Screencast: New plugin adding a help tab to your resources

[s]<?php
/*
    Add help tab to all templates with a link inside the template description that has a rel="help" attribute.
    
    Example description:
    Use this template for XML feeds <a href="add-your-link-here.html" rel="help"></a>
    
    Hints:
    * Don't add text to the documentation link or it can be seen inside the template picker.
    * href can be any resource relative to the manager directory, as well as any internal or external url.
    * Don't forget, that some pages don't like to be put into iframes (googel, for example).
    
*/

$id             = $modx->resource->get('id');
$resource       = $modx->getObject('modResource', $id);

$templateObj    = $modx->resource->getOne('Template');
$description    = $templateObj->get('description');

if (class_exists('DOMDocument')){
    $doc = new DOMDocument(); 
    $doc->loadHTML( $description ); 
    
    $links = $doc->getElementsByTagName( "a" );
    
    foreach($links as $link){
        $rel = $link->getAttribute('rel'); 
        if($rel = 'help'){
            $url = $link->getAttribute('href');
        }
        /* We assume that there is always only one link to the template documentation ... */
        break;
    }

    if(!empty($url)){
        $content = '<iframe onload="parent.MODx.helpWindow.getEl().unmask();" src="' . $url . '" width="100%" height="100%" frameborder="0"></iframe>';
    }
    else {
        return;
    }
}
else {
    return;
}

$html = "
    <script>
        MODx.on('ready',function() {
            MODx.addTab('modx-resource-tabs',{
                title: 'Help',
                id: 'help',
                width: '95%',
			    layout: 'fit',
                items: [{
                    html: '" . $content . "',
			        height: 400
                }]
            });
        });
    </script>
";

$modx->regClientStartupHTMLBlock($html);
return;[/s]

Some helpful description for your TV <a href="add-your-link-here.html" rel="help"></a>

$modx->resource === false