Ticket #13066: get_lastcommentmodified.diff

wp-includes/comment.php

@@ -402 +402 @@
  * @return string Last comment modified date.
  */
 function get_lastcommentmodified($timezone = 'server') {
-        global $cache_lastcommentmodified, $wpdb;
-
+        global $cache_lastcommentmodified, $wpdb, $wp, $wp_query;
+        
         if ( isset($cache_lastcommentmodified[$timezone]) )
                 return $cache_lastcommentmodified[$timezone];
 
+        //If wp_query has not been completely loaded (e.g when it's called in send_headers()),
+        //this has to parse the query, but without fetching anything from the database.
+        if( empty($wp_query->query_vars) ) {
+                $wp->build_query_string();
+                $wp_query->parse_query($wp->query_vars);
+        }
+        
+        $q = $wp_query->query_vars;
+
         $add_seconds_server = date('Z');
 
-        switch ( strtolower($timezone)) {
+        switch ( strtolower($timezone) ) {
                 case 'gmt':
-                        $lastcommentmodified = $wpdb->get_var("SELECT comment_date_gmt FROM $wpdb->comments WHERE comment_approved = '1' ORDER BY comment_date_gmt DESC LIMIT 1");
+                        $select = 'SELECT comment_date_gmt';
                         break;
                 case 'blog':
-                        $lastcommentmodified = $wpdb->get_var("SELECT comment_date FROM $wpdb->comments WHERE comment_approved = '1' ORDER BY comment_date_gmt DESC LIMIT 1");
+                        $select = 'SELECT comment_date';
                         break;
                 case 'server':
-                        $lastcommentmodified = $wpdb->get_var($wpdb->prepare("SELECT DATE_ADD(comment_date_gmt, INTERVAL %s SECOND) FROM $wpdb->comments WHERE comment_approved = '1' ORDER BY comment_date_gmt DESC LIMIT 1", $add_seconds_server));
+                default:
+                        $select = $wpdb->prepare('SELECT DATE_ADD(comment_date_gmt, INTERVAL %s SECOND)', $add_seconds_server);
                         break;
         }
 
+        $join = '';
+        $needposts = false;
+        $where = "WHERE comment_approved = '1'";
+
+        $p = '';
+        if ( '' !== $q['p'] )
+                $p = $q['p'];
+
+        elseif ( '' !== $q['page_id'] )
+                $p = $q['page_id'];
+
+        elseif ( '' !== $q['attachment_id'] )
+                $p = $q['attachment_id'];
+
+
+        $name = '';
+        if ( '' !== $q['name'] )
+                $name = $q['name'];
+
+        elseif ( '' !== $q['pagename'] )
+                $name = $q['pagename'];
+
+        elseif ( '' !== $q['attachment'] )
+                $name = $q['attachment'];
+
+
+        if ( '' != $p)
+                $where .= " AND comment_post_ID = '$p'";
+        
+        if ( '' != $name) {
+                $needposts = true;
+                $where .= " AND $wpdb->posts.post_name = '$name'";
+        }
+
+        if ( !empty($q['author']) ) {
+                $needposts = true;
+                $where .= " AND $wpdb->posts.post_author='{$q['author']}'";
+        }
+
+        if ( '' !== $q['author_name'] ) {
+                $needposts = true;
+                $author = get_user_by('slug', $q['author_name']);
+                if ( $author !== false ) 
+                        $where .= " AND $wpdb->posts.post_author='$author->ID'";
+        }
+
+        if ( '' !== $q['cat'] || '' !== $q['category_name'] ) {
+                if ( !empty($q['cat']) ) {
+                        $cat = $q['cat'];
+                } else {
+                        if ( $term = get_term_by('name', $q['category_name'], 'category') !== false )
+                                $cat = $term->term_taxonomy_id;
+                }
+                
+                if ( isset($cat) ) {
+                        $join =  "INNER JOIN $wpdb->term_relationships ON ($wpdb->posts.ID = $wpdb->term_relationships.object_id)";
+                        $where .= " AND $wpdb->term_relationships.term_taxonomy_id IN ($cat)";
+
+                        $needposts = true;
+                }
+        }
+
+        if($needposts == true)
+                $join = "JOIN $wpdb->posts ON ( $wpdb->comments.comment_post_ID = $wpdb->posts.ID )" . $join;
+
+        $lastcommentmodified = $wpdb->get_var("$select FROM $wpdb->comments $join $where ORDER BY comment_date_gmt DESC LIMIT 1");
         $cache_lastcommentmodified[$timezone] = $lastcommentmodified;
 
         return $lastcommentmodified;