<?php
/****

This plugin escapes modx tags that are enclosed in %EscapeModx% %/EscapeModx% tags.

eg in a resource content in a RTE:
%EscapeModx%
[[!AndIf?
	  &condition=`[[+description]]%%notempty%%1||[[+urlLink]]%%notempty%%1`
	  &operator=`OR`
	  &operatorSeparator = `%%`
	  &then=`this is an example`
]]
%/EscapeModx%

The following events should be set:
- OnBeforeDocFormSave
- OnDocFormRender
- OnWebPagePrerender
***/

$eventName = $modx->event->name;
$escapeModxKeyIn = '%EscapeModx%';//escape tag in
$escapeModxKeyOut = '%/EscapeModx%';//escape tag out
$escapeModxTags_debug = false;

switch ($eventName) {
	/*** OnBeforeDocFormSave ***/
	case 'OnBeforeDocFormSave' :
        $output = $resource->get('content');
		if ($escapeModxTags_debug) if ($escapeModxTags_debug) $modx->log(MODX_LOG_LEVEL_DEBUG,"--> escapeModxTags-------OnBeforeDocFormSave-----".$output);

		if (strpos($output, $escapeModxKeyIn) === false) return;

        preg_match_all('/'.preg_quote($escapeModxKeyIn,'/').'(.*?)'.preg_quote($escapeModxKeyOut,'/').'/ims', $output, $matches);

		if ($escapeModxTags_debug) $modx->log(MODX_LOG_LEVEL_DEBUG,"--> escapeModxTags----OnBeforeDocFormSave--------".print_r($matches,true));

        foreach ($matches[1] as $key => $match) {
			if ($escapeModxTags_debug) $modx->log(MODX_LOG_LEVEL_DEBUG,"--> escapeModxTags----OnBeforeDocFormSave--------".$output);
            $match64 = base64_encode($match);
			$output=str_replace($escapeModxKeyIn.$match.$escapeModxKeyOut,$escapeModxKeyIn.'Encoded64'.$match64.$escapeModxKeyOut,$output);
        }
        $resource->set('content', $output);
        break;

	/*** OnDocFormRender ***/
    case 'OnDocFormRender' :
        $output = $resource->get('content');
		if ($escapeModxTags_debug) $modx->log(MODX_LOG_LEVEL_DEBUG,"--> escapeModxTags----OnDocFormRender--------".$output);

		if (strpos($output, $escapeModxKeyIn) === false) return;

        preg_match_all('/'.preg_quote($escapeModxKeyIn,'/').'Encoded64(.*?)'.preg_quote($escapeModxKeyOut,'/').'/ims', $output, $matches);

        foreach ($matches[1] as $key => $match64) {
            $match = base64_decode($match64);
			if ($escapeModxTags_debug) $modx->log(MODX_LOG_LEVEL_DEBUG,"--> escapeModxTags----OnDocFormRender--------".$match);
			$output=str_replace($escapeModxKeyIn.'Encoded64'.$match64.$escapeModxKeyOut,$escapeModxKeyIn.$match.$escapeModxKeyOut,$output);
        }
        $resource->set('content', $output);

		if ($escapeModxTags_debug) $modx->log(MODX_LOG_LEVEL_DEBUG,"--> escapeModxTags----OnDocFormRender--content------".$resource->get('content').print_r(debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS,15) ,true));
        break;

	/*** OnWebPagePrerender ***/
    case 'OnWebPagePrerender' :
        $output = $modx->resource->_output;
		if ($escapeModxTags_debug) $modx->log(MODX_LOG_LEVEL_DEBUG,"--> escapeModxTags----OnWebPagePrerender--------".$output);

		if (strpos($output, $escapeModxKeyIn) === false) return;

        preg_match_all('/'.preg_quote($escapeModxKeyIn,'/').'Encoded64(.*?)'.preg_quote($escapeModxKeyOut,'/').'/ims', $output, $matches);

        foreach ($matches[1] as $key => $match64) {
            $match = base64_decode($match64);
			$output=str_replace($escapeModxKeyIn.'Encoded64'.$match64.$escapeModxKeyOut,$match,$output);
        }
		$modx->resource->_output = $output;

		if ($escapeModxTags_debug) $modx->log(MODX_LOG_LEVEL_DEBUG,"--> escapeModxTags----OnWebPagePrerender--content------".$modx->resource->_output);

        break;
}