<?php

/**

 * Smarty Internal Plugin Filter Handler

 * Smarty filter handler class

 *

 * @package    Smarty

 * @subpackage PluginsInternal

 * @author     Uwe Tews

 */

/**

 * Class for filter processing

 *

 * @package    Smarty

 * @subpackage PluginsInternal

 */

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') which shall run

     * @param  string $content the content which shall be processed by the filters

     * @param  Smarty_Internal_Template $template template object

     *

     * @throws SmartyException

     * @return string                   the filtered content

     */

    public static function runFilter($type, $content, Smarty_Internal_Template $template) {

        $output = $content;

        // 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;

    }

}