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Файл: framework/admin/code/LeftAndMain.php
Строк: 2722
<?php

/**
 * @package framework
 * @subpackage admin
 */

/**
 * LeftAndMain is the parent class of all the two-pane views in the CMS.
 * If you are wanting to add more areas to the CMS, you can do it by subclassing LeftAndMain.
 *
 * This is essentially an abstract class which should be subclassed.
 * See {@link CMSMain} for a good example.
 */
class LeftAndMain extends Controller implements PermissionProvider {

    
/**
     * The 'base' url for CMS administration areas.
     * Note that if this is changed, many javascript
     * behaviours need to be updated with the correct url
     *
     * @config
     * @var string $url_base
     */
    
private static $url_base "admin";

    
/**
     * The current url segment attached to the LeftAndMain instance
     *
     * @config
     * @var string
     */
    
private static $url_segment;

    
/**
     * @config
     * @var string
     */
    
private static $url_rule '/$Action/$ID/$OtherID';

    
/**
     * @config
     * @var string
     */
    
private static $menu_title;

    
/**
     * @config
     * @var string
     */
    
private static $menu_icon;

    
/**
     * @config
     * @var int
     */
    
private static $menu_priority 0;

    
/**
     * @config
     * @var int
     */
    
private static $url_priority 50;

    
/**
     * A subclass of {@link DataObject}.
     *
     * Determines what is managed in this interface, through
     * {@link getEditForm()} and other logic.
     *
     * @config
     * @var string
     */
    
private static $tree_class null;

    
/**
     * The url used for the link in the Help tab in the backend
     *
     * @config
     * @var string
     */
    
private static $help_link '//userhelp.silverstripe.org/framework/en/3.2';

    
/**
     * @var array
     */
    
private static $allowed_actions = array(
        
'index',
        
'save',
        
'savetreenode',
        
'getsubtree',
        
'updatetreenodes',
        
'printable',
        
'show',
        
'EditorToolbar',
        
'EditForm',
        
'AddForm',
        
'batchactions',
        
'BatchActionsForm',
    );

    
/**
     * @config
     * @var Array Codes which are required from the current user to view this controller.
     * If multiple codes are provided, all of them are required.
     * All CMS controllers require "CMS_ACCESS_LeftAndMain" as a baseline check,
     * and fall back to "CMS_ACCESS_<class>" if no permissions are defined here.
     * See {@link canView()} for more details on permission checks.
     */
    
private static $required_permission_codes;

    
/**
     * @config
     * @var String Namespace for session info, e.g. current record.
     * Defaults to the current class name, but can be amended to share a namespace in case
     * controllers are logically bundled together, and mainly separated
     * to achieve more flexible templating.
     */
    
private static $session_namespace;

    
/**
     * Register additional requirements through the {@link Requirements} class.
     * Used mainly to work around the missing "lazy loading" functionality
     * for getting css/javascript required after an ajax-call (e.g. loading the editform).
     *
     * YAML configuration example:
     * <code>
     * LeftAndMain:
     *   extra_requirements_javascript:
     *     mysite/javascript/myscript.js:
     * </code>
     *
     * @config
     * @var array
     */
    
private static $extra_requirements_javascript = array();

    
/**
     * YAML configuration example:
     * <code>
     * LeftAndMain:
     *   extra_requirements_css:
     *     mysite/css/mystyle.css:
     *       media: screen
     * </code>
     *
     * @config
     * @var array See {@link extra_requirements_javascript}
     */
    
private static $extra_requirements_css = array();

    
/**
     * @config
     * @var array See {@link extra_requirements_javascript}
     */
    
private static $extra_requirements_themedCss = array();

    
/**
     * If true, call a keepalive ping every 5 minutes from the CMS interface,
     * to ensure that the session never dies.
     *
     * @config
     * @var boolean
     */
    
private static $session_keepalive_ping true;

    
/**
     * @var PjaxResponseNegotiator
     */
    
protected $responseNegotiator;

    
/**
     * @param Member $member
     * @return boolean
     */
    
public function canView($member null) {
        if(!
$member && $member !== FALSE$member Member::currentUser();

        
// cms menus only for logged-in members
        
if(!$member) return false;

        
// alternative extended checks
        
if($this->hasMethod('alternateAccessCheck')) {
            
$alternateAllowed $this->alternateAccessCheck();
            if(
$alternateAllowed === FALSE) return false;
        }

        
// Check for "CMS admin" permission
        
if(Permission::checkMember($member"CMS_ACCESS_LeftAndMain")) return true;

        
// Check for LeftAndMain sub-class permissions
        
$codes = array();
        
$extraCodes $this->stat('required_permission_codes');
        if(
$extraCodes !== false) { // allow explicit FALSE to disable subclass check
            
if($extraCodes$codes array_merge($codes, (array)$extraCodes);
            else 
$codes[] = "CMS_ACCESS_$this->class";
        }
        foreach(
$codes as $code) if(!Permission::checkMember($member$code)) return false;

        return 
true;
    }

    
/**
     * @uses LeftAndMainExtension->init()
     * @uses LeftAndMainExtension->accessedCMS()
     * @uses CMSMenu
     */
    
public function init() {
        
parent::init();

        
Config::inst()->update('SSViewer''rewrite_hash_links'false);
        
Config::inst()->update('ContentNegotiator''enabled'false);

        
// set language
        
$member Member::currentUser();
        if(!empty(
$member->Locale)) i18n::set_locale($member->Locale);
        if(!empty(
$member->DateFormat)) i18n::config()->date_format $member->DateFormat;
        if(!empty(
$member->TimeFormat)) i18n::config()->time_format $member->TimeFormat;

        
// can't be done in cms/_config.php as locale is not set yet
        
CMSMenu::add_link(
            
'Help',
            
_t('LeftAndMain.HELP''Help''Menu title'),
            
$this->config()->help_link,
            -
2,
            array(
                
'target' => '_blank'
            
)
        );

        
// Allow customisation of the access check by a extension
        // Also all the canView() check to execute Controller::redirect()
        
if(!$this->canView() && !$this->getResponse()->isFinished()) {
            
// When access /admin/, we should try a redirect to another part of the admin rather than be locked out
            
$menu $this->MainMenu();
            foreach(
$menu as $candidate) {
                if(
                    
$candidate->Link &&
                    
$candidate->Link != $this->Link()
                    && 
$candidate->MenuItem->controller
                    
&& singleton($candidate->MenuItem->controller)->canView()
                ) {
                    return 
$this->redirect($candidate->Link);
                }
            }

            if(
Member::currentUser()) {
                
Session::set("BackURL"null);
            }

            
// if no alternate menu items have matched, return a permission error
            
$messageSet = array(
                
'default' => _t(
                    
'LeftAndMain.PERMDEFAULT',
                    
"You must be logged in to access the administration area; please enter your credentials below."
                
),
                
'alreadyLoggedIn' => _t(
                    
'LeftAndMain.PERMALREADY',
                    
"I'm sorry, but you can't access that part of the CMS.  If you want to log in as someone else, do"
                    
" so below."
                
),
                
'logInAgain' => _t(
                    
'LeftAndMain.PERMAGAIN',
                    
"You have been logged out of the CMS.  If you would like to log in again, enter a username and"
                    
" password below."
                
),
            );

            return 
Security::permissionFailure($this$messageSet);
        }

        
// Don't continue if there's already been a redirection request.
        
if($this->redirectedTo()) return;

        
// Audit logging hook
        
if(empty($_REQUEST['executeForm']) && !$this->getRequest()->isAjax()) $this->extend('accessedCMS');

        
// Set the members html editor config
        
if(Member::currentUser()) {
            
HtmlEditorConfig::set_active(Member::currentUser()->getHtmlEditorConfigForCMS());
        }

        
// Set default values in the config if missing.  These things can't be defined in the config
        // file because insufficient information exists when that is being processed
        
$htmlEditorConfig HtmlEditorConfig::get_active();
        
$htmlEditorConfig->setOption('language'i18n::get_tinymce_lang());
        if(!
$htmlEditorConfig->getOption('content_css')) {
            
$cssFiles = array();
            
$cssFiles[] = FRAMEWORK_ADMIN_DIR '/css/editor.css';

            
// Use theme from the site config
            
if(class_exists('SiteConfig') && ($config SiteConfig::current_site_config()) && $config->Theme) {
                
$theme $config->Theme;
            } elseif(
Config::inst()->get('SSViewer''theme_enabled') && Config::inst()->get('SSViewer''theme')) {
                
$theme Config::inst()->get('SSViewer''theme');
            } else {
                
$theme false;
            }

            if(
$theme$cssFiles[] = THEMES_DIR "/{$theme}/css/editor.css";
            else if(
project()) $cssFiles[] = project() . '/css/editor.css';

            
// Remove files that don't exist
            
foreach($cssFiles as $k => $cssFile) {
                if(!
file_exists(BASE_PATH '/' $cssFile)) unset($cssFiles[$k]);
            }

            
$htmlEditorConfig->setOption('content_css'implode(','$cssFiles));
        }

        
// Using uncompressed files as they'll be processed by JSMin in the Requirements class.
        // Not as effective as other compressors or pre-compressed+finetuned files,
        // but overall the unified minification into a single file brings more performance benefits
        // than a couple of saved bytes (after gzip) in individual files.
        // We also re-compress already compressed files through JSMin as this causes weird runtime bugs.
        
Requirements::combine_files(
            
'lib.js',
            array(
                
THIRDPARTY_DIR '/jquery/jquery.js',
                
FRAMEWORK_DIR '/javascript/jquery-ondemand/jquery.ondemand.js',
                
FRAMEWORK_ADMIN_DIR '/javascript/lib.js',
                
THIRDPARTY_DIR '/jquery-ui/jquery-ui.js',
                
THIRDPARTY_DIR '/json-js/json2.js',
                
THIRDPARTY_DIR '/jquery-entwine/dist/jquery.entwine-dist.js',
                
THIRDPARTY_DIR '/jquery-cookie/jquery.cookie.js',
                
THIRDPARTY_DIR '/jquery-query/jquery.query.js',
                
THIRDPARTY_DIR '/jquery-form/jquery.form.js',
                
FRAMEWORK_ADMIN_DIR '/thirdparty/jquery-notice/jquery.notice.js',
                
FRAMEWORK_ADMIN_DIR '/thirdparty/jsizes/lib/jquery.sizes.js',
                
FRAMEWORK_ADMIN_DIR '/thirdparty/jlayout/lib/jlayout.border.js',
                
FRAMEWORK_ADMIN_DIR '/thirdparty/jlayout/lib/jquery.jlayout.js',
                
FRAMEWORK_ADMIN_DIR '/thirdparty/history-js/scripts/uncompressed/history.js',
                
FRAMEWORK_ADMIN_DIR '/thirdparty/history-js/scripts/uncompressed/history.adapter.jquery.js',
                
FRAMEWORK_ADMIN_DIR '/thirdparty/history-js/scripts/uncompressed/history.html4.js',
                
THIRDPARTY_DIR '/jstree/jquery.jstree.js',
                
FRAMEWORK_ADMIN_DIR '/thirdparty/chosen/chosen/chosen.jquery.js',
                
FRAMEWORK_ADMIN_DIR '/thirdparty/jquery-hoverIntent/jquery.hoverIntent.js',
                
FRAMEWORK_ADMIN_DIR '/javascript/jquery-changetracker/lib/jquery.changetracker.js',
                
FRAMEWORK_DIR '/javascript/i18n.js',
                
FRAMEWORK_DIR '/javascript/TreeDropdownField.js',
                
FRAMEWORK_DIR '/javascript/DateField.js',
                
FRAMEWORK_DIR '/javascript/HtmlEditorField.js',
                
FRAMEWORK_DIR '/javascript/TabSet.js',
                
FRAMEWORK_ADMIN_DIR '/javascript/ssui.core.js',
                
FRAMEWORK_DIR '/javascript/GridField.js',
            )
        );

        if (
Director::isDev()) Requirements::javascript(FRAMEWORK_ADMIN_DIR '/javascript/leaktools.js');

        
$leftAndMainIncludes array_unique(array_merge(
            array(
                
FRAMEWORK_ADMIN_DIR '/javascript/LeftAndMain.Layout.js',
                
FRAMEWORK_ADMIN_DIR '/javascript/LeftAndMain.js',
                
FRAMEWORK_ADMIN_DIR '/javascript/LeftAndMain.ActionTabSet.js',
                
FRAMEWORK_ADMIN_DIR '/javascript/LeftAndMain.Panel.js',
                
FRAMEWORK_ADMIN_DIR '/javascript/LeftAndMain.Tree.js',
                
FRAMEWORK_ADMIN_DIR '/javascript/LeftAndMain.Content.js',
                
FRAMEWORK_ADMIN_DIR '/javascript/LeftAndMain.EditForm.js',
                
FRAMEWORK_ADMIN_DIR '/javascript/LeftAndMain.Menu.js',
                
FRAMEWORK_ADMIN_DIR '/javascript/LeftAndMain.Preview.js',
                
FRAMEWORK_ADMIN_DIR '/javascript/LeftAndMain.BatchActions.js',
                
FRAMEWORK_ADMIN_DIR '/javascript/LeftAndMain.FieldHelp.js',
                
FRAMEWORK_ADMIN_DIR '/javascript/LeftAndMain.FieldDescriptionToggle.js',
                
FRAMEWORK_ADMIN_DIR '/javascript/LeftAndMain.TreeDropdownField.js',
            ),
            
Requirements::add_i18n_javascript(FRAMEWORK_DIR '/javascript/lang'truetrue),
            
Requirements::add_i18n_javascript(FRAMEWORK_ADMIN_DIR '/javascript/lang'truetrue)
        ));

        if(
$this->config()->session_keepalive_ping) {
            
$leftAndMainIncludes[] = FRAMEWORK_ADMIN_DIR '/javascript/LeftAndMain.Ping.js';
        }

        
Requirements::combine_files('leftandmain.js'$leftAndMainIncludes);

        
// TODO Confuses jQuery.ondemand through document.write()
        
if (Director::isDev()) {
            
Requirements::javascript(THIRDPARTY_DIR '/jquery-entwine/src/jquery.entwine.inspector.js');
        }

        
Requirements::css(FRAMEWORK_ADMIN_DIR '/thirdparty/jquery-notice/jquery.notice.css');
        
Requirements::css(THIRDPARTY_DIR '/jquery-ui-themes/smoothness/jquery-ui.css');
        
Requirements::css(FRAMEWORK_ADMIN_DIR .'/thirdparty/chosen/chosen/chosen.css');
        
Requirements::css(THIRDPARTY_DIR '/jstree/themes/apple/style.css');
        
Requirements::css(FRAMEWORK_DIR '/css/TreeDropdownField.css');
        
Requirements::css(FRAMEWORK_ADMIN_DIR '/css/screen.css');
        
Requirements::css(FRAMEWORK_DIR '/css/GridField.css');

        
// Browser-specific requirements
        
$ie = isset($_SERVER['HTTP_USER_AGENT']) ? strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') : false;
        if(
$ie) {
            
$version substr($_SERVER['HTTP_USER_AGENT'], $ie 53);

            if(
$version == 7) {
                
Requirements::css(FRAMEWORK_ADMIN_DIR '/css/ie7.css');
            } else if(
$version == 8) {
                
Requirements::css(FRAMEWORK_ADMIN_DIR '/css/ie8.css');
            }
        }

        
// Custom requirements
        
$extraJs $this->stat('extra_requirements_javascript');

        if(
$extraJs) {
            foreach(
$extraJs as $file => $config) {
                if(
is_numeric($file)) {
                    
$file $config;
                }

                
Requirements::javascript($file);
            }
        }

        
$extraCss $this->stat('extra_requirements_css');

        if(
$extraCss) {
            foreach(
$extraCss as $file => $config) {
                if(
is_numeric($file)) {
                    
$file $config;
                    
$config = array();
                }

                
Requirements::css($file, isset($config['media']) ? $config['media'] : null);
            }
        }

        
$extraThemedCss $this->stat('extra_requirements_themedCss');

        if(
$extraThemedCss) {
            foreach (
$extraThemedCss as $file => $config) {
                if(
is_numeric($file)) {
                    
$file $config;
                    
$config = array();
                }

                
Requirements::themedCSS($file, isset($config['media']) ? $config['media'] : null);
            }
        }

        
$dummy null;
        
$this->extend('init'$dummy);

        
// The user's theme shouldn't affect the CMS, if, for example, they have
        // replaced TableListField.ss or Form.ss.
        
Config::inst()->update('SSViewer''theme_enabled'false);
    }

    public function 
handleRequest(SS_HTTPRequest $requestDataModel $model null) {
        try {
            
$response parent::handleRequest($request$model);
        } catch(
ValidationException $e) {
            
// Nicer presentation of model-level validation errors
            
$msgs _t('LeftAndMain.ValidationError''Validation error') . ': '
                
$e->getMessage();
            
$e = new SS_HTTPResponse_Exception($msgs403);
            
$errorResponse $e->getResponse();
            
$errorResponse->addHeader('Content-Type''text/plain');
            
$errorResponse->addHeader('X-Status'rawurlencode($msgs));
            
$e->setResponse($errorResponse);
            throw 
$e;
        }

        
$title $this->Title();
        if(!
$response->getHeader('X-Controller')) $response->addHeader('X-Controller'$this->class);
        if(!
$response->getHeader('X-Title')) $response->addHeader('X-Title'urlencode($title));

        
// Prevent clickjacking, see https://developer.mozilla.org/en-US/docs/HTTP/X-Frame-Options
        
$originalResponse $this->getResponse();
        
$originalResponse->addHeader('X-Frame-Options''SAMEORIGIN');
        
$originalResponse->addHeader('Vary''X-Requested-With');

        return 
$response;
    }

    
/**
     * Overloaded redirection logic to trigger a fake redirect on ajax requests.
     * While this violates HTTP principles, its the only way to work around the
     * fact that browsers handle HTTP redirects opaquely, no intervention via JS is possible.
     * In isolation, that's not a problem - but combined with history.pushState()
     * it means we would request the same redirection URL twice if we want to update the URL as well.
     * See LeftAndMain.js for the required jQuery ajaxComplete handlers.
     */
    
public function redirect($url$code=302) {
        if(
$this->getRequest()->isAjax()) {
            
$response $this->getResponse();
            
$response->addHeader('X-ControllerURL'$url);
            if(
$this->getRequest()->getHeader('X-Pjax') && !$response->getHeader('X-Pjax')) {
                
$response->addHeader('X-Pjax'$this->getRequest()->getHeader('X-Pjax'));
            }
            
$newResponse = new LeftAndMain_HTTPResponse(
                
$response->getBody(),
                
$response->getStatusCode(),
                
$response->getStatusDescription()
            );
            foreach(
$response->getHeaders() as $k => $v) {
                
$newResponse->addHeader($k$v);
            }
            
$newResponse->setIsFinished(true);
            
$this->setResponse($newResponse);
            return 
''// Actual response will be re-requested by client
        
} else {
            
parent::redirect($url$code);
        }
    }

    public function 
index($request) {
        return 
$this->getResponseNegotiator()->respond($request);
    }

    
/**
     * If this is set to true, the "switchView" context in the
     * template is shown, with links to the staging and publish site.
     *
     * @return boolean
     */
    
public function ShowSwitchView() {
        return 
false;
    }


    
//------------------------------------------------------------------------------------------//
    // Main controllers

    /**
     * You should implement a Link() function in your subclass of LeftAndMain,
     * to point to the URL of that particular controller.
     *
     * @return string
     */
    
public function Link($action null) {
        
// Handle missing url_segments
        
if($this->config()->url_segment) {
            
$segment $this->config()->get('url_segment'Config::FIRST_SET);
        } else {
            
$segment $this->class;
        };

        
$link Controller::join_links(
            
$this->stat('url_base'true),
            
$segment,
            
'/'// trailing slash needed if $action is null!
            
"$action"
        
);
        
$this->extend('updateLink'$link);
        return 
$link;
    }

    
/**
     * Returns the menu title for the given LeftAndMain subclass.
     * Implemented static so that we can get this value without instantiating an object.
     * Menu title is *not* internationalised.
     */
    
public static function menu_title_for_class($class) {
        
$title Config::inst()->get($class'menu_title'Config::FIRST_SET);
        if(!
$title$title preg_replace('/Admin$/'''$class);
        return 
$title;
    }

    
/**
     * Return styling for the menu icon, if a custom icon is set for this class
     *
     * Example: static $menu-icon = '/path/to/image/';
     * @param string $class
     * @return string
     */
    
public static function menu_icon_for_class($class) {
        
$icon Config::inst()->get($class'menu_icon'Config::FIRST_SET);
        if (!empty(
$icon)) {
            
$class strtolower(Convert::raw2htmlname(str_replace('\', '-', $class)));
            return ".icon.icon-16.icon-{$class} { background-image: url('
{$icon}'); } ";
        }
        return '';
    }

    public function show($request) {
        // TODO Necessary for TableListField URLs to work properly
        if($request->param('
ID')) $this->setCurrentPageID($request->param('ID'));
        return $this->getResponseNegotiator()->respond($request);
    }

    /**
     * Caution: Volatile API.
     *
     * @return PjaxResponseNegotiator
     */
    public function getResponseNegotiator() {
        if(!$this->responseNegotiator) {
            $controller = $this;
            $this->responseNegotiator = new PjaxResponseNegotiator(
                array(
                    '
CurrentForm' => function() use(&$controller) {
                        return $controller->getEditForm()->forTemplate();
                    },
                    '
Content' => function() use(&$controller) {
                        return $controller->renderWith($controller->getTemplatesWithSuffix('
_Content'));
                    },
                    '
Breadcrumbs' => function() use (&$controller) {
                        return $controller->renderWith('
CMSBreadcrumbs');
                    },
                    '
default' => function() use(&$controller) {
                        return $controller->renderWith($controller->getViewer('
show'));
                    }
                ),
                $this->getResponse()
            );
        }
        return $this->responseNegotiator;
    }

    //------------------------------------------------------------------------------------------//
    // Main UI components

    /**
     * Returns the main menu of the CMS.  This is also used by init()
     * to work out which sections the user has access to.
     *
     * @param Boolean
     * @return SS_List
     */
    public function MainMenu($cached = true) {
        if(!isset($this->_cache_MainMenu) || !$cached) {
            // Don'
t accidentally return a menu if you're not logged in - it's used to determine access.
            if(!
Member::currentUser()) return new ArrayList();

            
// Encode into DO set
            
$menu = new ArrayList();
            
$menuItems CMSMenu::get_viewable_menu_items();

            
// extra styling for custom menu-icons
            
$menuIconStyling '';

            if(
$menuItems) {
                foreach(
$menuItems as $code => $menuItem) {
                    
// alternate permission checks (in addition to LeftAndMain->canView())

                    
if(
                        isset(
$menuItem->controller)
                        && 
$this->hasMethod('alternateMenuDisplayCheck')
                        && !
$this->alternateMenuDisplayCheck($menuItem->controller)
                    ) {
                        continue;
                    }

                    
$linkingmode "link";

                    if(
$menuItem->controller && get_class($this) == $menuItem->controller) {
                        
$linkingmode "current";
                    } else if(
strpos($this->Link(), $menuItem->url) !== false) {
                        if(
$this->Link() == $menuItem->url) {
                            
$linkingmode "current";

                        
// default menu is the one with a blank {@link url_segment}
                        
} else if(singleton($menuItem->controller)->stat('url_segment') == '') {
                            if(
$this->Link() == $this->stat('url_base').'/') {
                                
$linkingmode "current";
                            }

                        } else {
                            
$linkingmode "current";
                        }
                    }

                    
// already set in CMSMenu::populate_menu(), but from a static pre-controller
                    // context, so doesn't respect the current user locale in _t() calls - as a workaround,
                    // we simply call LeftAndMain::menu_title_for_class() again
                    // if we're dealing with a controller
                    
if($menuItem->controller) {
                        
$defaultTitle LeftAndMain::menu_title_for_class($menuItem->controller);
                        
$title _t("{$menuItem->controller}.MENUTITLE"$defaultTitle);
                    } else {
                        
$title $menuItem->title;
                    }

                    
// Provide styling for custom $menu-icon. Done here instead of in
                    // CMSMenu::populate_menu(), because the icon is part of
                    // the CMS right pane for the specified class as well...
                    
if($menuItem->controller) {
                        
$menuIcon LeftAndMain::menu_icon_for_class($menuItem->controller);
                        if (!empty(
$menuIcon)) $menuIconStyling .= $menuIcon;
                    }

                    
$menu->push(new ArrayData(array(
                        
"MenuItem" => $menuItem,
                        
"AttributesHTML" => $menuItem->getAttributesHTML(),
                        
"Title" => Convert::raw2xml($title),
                        
"Code" => DBField::create_field('Text'$code),
                        
"Link" => $menuItem->url,
                        
"LinkingMode" => $linkingmode
                    
)));
                }
            }
            if (
$menuIconStylingRequirements::customCSS($menuIconStyling);

            
$this->_cache_MainMenu $menu;
        }

        return 
$this->_cache_MainMenu;
    }

    public function 
Menu() {
        return 
$this->renderWith($this->getTemplatesWithSuffix('_Menu'));
    }

    
/**
     * @todo Wrap in CMSMenu instance accessor
     * @return ArrayData A single menu entry (see {@link MainMenu})
     */
    
public function MenuCurrentItem() {
        
$items $this->MainMenu();
        return 
$items->find('LinkingMode''current');
    }

    
/**
     * Return a list of appropriate templates for this class, with the given suffix using
     * {@link SSViewer::get_templates_by_class()}
     *
     * @return array
     */
    
public function getTemplatesWithSuffix($suffix) {
        return 
SSViewer::get_templates_by_class(get_class($this), $suffix'LeftAndMain');
    }

    public function 
Content() {
        return 
$this->renderWith($this->getTemplatesWithSuffix('_Content'));
    }

    public function 
getRecord($id) {
        
$className $this->stat('tree_class');
        if(
$className && $id instanceof $className) {
            return 
$id;
        } else if(
$className && $id == 'root') {
            return 
singleton($className);
        } else if(
$className && is_numeric($id)) {
            return 
DataObject::get_by_id($className$id);
        } else {
            return 
false;
        }
    }

    
/**
     * @return ArrayList
     */
    
public function Breadcrumbs($unlinked false) {
        
$defaultTitle LeftAndMain::menu_title_for_class($this->class);
        
$title _t("{$this->class}.MENUTITLE"$defaultTitle);
        
$items = new ArrayList(array(
            new 
ArrayData(array(
                
'Title' => $title,
                
'Link' => ($unlinked) ? false $this->Link()
            ))
        ));
        
$record $this->currentPage();
        if(
$record && $record->exists()) {
            if(
$record->hasExtension('Hierarchy')) {
                
$ancestors $record->getAncestors();
                
$ancestors = new ArrayList(array_reverse($ancestors->toArray()));
                
$ancestors->push($record);
                foreach(
$ancestors as $ancestor) {
                    
$items->push(new ArrayData(array(
                        
'Title' => ($ancestor->MenuTitle) ? $ancestor->MenuTitle $ancestor->Title,
                        
'Link' => ($unlinked) ? false Controller::join_links($this->Link('show'), $ancestor->ID)
                    )));
                }
            } else {
                
$items->push(new ArrayData(array(
                    
'Title' => ($record->MenuTitle) ? $record->MenuTitle $record->Title,
                    
'Link' => ($unlinked) ? false Controller::join_links($this->Link('show'), $record->ID)
                )));
            }
        }

        return 
$items;
    }

    
/**
     * @return String HTML
     */
    
public function SiteTreeAsUL() {
        
$html $this->getSiteTreeFor($this->stat('tree_class'));
        
$this->extend('updateSiteTreeAsUL'$html);
        return 
$html;
    }

    
/**
     * Gets the current search filter for this request, if available
     *
     * @throws InvalidArgumentException
     * @return LeftAndMain_SearchFilter
     */
    
protected function getSearchFilter() {
        
// Check for given FilterClass
        
$params $this->getRequest()->getVar('q');
        if(empty(
$params['FilterClass'])) {
            return 
null;
        }

        
// Validate classname
        
$filterClass $params['FilterClass'];
        
$filterInfo = new ReflectionClass($filterClass);
        if(!
$filterInfo->implementsInterface('LeftAndMain_SearchFilter')) {
            throw new 
InvalidArgumentException(sprintf('Invalid filter class passed: %s'$filterClass));
        }

        return 
Injector::inst()->createWithArgs($filterClass, array($params));
    }

    
/**
     * Get a site tree HTML listing which displays the nodes under the given criteria.
     *
     * @param $className The class of the root object
     * @param $rootID The ID of the root object.  If this is null then a complete tree will be
     *  shown
     * @param $childrenMethod The method to call to get the children of the tree. For example,
     *  Children, AllChildrenIncludingDeleted, or AllHistoricalChildren
     * @return String Nested unordered list with links to each page
     */
    
public function getSiteTreeFor($className$rootID null$childrenMethod null$numChildrenMethod null,
            
$filterFunction null$nodeCountThreshold 30) {

        
// Filter criteria
        
$filter $this->getSearchFilter();

        
// Default childrenMethod and numChildrenMethod
        
if(!$childrenMethod$childrenMethod = ($filter && $filter->getChildrenMethod())
            ? 
$filter->getChildrenMethod()
            : 
'AllChildrenIncludingDeleted';

        if(!
$numChildrenMethod) {
            
$numChildrenMethod 'numChildren';
            if(
$filter && $filter->getNumChildrenMethod()) {
                
$numChildrenMethod $filter->getNumChildrenMethod();
            }
        }
        if(!
$filterFunction && $filter) {
            
$filterFunction = function($node) use($filter) {
                return 
$filter->isPageIncluded($node);
            };
        }

        
// Get the tree root
        
$record = ($rootID) ? $this->getRecord($rootID) : null;
        
$obj $record $record singleton($className);

        
// Get the current page
        // NOTE: This *must* be fetched before markPartialTree() is called, as this
        // causes the Hierarchy::$marked cache to be flushed (@see CMSMain::getRecord)
        // which means that deleted pages stored in the marked tree would be removed
        
$currentPage $this->currentPage();

        
// Mark the nodes of the tree to return
        
if ($filterFunction$obj->setMarkingFilterFunction($filterFunction);

        
$obj->markPartialTree($nodeCountThreshold$this$childrenMethod$numChildrenMethod);

        
// Ensure current page is exposed
        
if($currentPage$obj->markToExpose($currentPage);

        
// NOTE: SiteTree/CMSMain coupling :-(
        
if(class_exists('SiteTree')) {
            
SiteTree::prepopulate_permission_cache('CanEditType'$obj->markedNodeIDs(),
                
'SiteTree::can_edit_multiple');
        }

        
// getChildrenAsUL is a flexible and complex way of traversing the tree
        
$controller $this;
        
$recordController = ($this->stat('tree_class') == 'SiteTree') ?  singleton('CMSPageEditController') : $this;
        
$titleFn = function(&$child$numChildrenMethod) use(&$controller, &$recordController$filter) {
            
$link Controller::join_links($recordController->Link("show"), $child->ID);
            
$node LeftAndMain_TreeNode::create($child$link$controller->isCurrentPage($child), $numChildrenMethod$filter);
            return 
$node->forTemplate();
        };

        
// Limit the amount of nodes shown for performance reasons.
        // Skip the check if we're filtering the tree, since its not clear how many children will
        // match the filter criteria until they're queried (and matched up with previously marked nodes).
        
$nodeThresholdLeaf Config::inst()->get('Hierarchy''node_threshold_leaf');
        if(
$nodeThresholdLeaf && !$filterFunction) {
            
$nodeCountCallback = function($parent$numChildren) use(&$controller$className$nodeThresholdLeaf) {
                if(
$className == 'SiteTree' && $parent->ID && $numChildren $nodeThresholdLeaf) {
                    return 
sprintf(
                        
'<ul><li class="readonly"><span class="item">'
                            
'%s (<a href="%s" class="cms-panel-link" data-pjax-target="Content">%s</a>)'
                            
'</span></li></ul>',
                        
_t('LeftAndMain.TooManyPages''Too many pages'),
                        
Controller::join_links(
                            
$controller->LinkWithSearch($controller->Link()), '
                            ?view=list&ParentID=' 
$parent->ID
                        
),
                        
_t(
                            
'LeftAndMain.ShowAsList',
                            
'show as list',
                            
'Show large amount of pages in list instead of tree view'
                        
)
                    );
                }
            };
        } else {
            
$nodeCountCallback null;
        }

        
// If the amount of pages exceeds the node thresholds set, use the callback
        
$html null;
        if(
$obj->ParentID && $nodeCountCallback) {
            
$html $nodeCountCallback($obj$obj->$numChildrenMethod());
        }

        
// Otherwise return the actual tree (which might still filter leaf thresholds on children)
        
if(!$html) {
            
$html $obj->getChildrenAsUL(
                
"",
                
$titleFn,
                
singleton('CMSPagesController'),
                
true,
                
$childrenMethod,
                
$numChildrenMethod,
                
$nodeCountThreshold,
                
$nodeCountCallback
            
);
        }

        
// Wrap the root if needs be.
        
if(!$rootID) {
            
$rootLink $this->Link('show') . '/root';

            
// This lets us override the tree title with an extension
            
if($this->hasMethod('getCMSTreeTitle') && $customTreeTitle $this->getCMSTreeTitle()) {
                
$treeTitle $customTreeTitle;
            } elseif(
class_exists('SiteConfig')) {
                
$siteConfig SiteConfig::current_site_config();
                
$treeTitle =  Convert::raw2xml($siteConfig->Title);
            } else {
                
$treeTitle '...';
            }

            
$html "<ul><li id="record-0" data-id="0" class="Root nodelete"><strong>$treeTitle</strong>"
                
$html "</li></ul>";
        }

        return 
$html;
    }

    
/**
     * Get a subtree underneath the request param 'ID'.
     * If ID = 0, then get the whole tree.
     */
    
public function getsubtree($request) {
        
$html $this->getSiteTreeFor(
            
$this->stat('tree_class'),
            
$request->getVar('ID'),
            
null,
            
null,
            
null,
            
$request->getVar('minNodeCount')
        );

        
// Trim off the outer tag
        
$html preg_replace('/^[strn]*<ul[^>]*>/',''$html);
        
$html preg_replace('/</ul[^>]*>[strn]*$/',''$html);

        return 
$html;
    }

    
/**
     * Allows requesting a view update on specific tree nodes.
     * Similar to {@link getsubtree()}, but doesn't enforce loading
     * all children with the node. Useful to refresh views after
     * state modifications, e.g. saving a form.
     *
     * @return String JSON
     */
    
public function updatetreenodes($request) {
        
$data = array();
        
$ids explode(','$request->getVar('ids'));
        foreach(
$ids as $id) {
            if(
$id === "") continue; // $id may be a blank string, which is invalid and should be skipped over

            
$record $this->getRecord($id);
            if(!
$record) continue; // In case a page is no longer available
            
$recordController = ($this->stat('tree_class') == 'SiteTree')
                ?  
singleton('CMSPageEditController')
                : 
$this;

            
// Find the next & previous nodes, for proper positioning (Sort isn't good enough - it's not a raw offset)
            // TODO: These methods should really be in hierarchy - for a start it assumes Sort exists
            
$next $prev null;

            
$className $this->stat('tree_class');
            
$next DataObject::get($className)
                ->
filter('ParentID'$record->ParentID)
                ->
filter('Sort:GreaterThan'$record->Sort)
                ->
first();

            if (!
$next) {
                
$prev DataObject::get($className)
                    ->
filter('ParentID'$record->ParentID)
                    ->
filter('Sort:LessThan'$record->Sort)
                    ->
reverse()
                    ->
first();
            }

            
$link Controller::join_links($recordController->Link("show"), $record->ID);
            
$html LeftAndMain_TreeNode::create($record$link$this->isCurrentPage($record))
                ->
forTemplate() . '</li>';

            
$data[$id] = array(
                
'html' => $html,
                
'ParentID' => $record->ParentID,
                
'NextID' => $next $next->ID null,
                
'PrevID' => $prev $prev->ID null
            
);
        }
        
$this->getResponse()->addHeader('Content-Type''text/json');
        return 
Convert::raw2json($data);
    }

    
/**
     * Save  handler
     */
    
public function save($data$form) {
        
$className $this->stat('tree_class');

        
// Existing or new record?
        
$id $data['ID'];
        if(
substr($id,0,3) != 'new') {
            
$record DataObject::get_by_id($className$id);
            if(
$record && !$record->canEdit()) return Security::permissionFailure($this);
            if(!
$record || !$record->ID$this->httpError(404"Bad record ID #" . (int)$id);
        } else {
            if(!
singleton($this->stat('tree_class'))->canCreate()) return Security::permissionFailure($this);
            
$record $this->getNewItem($idfalse);
        }

        
// save form data into record
        
$form->saveInto($recordtrue);
        
$record->write();
        
$this->extend('onAfterSave'$record);
        
$this->setCurrentPageID($record->ID);

        
$this->getResponse()->addHeader('X-Status'rawurlencode(_t('LeftAndMain.SAVEDUP''Saved.')));
        return 
$this->getResponseNegotiator()->respond($this->getRequest());
    }

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

        
$id $data['ID'];
        
$record DataObject::get_by_id($className$id);
        if(
$record && !$record->canDelete()) return Security::permissionFailure();
        if(!
$record || !$record->ID$this->httpError(404"Bad record ID #" . (int)$id);

        
$record->delete();

        
$this->getResponse()->addHeader('X-Status'rawurlencode(_t('LeftAndMain.DELETED''Deleted.')));
        return 
$this->getResponseNegotiator()->respond(
            
$this->getRequest(),
            array(
'currentform' => array($this'EmptyForm'))
        );
    }

    
/**
     * Update the position and parent of a tree node.
     * Only saves the node if changes were made.
     *
     * Required data:
     * - 'ID': The moved node
     * - 'ParentID': New parent relation of the moved node (0 for root)
     * - 'SiblingIDs': Array of all sibling nodes to the moved node (incl. the node itself).
     *   In case of a 'ParentID' change, relates to the new siblings under the new parent.
     *
     * @return SS_HTTPResponse JSON string with a
     */
    
public function savetreenode($request) {
        if (!
Permission::check('SITETREE_REORGANISE') && !Permission::check('ADMIN')) {
            
$this->getResponse()->setStatusCode(
                
403,
                
_t('LeftAndMain.CANT_REORGANISE',
                    
"You do not have permission to rearange the site tree. Your change was not saved.")
            );
            return;
        }

        
$className $this->stat('tree_class');
        
$statusUpdates = array('modified'=>array());
        
$id $request->requestVar('ID');
        
$parentID $request->requestVar('ParentID');

        if(
$className == 'SiteTree' && $page DataObject::get_by_id('Page'$id)){
            
$root $page->getParentType();
            if((
$parentID == '0' || $root == 'root') && !SiteConfig::current_site_config()->canCreateTopLevel()){
                
$this->getResponse()->setStatusCode(
                    
403,
                    
_t('LeftAndMain.CANT_REORGANISE',
                        
"You do not have permission to alter Top level pages. Your change was not saved.")
                    );
                return;
            }
        }

        
$siblingIDs $request->requestVar('SiblingIDs');
        
$statusUpdates = array('modified'=>array());
        if(!
is_numeric($id) || !is_numeric($parentID)) throw new InvalidArgumentException();

        
$node DataObject::get_by_id($className$id);
        if(
$node && !$node->canEdit()) return Security::permissionFailure($this);

        if(!
$node) {
            
$this->getResponse()->setStatusCode(
                
500,
                
_t('LeftAndMain.PLEASESAVE',
                    
"Please Save Page: This page could not be updated because it hasn't been saved yet."
                
)
            );
            return;
        }

        
// Update hierarchy (only if ParentID changed)
        
if($node->ParentID != $parentID) {
            
$node->ParentID = (int)$parentID;
            
$node->write();

            
$statusUpdates['modified'][$node->ID] = array(
                
'TreeTitle'=>$node->TreeTitle
            
);

            
// Update all dependent pages
            
if(class_exists('VirtualPage')) {
                
$virtualPages VirtualPage::get()->filter("CopyContentFromID"$node->ID);
                foreach(
$virtualPages as $virtualPage) {
                    
$statusUpdates['modified'][$virtualPage->ID] = array(
                        
'TreeTitle' => $virtualPage->TreeTitle()
                    );
                }
            }

            
$this->getResponse()->addHeader('X-Status',
                
rawurlencode(_t('LeftAndMain.REORGANISATIONSUCCESSFUL''Reorganised the site tree successfully.')));
        }

        
// Update sorting
        
if(is_array($siblingIDs)) {
            
$counter 0;
            foreach(
$siblingIDs as $id) {
                if(
$id == $node->ID) {
                    
$node->Sort = ++$counter;
                    
$node->write();
                    
$statusUpdates['modified'][$node->ID] = array(
                        
'TreeTitle' => $node->TreeTitle
                    
);
                } else if(
is_numeric($id)) {
                    
// Nodes that weren't "actually moved" shouldn't be registered as
                    // having been edited; do a direct SQL update instead
                    
++$counter;
                    
DB::prepared_query(
                        
"UPDATE "$className" SET "Sort" = ? WHERE "ID" = ?",
                        array(
$counter$id)
                    );
                }
            }

            
$this->getResponse()->addHeader('X-Status',
                
rawurlencode(_t('LeftAndMain.REORGANISATIONSUCCESSFUL''Reorganised the site tree successfully.')));
        }

        return 
Convert::raw2json($statusUpdates);
    }

    public function 
CanOrganiseSitetree() {
        return !
Permission::check('SITETREE_REORGANISE') && !Permission::check('ADMIN') ? false true;
    }

    
/**
     * Retrieves an edit form, either for display, or to process submitted data.
     * Also used in the template rendered through {@link Right()} in the $EditForm placeholder.
     *
     * This is a "pseudo-abstract" methoed, usually connected to a {@link getEditForm()}
     * method in an entwine subclass. This method can accept a record identifier,
     * selected either in custom logic, or through {@link currentPageID()}.
     * The form usually construct itself from {@link DataObject->getCMSFields()}
     * for the specific managed subclass defined in {@link LeftAndMain::$tree_class}.
     *
     * @param HTTPRequest $request Optionally contains an identifier for the
     *  record to load into the form.
     * @return Form Should return a form regardless wether a record has been found.
     *  Form might be readonly if the current user doesn't have the permission to edit
     *  the record.
     */
    /**
     * @return Form
     */
    
public function EditForm($request null) {
        return 
$this->getEditForm();
    }

    
/**
     * Calls {@link SiteTree->getCMSFields()}
     *
     * @param Int $id
     * @param FieldList $fields
     * @return Form
     */
    
public function getEditForm($id null$fields null) {
        if(!
$id$id $this->currentPageID();

        if(
is_object($id)) {
            
$record $id;
        } else {
            
$record $this->getRecord($id);
            if(
$record && !$record->canView()) return Security::permissionFailure($this);
        }

        if(
$record) {
            
$fields = ($fields) ? $fields $record->getCMSFields();
            if (
$fields == null) {
                
user_error(
                    
"getCMSFields() returned null  - it should return a FieldList object.
                    Perhaps you forgot to put a return statement at the end of your method?"
,
                    
E_USER_ERROR
                
);
            }

            
// Add hidden fields which are required for saving the record
            // and loading the UI state
            
if(!$fields->dataFieldByName('ClassName')) {
                
$fields->push(new HiddenField('ClassName'));
            }

            
$tree_class $this->stat('tree_class');
            if(
                
$tree_class::has_extension('Hierarchy')
                && !
$fields->dataFieldByName('ParentID')
            ) {
                
$fields->push(new HiddenField('ParentID'));
            }

            
// Added in-line to the form, but plucked into different view by frontend scripts.
            
if(in_array('CMSPreviewable'class_implements($record))) {
                
$navField = new LiteralField('SilverStripeNavigator'$this->getSilverStripeNavigator());
                
$navField->setAllowHTML(true);
                
$fields->push($navField);
            }

            if(
$record->hasMethod('getAllCMSActions')) {
                
$actions $record->getAllCMSActions();
            } else {
                
$actions $record->getCMSActions();
                
// add default actions if none are defined
                
if(!$actions || !$actions->Count()) {
                    if(
$record->hasMethod('canEdit') && $record->canEdit()) {
                        
$actions->push(
                            
FormAction::create('save',_t('CMSMain.SAVE','Save'))
                                ->
addExtraClass('ss-ui-action-constructive')->setAttribute('data-icon''accept')
                        );
                    }
                    if(
$record->hasMethod('canDelete') && $record->canDelete()) {
                        
$actions->push(
                            
FormAction::create('delete',_t('ModelAdmin.DELETE','Delete'))
                                ->
addExtraClass('ss-ui-action-destructive')
                        );
                    }
                }
            }

            
// Use <button> to allow full jQuery UI styling
            
$actionsFlattened $actions->dataFields();
            if(
$actionsFlattened) foreach($actionsFlattened as $action$action->setUseButtonTag(true);

            
$form CMSForm::create(
                
$this"EditForm"$fields$actions
            
)->setHTMLID('Form_EditForm');
            
$form->setResponseNegotiator($this->getResponseNegotiator());
            
$form->addExtraClass('cms-edit-form');
            
$form->loadDataFrom($record);
            
$form->setTemplate($this->getTemplatesWithSuffix('_EditForm'));
            
$form->setAttribute('data-pjax-fragment''CurrentForm');

            
// Announce the capability so the frontend can decide whether to allow preview or not.
            
if(in_array('CMSPreviewable'class_implements($record))) {
                
$form->addExtraClass('cms-previewable');
            }

            
// Set this if you want to split up tabs into a separate header row
            // if($form->Fields()->hasTabset()) {
            //     $form->Fields()->findOrMakeTab('Root')->setTemplate('CMSTabSet');
            // }

            // Add a default or custom validator.
            // @todo Currently the default Validator.js implementation
            //  adds javascript to the document body, meaning it won't
            //  be included properly if the associated fields are loaded
            //  through ajax. This means only serverside validation
            //  will kick in for pages+validation loaded through ajax.
            //  This will be solved by using less obtrusive javascript validation
            //  in the future, see http://open.silverstripe.com/ticket/2915 and
            //  http://open.silverstripe.com/ticket/3386
            
if($record->hasMethod('getCMSValidator')) {
                
$validator $record->getCMSValidator();
                
// The clientside (mainly LeftAndMain*.js) rely on ajax responses
                // which can be evaluated as javascript, hence we need
                // to override any global changes to the validation handler.
                
$form->setValidator($validator);
            } else {
                
$form->unsetValidator();
            }

            if(
$record->hasMethod('canEdit') && !$record->canEdit()) {
                
$readonlyFields $form->Fields()->makeReadonly();
                
$form->setFields($readonlyFields);
            }
        } else {
            
$form $this->EmptyForm();
        }

        return 
$form;
    }

    
/**
     * Returns a placeholder form, used by {@link getEditForm()} if no record is selected.
     * Our javascript logic always requires a form to be present in the CMS interface.
     *
     * @return Form
     */
    
public function EmptyForm() {
        
$form CMSForm::create(
            
$this,
            
"EditForm",
            new 
FieldList(
                
// new HeaderField(
                //     'WelcomeHeader',
                //     $this->getApplicationName()
                // ),
                // new LiteralField(
                //     'WelcomeText',
                //     sprintf('<p id="WelcomeMessage">%s %s. %s</p>',
                //         _t('LeftAndMain_right_ss.WELCOMETO','Welcome to'),
                //         $this->getApplicationName(),
                //         _t('CHOOSEPAGE','Please choose an item from the left.')
                //     )
                // )
            
),
            new 
FieldList()
        )->
setHTMLID('Form_EditForm');
        
$form->setResponseNegotiator($this->getResponseNegotiator());
        
$form->unsetValidator();
        
$form->addExtraClass('cms-edit-form');
        
$form->addExtraClass('root-form');
        
$form->setTemplate($this->getTemplatesWithSuffix('_EditForm'));
        
$form->setAttribute('data-pjax-fragment''CurrentForm');

        return 
$form;
    }

    
/**
     * Return the CMS's HTML-editor toolbar
     */
    
public function EditorToolbar() {
        return 
HtmlEditorField_Toolbar::create($this"EditorToolbar");
    }

    
/**
     * Renders a panel containing tools which apply to all displayed
     * "content" (mostly through {@link EditForm()}), for example a tree navigation or a filter panel.
     * Auto-detects applicable templates by naming convention: "<controller classname>_Tools.ss",
     * and takes the most specific template (see {@link getTemplatesWithSuffix()}).
     * To explicitly disable the panel in the subclass, simply create a more specific, empty template.
     *
     * @return String HTML
     */
    
public function Tools() {
        
$templates $this->getTemplatesWithSuffix('_Tools');
        if(
$templates) {
            
$viewer = new SSViewer($templates);
            return 
$viewer->process($this);
        } else {
            return 
false;
        }
    }

    
/**
     * Renders a panel containing tools which apply to the currently displayed edit form.
     * The main difference to {@link Tools()} is that the panel is displayed within
     * the element structure of the form panel (rendered through {@link EditForm}).
     * This means the panel will be loaded alongside new forms, and refreshed upon save,
     * which can mean a performance hit, depending on how complex your panel logic gets.
     * Any form fields contained in the returned markup will also be submitted with the main form,
     * which might be desired depending on the implementation details.
     *
     * @return String HTML
     */
    
public function EditFormTools() {
        
$templates $this->getTemplatesWithSuffix('_EditFormTools');
        if(
$templates) {
            
$viewer = new SSViewer($templates);
            return 
$viewer->process($this);
        } else {
            return 
false;
        }
    }

    
/**
     * Batch Actions Handler
     */
    
public function batchactions() {
        return new 
CMSBatchActionHandler($this'batchactions'$this->stat('tree_class'));
    }

    
/**
     * @return Form
     */
    
public function BatchActionsForm() {
        
$actions $this->batchactions()->batchActionList();
        
$actionsMap = array('-1' => _t('LeftAndMain.DropdownBatchActionsDefault''Choose an action...')); // Placeholder action
        
foreach($actions as $action) {
            
$actionsMap[$action->Link] = $action->Title;
        }

        
$form = new Form(
            
$this,
            
'BatchActionsForm',
            new 
FieldList(
                new 
HiddenField('csvIDs'),
                
DropdownField::create(
                    
'Action',
                    
false,
                    
$actionsMap
                
)
                    ->
setAttribute('autocomplete''off')
                    ->
setAttribute('data-placeholder'_t('LeftAndMain.DropdownBatchActionsDefault''Choose an action...'))
            ),
            new 
FieldList(
                
// TODO i18n
                
new FormAction('submit'_t('Form.SubmitBtnLabel'"Go"))
            )
        );
        
$form->addExtraClass('cms-batch-actions nostyle');
        
$form->unsetValidator();

        
$this->extend('updateBatchActionsForm'$form);
        return 
$form;
    }

    public function 
printable() {
        
$form $this->getEditForm($this->currentPageID());
        if(!
$form) return false;

        
$form->transform(new PrintableTransformation());
        
$form->setActions(null);

        
Requirements::clear();
        
Requirements::css(FRAMEWORK_ADMIN_DIR '/css/LeftAndMain_printable.css');
        return array(
            
"PrintForm" => $form
        
);
    }

    
/**
     * Used for preview controls, mainly links which switch between different states of the page.
     *
     * @return ArrayData
     */
    
public function getSilverStripeNavigator() {
        
$page $this->currentPage();
        if(
$page) {
            
$navigator = new SilverStripeNavigator($page);
            return 
$navigator->renderWith($this->getTemplatesWithSuffix('_SilverStripeNavigator'));
        } else {
            return 
false;
        }
    }

    
/**
     * Identifier for the currently shown record,
     * in most cases a database ID. Inspects the following
     * sources (in this order):
     * - GET/POST parameter named 'ID'
     * - URL parameter named 'ID'
     * - Session value namespaced by classname, e.g. "CMSMain.currentPage"
     *
     * @return int
     */
    
public function currentPageID() {
        if(
$this->getRequest()->requestVar('ID') && is_numeric($this->getRequest()->requestVar('ID')))    {
            return 
$this->getRequest()->requestVar('ID');
        } elseif (isset(
$this->urlParams['ID']) && is_numeric($this->urlParams['ID'])) {
            return 
$this->urlParams['ID'];
        } elseif(
Session::get($this->sessionNamespace() . ".currentPage")) {
            return 
Session::get($this->sessionNamespace() . ".currentPage");
        } else {
            return 
null;
        }
    }

    
/**
     * Forces the current page to be set in session,
     * which can be retrieved later through {@link currentPageID()}.
     * Keep in mind that setting an ID through GET/POST or
     * as a URL parameter will overrule this value.
     *
     * @param int $id
     */
    
public function setCurrentPageID($id) {
        
Session::set($this->sessionNamespace() . ".currentPage"$id);
    }

    
/**
     * Uses {@link getRecord()} and {@link currentPageID()}
     * to get the currently selected record.
     *
     * @return DataObject
     */
    
public function currentPage() {
        return 
$this->getRecord($this->currentPageID());
    }

    
/**
     * Compares a given record to the currently selected one (if any).
     * Used for marking the current tree node.
     *
     * @return boolean
     */
    
public function isCurrentPage(DataObject $record) {
        return (
$record->ID == $this->currentPageID());
    }

    
/**
     * @return String
     */
    
protected function sessionNamespace() {
        
$override $this->stat('session_namespace');
        return 
$override $override $this->class;
    }

    
/**
     * URL to a previewable record which is shown through this controller.
     * The controller might not have any previewable content, in which case
     * this method returns FALSE.
     *
     * @return String|boolean
     */
    
public function LinkPreview() {
        return 
false;
    }

    
/**
     * Return the version number of this application.
     * Uses the number in <mymodule>/silverstripe_version
     * (automatically replaced by build scripts).
     * If silverstripe_version is empty,
     * then attempts to get it from composer.lock
     *
     * @return string
     */
    
public function CMSVersion() {
        
$versions = array();
        
$modules = array(
            
'silverstripe/framework' => array(
                
'title' => 'Framework',
                
'versionFile' => FRAMEWORK_PATH '/silverstripe_version',
            )
        );
        if(
defined('CMS_PATH')) {
            
$modules['silverstripe/cms'] = array(
                
'title' => 'CMS',
                
'versionFile' => CMS_PATH '/silverstripe_version',
            );
        }

        
// Tries to obtain version number from composer.lock if it exists
        
$composerLockPath BASE_PATH '/composer.lock';
        if (
file_exists($composerLockPath)) {
            
$cache SS_Cache::factory('LeftAndMain_CMSVersion');
            
$cacheKey filemtime($composerLockPath);
            
$versions $cache->load($cacheKey);
            if(
$versions) {
                
$versions json_decode($versionstrue);
            } else {
                
$versions = array();
            }
            if(!
$versions && $jsonData file_get_contents($composerLockPath)) {
                
$lockData json_decode($jsonData);
                if(
$lockData && isset($lockData->packages)) {
                    foreach (
$lockData->packages as $package) {
                        if(
                            
array_key_exists($package->name$modules)
                            && isset(
$package->version)
                        ) {
                            
$versions[$package->name] = $package->version;
                        }
                    }
                    
$cache->save(json_encode($versions), $cacheKey);
                }
            }
        }

        
// Fall back to static version file
        
foreach($modules as $moduleName => $moduleSpec) {
            if(!isset(
$versions[$moduleName])) {
                if(
$staticVersion file_get_contents($moduleSpec['versionFile'])) {
                    
$versions[$moduleName] = $staticVersion;
                } else {
                    
$versions[$moduleName] = _t('LeftAndMain.VersionUnknown''Unknown');
                }
            }
        }

        
$out = array();
        foreach(
$modules as $moduleName => $moduleSpec) {
            
$out[] = $modules[$moduleName]['title'] . ': ' $versions[$moduleName];
        }
        return 
implode(', '$out);
    }

    
/**
     * @return array
     */
    
public function SwitchView() {
        if(
$page $this->currentPage()) {
            
$nav SilverStripeNavigator::get_for_record($page);
            return 
$nav['items'];
        }
    }

    
/**
     * @return SiteConfig
     */
    
public function SiteConfig() {
        return (
class_exists('SiteConfig')) ? SiteConfig::current_site_config() : null;
    }

    
/**
     * The href for the anchor on the Silverstripe logo.
     * Set by calling LeftAndMain::set_application_link()
     *
     * @config
     * @var String
     */
    
private static $application_link '//www.silverstripe.org/';

    
/**
     * Sets the href for the anchor on the Silverstripe logo in the menu
     *
     * @deprecated since version 4.0
     *
     * @param String $link
     */
    
public static function set_application_link($link) {
        
Deprecation::notice('4.0''Use the "LeftAndMain.application_link" config setting instead');
        
Config::inst()->update('LeftAndMain''application_link'$link);
    }

    
/**
     * @return String
     */
    
public function ApplicationLink() {
        return 
$this->stat('application_link');
    }

    
/**
     * The application name. Customisable by calling
     * LeftAndMain::setApplicationName() - the first parameter.
     *
     * @config
     * @var String
     */
    
private static $application_name 'SilverStripe';

    
/**
     * @param String $name
     * @deprecated since version 4.0
     */
    
public static function setApplicationName($name) {
        
Deprecation::notice('4.0''Use the "LeftAndMain.application_name" config setting instead');
        
Config::inst()->update('LeftAndMain''application_name'$name);
    }

    
/**
     * Get the application name.
     *
     * @return string
     */
    
public function getApplicationName() {
        return 
$this->stat('application_name');
    }

    
/**
     * @return string
     */
    
public function Title() {
        
$app $this->getApplicationName();

        return (
$section $this->SectionTitle()) ? sprintf('%s - %s'$app$section) : $app;
    }

    
/**
     * Return the title of the current section. Either this is pulled from
     * the current panel's menu_title or from the first active menu
     *
     * @return string
     */
    
public function SectionTitle() {
        
$class get_class($this);
        
$defaultTitle LeftAndMain::menu_title_for_class($class);
        if(
$title _t("{$class}.MENUTITLE"$defaultTitle)) return $title;

        foreach(
$this->MainMenu() as $menuItem) {
            if(
$menuItem->LinkingMode != 'link') return $menuItem->Title;
        }
    }

    
/**
     * Return the base directory of the tiny_mce codebase
     */
    
public function MceRoot() {
        return 
MCE_ROOT;
    }

    
/**
     * Same as {@link ViewableData->CSSClasses()}, but with a changed name
     * to avoid problems when using {@link ViewableData->customise()}
     * (which always returns "ArrayData" from the $original object).
     *
     * @return String
     */
    
public function BaseCSSClasses() {
        return 
$this->CSSClasses('Controller');
    }

    
/**
     * @return String
     */
    
public function Locale() {
        return 
DBField::create_field('DBLocale'i18n::get_locale());
    }

    public function 
providePermissions() {
        
$perms = array(
            
"CMS_ACCESS_LeftAndMain" => array(
                
'name' => _t('CMSMain.ACCESSALLINTERFACES''Access to all CMS sections'),
                
'category' => _t('Permission.CMS_ACCESS_CATEGORY''CMS Access'),
                
'help' => _t('CMSMain.ACCESSALLINTERFACESHELP''Overrules more specific access settings.'),
                
'sort' => -100
            
)
        );

        
// Add any custom ModelAdmin subclasses. Can't put this on ModelAdmin itself
        // since its marked abstract, and needs to be singleton instanciated.
        
foreach(ClassInfo::subclassesFor('ModelAdmin') as $i => $class) {
            if(
$class == 'ModelAdmin') continue;
            if(
ClassInfo::classImplements($class'TestOnly')) continue;

            
$title _t("{$class}.MENUTITLE"LeftAndMain::menu_title_for_class($class));
            
$perms["CMS_ACCESS_" $class] = array(
                
'name' => _t(
                    
'CMSMain.ACCESS',
                    
"Access to '{title}' section",
                    
"Item in permission selection identifying the admin section. Example: Access to 'Files & Images'",
                    array(
'title' => $title)
                ),
                
'category' => _t('Permission.CMS_ACCESS_CATEGORY''CMS Access')
            );
        }

        return 
$perms;
    }

    
/**
     * Register the given javascript file as required in the CMS.
     * Filenames should be relative to the base, eg, FRAMEWORK_DIR . '/javascript/loader.js'
     *
     * @deprecated since version 4.0
     */
    
public static function require_javascript($file) {
        
Deprecation::notice('4.0''Use "LeftAndMain.extra_requirements_javascript" config setting instead');
        
Config::inst()->update('LeftAndMain''extra_requirements_javascript', array($file => array()));
    }

    
/**
     * Register the given stylesheet file as required.
     * @deprecated since version 4.0
     *
     * @param $file String Filenames should be relative to the base, eg, THIRDPARTY_DIR . '/tree/tree.css'
     * @param $media String Comma-separated list of media-types (e.g. "screen,projector")
     * @see http://www.w3.org/TR/REC-CSS2/media.html
     */
    
public static function require_css($file$media null) {
        
Deprecation::notice('4.0''Use "LeftAndMain.extra_requirements_css" config setting instead');
        
Config::inst()->update('LeftAndMain''extra_requirements_css', array($file => array('media' => $media)));
    }

    
/**
     * Register the given "themeable stylesheet" as required.
     * Themeable stylesheets have globally unique names, just like templates and PHP files.
     * Because of this, they can be replaced by similarly named CSS files in the theme directory.
     *
     * @deprecated since version 4.0
     *
     * @param $name String The identifier of the file.  For example, css/MyFile.css would have the identifier "MyFile"
     * @param $media String Comma-separated list of media-types (e.g. "screen,projector")
     */
    
public static function require_themed_css($name$media null) {
        
Deprecation::notice('4.0''Use "LeftAndMain.extra_requirements_themedCss" config setting instead');
        
Config::inst()->update('LeftAndMain''extra_requirements_themedCss', array($name => array('media' => $media)));
    }

}

/**
 * @package cms
 * @subpackage core
 */
class LeftAndMainMarkingFilter {

    
/**
     * @var array Request params (unsanitized)
     */
    
protected $params = array();

    
/**
     * @param array $params Request params (unsanitized)
     */
    
public function __construct($params null) {
        
$this->ids = array();
        
$this->expanded = array();
        
$parents = array();

        
$q $this->getQuery($params);
        
$res $q->execute();
        if (!
$res) return;

        
// And keep a record of parents we don't need to get parents
        // of themselves, as well as IDs to mark
        
foreach($res as $row) {
            if (
$row['ParentID']) $parents[$row['ParentID']] = true;
            
$this->ids[$row['ID']] = true;
        }

        
// We need to recurse up the tree,
        // finding ParentIDs for each ID until we run out of parents
        
while (!empty($parents)) {
            
$parentsClause DB::placeholders($parents);
            
$res DB::prepared_query(
                
"SELECT "ParentID", "ID" FROM "SiteTree" WHERE "ID" in ($parentsClause)",
                
array_keys($parents)
            );
            
$parents = array();

            foreach(
$res as $row) {
                if (
$row['ParentID']) $parents[$row['ParentID']] = true;
                
$this->ids[$row['ID']] = true;
                
$this->expanded[$row['ID']] = true;
            }
        }
    }

    protected function 
getQuery($params) {
        
$where = array();

        if(isset(
$params['ID'])) unset($params['ID']);
        if(
$treeClass = static::config()->tree_class) foreach($params as $name => $val) {
            
// Partial string match against a variety of fields
            
if(!empty($val) && singleton($treeClass)->hasDatabaseField($name)) {
                
$predicate sprintf('"%s" LIKE ?'$name);
                
$where[$predicate] = "%$val%";
            }
        }

        return new 
SQLQuery(
            array(
"ParentID""ID"),
            
'SiteTree',
            
$where
        
);
    }

    public function 
mark($node) {
        
$id $node->ID;
        if(
array_key_exists((int) $id$this->expanded)) $node->markOpened();
        return 
array_key_exists((int) $id$this->ids) ? $this->ids[$id] : false;
    }
}

/**
 * Allow overriding finished state for faux redirects.
 *
 * @package framework
 * @subpackage admin
 */
class LeftAndMain_HTTPResponse extends SS_HTTPResponse {

    protected 
$isFinished false;

    public function 
isFinished() {
        return (
parent::isFinished() || $this->isFinished);
    }

    public function 
setIsFinished($bool) {
        
$this->isFinished $bool;
    }

}

/**
 * Wrapper around objects being displayed in a tree.
 * Caution: Volatile API.
 *
 * @todo Implement recursive tree node rendering.
 *
 * @package framework
 * @subpackage admin
 */
class LeftAndMain_TreeNode extends ViewableData {

    
/**
     * Object represented by this node
     *
     * @var Object
     */
    
protected $obj;

    
/**
     * Edit link to the current record in the CMS
     *
     * @var string
     */
    
protected $link;

    
/**
     * True if this is the currently selected node in the tree
     *
     * @var bool
     */
    
protected $isCurrent;

    
/**
     * Name of method to count the number of children
     *
     * @var string
     */
    
protected $numChildrenMethod;


    
/**
     *
     * @var LeftAndMain_SearchFilter
     */
    
protected $filter;

    
/**
     * @param Object $obj
     * @param string $link
     * @param bool $isCurrent
     * @param string $numChildrenMethod
     * @param LeftAndMain_SearchFilter $filter
     */
    
public function __construct($obj$link null$isCurrent false,
        
$numChildrenMethod 'numChildren'$filter null
    
) {
        
parent::__construct();
        
$this->obj $obj;
        
$this->link $link;
        
$this->isCurrent $isCurrent;
        
$this->numChildrenMethod $numChildrenMethod;
        
$this->filter $filter;
    }

    
/**
     * Returns template, for further processing by {@link Hierarchy->getChildrenAsUL()}.
     * Does not include closing tag to allow this method to inject its own children.
     *
     * @todo Remove hardcoded assumptions around returning an <li>, by implementing recursive tree node rendering
     *
     * @return String
     */
    
public function forTemplate() {
        
$obj $this->obj;
        return 
"<li id="record-$obj->ID" data-id="$obj->ID" data-pagetype="$obj->ClassName" class=""
            . 
$this->getClasses() . "">" "<ins class="jstree-icon">&nbsp;</ins>"
            
"<a href="" . $this->getLink() . "" title="("
            . trim(_t('LeftAndMain.PAGETYPE','Page type'), " 
:") // account for inconsistencies in translations
            . "
" . $obj->i18n_singular_name() . "$obj->Title" ><ins class="jstree-icon">&nbsp;</ins><span class="text">" . ($obj->TreeTitle)
            . 
"</span></a>";
    }

    
/**
     * Determine the CSS classes to apply to this node
     *
     * @return string
     */
    
public function getClasses() {
        
// Get classes from object
        
$classes $this->obj->CMSTreeClasses($this->numChildrenMethod);
        if(
$this->isCurrent) {
            
$classes .= ' current';
        }
        
// Get status flag classes
        
$flags $this->obj->hasMethod('getStatusFlags')
            ? 
$this->obj->getStatusFlags()
            : 
false;
        if (
$flags) {
            
$statuses array_keys($flags);
            foreach (
$statuses as $s) {
                
$classes .= ' status-' $s;
            }
        }
        
// Get additional filter classes
        
if($this->filter && ($filterClasses $this->filter->getPageClasses($this->obj))) {
            if(
is_array($filterClasses)) {
                
$filterClasses implode(' ' $filterClasses);
            }
            
$classes .= ' ' $filterClasses;
        }
        return 
$classes;
    }

    public function 
getObj() {
        return 
$this->obj;
    }

    public function 
setObj($obj) {
        
$this->obj $obj;
        return 
$this;
    }

    public function 
getLink() {
        return 
$this->link;
    }

    public function 
setLink($link) {
        
$this->link $link;
        return 
$this;
    }

    public function 
getIsCurrent() {
        return 
$this->isCurrent;
    }

    public function 
setIsCurrent($bool) {
        
$this->isCurrent $bool;
        return 
$this;
    }

}

/**
 * Abstract interface for a class which may be used to filter the results displayed
 * in a nested tree
 */
interface LeftAndMain_SearchFilter {

    
/**
     * Method on {@link Hierarchy} objects which is used to traverse into children relationships.
     *
     * @return string
     */
    
public function getChildrenMethod();

    
/**
     * Method on {@link Hierarchy} objects which is used find the number of children for a parent page
     *
     * @return string
     */
    
public function getNumChildrenMethod();


    
/**
     * Returns TRUE if the given page should be included in the tree.
     * Caution: Does NOT check view permissions on the page.
     *
     * @param DataObject $page
     * @return bool
     */
    
public function isPageIncluded($page);

    
/**
     * Given a page, determine any additional CSS classes to apply to the tree node
     *
     * @param DataObject $page
     * @return array|string
     */
    
public function getPageClasses($page);
}
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