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<?php
/**
* Smarty Method LoadFilter
*
* Smarty::loadFilter() method
*
* @package Smarty
* @subpackage PluginsInternal
* @author Uwe Tews
*/
class Smarty_Internal_Method_LoadFilter
{
/**
* Valid for Smarty and template object
*
* @var int
*/
public $objMap = 3;
/**
* Valid filter types
*
* @var array
*/
private $filterTypes = array('pre' => true, 'post' => true, 'output' => true, 'variable' => true);
/**
* load a filter of specified type and name
*
* @api Smarty::loadFilter()
*
* @link http://www.smarty.net/docs/en/api.load.filter.tpl
*
* @param \Smarty_Internal_TemplateBase|\Smarty_Internal_Template|\Smarty $obj
* @param string $type filter type
* @param string $name filter name
*
* @return bool
* @throws SmartyException if filter could not be loaded
*/
public function loadFilter(Smarty_Internal_TemplateBase $obj, $type, $name)
{
$smarty = isset($obj->smarty) ? $obj->smarty : $obj;
$this->_checkFilterType($type);
$_plugin = "smarty_{$type}filter_{$name}";
$_filter_name = $_plugin;
if (is_callable($_plugin)) {
$smarty->registered_filters[$type][$_filter_name] = $_plugin;
return true;
}
if ($smarty->loadPlugin($_plugin)) {
if (class_exists($_plugin, false)) {
$_plugin = array($_plugin, 'execute');
}
if (is_callable($_plugin)) {
$smarty->registered_filters[$type][$_filter_name] = $_plugin;
return true;
}
}
throw new SmartyException("{$type}filter \"{$name}\" not found or callable");
}
/**
* Check if filter type is valid
*
* @param string $type
*
* @throws \SmartyException
*/
public function _checkFilterType($type)
{
if (!isset($this->filterTypes[$type])) {
throw new SmartyException("Illegal filter type \"{$type}\"");
}
}
}
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