silverstripe-cms/code/CMSMenu.php
Sam Minnee 2ee0c0991b Merged branches/2.3
git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/cms/trunk@66109 467b73ca-7a2a-4603-9d3b-597d59a354a9
2008-11-18 01:48:50 +00:00

219 lines
6.9 KiB
PHP

<?php
/**
* The object manages the main CMS menu
*
* @package cms
* @subpackage content
*/
class CMSMenu extends Object implements Iterator
{
protected static $menu_items = array();
/**
* Generate CMS main menu items by collecting valid
* subclasses of {@link LeftAndMain}
*/
public static function populate_menu() {
$cmsClasses = self::get_cms_classes();
foreach($cmsClasses as $cmsClass) {
self::add_controller($cmsClass);
}
return true;
}
/**
* Add a LeftAndMain controller to the CMS menu.
*
* @param string $controllerClass The class name of the controller
* @return The result of the operation
* @todo A director rule is added when a controller link is added, but it won't be removed
* when the item is removed. Functionality needed in {@link Director}.
*/
public static function add_controller($controllerClass) {
$controller = singleton($controllerClass);
$link = $controller->Link();
if(substr($link,-1) == '/') $link = substr($link,0,-1);
$subRule = $controller->stat('url_rule', true);
if($subRule[0] == '/') $subRule = substr($subRule,1);
$rule = $link . '//' . $subRule;
Director::addRules($controller->stat('url_priority', true), array(
$rule => $controllerClass
));
return self::add_menu_item(
$controllerClass,
$controller->getMenuTitle(),
$controller->Link(),
$controllerClass,
$controller->stat('menu_priority')
);
}
/**
* Add an arbitrary URL to the CMS menu.
*
* @param string $code A unique identifier (used to create a CSS ID and as it's 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 $priority The menu priority (sorting order) of the menu item. Higher priorities will be further left.
* @return boolean The result of the operation.
*/
public static function add_link($code, $menuTitle, $url, $priority = -1) {
return self::add_menu_item($code, $menuTitle, $url, null, $priority);
}
/**
* Add a navigation item to the main administration menu showing in the top bar.
*
* @uses {@link CMSMenu::$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 $controllerClass The controller class for this menu, used to check permisssions.
* If blank, it's assumed that this is public, and always shown to users who
* have the rights to access some other part of the admin area.
* @return boolean Success
*/
public static function add_menu_item($code, $menuTitle, $url, $controllerClass = null, $priority = -1) {
// If a class is defined, then force the use of that as a code. This helps prevent menu item duplication
if($controllerClass) $code = $controllerClass;
$menuItems = self::$menu_items;
if(isset($menuItems[$code])) return false;
return self::replace_menu_item($code, $menuTitle, $url, $controllerClass, $priority);
}
/**
* Get a single menu item by its code value.
*
* @param string $code
* @return array
*/
public static function get_menu_item($code) {
$menuItems = self::$menu_items;
return (isset($menuItems[$code])) ? $menuItems[$code] : false;
}
/**
* Get all menu entries.
*
* @return array
*/
public static function get_menu_items() {
return self::$menu_items;
}
/**
* Removes an existing item from the menu.
*
* @param string $code Unique identifier for this menu item
*/
public static function remove_menu_item($code) {
$menuItems = self::$menu_items;
if(isset($menuItems[$code])) unset($menuItems[$code]);
// replace the whole array
self::$menu_items = $menuItems;
}
/**
* Clears the entire menu
*
*/
public static function clear_menu() {
self::$menu_items = array();
}
/**
* 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::addRules()} to this url.
* @param string $controllerClass The controller class for this menu, used to check permisssions.
* If blank, it's assumed that this is public, and always shown to users who
* have the rights to access some other part of the admin area.
* @return boolean Success
*/
public static function replace_menu_item($code, $menuTitle, $url, $controllerClass = null, $priority = -1) {
$menuItems = self::$menu_items;
$menuItems[$code] = new CMSMenuItem($menuTitle, $url, $controllerClass, $priority);
$menuPriority = array();
$i = 0;
foreach($menuItems as $key => $menuItem) {
$i++;
// This funny litle formula ensures that the first item added with the same priority will be left-most.
$menuPriority[$key] = $menuItem->priority*100 - $i;
}
array_multisort($menuPriority, SORT_DESC, $menuItems);
self::$menu_items = $menuItems;
return true;
}
/**
* A utility funciton to retrieve subclasses of a given class that
* are instantiable (ie, not abstract) and have a valid menu title.
*
* @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 $recursive Look for subclasses recursively?
* @return array Valid, unique subclasses
*/
public static function get_cms_classes($root = 'LeftAndMain', $recursive = true) {
$subClasses = array_values(ClassInfo::subclassesFor($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
$classReflection = new ReflectionClass($className);
if(!$classReflection->isInstantiable() || 'LeftAndMain' == $className) {
unset($subClasses[$key]);
} else {
if(singleton($className)->getMenuTitle() == '') {
unset($subClasses[$key]);
}
}
}
return $subClasses;
}
// Iterator Interface Methods
public function key() {
return key(self::$menu_items);
}
public function current() {
return current(self::$menu_items);
}
public function next() {
return next(self::$menu_items);
}
public function rewind() {
return reset(self::$menu_items);
}
public function valid() {
return (bool)self::current();
}
}
?>