From 49ea05b8ff27c31924ddf94c582ab4260faf56c2 Mon Sep 17 00:00:00 2001
From: Fabio Comuni <fabrix.xm@gmail.com>
Date: Mon, 31 Jan 2011 16:45:58 +0100
Subject: [PATCH] use microformat to mark html from [embed] tag, convert html
 with oembed microformat to [embed] tag

---
 include/bbcode.php |  2 +-
 include/items.php  |  3 +++
 include/oembed.php | 44 ++++++++++++++++++++++++++++++++++++++++----
 3 files changed, 44 insertions(+), 5 deletions(-)

diff --git a/include/bbcode.php b/include/bbcode.php
index c17e5dded3..eb0806dc52 100644
--- a/include/bbcode.php
+++ b/include/bbcode.php
@@ -94,7 +94,7 @@ function bbcode($Text) {
 	$Text = preg_replace("/\[youtube\](.+?)\[\/youtube\]/", '<object width="425" height="350" type="application/x-shockwave-flash" data="http://www.youtube.com/v/$1" ><param name="movie" value="http://www.youtube.com/v/$1"></param><!--[if IE]><embed src="http://www.youtube.com/v/$1" type="application/x-shockwave-flash" width="425" height="350" /><![endif]--></object>', $Text);
 
 	// oembed tag
-	$Text = oembed_bbcode($Text);
+	$Text = oembed_bbcode2html($Text);
 
 	call_hooks('bbcode',$Text);
 
diff --git a/include/items.php b/include/items.php
index a5991d663b..f204745bb4 100644
--- a/include/items.php
+++ b/include/items.php
@@ -1,6 +1,7 @@
 <?php
 
 require_once('bbcode.php');
+require_once('oembed.php');
 
 function get_feed_for(&$a, $dfrn_id, $owner_nick, $last_update, $direction = 0) {
 
@@ -395,6 +396,8 @@ function get_atom_elements($feed,$item) {
 		$res['body'] = preg_replace('#<object[^>]+>.+?' . 'http://www.youtube.com/((?:v|cp)/[A-Za-z0-9\-_=]+).+?</object>#s',
 			'[youtube]$1[/youtube]', $res['body']);
 
+		$res['body'] = oembed_html2bbcode($res['body']);
+	
 		$config = HTMLPurifier_Config::createDefault();
 		$config->set('Cache.DefinitionImpl', null);
 
diff --git a/include/oembed.php b/include/oembed.php
index cec9cf75af..f9441b3709 100644
--- a/include/oembed.php
+++ b/include/oembed.php
@@ -4,7 +4,7 @@ function oembed_replacecb($matches){
   $ourl = "http://oohembed.com/oohembed/?url=".urlencode($embedurl);  
   $txt = fetch_url($ourl);
   $j = json_decode($txt);
-  $ret="<!-- oembed $embedurl -->";
+  $ret="<span class='oembed'>";
   switch ($j->type) {
     case "video": {
        if (isset($j->thumbnail_url)) {
@@ -32,18 +32,54 @@ function oembed_replacecb($matches){
   }
   
   $embedlink = (isset($j->title))?$j->title:$embedurl;
-  $ret .= "<a href='$embedurl'>$embedlink</a>";
+  $ret .= "<a href='$embedurl' rel='oembed'>$embedlink</a>";
   if (isset($j->author_name)) $ret.=" by ".$j->author_name;
   if (isset($j->provider_name)) $ret.=" on ".$j->provider_name;
-  $ret.="<!-- /oembed $embedurl -->";
+  $ret.="</span>";
   return $ret;
 }
 
-function oembed_bbcode($text){
+function oembed_bbcode2html($text){
 	$stopoembed = get_config("system","no_oembed");
 	if ($stopoembed == true){
 		return preg_replace("/\[embed\](.+?)\[\/embed\]/is", "<!-- oembed $1 --><i>". t('Embedding disabled') ." : $1</i><!-- /oembed $1 -->" ,$text);
 	}
 	return preg_replace_callback("/\[embed\](.+?)\[\/embed\]/is", oembed_replacecb ,$text);
 }
+
+
+function oe_build_xpath($attr, $value){
+	// http://westhoffswelt.de/blog/0036_xpath_to_select_html_by_class.html
+	return "contains( normalize-space( @$attr ), ' $value ' ) or substring( normalize-space( @$attr ), 1, string-length( '$value' ) + 1 ) = '$value ' or substring( normalize-space( @$attr ), string-length( @$attr ) - string-length( '$value' ) ) = ' $value' or @$attr = '$value'";
+}
+
+function oe_get_inner_html( $node ) {
+    $innerHTML= '';
+    $children = $node->childNodes;
+    foreach ($children as $child) {
+        $innerHTML .= $child->ownerDocument->saveXML( $child );
+    }
+    return $innerHTML;
+} 
+
+/**
+ * Find <span class='oembed'>..<a href='url' rel='oembed'>..</a></span>
+ * and replace it with [embed]url[/embed]
+ */
+function oembed_html2bbcode($text) {
+	$dom = DOMDocument::loadHTML($text);
+	$xpath = new DOMXPath($dom);
+	$attr = "oembed";
+	
+	$xattr = oe_build_xpath("class","oembed");
+	$entries = $xpath->query("//span[$xattr]");
+	
+	$xattr = oe_build_xpath("rel","oembed");
+	foreach($entries as $e) {
+		$href = $xpath->evaluate("a[$xattr]/@href", $e)->item(0)->nodeValue;
+		if(!is_null($href)) $e->parentNode->replaceChild(new DOMText("[embed]".$href."[embed]"), $e);
+	}
+	return oe_get_inner_html( $dom->getElementsByTagName("body")->item(0) ); 
+}
+
 ?>
\ No newline at end of file