<?php
/**
 * Native Lanauge Support: Extractor Config Files
 *
 * $Id$
 *
 * @author gERD Schaufelberger <gerd@php-tools.net>
 * @license PHP License
 * @package WB
 * @subpackage base
 */

WBClass::load('WBNLS_Extractor');

/**
 * Native Lanauge Support: Extractor Config Files
 *
 * Extract translatable strings from XML config files.
 *
 * @version 0.1.0
 * @package WB
 * @subpackage nls
 */
class WBNLS_Extractor_ConfigFile extends WBNLS_Extractor
{
    /**
     * markup scanner
     * @var WBMarkup_Scanner
     */
    private $scanner;

    /**
     * markup handler
     * @var WBMarkup_Handler_I18nExtractor
     */
    private $handler;

    /**
     * config Loader
     * @var WBCoonfig_Loader_File
     */
    protected $configLoader;

    /**
     * init actual config loader
     *
     * In this case load XML config from files
     *
     * @see WBConfig_Loader_File
     */
    protected function startConfigLoader()
    {
        $this->configLoader =   WBClass::create('WBConfig_Loader_File');
    }

    /**
     * setup extractor
     *
     * Start scanner and handler
     *
     * @see WBMarkup_Handler_I18nExtractor_XmlConfig
     * @see WBMarkup_Scanner
     */
    protected function onStart()
    {
        $this->scanner  =   WBClass::create('WBMarkup_Scanner');
        $this->handler  =   WBClass::create('WBMarkup_Handler_I18nExtractor_XmlConfig');
        $this->handler->setImporter($this->imp);
        $this->scanner->setHandler($this->handler);
    }

    /**
     * actually extract messages
     *
     * Extract messages from XML config files
     *
     * @return int $total
     */
    protected function extract()
    {
        $this->startConfigLoader();
        return $this->extractXmlConfigDir('');
    }

    /**
     * extract messages from XML config
     *
     * Use config loader to list and fetch XML config (e.g. from file or database)
     * scan config and list recursively.
     *
     * @param string $dir
     * @return int
     */
    private  function extractXmlConfigDir($dir)
    {
        $d  =   $dir;
        if (!empty($d)) {
            $d  .=  '/';
        }

        $data   =   '';
        $exp    =   null;
        if ($this->configLoader->load($dir, $data, $exp, true)) {
            $this->scanner->scan($data);
        }

        $list   =   $this->configLoader->ls($dir);
        $cnt    =   count($list);
        foreach ($list as $l) {
            $cnt    +=  $this->extractXmlConfigDir($d . $l);
        }

        return $cnt;
    }

}
?>