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2809 rexy 1 
<?php
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/**
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 * Smarty Method LoadFilter
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 *
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 * Smarty::loadFilter() method
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 *
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 * @package    Smarty
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 * @subpackage PluginsInternal
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 * @author     Uwe Tews
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 */
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class Smarty_Internal_Method_LoadFilter
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{
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    /**
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     * Valid for Smarty and template object
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     *
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     * @var int
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     */
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    public $objMap = 3;
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    /**
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     * Valid filter types
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     *
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     * @var array
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     */
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    private $filterTypes = array('pre' => true, 'post' => true, 'output' => true, 'variable' => true);
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    /**
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     * load a filter of specified type and name
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     *
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     * @api  Smarty::loadFilter()
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     *
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     * @link http://www.smarty.net/docs/en/api.load.filter.tpl
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     *
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     * @param \Smarty_Internal_TemplateBase|\Smarty_Internal_Template|\Smarty $obj
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     * @param string                                                          $type filter type
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     * @param string                                                          $name filter name
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     *
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     * @return bool
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     * @throws SmartyException if filter could not be loaded
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     */
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    public function loadFilter(Smarty_Internal_TemplateBase $obj, $type, $name)
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    {
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        $smarty = $obj->_getSmartyObj();
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        $this->_checkFilterType($type);
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        $_plugin = "smarty_{$type}filter_{$name}";
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        $_filter_name = $_plugin;
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        if (is_callable($_plugin)) {
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            $smarty->registered_filters[ $type ][ $_filter_name ] = $_plugin;
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            return true;
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        }
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        if ($smarty->loadPlugin($_plugin)) {
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            if (class_exists($_plugin, false)) {
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                $_plugin = array($_plugin, 'execute');
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            }
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            if (is_callable($_plugin)) {
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                $smarty->registered_filters[ $type ][ $_filter_name ] = $_plugin;
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                return true;
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            }
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        }
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        throw new SmartyException("{$type}filter '{$name}' not found or callable");
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    }
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    /**
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     * Check if filter type is valid
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     *
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     * @param string $type
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     *
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     * @throws \SmartyException
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     */
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    public function _checkFilterType($type)
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    {
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        if (!isset($this->filterTypes[ $type ])) {
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            throw new SmartyException("Illegal filter type '{$type}'");
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        }
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    }
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}