}
$attrs = array('href' => $longurl, 'rel' => 'external');
+
+// if this URL is an attachment, then we set class='attachment' and id='attahcment-ID'
+// where ID is the id of the attachment for the given URL.
+ $query = "select file_oembed.file_id as file_id from file join file_oembed on file.id = file_oembed.file_id where file.url='$longurl'";
+ $file = new File;
+ $file->query($query);
+ $file->fetch();
+
+ if (!empty($file->file_id)) {
+ $query = "select file_thumbnail.file_id as file_id from file join file_thumbnail on file.id = file_thumbnail.file_id where file.url='$longurl'";
+ $file2 = new File;
+ $file2->query($query);
+ $file2->fetch();
+
+ if (empty($file2->file_id)) {
+ $attrs['class'] = 'attachment';
+ } else {
+ $attrs['class'] = 'attachment thumbnail';
+ }
+ $attrs['id'] = "attachment-{$file->file_id}";
+ }
return XMLStringer::estring('a', $attrs, $display);
}