From a5826fec251447c1d9c94700183e9ed458127fba Mon Sep 17 00:00:00 2001
From: zotlabs <mike@macgirvin.com>
Date: Thu, 7 Nov 2019 14:51:29 -0800
Subject: svg stuff

---
 include/bbcode.php | 21 +++++++++++++++++++++
 include/text.php   | 22 ++++++++++++++++++++++
 2 files changed, 43 insertions(+)

(limited to 'include')

diff --git a/include/bbcode.php b/include/bbcode.php
index bb9144b1d..84f0f3dda 100644
--- a/include/bbcode.php
+++ b/include/bbcode.php
@@ -4,6 +4,8 @@
  * @brief BBCode related functions for parsing, etc.
  */
 
+use Zotlabs\Lib\SvgSanitizer;
+
 require_once('include/oembed.php');
 require_once('include/event.php');
 require_once('include/zot.php');
@@ -267,6 +269,22 @@ function bb_parse_app($match) {
 		return Zotlabs\Lib\Apps::app_render($app);
 }
 
+function bb_svg($match) {
+
+	$params = str_replace(['<br>', '&quot;'], [ '', '"'],$match[1]);
+	$Text = str_replace([ '[',']' ], [ '<','>' ], $match[2]);
+	
+	$output =  '<svg' . (($params) ? $params : ' width="100%" height="480" ') . '>' . str_replace(['<br>', '&quot;', '&nbsp;'], [ '', '"', ' '],$Text) . '</svg>';
+
+	$purify = new SvgSanitizer();
+	$purify->loadXML($output);
+	$purify->sanitize();
+	$output = $purify->saveSVG();
+	$output = preg_replace("/\<\?xml(.*?)\?\>/",'',$output);
+	return $output;
+}
+
+
 function bb_parse_element($match) {
 	$j = json_decode(base64url_decode($match[1]),true);
 
@@ -1289,6 +1307,9 @@ function bbcode($Text, $options = []) {
 		$Text = preg_replace_callback("/\[zaudio\](.*?\.(ogg|ogv|oga|ogm|webm|mp4|mp3|opus|m4a))\[\/zaudio\]/ism", 'tryzrlaudio', $Text);
 	}
 
+	// SVG stuff
+	$Text = preg_replace_callback("/\[svg(.*?)\](.*?)\[\/svg\]/ism", 'bb_svg', $Text);
+
 	// Try to Oembed
 	if ($tryoembed) {
 		if (strpos($Text,'[/video]') !== false) {
diff --git a/include/text.php b/include/text.php
index 54ad9ec7a..2496ca934 100644
--- a/include/text.php
+++ b/include/text.php
@@ -9,6 +9,8 @@ use Michelf\MarkdownExtra;
 use Ramsey\Uuid\Uuid;
 use Ramsey\Uuid\Exception\UnsatisfiedDependencyException;
 
+use Zotlabs\Lib\SvgSanitizer;
+
 require_once("include/bbcode.php");
 
 // random string, there are 86 characters max in text mode, 128 for hex
@@ -3648,3 +3650,23 @@ function new_uuid() {
 
 	return $hash;
 }
+
+
+function svg2bb($s) {
+
+	$s = preg_replace("/\<text (.*?)\>(.*?)\<(.*?)\<\/text\>/", '<text $1>$2&lt;$3</text>', $s);
+	$s = preg_replace("/\<text (.*?)\>(.*?)\>(.*?)\<\/text\>/", '<text $1>$2&gt;$3</text>', $s);
+	$s = preg_replace("/\<text (.*?)\>(.*?)\[(.*?)\<\/text\>/", '<text $1>$2&#91;$3</text>', $s);
+	$s = preg_replace("/\<text (.*?)\>(.*?)\](.*?)\<\/text\>/", '<text $1>$2&#93;$3</text>', $s);
+	$s = utf8_encode($s);
+	$purify = new SvgSanitizer();
+	if ($purify->loadXML($s)) {
+		$purify->sanitize();
+		$output = $purify->saveSVG();
+		$output = preg_replace("/\<\?xml(.*?)\>/",'',$output);
+		$output = preg_replace("/\<\!\-\-(.*?)\-\-\>/",'',$output);
+		$output = str_replace(['<','>'],['[',']'],$output);
+		return $output;
+	}
+	return EMPTY_STR;
+}
-- 
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