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<?php
/**
* Piwik - Open source web analytics
*
* @link http://piwik.org
* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
* @version $Id$
*
* @category Piwik
* @package Piwik
*/
/**
* @see libs/Smarty/Smarty.class.php
* @link http://smarty.net
*/
require_once PIWIK_INCLUDE_PATH . '/libs/Smarty/Smarty.class.php';
/**
* Smarty class
*
* @package Piwik
* @subpackage Piwik_Smarty
* @see Smarty, libs/Smarty/Smarty.class.php
* @link http://smarty.net/manual/en/
*/
class Piwik_Smarty extends Smarty
{
function trigger_error($error_msg, $error_type = E_USER_WARNING)
{
throw new SmartyException($error_msg);
}
public function __construct($smConf = array(), $filter = true)
{
parent::__construct();
if(count($smConf) == 0)
{
$smConf = Piwik_Config::getInstance()->smarty;
}
foreach($smConf as $key => $value)
{
$this->$key = $value;
}
$this->template_dir = $smConf['template_dir'];
array_walk($this->template_dir, array("Piwik_Smarty","addPiwikPath"), PIWIK_INCLUDE_PATH);
$this->plugins_dir = $smConf['plugins_dir'];
array_walk($this->plugins_dir, array("Piwik_Smarty","addPiwikPath"), PIWIK_INCLUDE_PATH);
$this->compile_dir = $smConf['compile_dir'];
Piwik_Smarty::addPiwikPath($this->compile_dir, null, PIWIK_USER_PATH);
$this->cache_dir = $smConf['cache_dir'];
Piwik_Smarty::addPiwikPath($this->cache_dir, null, PIWIK_USER_PATH);
$error_reporting = $smConf['error_reporting'];
if($error_reporting != (string)(int)$error_reporting)
{
$error_reporting = self::bitwise_eval($error_reporting);
}
$this->error_reporting = $error_reporting;
if($filter)
{
$this->load_filter('output', 'cachebuster');
$use_ajax_cdn = Piwik_Config::getInstance()->General['use_ajax_cdn'];
if($use_ajax_cdn)
{
$this->load_filter('output', 'ajaxcdn');
}
$this->load_filter('output', 'trimwhitespace');
}
}
/**
* Evaluate expression containing only bitwise operators.
* Replaces defined constants with corresponding values.
* Does not use eval().
*
* @param string $expression Expression.
* @return string
*/
static public function bitwise_eval($expression)
{
// replace defined constants
$buf = get_defined_constants(true);
// use only the 'Core' PHP constants, e.g., E_ALL, E_STRICT, ...
$consts = isset($buf['Core']) ? $buf['Core'] : (isset($buf['mhash']) ? $buf['mhash'] : $buf['internal']);
$expression = str_replace(' ', '', strtr($expression, $consts));
// bitwise operators in order of precedence (highest to lowest)
// note: boolean ! (NOT) and parentheses aren't handled
$expression = preg_replace_callback('/~(-?[0-9]+)/', @create_function('$matches', 'return (string)((~(int)$matches[1]));'), $expression);
$expression = preg_replace_callback('/(-?[0-9]+)&(-?[0-9]+)/', @create_function('$matches', 'return (string)((int)$matches[1]&(int)$matches[2]);'), $expression);
$expression = preg_replace_callback('/(-?[0-9]+)\^(-?[0-9]+)/', @create_function('$matches', 'return (string)((int)$matches[1]^(int)$matches[2]);'), $expression);
$expression = preg_replace_callback('/(-?[0-9]+)\|(-?[0-9]+)/', @create_function('$matches', 'return (string)((int)$matches[1]|(int)$matches[2]);'), $expression);
return (string)((int)$expression & PHP_INT_MAX);
}
/**
* Prepend relative paths with absolute Piwik path
*
* @param string $value relative path (pass by reference)
* @param int $key (don't care)
* @param string $path Piwik root
*/
static public function addPiwikPath(&$value, $key, $path)
{
if($value[0] != '/' && $value[0] != DIRECTORY_SEPARATOR)
{
$value = $path ."/$value";
}
}
}
/**
* @package Piwik
* @subpackage Piwik_Smarty
*/
class SmartyException extends Exception {}
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