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<?php defined('SYSPATH') or die('No direct script access.');
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/*
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* This file is part of open source system FreenetIS
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* and it is released under GPLv3 licence.
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*
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* More info about licence can be found:
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* http://www.gnu.org/licenses/gpl-3.0.html
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*
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* More info about project can be found:
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* http://www.freenetis.org/
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*
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*/
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/**
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* This is library for path = history of urls
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* It works as iterarator
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*
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* @author Michal Kliment, David Raška
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* @version 1.0
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*/
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class Path
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{
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/** String constant for propeerty name of path class in query string */
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const QSNAME = 'path_qsurl';
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/**
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* Actual path
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* @var string
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*/
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private $path = NULL;
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/**
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* Returns path as only URI
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* @var boolean
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*/
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private $uri = FALSE;
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/**
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* Returns path with lang (only if URI is true)
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* @var boolean
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*/
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private $lang = TRUE;
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/**
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* For singleton instance
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* @var Path object
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*/
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private static $instance = NULL;
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/**
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* Creates or return instance of object
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*
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* @author Michal Kliment
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* @return Path object
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*/
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public static function instance()
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{
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// Create the instance if it does not exist
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empty(self::$instance) and new Path;
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return self::$instance;
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}
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/**
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* Constructor, only clear object
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*
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* @author Michal Kliment
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*/
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public function __construct ()
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{
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if (self::$instance === NULL)
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{
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$this->clear();
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self::$instance = $this;
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}
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}
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/**
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* Clear object - sets to default value
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*
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* @author Michal Kliment
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* @return Path object
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*/
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public function clear()
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{
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if (isset($_GET[Path::QSNAME]))
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$this->path = url::base().Config::get('lang').'/'.urldecode($_GET[Path::QSNAME]);
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return $this;
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}
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/**
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* Returns URL of current position in object
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*
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* @author Michal Kliment
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* @param intger $offset
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* @param integer $length
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* @return string
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*/
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public function previous($offset = 0, $length = NULL)
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{
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// returns only uri
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if ($this->uri)
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{
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$path = url::uri($this->path);
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// returns without lang
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if (!$this->lang)
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$offset++;
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}
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else
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$path = $this->path;
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// returns rest of string
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if (!$length)
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$length = count(explode('/', $path))-$offset;
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return url::slice($path, $offset, $length);
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}
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/**
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* Sets boolean values for URI and lang
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*
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* @author Michal Kliment
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* @param bolean $uri
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* @param boolean $lang
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* @return Path
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*/
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public function uri($uri = TRUE, $lang = FALSE)
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{
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$this->uri = $uri;
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$this->lang = $lang;
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return $this;
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}
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}
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