<?php

	// Проверка
	if (! defined('BASE_DIR'))
		exit('Access denied');

	/**
	 * This source file is part of the AVE.cms. More information,
	 * documentation and tutorials can be found at http://www.ave-cms.ru
	 *
	 * @package AVE.cms
	 * @file system/helpers/hooks.php
	 * @author @
	 * @copyright 2007-2016 (c) AVE.cms
	 * @link http://www.ave-cms.ru
	 * @version 4.0
	 * @since $date$
	 * @license license GPL v.2 http://www.ave-cms.ru/license.txt
	*/

	class Hooks
	{
		public static $instance;

		public static $hooks;

		public static $current_hook;

		public static $run_hooks;


		public static function init ()
		{
			if (!self::$instance) {
				self::$instance = new Hooks();
			}
			return self::$instance;
		}

		/**
		 * Add Hook
		 */
		public static function register ($name, $function, $priority = 10)
		{
			// If we have already registered this action return true
			if (isset(self::$hooks[$name][$priority][$function]))
			{
				return true;
			}
			/**
			 * Allows us to iterate through multiple action hooks.
			 */
			if (is_array($name))
			{
				foreach ($name AS $item)
				{
					// Store the action hook in the $hooks array
					self::$hooks[$item][$priority][$function] = array(
						"function" => $function
					);
				}
			}
			else
			{
				// Store the action hook in the $hooks array
				self::$hooks[$name][$priority][$function] = array(
					"function" => $function
				);
			}

			return true;
		}

		/**
		 * Do Hook
		 */
		public static function trigger ($hook_name, $arguments = "")
		{
			// Oh, no you didn't. Are you trying to run an action hook that doesn't exist?
			if (! isset(self::$hooks[$hook_name]))
			{
				return $arguments;
			}

			// Set the current running hook to this
			self::$current_hook = $hook_name;

			// Key sort our action hooks
			ksort(self::$hooks[$hook_name]);
			foreach (self::$hooks[$hook_name] AS $priority => $names)
			{
				if (is_array($names))
				{
					foreach ($names AS $name)
					{
						$return = call_user_func_array($name['function'], array(
							&$arguments
						));

						if ($return)
						{
							$arguments = $return;
						}

						// ИСПРАВЛЕНИЕ: Устранение Fatal Error и Warning. 
						// Используем $hook_name (строка) в качестве ключа.
						self::$run_hooks[$hook_name][$priority] = (self::$run_hooks[$hook_name][$priority] ?? 0) + 1;
					}
				}
			}

			self::$current_hook = '';

			return $arguments;
		}

		/**
		 * Remove Hook
		 */
		public static function unregister ($name, $function, $priority = 10)
		{
			// If the action hook doesn't, just return true
			if (!isset(self::$hooks[$name][$priority][$function]))
			{
				return true;
			}
			// Remove the action hook from our hooks array
			unset(self::$hooks[$name][$priority][$function]);

			return '';
		}


		/**
		 * Current Hook
		 *
		 * Get the currently running action hook
		 *
		 */
		public static function current ()
		{
			return self::$current_hook;
		}


		/**
		 * Has Run
		 */
		public static function has ($hook, $priority = 10)
		{
			if (isset(self::$hooks[$hook][$priority]))
			{
				return true;
			}
			else
			{
				return false;
			}
		}


		/**
		 * Hook Exists
		 */
		public static function exists ($name)
		{
			if (isset(self::$hooks[$name]))
			{
				return true;
			}
			else
			{
				return false;
			}
		}
	}
?>