From 593af9feb6cdbb88e250501938722e656fe4a17a Mon Sep 17 00:00:00 2001
From: Craig Andrews <candrews@integralblue.com>
Date: Tue, 14 Jul 2009 13:33:40 -0400
Subject: [PATCH] Moved the decision logic as to whether an attachment should
 be an enclosure to the File class

---
 classes/File.php   | 13 +++++++++++++
 classes/Notice.php |  2 +-
 lib/rssaction.php  |  2 +-
 lib/twitterapi.php |  2 +-
 4 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/classes/File.php b/classes/File.php
index 533cc6e71d..289c6e4418 100644
--- a/classes/File.php
+++ b/classes/File.php
@@ -193,5 +193,18 @@ class File extends Memcached_DataObject
 
         return 'http://'.$server.$path.$filename;
     }
+
+    function isEnclosure(){
+        if(isset($this->filename)){
+            return true;
+        }
+        $notEnclosureMimeTypes = array('text/html');
+        $mimetype = strtolower($this->mimetype);
+        $semicolon = strpos($mimetype,';');
+        if($semicolon){
+            $mimetype = substr($mimetype,0,$semicolon);
+        }
+        return(! in_array($mimetype,$notEnclosureMimeTypes));
+    }
 }
 
diff --git a/classes/Notice.php b/classes/Notice.php
index fc28f35588..08125cf7b0 100644
--- a/classes/Notice.php
+++ b/classes/Notice.php
@@ -1170,7 +1170,7 @@ class Notice extends Memcached_DataObject
         $attachments = $this->attachments();
         if($attachments){
             foreach($attachments as $attachment){
-                if (isset($attachment->filename)) {
+                if ($attachment->isEnclosure()) {
                     $attributes = array('rel'=>'enclosure','href'=>$attachment->url,'type'=>$attachment->mimetype,'length'=>$attachment->size);
                     if($attachment->title){
                         $attributes['title']=$attachment->title;
diff --git a/lib/rssaction.php b/lib/rssaction.php
index 183c09f473..ffa1f9e99f 100644
--- a/lib/rssaction.php
+++ b/lib/rssaction.php
@@ -237,7 +237,7 @@ class Rss10Action extends Action
         $attachments = $notice->attachments();
         if($attachments){
             foreach($attachments as $attachment){
-                if (isset($attachment->filename)) {
+                if ($attachment->isEnclosure()) {
                     // DO NOT move xmlns declaration to root element. Making it
                     // the default namespace here improves compatibility with
                     // real-world feed readers.
diff --git a/lib/twitterapi.php b/lib/twitterapi.php
index ce188e00d8..655b6c7778 100644
--- a/lib/twitterapi.php
+++ b/lib/twitterapi.php
@@ -218,7 +218,7 @@ class TwitterapiAction extends Action
         if($attachments){
             $entry['enclosures']=array();
             foreach($attachments as $attachment){
-                if (isset($attachment->filename)) {
+                if ($attachment->isEnclosure()) {
                     $enclosure=array();
                     $enclosure['url']=$attachment->url;
                     $enclosure['mimetype']=$attachment->mimetype;