/**
 Plugin Name: WebSnprX
 Plugin URI: http://www.mademyday.de
 Description: WebSnprX simply integrates <a href="http://www.websnapr.com">WebSnapr</a>-Script in your MODx content. Adds preview bubble to all external links. The link reference has to be the first attribute of the a tag.
 Version: 0.6.7 - 14.09.09
 Author: Marc Hinse - www.mademyday.de (based on a Wordpress plugin by XSized - http://tagg.selfip.com/blog/wordpress-plugin-snapr/)
 Modified: Thomas Jakobi - www.partout.info
 Events: OnWebPagePrerender
 **/

global $modx;

$e = &$modx->Event;
switch ($e->name) {
    case "OnWebPagePrerender":
        // search and replace external Links in document
        $text = $modx->documentOutput;
        $modx->documentOutput = str_replace('<a href="http://', '<a class="previewlink" href="http://', $modx->documentOutput);
        $modx->documentOutput = str_replace('class="previewlink" href="'.$modx->config['site_url'], 'href="'.$modx->config['site_url'], $modx->documentOutput);
        // generate JS for the header
        if (strpos($modx->documentOutput, 'previewlink'))
            $modx->documentOutput = str_replace('</head>', '<script type="text/javascript" src="/assets/plugins/WebSnprX/previewbubble.js"></script>'."\r\n".'</head>', $modx->documentOutput);
        break;
    
    default:
        return; // stop here - this is very important.
        break;
}