silverstripe-framework/admin/code/CMSMenu.php

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<?php
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namespace SilverStripe\Admin;
use SilverStripe\Core\ClassInfo;
use SilverStripe\Core\Config\Config;
use SilverStripe\Core\Convert;
use SilverStripe\Core\Object;
use SilverStripe\Control\Controller;
use SilverStripe\i18n\i18n;
use SilverStripe\i18n\i18nEntityProvider;
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use SilverStripe\Security\Member;
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use IteratorAggregate;
use ReflectionClass;
use ArrayIterator;
/**
* The object manages the main CMS menu. See {@link LeftAndMain::init()} for
* example usage.
*
* The menu will be automatically populated with menu items for subclasses of
* {@link LeftAndMain}. That is, for each class in the CMS that creates an
* administration panel, a CMS menu item will be created. The default
* configuration will also include a 'help' link to the SilverStripe user
* documentation.
*
* Additional CMSMenu items can be added through {@link LeftAndMainExtension::init()}
* extensions added to {@link LeftAndMain}.
*/
class CMSMenu extends Object implements IteratorAggregate, i18nEntityProvider
{
/**
* Sort by menu priority, highest to lowest
*/
const MENU_PRIORITY = 'menu_priority';
/**
* Sort by url priority, highest to lowest
*/
const URL_PRIORITY = 'url_priority';
/**
* An array of changes to be made to the menu items, in the order that the changes should be
* applied. Each item is a map in one of the two forms:
* - array('type' => 'add', 'item' => new CMSMenuItem(...) )
* - array('type' => 'remove', 'code' => 'codename' )
*/
protected static $menu_item_changes = array();
/**
* Set to true if clear_menu() is called, to indicate that the default menu shouldn't be
* included
*/
protected static $menu_is_cleared = false;
/**
* Generate CMS main menu items by collecting valid
* subclasses of {@link LeftAndMain}
*/
public static function populate_menu()
{
self::$menu_is_cleared = false;
}
/**
* Add a LeftAndMain controller to the CMS menu.
*
* @param string $controllerClass The class name of the controller
* @todo A director rule is added when a controller link is added, but it won't be removed
* when the item is removed. Functionality needed in {@link Director}.
*/
public static function add_controller($controllerClass)
{
if ($menuItem = self::menuitem_for_controller($controllerClass)) {
$code = static::get_menu_code($controllerClass);
self::add_menu_item_obj($code, $menuItem);
}
}
/**
* Return a CMSMenuItem to add the given controller to the CMSMenu
*
* @param string $controllerClass
* @return CMSMenuItem
*/
protected static function menuitem_for_controller($controllerClass)
{
$urlBase = AdminRootController::admin_url();
$urlSegment = Config::inst()->get($controllerClass, 'url_segment', Config::FIRST_SET);
$menuPriority = Config::inst()->get($controllerClass, 'menu_priority', Config::FIRST_SET);
// Don't add menu items defined the old way
if (!$urlSegment) {
return null;
}
$link = Controller::join_links($urlBase, $urlSegment) . '/';
// doesn't work if called outside of a controller context (e.g. in _config.php)
// as the locale won't be detected properly. Use {@link LeftAndMain->MainMenu()} to update
// titles for existing menu entries
$menuTitle = LeftAndMain::menu_title($controllerClass);
return new CMSMenuItem($menuTitle, $link, $controllerClass, $menuPriority);
}
/**
* Add an arbitrary URL to the CMS menu.
*
* @param string $code A unique identifier (used to create a CSS ID and its key in {@link $menu_items})
* @param string $menuTitle The link's title in the CMS menu
* @param string $url The url of the link
* @param integer $priority The menu priority (sorting order) of the menu item. Higher priorities will be further
* left.
* @param array $attributes an array of attributes to include on the link.
*
* @return boolean The result of the operation.
*/
public static function add_link($code, $menuTitle, $url, $priority = -1, $attributes = null)
{
return self::add_menu_item($code, $menuTitle, $url, null, $priority, $attributes);
}
/**
* Add a navigation item to the main administration menu showing in the top bar.
*
* uses {@link CMSMenu::$menu_items}
*
* @param string $code Unique identifier for this menu item (e.g. used by {@link replace_menu_item()} and
* {@link remove_menu_item}. Also used as a CSS-class for icon customization.
* @param string $menuTitle Localized title showing in the menu bar
* @param string $url A relative URL that will be linked in the menu bar.
* @param string $controllerClass The controller class for this menu, used to check permisssions.
* If blank, it's assumed that this is public, and always shown to users who
* have the rights to access some other part of the admin area.
* @param int $priority
* @param array $attributes an array of attributes to include on the link.
* @return bool Success
*/
public static function add_menu_item(
$code,
$menuTitle,
$url,
$controllerClass = null,
$priority = -1,
$attributes = null
) {
// If a class is defined, then force the use of that as a code. This helps prevent menu item duplication
if ($controllerClass) {
$code = self::get_menu_code($controllerClass);
}
return self::replace_menu_item($code, $menuTitle, $url, $controllerClass, $priority, $attributes);
}
/**
* Get a single menu item by its code value.
*
* @param string $code
* @return array
*/
public static function get_menu_item($code)
{
$menuItems = self::get_menu_items();
return (isset($menuItems[$code])) ? $menuItems[$code] : false;
}
/**
* Get menu code for class
*
* @param string $cmsClass Controller class name
* @return string
*/
public static function get_menu_code($cmsClass)
{
return Convert::raw2htmlname(str_replace('\\', '-', $cmsClass));
}
/**
* Get all menu entries.
*
* @return array
*/
public static function get_menu_items()
{
$menuItems = array();
// Set up default menu items
if (!self::$menu_is_cleared) {
$cmsClasses = self::get_cms_classes();
foreach ($cmsClasses as $cmsClass) {
$menuItem = self::menuitem_for_controller($cmsClass);
$menuCode = self::get_menu_code($cmsClass);
if ($menuItem) {
$menuItems[$menuCode] = $menuItem;
}
}
}
// Apply changes
foreach (self::$menu_item_changes as $change) {
switch ($change['type']) {
case 'add':
$menuItems[$change['code']] = $change['item'];
break;
case 'remove':
unset($menuItems[$change['code']]);
break;
default:
user_error("Bad menu item change type {$change['type']}", E_USER_WARNING);
}
}
// Sort menu items according to priority, then title asc
$menuPriority = array();
$menuTitle = array();
foreach ($menuItems as $key => $menuItem) {
$menuPriority[$key] = is_numeric($menuItem->priority) ? $menuItem->priority : 0;
$menuTitle[$key] = $menuItem->title;
}
array_multisort($menuPriority, SORT_DESC, $menuTitle, SORT_ASC, $menuItems);
return $menuItems;
}
/**
* Get all menu items that the passed member can view.
* Defaults to {@link Member::currentUser()}.
*
* @param Member $member
* @return array
*/
public static function get_viewable_menu_items($member = null)
{
if (!$member && $member !== false) {
$member = Member::currentUser();
}
$viewableMenuItems = array();
$allMenuItems = self::get_menu_items();
if ($allMenuItems) {
foreach ($allMenuItems as $code => $menuItem) {
// exclude all items which have a controller to perform permission
// checks on
if ($menuItem->controller) {
$controllerObj = singleton($menuItem->controller);
if (Controller::has_curr()) {
// Necessary for canView() to have request data available,
// e.g. to check permissions against LeftAndMain->currentPage()
$controllerObj->setRequest(Controller::curr()->getRequest());
if (!$controllerObj->canView($member)) {
continue;
}
}
}
$viewableMenuItems[$code] = $menuItem;
}
}
return $viewableMenuItems;
}
/**
* Removes an existing item from the menu.
*
* @param string $code Unique identifier for this menu item
*/
public static function remove_menu_item($code)
{
self::$menu_item_changes[] = array('type' => 'remove', 'code' => $code);
}
/**
* Remove menu item by class name.
*
* @param string $className Name of class
*/
public static function remove_menu_class($className)
{
$code = self::get_menu_code($className);
self::remove_menu_item($code);
}
/**
* Clears the entire menu
*/
public static function clear_menu()
{
self::$menu_item_changes = array();
self::$menu_is_cleared = true;
}
/**
* Replace a navigation item to the main administration menu showing in the top bar.
*
* @param string $code Unique identifier for this menu item (e.g. used by {@link replace_menu_item()} and
* {@link remove_menu_item}. Also used as a CSS-class for icon customization.
* @param string $menuTitle Localized title showing in the menu bar
* @param string $url A relative URL that will be linked in the menu bar.
* Make sure to add a matching route via {@link Director::$rules} to this url.
* @param string $controllerClass The controller class for this menu, used to check permisssions.
* If blank, it's assumed that this is public, and always shown to users who
* have the rights to access some other part of the admin area.
* @param int $priority
* @param array $attributes an array of attributes to include on the link.
* @return bool Success
*/
public static function replace_menu_item(
$code,
$menuTitle,
$url,
$controllerClass = null,
$priority = -1,
$attributes = null
) {
$item = new CMSMenuItem($menuTitle, $url, $controllerClass, $priority);
if ($attributes) {
$item->setAttributes($attributes);
}
self::$menu_item_changes[] = array(
'type' => 'add',
'code' => $code,
'item' => $item,
);
}
/**
* Add a previously built menu item object to the menu
*
* @param string $code
* @param CMSMenuItem $cmsMenuItem
*/
protected static function add_menu_item_obj($code, $cmsMenuItem)
{
self::$menu_item_changes[] = array(
'type' => 'add',
'code' => $code,
'item' => $cmsMenuItem,
);
}
/**
* A utility funciton to retrieve subclasses of a given class that
* are instantiable (ie, not abstract) and have a valid menu title.
*
* Sorted by url_priority config.
*
* @todo A variation of this function could probably be moved to {@link ClassInfo}
* @param string $root The root class to begin finding subclasses
* @param boolean $recursive Look for subclasses recursively?
* @param string $sort Name of config on which to sort. Can be 'menu_priority' or 'url_priority'
* @return array Valid, unique subclasses
*/
public static function get_cms_classes($root = null, $recursive = true, $sort = self::MENU_PRIORITY)
{
if (!$root) {
$root = 'SilverStripe\\Admin\\LeftAndMain';
}
/** @todo Make these actual abstract classes */
$abstractClasses = ['SilverStripe\\Admin\\LeftAndMain', 'SilverStripe\\CMS\\Controllers\\CMSMain'];
$subClasses = array_values(ClassInfo::subclassesFor($root));
foreach ($subClasses as $className) {
if ($recursive && $className != $root) {
$subClasses = array_merge($subClasses, array_values(ClassInfo::subclassesFor($className)));
}
}
$subClasses = array_unique($subClasses);
foreach ($subClasses as $key => $className) {
// Remove abstract classes and LeftAndMain
if (in_array($className, $abstractClasses) || ClassInfo::classImplements($className, 'SilverStripe\\Dev\\TestOnly')) {
unset($subClasses[$key]);
} else {
// Separate conditional to avoid autoloading the class
$classReflection = new ReflectionClass($className);
if (!$classReflection->isInstantiable()) {
unset($subClasses[$key]);
}
}
}
// Sort by specified sorting config
usort($subClasses, function ($a, $b) use ($sort) {
$priorityA = Config::inst()->get($a, $sort);
$priorityB = Config::inst()->get($b, $sort);
return $priorityB - $priorityA;
});
return $subClasses;
}
/**
* IteratorAggregate Interface Method. Iterates over the menu items.
*/
public function getIterator()
{
return new ArrayIterator(self::get_menu_items());
}
/**
* Provide menu titles to the i18n entity provider
*/
public function provideI18nEntities()
{
$cmsClasses = self::get_cms_classes();
$entities = array();
foreach ($cmsClasses as $cmsClass) {
$defaultTitle = LeftAndMain::menu_title($cmsClass, false);
$ownerModule = i18n::get_owner_module($cmsClass);
$entities["{$cmsClass}.MENUTITLE"] = array($defaultTitle, 'Menu title', $ownerModule);
}
return $entities;
}
}