modx_fm

public function addition() {
    $content = $this->modx->documentOutput;
    $tags= array ();
    if ($collected = $this->modx->parser->collectElementTags($content, $tags, '[[', ']]')) {

        $dom = new DOMDocument();
        // Disable libxml errors occur when parsing tags modx
        libxml_use_internal_errors(true);
        $dom->loadHTML($content);
        $xpath = new DOMXpath($dom);

        foreach ($tags as $tag) {
            /* Avoid all processing for comment tags, e.g. [[- comments here]] */
            if (substr($tag[1], 0, 1) === '-') {
                continue;
            }

            $tagParts= xPDO :: escSplit('?', $tag[1], '`', 2);
            $tagName= trim($tagParts[0]);

            /* String of parameters. Not yet used. */
            //$tagPropString= null;
            //if (isset ($tagParts[1])) {
            //    $tagPropString= trim($tagParts[1]);
            //}

            $token = substr($tagName, 0, 1);
            $tokenOffset = 0;
            if ($token === '!') {
                $tokenOffset++;
                $token = substr($tagName, $tokenOffset, 1);
            }

            unset($elementPS);
            if (strpos($tagName, '@') !== false) {
                $split = xPDO :: escSplit('@', $tagName);
                if ($split && isset($split[1])) {
                    $psName = $split[1];
                    $filters = xPDO :: escSplit(':', $psName);
                    if ($filters && isset($filters[0]) && !empty($filters[0])) {
                        $ps = $this->modx->getObject('modPropertySet', array('name' => $filters[0] ));
                        $elementPS = array(
                            'type' => 'propertyset',
                            'identifier' => $ps->get('id'),
                            'name' => $filters[0]
                        );
                    }
                }
            }

            switch ($token) {
                case '%':
                case '~':
                    /* skip links and lexicons */
                    continue 2;
                    break;
                case '+':
                    if(substr($tagName, 0, 2) == '++') {
                        $tagName = substr($tagName, 2 + $tokenOffset);
                        $tagName = $this->modx->parser->realname($tagName);
                        $element = array(
                            'type' => 'system',
                            'identifier' => $tagName
                        );
                    } else {
                        /* skip placeholders */
                        continue 2;
                    }
                    break;
                case '$':
                    $tagName = substr($tagName, 1 + $tokenOffset);
                    $tagName = $this->modx->parser->realname($tagName);
                    $element = array(
                        'type' => 'chunk',
                        'identifier' => $this->modx->getObject('modChunk',array('name' => $tagName ))->get('id'),
                        'name' => $tagName
                    );
                    break;
                case '#': // TODO: fastfield in pdoParser
                    continue 2;
                case '*':
                    $tagName = substr($tagName, 1 + $tokenOffset);
                    $tagName = $this->modx->parser->realname($tagName);
                    if (is_array($this->modx->resource->_fieldMeta) && in_array($tagName, array_keys($this->modx->resource->_fieldMeta))) {
                        $element = array(
                            'type' => 'field',
                            'identifier' => $tagName,
                            'resource' => $this->modx->resourceIdentifier
                        );
                    } else {
                        $element = array(
                            'type' => 'tv',
                            'identifier' => $this->modx->getObject('modTemplateVar', array('name'=>$tagName))->get('id'),
                            'resource' => $this->modx->resourceIdentifier
                        );
                    }
                    break;
                default:
                    if($this->config['snippets_editable']) {
                        $tagName = substr($tagName, $tokenOffset);
                        $tagName = $this->modx->parser->realname($tagName);

                        if($snippet = $this->modx->getObject('modSnippet', array('name' => $tagName))) {
                            $element = array(
                                'type' => 'snippet',
                                'identifier' => $snippet->get('id'),
                                'name' => $tagName
                            );
                        }
                    }
            }

            if(isset($element)) {
                $key = implode('-', $element);
                $attr = array(
                    $key => $element
                );

                if(isset($elementPS)) {
                    $attr['propertyset-'.$elementPS['identifier']] = $elementPS;
                }

                /** @var DOMNodeList $NodeList */
                $NodeList = $xpath->query('/html/body//text()[contains(.,"' . $tag[0] . '")]/..|/html/body//attribute::*[contains(.,"' . $tag[0] . '")]/..');

                /** @var DOMNode $Node */
                foreach ($NodeList as $Node) {
                    if($Node->hasAttribute('frontmanager')) {
                        $attr = array_merge(
                            $this->modx->fromJSON($Node->getAttribute('frontmanager')),
                            $attr
                        );
                    }

                    $Node->setAttribute(
                        "frontmanager",
                        $this->modx->toJSON($attr)
                    );
                }

                $content = $dom->saveHTML();
            }
        }

        /* fix percent-encoding for "[" and "]" */
        $content = str_replace("%5D", "]",str_replace("%5B", "[", $content));

        $this->modx->documentOutput = $content;
    }
}