ACC SHELL

<?php
	// Author: Jakub Macek, CZ; Copyright: Poski.com s.r.o.; Code is 100% my work. Do not copy.
	
	class History
	{
		public static			$active								= true;
		public static			$save_current						= true;
		public static			$return_point						= true;
		const					KEY									= 'history';

		public static function initialize()
		{
			if (!self::$active)
				return;

			if (!isset($_SESSION[self::KEY]) || !is_array($_SESSION[self::KEY]))
				$_SESSION[self::KEY] = array();
		}

		public static function save()
		{
			if (!self::$active || !self::$save_current)
				return;
			if (page()->location == '404')
				return;

			$info = array(
				'timestamp' => time(),
				'request_uri' => substr(site()->url, 0, -strlen(PATH)) . $_SERVER['REQUEST_URI'],
				'page' => $GLOBALS["page"],
				'return_point' => self::$return_point,
			);
			array_unshift($_SESSION[self::KEY], $info);
			$_SESSION[self::KEY] = array_slice($_SESSION[self::KEY], 0, 50);
		}

		public static function last($pattern = null, $field = 'page.location')
		{
			if (!@$_SESSION[self::KEY])
				return null;
			$result = null;
			if ($pattern === null)
				list($result) = array_split($_SESSION[self::KEY], 0, 1);
			else
			{
				if ($negative = (substr($pattern, 0, 1) == '!'))
					$pattern = substr($pattern, 1);
				foreach ($_SESSION[self::KEY] as $info)
				{
					if (substr($field, 0, 4) == 'page')
						$value = $info['page'][substr($field, 5)];
					else
						$value = $info[$field];
					$matches = preg_match($pattern, $value);
					if ((!$negative && $matches) || ($negative && !$matches))
						return $info;
				}
			}
			return $result;
		}
	}
?>