From 72712175b594ac3d5b04672d3f801585f6d544e2 Mon Sep 17 00:00:00 2001
From: Zach Prezkuta <fermion@gmx.com>
Date: Sun, 26 Aug 2012 14:56:34 -0600
Subject: [PATCH] regular expressions were grabbing too much

---
 include/bb2diaspora.php  | 61 +---------------------------------------
 include/bbcode.php       | 59 ++++++++++++++++++++++++++++++++++++++
 include/conversation.php | 37 +++++++++++++++---------
 3 files changed, 84 insertions(+), 73 deletions(-)

diff --git a/include/bb2diaspora.php b/include/bb2diaspora.php
index b0e12027a..f00741790 100644
--- a/include/bb2diaspora.php
+++ b/include/bb2diaspora.php
@@ -8,65 +8,6 @@ require_once("include/bbcode.php");
 require_once("include/markdownify/markdownify.php");
 
 
-function get_bb_tag_pos($s, $name, $occurance = 1) {
-
-	if($occurance < 1)
-		$occurance = 1;
-
-	$start_open = -1;
-	for($i = 1; $i <= $occurance; $i++) {
-		if( $start_open !== false)
-			$start_open = strpos($s, '[' . $name, $start_open + 1); // allow [name= type tags
-	}
-
-	if( $start_open === false)
-		return false;
-
-	$start_equal = strpos($s, '=', $start_open);
-	$start_close = strpos($s, ']', $start_open);
-
-	if( $start_close === false)
-		return false;
-
-	$start_close++;
-
-	$end_open = strpos($s, '[/' . $name . ']', $start_close);
-
-	if( $end_open === false)
-		return false;
-
-	$res = array( 'start' => array('open' => $start_open, 'close' => $start_close),
-	              'end' => array('open' => $end_open, 'close' => $end_open + strlen('[/' . $name . ']')) );
-	if( $start_equal !== false)
-		$res['start']['equal'] = $start_equal + 1;
-
-	return $res;
-}
-
-function bb_tag_preg_replace($pattern, $replace, $name, $s) {
-
-	$string = $s;
-
-	$occurance = 1;
-	$pos = get_bb_tag_pos($string, $name, $occurance);
-	while($pos !== false && $occurance < 1000) {
-
-		$start = substr($string, 0, $pos['start']['open']);
-		$subject = substr($string, $pos['start']['open'], $pos['end']['close'] - $pos['start']['open']);
-		$end = substr($string, $pos['end']['close']);
-		if($end === false)
-			$end = '';
-
-		$subject = preg_replace($pattern, $replace, $subject);
-		$string = $start . $subject . $end;
-
-		$occurance++;
-		$pos = get_bb_tag_pos($string, $name, $occurance);
-	}
-
-	return $string;
-}
-
 // we don't want to support a bbcode specific markdown interpreter
 // and the markdown library we have is pretty good, but provides HTML output.
 // So we'll use that to convert to HTML, then convert the HTML back to bbcode,
@@ -113,7 +54,7 @@ function diaspora2bb($s) {
 	//$s = preg_replace("/([^\]\=]|^)(https?\:\/\/)(vimeo|youtu|www\.youtube|soundcloud)([a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\%\$\!\+\,]+)/ism", '$1[url=$2$3$4]$2$3$4[/url]',$s);
 	$s = bb_tag_preg_replace("/\[url\=?(.*?)\]https?:\/\/www.youtube.com\/watch\?v\=(.*?)\[\/url\]/ism",'[youtube]$2[/youtube]','url',$s);
 	$s = bb_tag_preg_replace("/\[url\=https?:\/\/www.youtube.com\/watch\?v\=(.*?)\].*?\[\/url\]/ism",'[youtube]$1[/youtube]','url',$s);
-	$s = bb_tag_preg_replace("/\[url\=?(.*?)\]https?:\/	\/vimeo.com\/([0-9]+)(.*?)\[\/url\]/ism",'[vimeo]$2[/vimeo]','url',$s);
+	$s = bb_tag_preg_replace("/\[url\=?(.*?)\]https?:\/\/vimeo.com\/([0-9]+)(.*?)\[\/url\]/ism",'[vimeo]$2[/vimeo]','url',$s);
 	$s = bb_tag_preg_replace("/\[url\=https?:\/\/vimeo.com\/([0-9]+)\](.*?)\[\/url\]/ism",'[vimeo]$1[/vimeo]','url',$s);
 	// remove duplicate adjacent code tags
 	$s = preg_replace("/(\[code\])+(.*?)(\[\/code\])+/ism","[code]$2[/code]", $s);
diff --git a/include/bbcode.php b/include/bbcode.php
index 29ee71d41..6f22d1970 100644
--- a/include/bbcode.php
+++ b/include/bbcode.php
@@ -47,6 +47,65 @@ function bb_unspacefy_and_trim($st) {
   return $unspacefied;
 }
 
+function get_bb_tag_pos($s, $name, $occurance = 1) {
+
+	if($occurance < 1)
+		$occurance = 1;
+
+	$start_open = -1;
+	for($i = 1; $i <= $occurance; $i++) {
+		if( $start_open !== false)
+			$start_open = strpos($s, '[' . $name, $start_open + 1); // allow [name= type tags
+	}
+
+	if( $start_open === false)
+		return false;
+
+	$start_equal = strpos($s, '=', $start_open);
+	$start_close = strpos($s, ']', $start_open);
+
+	if( $start_close === false)
+		return false;
+
+	$start_close++;
+
+	$end_open = strpos($s, '[/' . $name . ']', $start_close);
+
+	if( $end_open === false)
+		return false;
+
+	$res = array( 'start' => array('open' => $start_open, 'close' => $start_close),
+	              'end' => array('open' => $end_open, 'close' => $end_open + strlen('[/' . $name . ']')) );
+	if( $start_equal !== false)
+		$res['start']['equal'] = $start_equal + 1;
+
+	return $res;
+}
+
+function bb_tag_preg_replace($pattern, $replace, $name, $s) {
+
+	$string = $s;
+
+	$occurance = 1;
+	$pos = get_bb_tag_pos($string, $name, $occurance);
+	while($pos !== false && $occurance < 1000) {
+
+		$start = substr($string, 0, $pos['start']['open']);
+		$subject = substr($string, $pos['start']['open'], $pos['end']['close'] - $pos['start']['open']);
+		$end = substr($string, $pos['end']['close']);
+		if($end === false)
+			$end = '';
+
+		$subject = preg_replace($pattern, $replace, $subject);
+		$string = $start . $subject . $end;
+
+		$occurance++;
+		$pos = get_bb_tag_pos($string, $name, $occurance);
+	}
+
+	return $string;
+}
+
 if(! function_exists('bb_extract_images')) {
 function bb_extract_images($body) {
 
diff --git a/include/conversation.php b/include/conversation.php
index 0b091571f..1fc064285 100644
--- a/include/conversation.php
+++ b/include/conversation.php
@@ -1,5 +1,8 @@
 <?php
 
+require_once("include/bbcode.php");
+
+
 // Note: the code in 'item_extract_images' and 'item_redir_and_replace_images'
 // is identical to the code in mod/message.php for 'item_extract_images' and
 // 'item_redir_and_replace_images'
@@ -51,19 +54,27 @@ function item_redir_and_replace_images($body, $images, $cid) {
 	$origbody = $body;
 	$newbody = '';
 
-	for($i = 0; $i < count($images); $i++) {
-		$search = '/\[url\=(.*?)\]\[!#saved_image' . $i . '#!\]\[\/url\]' . '/is';
+	$cnt = 1;
+	$pos = get_bb_tag_pos($origbody, 'url', 1);
+	while($pos !== false && $cnt < 1000) {
+
+		$search = '/\[url\=(.*?)\]\[!#saved_image([0-9]*)#!\]\[\/url\]' . '/is';
 		$replace = '[url=' . z_path() . '/redir/' . $cid 
-		           . '?f=1&url=' . '$1' . '][!#saved_image' . $i . '#!][/url]' ;
+		           . '?f=1&url=' . '$1' . '][!#saved_image' . '$2' .'#!][/url]';
 
-		$img_end = strpos($origbody, '[!#saved_image' . $i . '#!][/url]') + strlen('[!#saved_image' . $i . '#!][/url]');
-		$process_part = substr($origbody, 0, $img_end);
-		$origbody = substr($origbody, $img_end);
+		$newbody .= substr($origbody, 0, $pos['start']['open']);
+		$subject = substr($origbody, $pos['start']['open'], $pos['end']['close'] - $pos['start']['open']);
+		$origbody = substr($origbody, $pos['end']['close']);
+		if($origbody === false)
+			$origbody = '';
 
-		$process_part = preg_replace($search, $replace, $process_part);
-		$newbody = $newbody . $process_part;
+		$subject = preg_replace($search, $replace, $subject);
+		$newbody .= $subject;
+
+		$cnt++;
+		$pos = get_bb_tag_pos($origbody, 'url', 1);
 	}
-	$newbody = $newbody . $origbody;
+	$newbody .= $origbody;
 
 	$cnt = 0;
 	foreach($images as $image) {
@@ -293,10 +304,10 @@ function localize_item(&$item){
 	}
 
 	// add zrl's to public images
-	if(preg_match_all('/\[url=(.*?)\/photos\/(.*?)\/image\/(.*?)\]\[img(.*?)\]h(.*?)\[\/img\]\[\/url\]/is',$item['body'],$matches,PREG_SET_ORDER)) {
-		foreach($matches as $mtch) {
-				$item['body'] = str_replace($mtch[0],'[url=' . zrl($mtch[1] . '/photos/' . $mtch[2] . '/image/' . $mtch[3] ,true) . '][img' . $mtch[4] . ']h' . $mtch[5]  . '[/img][/url]',$item['body']);
-		}
+	$photo_pattern = "/\[url=(.*?)\/photos\/(.*?)\/image\/(.*?)\]\[img(.*?)\]h(.*?)\[\/img\]\[\/url\]/is";
+	if(preg_match($photo_pattern,$item['body'])) {
+		$photo_replace = '[url=' . zrl('$1' . '/photos/' . '$2' . '/image/' . '$3' ,true) . '][img' . '$4' . ']h' . '$5'  . '[/img][/url]';
+		$item['body'] = bb_tag_preg_replace($photo_pattern, $photo_replace, 'url', $item['body']);
 	}
 
 	// add sparkle links to appropriate permalinks