<?php
// WebYep
// (C) Objective Development Software GmbH
// http://www.obdev.at

define("WYPATH_CHECK_NOPATH", 1);
define("WYPATH_CHECK_NOSCRIPT", 2);
define("WYPATH_CHECK_JUSTIMAGE", 4);
define("WYPATH_CHECK_JUSTAUDIO", 8);

class WYPath
{
	// class methods
	function sMakeFilename($s)
	{
		$sOut = "";
      global $webyep_sCharset;
      global $WYPath_dISOToFilename, $WYPath_dUTF8ToFilename;

      if (!isset($WYPath_dISOToFilename)) $WYPath_dISOToFilename = array("Ä" => "Ae", "Ö" => "Oe", "Ü" => "Ue", "ä" => "ae", "ö" => "oe", "ü" => "ue", "ß" => "ss", " " => "_", "'" => "_", "/" => "_", "\\" => "_", "." => "_", ":" => "_");
      if (!isset($WYPath_dUTF8ToFilename)) $WYPath_dUTF8ToFilename = array(utf8_encode("Ä") => "Ae", utf8_encode("Ö") => "Oe", utf8_encode("Ü") => "Ue", utf8_encode("ä") => "ae", utf8_encode("ö") => "oe", utf8_encode("ü") => "ue", utf8_encode("ß") => "ss", " " => "_", "'" => "_", "/" => "_", "\\" => "_", "." => "_", ":" => "_");

      if ($webyep_sCharset == "" || strtolower($webyep_sCharset) == "iso-8859-1" || strtolower($webyep_sCharset) == "iso-8859-2") {
	      $s = strtr($s, $WYPath_dISOToFilename);
      }
      else if (strtolower($webyep_sCharset) == "utf-8") {
	      $s = strtr($s, $WYPath_dUTF8ToFilename);
      }
      $iLen = strlen($s);
      for ($i = 0; $i < $iLen; $i++) {
         $c = $s[$i];
	      if (ord($c) > 127) $sOut .= "_" . ord($c) . "_";
	      else $sOut .= $c;
      }
		return $sOut;
	}
   
	// instance variables	
	// public
	var $sPath;
	
	// instance methods

	function WYPath($s)
	{
		$this->sPath = $s;
      $this->sPath = str_replace("\\", "/", $this->sPath);
      // $this->sPath = str_replace(":", "/", $this->sPath);
      // must not remove ":" - windows pathes need it!
      $this->sPath = str_replace("\0", "", $this->sPath);
	}
	
   function bCheck($iCheckMask)
   {
      $bOK = true;
      $sF = $this->sPath;
      if (strpos($this->sPath, "\0") !== false) return false; // no null bytes
      if ($iCheckMask & WYPATH_CHECK_NOPATH) {
         if (  strpos($this->sPath, "..") !== false ||
               strpos($this->sPath, "/") !== false ||
               strpos($this->sPath, "\\") !== false ) return false;
      }
      if ($iCheckMask & WYPATH_CHECK_JUSTIMAGE) {
         $sExt = strtolower($this->sExtension());
         $aImageExtensions = array("gif", "jpg", "jpeg", "png");
         if ($sExt == "" || !in_array($sExt, $aImageExtensions, true)) return false;
      }
      if ($iCheckMask & WYPATH_CHECK_JUSTAUDIO) {
         $sExt = strtolower($this->sExtension());
         $aAudioExtensions = array("mp3");
         if ($sExt == "" || !in_array($sExt, $aAudioExtensions, true)) return false;
      }
      if ($iCheckMask & WYPATH_CHECK_NOSCRIPT) {
         $sExt = strtolower($this->sExtension());
         $aScriptExtensions = array("js", "php", "php4", "php5", "phtml", "shtml", "asp", "jsp", "sh");
         if ($sExt != "" && in_array($sExt, $aScriptExtensions, false)) return false;
      }
      return $bOK;
   }

	function removeLastComponent()
	{
		$iPos = 0;

		if ($this->sPath && $this->sPath != "/") {
			if (substr($this->sPath, -1) == "/") $this->sPath = substr($this->sPath, 0, strlen($this->sPath) - 1);
			$iPos = strrpos($this->sPath, "/");
			if ($iPos !== false) {
				if ($iPos == 0) $this->sPath = "/";
				else $this->sPath = substr($this->sPath, 0, $iPos);
			}
			else {
				$this->sPath = "";
			}
		}
	}
	
	function addComponent($s)
	{
		if (substr($this->sPath, -1) != "/") $this->sPath .= "/";
		$this->sPath .= $s;
	}

	function normalize()
	{
		$sPath = $this->sPath;
		if ($sPath[0] != "/") return; // can only normalize absolute pathes
		if (substr($sPath, -2) == "..") $sPath .= "/";
		$iPos = 0;
		while($iPos < strlen($sPath)) {
			if (substr($sPath, $iPos, 4) == "/../") {
				$iBackPos = webyep_strpos_backwards($sPath, "/", $iPos-1);
				$sPath = substr($sPath, 0, $iBackPos) . "/" . substr($sPath, $iPos+4);
				$iPos = $iBackPos;
			}
			else $iPos++;
		}
		$this->sPath = $sPath;
	}

	function sExtension()
	{
		$sExt = "";

		$iDotPos = strrpos($this->sPath, ".");
		$iSlashPos = strrpos($this->sPath, "/");
		if ($iDotPos) {
			if ($iSlashPos === false || $iSlashPos < $iDotPos) {
				$sExt = substr($this->sPath, $iDotPos + 1);
			}
		}
		return $sExt;
	}
	
	function sBasename()
	{
		return basename($this->sPath);
	}
	
	function setExtension($sExt)
	{
		$this->removeExtension();
		$this->sPath .= ".$sExt";
	}

	function removeExtension()
	{
		$iDotPos = strrpos($this->sPath, ".");
		$iSlashPos = strrpos($this->sPath, "/");
		if ($iDotPos) {
			if ($iSlashPos === false || $iSlashPos < $iDotPos) {
				$this->sPath = substr($this->sPath, 0, $iDotPos);
			}
		}
	}
   
   function bExists()
   {
      return file_exists($this->sPath);
   }

   function removeDemoSlotID()
   {
      global $webyep_sLiveDemoSlotID;
      $this->sPath = preg_replace('|/' . WEBYEP_DEMOSLOT_PREFIX . '([end]{2})([0-9]+)/|', "/", $this->sPath);
      if ($webyep_sLiveDemoSlotID != "") $this->sPath = str_replace("_$webyep_sLiveDemoSlotID", "", $this->sPath);
   }
}
?>