExpandedFolderIdentifier) {
                $ajaxOutput .= $itemHTML;
                $invertedDepthOfAjaxRequestedItem = $treeItem['invertedDepth'];
            } elseif ($invertedDepthOfAjaxRequestedItem) {
                if ($treeItem['invertedDepth'] < $invertedDepthOfAjaxRequestedItem) {
                    $ajaxOutput .= $itemHTML;
                } else {
                    $this->ajaxStatus = TRUE;
                    return $ajaxOutput;
                }
            }
            $out .= $itemHTML;
        }
        // If this is a AJAX request, output directly
        if ($ajaxOutput) {
            $this->ajaxStatus = TRUE;
            return $ajaxOutput;
        }
        // Finally close the first ul
        $out .= '</ul>
';
        return $out;
    }

    public function getNumberOfSubfolders(\TYPO3\CMS\Core\Resource\Folder $folderObject) {
        $subFolders = $folderObject->getSubfolders();
        return count($subFolders);
    }

    public function initializePositionSaving() {
        // Get stored tree structure:
        $this->stored = unserialize($this->BE_USER->uc['browseTrees'][$this->treeName]);
        $this->getShortHashNumberForStorage();
        // PM action:
        // (If an plus/minus icon has been clicked,
        // the PM GET var is sent and we must update the stored positions in the tree):
        // 0: mount key, 1: set/clear boolean, 2: item ID (cannot contain "_"), 3: treeName
        list($storageHashNumber, $doExpand, $numericFolderHash, $treeName) = $this->evaluateExpandCollapseParameter();
        if ($treeName && $treeName == $this->treeName) {
            if (in_array($storageHashNumber, $this->storageHashNumbers)) {
                if ($doExpand == 1) {
                    // Set
                    $this->stored[$storageHashNumber][$numericFolderHash] = 1;
                } else {
                    // Clear
                    unset($this->stored[$storageHashNumber][$numericFolderHash]);
                }
                $this->savePosition();
            }
        }
    }

    protected function getShortHashNumberForStorage(\TYPO3\CMS\Core\Resource\ResourceStorage $storageObject = NULL, \TYPO3\CMS\Core\Resource\Folder $startingPointFolder = NULL) {
        if (!$this->storageHashNumbers) {
            $this->storageHashNumbers = array();
            // Mapping md5-hash to shorter number:
            $hashMap = array();
            foreach ($this->storages as $storageUid => $storage) {
                $fileMounts = $storage->getFileMounts();
                if (count($fileMounts)) {
                    foreach ($fileMounts as $fileMount) {
                        $nkey = hexdec(substr(GeneralUtility::md5int($fileMount['folder']->getCombinedIdentifier()), 0, 4));
                        $this->storageHashNumbers[$storageUid . $fileMount['folder']->getCombinedIdentifier()] = $nkey;
                    }
                } else {
                    $folder = $storage->getRootLevelFolder();
                    $nkey = hexdec(substr(GeneralUtility::md5int($folder->getCombinedIdentifier()), 0, 4));
                    $this->storageHashNumbers[$storageUid . $folder->getCombinedIdentifier()] = $nkey;
                }
            }
        }
        if ($storageObject) {
            if ($startingPointFolder) {
                return $this->storageHashNumbers[$storageObject->getUid() . $startingPointFolder->getCombinedIdentifier()];
            } else {
                return $this->storageHashNumbers[$storageObject->getUid()];
            }
        } else {
            return NULL;
        }
    }

    protected function evaluateExpandCollapseParameter($PM = NULL) {
        if ($PM === NULL) {
            $PM = GeneralUtility::_GP('PM');
            // IE takes anchor as parameter
            if (($PMpos = strpos($PM, '#')) !== FALSE) {
                $PM = substr($PM, 0, $PMpos);
            }
        }
        // Take the first three parameters
        list($mountKey, $doExpand, $folderIdentifier) = explode('_', $PM, 3);
        // In case the folder identifier contains "_", we just need to get the fourth/last parameter
        list($folderIdentifier, $treeName) = GeneralUtility::revExplode('_', $folderIdentifier, 2);
        return array(
            $mountKey,
            $doExpand,
            $folderIdentifier,
            $treeName
        );
    }

    protected function generateExpandCollapseParameter($mountKey = NULL, $doExpand = FALSE, \TYPO3\CMS\Core\Resource\Folder $folderObject = NULL, $treeName = NULL) {
        $parts = array(
            $mountKey !== NULL ? $mountKey : $this->bank,
            $doExpand == 1 ? 1 : 0,
            $folderObject !== NULL ? GeneralUtility::md5int($folderObject->getCombinedIdentifier()) : '',
            $treeName !== NULL ? $treeName : $this->treeName
        );
        return implode('_', $parts);
    }

    public function getAjaxStatus() {
        return $this->ajaxStatus;
    }

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

}