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<?php
/**
* AssetAdmin is the 'file store' section of the CMS.
* It provides an interface for maniupating the File and Folder objects in the system.
*
* @package cms
* @subpackage assets
*/
class AssetAdmin extends LeftAndMain implements PermissionProvider{

static $url_segment = 'assets';

static $url_rule = '/$Action/$ID';

static $menu_title = 'Files';

public static $tree_class = 'Folder';

/**
* @see Upload->allowedMaxFileSize
* @var int
*/
public static $allowed_max_file_size;

public static $allowed_actions = array(
'addfolder',
'delete',
'DeleteItemsForm',
'getsubtree',
'movemarked',
'removefile',
'savefile',
'deleteUnusedThumbnails' => 'ADMIN',
'doSync',
'filter',
);

/**
* Return fake-ID "root" if no ID is found (needed to upload files into the root-folder)
*/
public function currentPageID() {
if(is_numeric($this->request->requestVar('ID'))) {
return $this->request->requestVar('ID');
} elseif (is_numeric($this->urlParams['ID'])) {
return $this->urlParams['ID'];
} elseif(Session::get("{$this->class}.currentPage")) {
return Session::get("{$this->class}.currentPage");
} else {
return 0;
}
}

/**
* Set up the controller, in particular, re-sync the File database with the assets folder./
*/
public function init() {
parent::init();

// Create base folder if it doesnt exist already
if(!file_exists(ASSETS_PATH)) Filesystem::makeFolder(ASSETS_PATH);

Requirements::javascript(CMS_DIR . "/javascript/AssetAdmin.js");
Requirements::javascript(CMS_DIR . '/javascript/CMSMain.GridField.js');
Requirements::add_i18n_javascript(CMS_DIR . '/javascript/lang', false, true);
Requirements::css(CMS_DIR . "/css/screen.css");
$frameworkDir = FRAMEWORK_DIR;
Requirements::customScript(<<<JS
_TREE_ICONS = {};
_TREE_ICONS['Folder'] = {
fileIcon: '$frameworkDir/javascript/tree/images/page-closedfolder.gif',
openFolderIcon: '$frameworkDir/javascript/tree/images/page-openfolder.gif',
closedFolderIcon: '$frameworkDir/javascript/tree/images/page-closedfolder.gif'
};
JS
);

CMSBatchActionHandler::register('delete', 'AssetAdmin_DeleteBatchAction', 'Folder');
}

/**
* Returns the files and subfolders contained in the currently selected folder,
* defaulting to the root node. Doubles as search results, if any search parameters
* are set through {@link SearchForm()}.
*
* @return SS_List
*/
public function getList() {
$folder = $this->currentPage();
$context = $this->getSearchContext();
// Overwrite name filter to search both Name and Title attributes
$context->removeFilterByName('Name');
$params = $this->request->requestVar('q');
$list = $context->getResults($params);

// Don't filter list when a detail view is requested,
// to avoid edge cases where the filtered list wouldn't contain the requested
// record due to faulty session state (current folder not always encoded in URL, see #7408).
if(!$folder->ID && ($this->request->param('ID') == 'field')) {
return $list;
}

// Re-add previously removed "Name" filter as combined filter
// TODO Replace with composite SearchFilter once that API exists
if(isset($params['Name'])) {
$list = $list->where(sprintf(
'"Name" LIKE \'%%%s%%\' OR "Title" LIKE \'%%%s%%\'',
Convert::raw2sql($params['Name']),
Convert::raw2sql($params['Name'])
));
}

// Always show folders at the top
$list = $list->sort('(CASE WHEN "File"."ClassName" = \'Folder\' THEN 0 ELSE 1 END), "Name"');

// If a search is conducted, check for the "current folder" limitation.
// Otherwise limit by the current folder as denoted by the URL.
if(!$params || @$params['CurrentFolderOnly']) {
$list = $list->filter('ParentID', $folder->ID);
}

// Category filter
if(isset($params['AppCategory'])) {
$exts = File::$app_categories[$params['AppCategory']];
$categorySQLs = array();
foreach($exts as $ext) $categorySQLs[] = '"File"."Name" LIKE \'%.' . $ext . '\'';
// TODO Use DataList->filterAny() once OR connectives are implemented properly
$list = $list->where('(' . implode(' OR ', $categorySQLs) . ')');
}

return $list;
}

public function getEditForm($id = null, $fields = null) {
$form = parent::getEditForm($id, $fields);
$folder = ($id && is_numeric($id)) ? DataObject::get_by_id('Folder', $id, false) : $this->currentPage();
$fields = $form->Fields();
$title = ($folder && $folder->exists()) ? $folder->Title : _t('AssetAdmin.FILES', 'Files');
$fields->push(new HiddenField('ID', false, $folder ? $folder->ID : null));

// File listing
$gridFieldConfig = GridFieldConfig::create()->addComponents(
new GridFieldToolbarHeader(),
new GridFieldFilterHeader(),
new GridFieldSortableHeader(),
new GridFieldDataColumns(),
new GridFieldPaginator(15),
new GridFieldEditButton(),
new GridFieldDeleteAction(),
new GridFieldDetailForm(),
GridFieldLevelup::create($folder->ID)->setLinkSpec('admin/assets/show/%d')
);

$gridField = new GridField('File', $title, $this->getList(), $gridFieldConfig);
$columns = $gridField->getConfig()->getComponentByType('GridFieldDataColumns');
$columns->setDisplayFields(array(
'StripThumbnail' => '',
// 'Parent.FileName' => 'Folder',
'Title' => _t('File.Name'),
'Created' => _t('AssetAdmin.CREATED', 'Date'),
'Size' => _t('AssetAdmin.SIZE', 'Size'),
));
$columns->setFieldCasting(array(
'Created' => 'Date->Nice'
));
$gridField->setAttribute(
'data-url-folder-template',
Controller::join_links($this->Link('show'), '%s')
);

if($folder->canCreate()) {
$uploadBtn = new LiteralField(
'UploadButton',
sprintf(
'<a class="ss-ui-button ss-ui-action-constructive cms-panel-link" data-pjax-target="Content" data-icon="drive-upload" href="%s">%s</a>',
Controller::join_links(singleton('CMSFileAddController')->Link(), '?ID=' . $folder->ID),
_t('Folder.UploadFilesButton', 'Upload')
)
);
} else {
$uploadBtn = null;
}

if(!$folder->hasMethod('canAddChildren') || ($folder->hasMethod('canAddChildren') && $folder->canAddChildren())) {
// TODO Will most likely be replaced by GridField logic
$addFolderBtn = new LiteralField(
'AddFolderButton',
sprintf(
'<a class="ss-ui-button ss-ui-action-constructive cms-add-folder-link" data-icon="add" data-url="%s" href="%s">%s</a>',
Controller::join_links($this->Link('AddForm'), '?' . http_build_query(array(
'action_doAdd' => 1,
'ParentID' => $folder->ID,
'SecurityID' => $form->getSecurityToken()->getValue()
))),
Controller::join_links($this->Link('addfolder'), '?ParentID=' . $folder->ID),
_t('Folder.AddFolderButton', 'Add folder')
)
);
} else {
$addFolderBtn = '';
}

if($folder->canEdit()) {
$syncButton = new LiteralField(
'SyncButton',
sprintf(
'<a class="ss-ui-button ss-ui-action ui-button-text-icon-primary ss-ui-button-ajax" data-icon="arrow-circle-double" title="%s" href="%s">%s</a>',
_t('AssetAdmin.FILESYSTEMSYNCTITLE', 'Update the CMS database entries of files on the filesystem. Useful when new files have been uploaded outside of the CMS, e.g. through FTP.'),
$this->Link('doSync'),
_t('AssetAdmin.FILESYSTEMSYNC','Sync files')
)
);
} else {
$syncButton = null;
}

// Move existing fields to a "details" tab, unless they've already been tabbed out through extensions.
// Required to keep Folder->getCMSFields() simple and reuseable,
// without any dependencies into AssetAdmin (e.g. useful for "add folder" views).
if(!$fields->hasTabset()) {
$tabs = new TabSet('Root',
$tabList = new Tab('ListView', _t('AssetAdmin.ListView', 'List View')),
$tabTree = new Tab('TreeView', _t('AssetAdmin.TreeView', 'Tree View'))
);
$tabList->addExtraClass("content-listview");
$tabTree->addExtraClass("content-treeview");
if($fields->Count() && $folder->exists()) {
$tabs->push($tabDetails = new Tab('DetailsView', _t('AssetAdmin.DetailsView', 'Details')));
$tabDetails->addExtraClass("content-galleryview");
foreach($fields as $field) {
$fields->removeByName($field->getName());
$tabDetails->push($field);
}
}
$fields->push($tabs);
}

// List view
$fields->addFieldsToTab('Root.ListView', array(
$actionsComposite = CompositeField::create(
CompositeField::create(
$uploadBtn,
$addFolderBtn,
$syncButton //TODO: add this into a batch actions menu as in https://github.com/silverstripe/silverstripe-design/raw/master/Design/ss3-ui_files-manager-list-view.jpg
)->addExtraClass('cms-actions-row')
)->addExtraClass('cms-content-toolbar field'),
$gridField
));

$treeField = new LiteralField('Tree', '');
// Tree view
$fields->addFieldsToTab('Root.TreeView', array(
clone $actionsComposite,
// TODO Replace with lazy loading on client to avoid performance hit of rendering potentially unused views
new LiteralField(
'Tree',
$treeField->createTag(
'div',
array(
'class' => 'cms-tree',
'data-url-tree' => $this->Link('getsubtree'),
'data-url-savetreenode' => $this->Link('savetreenode')
),
$this->SiteTreeAsUL()
)
)
));

// Move actions to "details" tab (they don't make sense on list/tree view)
$actions = $form->Actions();
$saveBtn = $actions->fieldByName('action_save');
$deleteBtn = $actions->fieldByName('action_delete');
if(($saveBtn || $deleteBtn) && $fields->fieldByName('Root.DetailsView')) {
$actions->removeByName('action_save');
$actions->removeByName('action_delete');
$fields->addFieldToTab(
'Root.DetailsView',
CompositeField::create($saveBtn,$deleteBtn)->addExtraClass('Actions')
);
}



$fields->setForm($form);
$form->setTemplate($this->getTemplatesWithSuffix('_EditForm'));
// TODO Can't merge $FormAttributes in template at the moment
$form->addExtraClass('cms-edit-form cms-panel-padded center ' . $this->BaseCSSClasses());
$form->setAttribute('data-pjax-fragment', 'CurrentForm');
$form->Fields()->findOrMakeTab('Root')->setTemplate('CMSTabSet');

$this->extend('updateEditForm', $form);

return $form;
}

public function addfolder($request) {
$obj = $this->customise(array(
'EditForm' => $this->AddForm()
));

if($request->isAjax()) {
// Rendering is handled by template, which will call EditForm() eventually
$content = $obj->renderWith($this->getTemplatesWithSuffix('_Content'));
} else {
$content = $obj->renderWith($this->getViewer('show'));
}

return $content;
}

public function delete($data, $form) {
$className = $this->stat('tree_class');

$record = DataObject::get_by_id($className, Convert::raw2sql($data['ID']));
if($record && !$record->canDelete()) return Security::permissionFailure();
if(!$record || !$record->ID) throw new HTTPResponse_Exception("Bad record ID #" . (int)$data['ID'], 404);
$parentID = $record->ParentID;
$record->delete();
$this->setCurrentPageID(null);

$this->response->addHeader('X-Status', rawurlencode(_t('LeftAndMain.DELETED', 'Deleted.')));
$this->response->addHeader('X-Pjax', 'Content');
return $this->redirect(Controller::join_links($this->Link('show'), $parentID ? $parentID : 0));
}

public function getSearchContext() {
$context = singleton('File')->getDefaultSearchContext();

// Namespace fields, for easier detection if a search is present
foreach($context->getFields() as $field) $field->setName(sprintf('q[%s]', $field->getName()));
foreach($context->getFilters() as $filter) $filter->setFullName(sprintf('q[%s]', $filter->getFullName()));

// Customize fields
$appCategories = array(
'image' => _t('AssetAdmin.AppCategoryImage', 'Image'),
'audio' => _t('AssetAdmin.AppCategoryAudio', 'Audio'),
'mov' => _t('AssetAdmin.AppCategoryVideo', 'Video'),
'flash' => _t('AssetAdmin.AppCategoryFlash', 'Flash', 'The fileformat'),
'zip' => _t('AssetAdmin.AppCategoryArchive', 'Archive', 'A collection of files'),
'doc' => _t('AssetAdmin.AppCategoryDocument', 'Document')
);
$context->addField(
$typeDropdown = new DropdownField(
'q[AppCategory]',
_t('AssetAdmin.Filetype', 'File type'),
$appCategories
)
);

$typeDropdown->setEmptyString(' ');

$context->addField(
new CheckboxField('q[CurrentFolderOnly]', _t('AssetAdmin.CurrentFolderOnly', 'Limit to current folder?'))
);
$context->getFields()->removeByName('q[Title]');

return $context;
}

/**
* Returns a form for filtering of files and assets gridfield.
* Result filtering takes place in {@link getList()}.
*
* @return Form
* @see AssetAdmin.js
*/
public function SearchForm() {
$folder = $this->currentPage();
$context = $this->getSearchContext();

$fields = $context->getSearchFields();
$actions = new FieldList(
FormAction::create('doSearch', _t('CMSMain_left.ss.APPLY FILTER', 'Apply Filter'))
->addExtraClass('ss-ui-action-constructive'),
Object::create('ResetFormAction', 'clear', _t('CMSMain_left.ss.RESET', 'Reset'))
);

$form = new Form($this, 'filter', $fields, $actions);
$form->setFormMethod('GET');
$form->setFormAction(Controller::join_links($this->Link('show'), $folder->ID));
$form->addExtraClass('cms-search-form');
$form->loadDataFrom($this->request->getVars());
$form->disableSecurityToken();
// This have to match data-name attribute on the gridfield so that the javascript selectors work
$form->setAttribute('data-gridfield', 'File');
return $form;
}

public function AddForm() {
$folder = singleton('Folder');
$form = new Form(
$this,
'AddForm',
new FieldList(
new TextField("Name", _t('File.Name')),
new HiddenField('ParentID', false, $this->request->getVar('ParentID'))
),
new FieldList(
FormAction::create('doAdd', _t('AssetAdmin_left.ss.GO','Go'))
->addExtraClass('ss-ui-action-constructive')->setAttribute('data-icon', 'accept')
->setTitle(_t('AssetAdmin.ActionAdd', 'Add folder'))
)
);
$form->setTemplate($this->getTemplatesWithSuffix('_EditForm'));
// TODO Can't merge $FormAttributes in template at the moment
$form->addExtraClass('add-form cms-add-form cms-edit-form cms-panel-padded center ' . $this->BaseCSSClasses());

return $form;
}

/**
* Add a new group and return its details suitable for ajax.
*
* @todo Move logic into Folder class, and use LeftAndMain->doAdd() default implementation.
*/
public function doAdd($data, $form) {
$class = $this->stat('tree_class');

// check create permissions
if(!singleton($class)->canCreate()) return Security::permissionFailure($this);

// check addchildren permissions
if(
singleton($class)->hasExtension('Hierarchy')
&& isset($data['ParentID'])
&& is_numeric($data['ParentID'])
&& $data['ParentID']
) {
$parentRecord = DataObject::get_by_id($class, $data['ParentID']);
if(
$parentRecord->hasMethod('canAddChildren')
&& !$parentRecord->canAddChildren()
) return Security::permissionFailure($this);
} else {
$parentRecord = null;
}

$parent = (isset($data['ParentID']) && is_numeric($data['ParentID'])) ? (int)$data['ParentID'] : 0;
$name = (isset($data['Name'])) ? basename($data['Name']) : _t('AssetAdmin.NEWFOLDER',"NewFolder");
if(!$parentRecord || !$parentRecord->ID) $parent = 0;

// Get the folder to be created
if($parentRecord && $parentRecord->ID) $filename = $parentRecord->FullPath . $name;
else $filename = ASSETS_PATH . '/' . $name;

// Actually create
if(!file_exists(ASSETS_PATH)) {
mkdir(ASSETS_PATH);
}

$record = new Folder();
$record->ParentID = $parent;
$record->Name = $record->Title = basename($filename);

// Ensure uniqueness
$i = 2;
$baseFilename = substr($record->Filename, 0, -1) . '-';
while(file_exists($record->FullPath)) {
$record->Filename = $baseFilename . $i . '/';
$i++;
}

$record->Name = $record->Title = basename($record->Filename);
$record->write();

mkdir($record->FullPath);
chmod($record->FullPath, Filesystem::$file_create_mask);

if($parentRecord) {
return $this->redirect(Controller::join_links($this->Link('show'), $parentRecord->ID));
} else {
return $this->redirect($this->Link());
}
}

/**
* Custom currentPage() method to handle opening the 'root' folder
*/
public function currentPage() {
$id = $this->currentPageID();
if($id && is_numeric($id) && $id > 0) {
$folder = DataObject::get_by_id('Folder', $id);
if($folder && $folder->exists()) {
return $folder;
}
}
return new Folder();
}

public function getSiteTreeFor($className, $rootID = null, $childrenMethod = null, $numChildrenMethod = null, $filterFunction = null, $minNodeCount = 30) {
if (!$childrenMethod) $childrenMethod = 'ChildFolders';
return parent::getSiteTreeFor($className, $rootID, $childrenMethod, $numChildrenMethod, $filterFunction, $minNodeCount);
}

public function getCMSTreeTitle() {
return Director::absoluteBaseURL() . "assets";
}

public function SiteTreeAsUL() {
return $this->getSiteTreeFor($this->stat('tree_class'), null, 'ChildFolders');
}

//------------------------------------------------------------------------------------------//

// Data saving handlers

/**
* Can be queried with an ajax request to trigger the filesystem sync. It returns a FormResponse status message
* to display in the CMS
*/
public function doSync() {
$message = Filesystem::sync();
$this->response->addHeader('X-Status', rawurlencode($message));

return;
}

/**
* #################################
* Garbage collection.
* #################################
*/

/**
* Removes all unused thumbnails from the file store
* and returns the status of the process to the user.
*/
public function deleteunusedthumbnails($request) {
// Protect against CSRF on destructive action
if(!SecurityToken::inst()->checkRequest($request)) return $this->httpError(400);

$count = 0;
$thumbnails = $this->getUnusedThumbnails();

if($thumbnails) {
foreach($thumbnails as $thumbnail) {
unlink(ASSETS_PATH . "/" . $thumbnail);
$count++;
}
}

$message = _t(
'AssetAdmin.THUMBSDELETED',
'{count} unused thumbnails have been deleted',
array('count' => $count)
);
$this->response->addHeader('X-Status', rawurlencode($message));
return;
}

/**
* Creates array containg all unused thumbnails.
*
* Array is created in three steps:
* 1. Scan assets folder and retrieve all thumbnails
* 2. Scan all HTMLField in system and retrieve thumbnails from them.
* 3. Count difference between two sets (array_diff)
*
* @return array
*/
private function getUnusedThumbnails() {
$allThumbnails = array();
$usedThumbnails = array();
$dirIterator = new RecursiveIteratorIterator(new RecursiveDirectoryIterator(ASSETS_PATH));
$classes = ClassInfo::subclassesFor('SiteTree');

if($dirIterator) {
foreach($dirIterator as $file) {
if($file->isFile()) {
if(strpos($file->getPathname(), '_resampled') !== false) {
$pathInfo = pathinfo($file->getPathname());
if(in_array(strtolower($pathInfo['extension']), array('jpeg', 'jpg', 'jpe', 'png', 'gif'))) {
$path = str_replace('\\','/', $file->getPathname());
$allThumbnails[] = substr($path, strpos($path, '/assets/') + 8);
}
}
}
}
}

if($classes) {
foreach($classes as $className) {
$SNG_class = singleton($className);
$objects = DataObject::get($className);

if($objects !== NULL) {
foreach($objects as $object) {
foreach($SNG_class->db() as $fieldName => $fieldType) {
if($fieldType == 'HTMLText') {
$url1 = HTTP::findByTagAndAttribute($object->$fieldName,array('img' => 'src'));

if($url1 != NULL) {
$usedThumbnails[] = substr($url1[0], strpos($url1[0], '/assets/') + 8);
}

if($object->latestPublished > 0) {
$object = Versioned::get_latest_version($className, $object->ID);
$url2 = HTTP::findByTagAndAttribute($object->$fieldName, array('img' => 'src'));

if($url2 != NULL) {
$usedThumbnails[] = substr($url2[0], strpos($url2[0], '/assets/') + 8);
}
}
}
}
}
}
}
}

return array_diff($allThumbnails, $usedThumbnails);
}

/**
* @return ArrayList
*/
public function Breadcrumbs($unlinked = false) {
$items = parent::Breadcrumbs($unlinked);

// The root element should explicitly point to the root node.
// Uses session state for current record otherwise.
$items[0]->Link = Controller::join_links(singleton('AssetAdmin')->Link('show'), 0);

// If a search is in progress, don't show the path
if($this->request->requestVar('q')) {
$items = $items->limit(1);
$items->push(new ArrayData(array(
'Title' => _t('LeftAndMain.SearchResults', 'Search Results'),
'Link' => Controller::join_links($this->Link(), '?' . http_build_query(array('q' => $this->request->requestVar('q'))))
)));
}

// If we're adding a folder, note that in breadcrumbs as well
if($this->request->param('Action') == 'addfolder') {
$items->push(new ArrayData(array(
'Title' => _t('Folder.AddFolderButton', 'Add folder'),
'Link' => false
)));
}

return $items;
}

public function providePermissions() {
$title = _t("AssetAdmin.MENUTITLE", LeftAndMain::menu_title_for_class($this->class));
return array(
"CMS_ACCESS_AssetAdmin" => array(
'name' => _t('CMSMain.ACCESS', "Access to '{title}' section", array('title' => $title)),
'category' => _t('Permission.CMS_ACCESS_CATEGORY', 'CMS Access')
)
);
}

}
/**
* Delete multiple {@link Folder} records (and the associated filesystem nodes).
* Usually used through the {@link AssetAdmin} interface.
*
* @package cms
* @subpackage batchactions
*/
class AssetAdmin_DeleteBatchAction extends CMSBatchAction {
public function getActionTitle() {
// _t('AssetAdmin_left.ss.SELECTTODEL','Select the folders that you want to delete and then click the button below')
return _t('AssetAdmin_DeleteBatchAction.TITLE', 'Delete folders');
}

public function run(SS_List $records) {
$status = array(
'modified'=>array(),
'deleted'=>array()
);

foreach($records as $record) {
$id = $record->ID;

// Perform the action
if($record->canDelete()) $record->delete();

$status['deleted'][$id] = array();

$record->destroy();
unset($record);
}

return Convert::raw2json($status);
}
}

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