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<?php

/**
 * Smarty Internal Plugin Filter Handler
 * 
 * Smarty filter handler class
 * 
 * @package Smarty
 * @subpackage PluginsInternal
 * @author Uwe Tews 
 */

/**
 * Class for filter processing
 */
class Smarty_Internal_Filter_Handler {
    /**
     * Run filters over content
     * 
     * The filters will be lazy loaded if required
     * class name format: Smarty_FilterType_FilterName
     * plugin filename format: filtertype.filtername.php
     * Smarty2 filter plugins could be used
     * 
     * @param string $type the type of filter ('pre','post','output' or 'variable') which shall run
     * @param string $content the content which shall be processed by the filters
     * @return string the filtered content
     */
    static function runFilter($type, $content, $template, $flag = null)
    {
        $output = $content;
        if ($type != 'variable' || ($template->smarty->variable_filter && $flag !== false) || $flag === true) {
            // loop over autoload filters of specified type
            if (!empty($template->smarty->autoload_filters[$type])) {
                foreach ((array)$template->smarty->autoload_filters[$type] as $name) {
                    $plugin_name = "Smarty_{$type}filter_{$name}";
                    if ($template->smarty->loadPlugin($plugin_name)) {
                        if (function_exists($plugin_name)) {
                            // use loaded Smarty2 style plugin
                            $output = $plugin_name($output, $template);
                        } elseif (class_exists($plugin_name, false)) {
                            // loaded class of filter plugin
                            $output = call_user_func(array($plugin_name, 'execute'), $output, $template);
                        } 
                    } else {
                        // nothing found, throw exception
                        throw new SmartyException("Unable to load filter {$plugin_name}");
                    } 
                } 
            } 
            // loop over registerd filters of specified type
            if (!empty($template->smarty->registered_filters[$type])) {
                foreach ($template->smarty->registered_filters[$type] as $key => $name) {
                    if (is_array($template->smarty->registered_filters[$type][$key])) {
                        $output = call_user_func($template->smarty->registered_filters[$type][$key], $output, $template);
                    } else {
                        $output = $template->smarty->registered_filters[$type][$key]($output, $template);
                    } 
                } 
            } 
        } 
        // return filtered output
        return $output;
    } 
} 

?>
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