生成后台管理菜单 admin_menu 类

<?php
/**
 * 管理菜单
 *
 */
class App_Helper_Admin_Menu {
	
	const quuid = 'q';
	const qargs = 'args';
	const qtitle = 'title';
	const qtype = 'type';
	const qparent = 'parent';
	const qchildren = 'children';
	const qactive = 'active';
	
	/**
	 * 顶级菜单标识
	 */
	const qparent_top = '#ROOT#';
	
	/**
	 * 茎节点
	 */
	const qtype_stem = 'stem';
	
	/**
	 * 叶节点
	 */
	const qtype_leaf = 'leaf';
	
	private function __construct(){
		$this->init();
	}
	
	/**
	 * @return App_Helper_Admin_Menu
	 */
	static function getInstance(){
		static $it = false;
		if (!$it){
			$it = new self();
		}
		return $it;
	}
	
	/**
	 * 返回生成的 菜单
	 * 
	 * @return array
	 */
	private function init(){
		
		$qid = Core_AppUtils::get(Core_Mvc_Router::queryAccessor);
		
		$active = false;
		
		$catalog = $this->aclFilter($this->loadData());	
		
		do {
			$item = Core_AppUtils::val($catalog,$qid,null);
			if (empty($item)) break;
			
			$active = $catalog[$qid][self::qactive] = true;
			if (self::qparent_top == $item[self::qparent]) break;
			
			$qid = $item[self::qparent];
			
		} while(true);
		
		// 转成树
		$catalog = (array) Core_AppUtils::array_to_tree($catalog,self::quuid,self::qparent,self::qchildren);
		
		// 节点过滤,规范 茎叶类型
		$catalog = $this->nodeFilter($catalog);
		
		$this->catalog = $this->locateActiveItem($catalog);
		
		Core_AppUtils::dump($this->catalog);
	}
	
	private function loadData(){
		
		$catalog = array();
		
		$catalog[] = array(
			'q' => 'admin.application.index',
			'args' => null,
			'title' => '系统设置',
			'parent' => '#ROOT#',
			'type' => 'stem',
		);
		
		$catalog[] = array(
			'q' => 'admin.user.list',
			'args' => null,
			'title' => '用户列表',
			'parent' => 'admin.application.index',
			'type' => 'stem',
		);
		
		$catalog[] = array(
			'q' => 'admin.user.create',
			'args' => null,
			'title' => '用户创建',
			'parent' => 'admin.application.index',
			'type' => 'leaf',
		);
		
		$catalog[] = array(
			'q' => 'admin.user.rolelist',
			'args' => null,
			'title' => '用户角色列表',
			'parent' => 'admin.user.list',
			'type' => 'leaf',
		);
		
		$catalog[] = array(
			'q' => 'admin.application.logout',
			'args' => null,
			'title' => '注销登录',
			'parent' => '#ROOT#',
			'type' => 'leaf',
		);
		
		return Core_AppUtils::array_to_hashmap($catalog,self::quuid) ;
	}

	private function locateActiveItem(array $items){
		
		$activeItem = null;
		
		foreach ($items as $offset => $item){
			if (Core_AppUtils::val($item,self::qactive,false)){
				$activeItem = & $items[$offset];
				break;
			}
		}
		if (empty($activeItem)) {
			$activeItem = & $items[0];
			$activeItem[self::qactive] = true;
		}
		if (self::qtype_stem == $activeItem[self::qtype]){
			$activeItem[self::qchildren] = $this->locateActiveItem($activeItem[self::qchildren]);
		}
		return $items;
	}
	
	private function nodeFilter(array $items){
		
		if (empty($items)) return $items;
		
		$data = array();
		foreach ($items as $item){
			
			switch ($item[self::qtype]) {
				
				case self::qtype_leaf: 
					unset($item[self::qchildren]);
					break;
					
				case self::qtype_stem:
					if (empty($item[self::qchildren])){
						$item[self::qtype] = self::qtype_leaf;
						unset($item[self::qchildren]);
					}else {
						$item[self::qchildren] = $this->nodeFilter($item[self::qchildren]);
					}
					break;
				
				default:
					$item = null;
			}
			
			if (!empty($items)) $data[] = $item;				
		}
		
		return $data;
	}
	
	private function aclFilter(array $items){
		
		if (empty($items)) return $items;
		
		if (Core_Event::isRegistered(Core_Mvc_EventId::dispatching_aclcheck)){
			$data = array();
			foreach ($items as $uuid => $item){				
				if (App_Convention::canAccess($uuid) ){
					$data[$uuid] = $item;
				}
			}
			return $data;
		}
		
		return $items;		
	}
}